040
FZUS51 KBOX 160204
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1003 PM EDT SAT AUG 15 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-161500-
1003 PM EDT SAT AUG 15 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
HIGH PRES SHIFTS EAST OF THE WATERS SUN NIGHT. LOW PRES THEN
APPROACHES FROM THE WEST BRINGING GUSTY S WINDS AND BUILDING SEAS
THAT HAVE PROMPTED SMALL CRAFT ADVISORIES LATE SUN NIGHT INTO MON.
THE ASSOCIATED COLD FRONT CROSSES THE REGION LATE MON INTO MON NIGHT.
HIGH PRES RETURNS TUE THROUGH THE MIDDLE OF NEXT WEEK.
ANZ250-161500-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
1003 PM EDT SAT AUG 15 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
OVERNIGHT
SW WINDS AROUND 5 KT, BECOMING W. SEAS 1 FOOT OR
LESS. WAVE DETAIL: SW 1 FOOT AT 2 SECONDS AND N 1 FOOT AT
3 SECONDS.
SUN
NE WINDS AROUND 5 KT, BECOMING SE 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS 1 FOOT OR LESS, THEN AROUND
2 FT IN THE AFTERNOON. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND SE
1 FOOT AT 10 SECONDS, BECOMING S 1 FOOT AT 2 SECONDS AND N 1 FOOT
AT 3 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND E 1 FOOT AT
3 SECONDS.
MON
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
4 FT. WAVE DETAIL: SE 3 FT AT 4 SECONDS AND SE 1 FOOT AT
10 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS IN
THE AFTERNOON.
MON NIGHT
SE WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT, BECOMING
N AFTER MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: SE 3 FT AT
5 SECONDS AND SE 1 FOOT AT 10 SECONDS. A CHANCE OF SHOWERS IN THE
EVENING.
TUE AND TUE NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SE 3 FT AT 7 SECONDS AND NW 1 FOOT AT 5 SECONDS.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT. SEAS
AROUND 2 FT.
THU AND THU NIGHT
SW WINDS 5 TO 10 KT, BECOMING NW. SEAS 2 TO
3 FT. A CHANCE OF SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ251-161500-
MASSACHUSETTS BAY AND IPSWICH BAY-
1003 PM EDT SAT AUG 15 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
OVERNIGHT
SW WINDS AROUND 5 KT, BECOMING NW. SEAS 1 FOOT OR
LESS. WAVE DETAIL: S 1 FOOT AT 2 SECONDS AND NE 1 FOOT AT
3 SECONDS.
SUN
NE WINDS AROUND 5 KT, BECOMING SE 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS 1 FOOT OR LESS, THEN AROUND
2 FT IN THE AFTERNOON. WAVE DETAIL: W 1 FOOT AT 2 SECONDS AND NE
1 FOOT AT 3 SECONDS, BECOMING S 1 FOOT AT 3 SECONDS AND E 1 FOOT
AT 3 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 3 SECONDS AND SE 1 FOOT AT
10 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SE 2 FT AT 4 SECONDS AND SE 1 FOOT AT
10 SECONDS. SHOWERS. PATCHY FOG IN THE MORNING.
MON NIGHT
E WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 5 SECONDS AND SE 1 FOOT AT
10 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
TUE AND TUE NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: NE 2 FT AT 5 SECONDS AND W 1 FOOT AT 3 SECONDS.
WED AND WED NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
THU AND THU NIGHT
S WINDS 5 TO 10 KT, BECOMING NW. SEAS AROUND
2 FT. A CHANCE OF SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ231-161500-
CAPE COD BAY-
1003 PM EDT SAT AUG 15 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
OVERNIGHT
S WINDS AROUND 5 KT, BECOMING W. SEAS 1 FOOT OR
LESS. WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND SE 1 FOOT AT
11 SECONDS.
SUN
N WINDS AROUND 5 KT, BECOMING S 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT
IN THE AFTERNOON. WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND SE
1 FOOT AT 12 SECONDS, BECOMING NE 1 FOOT AT 3 SECONDS AND S
1 FOOT AT 3 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: S 1 FOOT AT 2 SECONDS AND E 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SE 2 FT AT 3 SECONDS AND SE 1 FOOT AT
10 SECONDS. SHOWERS LIKELY.
MON NIGHT
S WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 4 SECONDS AND SE 1 FOOT AT
10 SECONDS. SHOWERS LIKELY IN THE EVENING.
TUE AND TUE NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: N 1 FOOT AT 3 SECONDS AND SE 1 FOOT AT 9 SECONDS.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
THU
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
THU NIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ254-161500-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
1003 PM EDT SAT AUG 15 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
OVERNIGHT
W WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL:
N 1 FOOT AT 4 SECONDS AND S 1 FOOT AT 6 SECONDS.
SUN
S WINDS AROUND 5 KT, INCREASING TO 5 TO 10 KT IN THE
AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT AT 5 SECONDS AND
N 1 FOOT AT 4 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND NE 1 FOOT AT
3 SECONDS.
MON
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT. WAVE DETAIL: SE 4 FT AT 5 SECONDS AND SE 1 FOOT AT
9 SECONDS. SHOWERS LIKELY.
MON NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NW AFTER MIDNIGHT. SEAS 4 TO 6 FT, SUBSIDING TO 3 TO 4 FT AFTER
MIDNIGHT. WAVE DETAIL: S 4 FT AT 6 SECONDS AND SE 3 FT AT
10 SECONDS, BECOMING SE 4 FT AT 6 SECONDS. A CHANCE OF SHOWERS.
TUE AND TUE NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: S 4 FT AT 7 SECONDS AND NW 2 FT AT 5 SECONDS.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
THU AND THU NIGHT
SW WINDS 10 TO 15 KT, BECOMING NW 5 TO
10 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ255-161500-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
1003 PM EDT SAT AUG 15 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM LATE SUNDAY NIGHT THROUGH
LATE MONDAY NIGHT...
OVERNIGHT
SW WINDS AROUND 5 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: NE 1 FOOT AT 3 SECONDS AND S 1 FOOT AT 5 SECONDS.
SUN
S WINDS AROUND 5 KT, INCREASING TO 5 TO 10 KT IN THE
AFTERNOON. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT IN THE
AFTERNOON. WAVE DETAIL: NE 1 FOOT AT 4 SECONDS AND S 1 FOOT AT
5 SECONDS, BECOMING S 2 FT AT 5 SECONDS AND NE 1 FOOT AT
4 SECONDS.
SUN NIGHT
S WINDS AROUND 10 KT, INCREASING TO 15 TO 20 KT
AFTER MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS
AND NE 1 FOOT AT 4 SECONDS.
MON
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO
7 FT. WAVE DETAIL: S 5 FT AT 5 SECONDS AND SE 5 FT AT 10 SECONDS.
A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS LIKELY IN THE
AFTERNOON.
MON NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING NW AFTER MIDNIGHT. SEAS 4 TO 6 FT. WAVE DETAIL: S 5 FT
AT 7 SECONDS AND SE 1 FOOT AT 4 SECONDS. A CHANCE OF SHOWERS IN
THE EVENING.
TUE
N WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SW 5 FT
AT 7 SECONDS AND NE 1 FOOT AT 4 SECONDS.
TUE NIGHT
N WINDS AROUND 5 KT, BECOMING W AFTER MIDNIGHT. SEAS
2 TO 3 FT.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
THU AND THU NIGHT
SW WINDS 10 TO 15 KT, BECOMING NW. SEAS 2 TO
3 FT. A CHANCE OF SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ256-161500-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
1003 PM EDT SAT AUG 15 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM LATE SUNDAY NIGHT THROUGH
LATE MONDAY NIGHT...
OVERNIGHT
SW WINDS 5 TO 10 KT, BECOMING W. SEAS 1 FOOT OR
LESS. WAVE DETAIL: E 1 FOOT AT 3 SECONDS AND S 1 FOOT AT
5 SECONDS.
SUN
NE WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON. WAVE DETAIL: E
1 FOOT AT 3 SECONDS AND S 1 FOOT AT 5 SECONDS, BECOMING S 2 FT AT
5 SECONDS AND E 1 FOOT AT 2 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT WITH
GUSTS UP TO 25 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT, BUILDING TO
4 TO 6 FT AFTER MIDNIGHT. WAVE DETAIL: SE 2 FT AT 4 SECONDS AND
SE 1 FOOT AT 9 SECONDS, BECOMING SE 4 FT AT 4 SECONDS AND SE
1 FOOT AT 8 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO
8 FT. WAVE DETAIL: SE 8 FT AT 9 SECONDS AND SE 5 FT AT 5 SECONDS.
SHOWERS LIKELY, MAINLY IN THE MORNING. PATCHY FOG IN THE MORNING
WITH VSBY 1 TO 3 NM.
MON NIGHT
W WINDS 10 TO 15 KT, BECOMING N AFTER MIDNIGHT. SEAS
4 TO 6 FT. WAVE DETAIL: SE 5 FT AT 7 SECONDS. A CHANCE OF SHOWERS
IN THE EVENING.
TUE AND TUE NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: SE 4 FT AT 6 SECONDS.
WED AND WED NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
THU AND THU NIGHT
SW WINDS 10 TO 15 KT, BECOMING NW. SEAS 2 TO
3 FT. A CHANCE OF SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ232-161500-
NANTUCKET SOUND-
1003 PM EDT SAT AUG 15 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
OVERNIGHT
SW WINDS AROUND 5 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: NE 1 FOOT AT 2 SECONDS AND S 1 FOOT AT 5 SECONDS.
SUN
S WINDS AROUND 5 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS 1 FOOT OR LESS, THEN AROUND
2 FT IN THE AFTERNOON. WAVE DETAIL: NE 1 FOOT AT 3 SECONDS AND SW
1 FOOT AT 3 SECONDS, BECOMING S 2 FT AT 3 SECONDS AND NE 1 FOOT
AT 3 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 4 SECONDS AND
SE 1 FOOT AT 10 SECONDS.
MON
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. WAVE DETAIL: SE 3 FT AT 4 SECONDS AND SE 1 FOOT AT
10 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS
LIKELY IN THE AFTERNOON.
MON NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING N AFTER MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT AT
5 SECONDS AND SE 1 FOOT AT 10 SECONDS. SHOWERS LIKELY IN THE
EVENING.
TUE AND TUE NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: N 2 FT AT 4 SECONDS AND E 1 FOOT AT 4 SECONDS.
WED AND WED NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT.
SEAS AROUND 2 FT.
THU AND THU NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING NW. SEAS AROUND 2 FT. A CHANCE OF SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ233-161500-
VINEYARD SOUND-
1003 PM EDT SAT AUG 15 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM LATE SUNDAY NIGHT THROUGH
LATE MONDAY NIGHT...
OVERNIGHT
S WINDS 5 TO 10 KT, BECOMING SW. SEAS 1 FOOT OR
LESS. WAVE DETAIL: E 1 FOOT AT 2 SECONDS AND SW 1 FOOT AT
3 SECONDS.
SUN
NE WINDS AROUND 5 KT, BECOMING S 10 TO 15 KT IN THE
AFTERNOON. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT IN THE
AFTERNOON. WAVE DETAIL: E 1 FOOT AT 2 SECONDS AND SW 1 FOOT AT
4 SECONDS, BECOMING SW 1 FOOT AT 4 SECONDS AND NE 1 FOOT AT
5 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND SE
1 FOOT AT 9 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS AND SE 1 FOOT AT
10 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS
LIKELY IN THE AFTERNOON. PATCHY FOG IN THE MORNING.
MON NIGHT
SW WINDS 10 TO 15 KT, BECOMING N AFTER MIDNIGHT.
SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT AT 6 SECONDS AND SE 2 FT AT
9 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
TUE AND TUE NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: W 3 FT AT 6 SECONDS AND S 3 FT AT 7 SECONDS.
WED AND WED NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT.
THU
SW WINDS 10 TO 15 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
THU NIGHT
NW WINDS 10 TO 15 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ234-161500-
BUZZARDS BAY-
1003 PM EDT SAT AUG 15 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM LATE SUNDAY NIGHT THROUGH
LATE MONDAY NIGHT...
OVERNIGHT
S WINDS 5 TO 10 KT, BECOMING W. SEAS 1 FOOT OR LESS.
WAVE DETAIL: E 1 FOOT AT 2 SECONDS AND SW 1 FOOT AT 3 SECONDS.
SUN
NE WINDS AROUND 5 KT, BECOMING S 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT
IN THE AFTERNOON. WAVE DETAIL: E 1 FOOT AT 3 SECONDS AND SW
1 FOOT AT 3 SECONDS, BECOMING NE 1 FOOT AT 3 SECONDS AND S 1 FOOT
AT 3 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND SE
1 FOOT AT 9 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
4 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS AND SE 1 FOOT AT
10 SECONDS. SHOWERS LIKELY.
MON NIGHT
SW WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND SE 2 FT AT
9 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
TUE AND TUE NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: W 2 FT AT 6 SECONDS AND SE 2 FT AT 7 SECONDS.
WED AND WED NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT.
THU
SW WINDS 10 TO 15 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
THU NIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ235-161500-
RHODE ISLAND SOUND-
1003 PM EDT SAT AUG 15 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM LATE SUNDAY NIGHT THROUGH
LATE MONDAY NIGHT...
OVERNIGHT
S WINDS 5 TO 10 KT, BECOMING W. SEAS 1 FOOT OR LESS.
WAVE DETAIL: E 1 FOOT AT 2 SECONDS AND SW 1 FOOT AT 4 SECONDS.
SUN
NE WINDS AROUND 5 KT, BECOMING S 10 TO 15 KT IN THE
AFTERNOON. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT IN THE
AFTERNOON. WAVE DETAIL: SE 1 FOOT AT 4 SECONDS AND SE 1 FOOT AT
9 SECONDS, BECOMING SE 2 FT AT 3 SECONDS AND SE 1 FOOT AT
9 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT, BUILDING TO 3 TO 5 FT AFTER MIDNIGHT.
WAVE DETAIL: S 2 FT AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS,
BECOMING S 4 FT AT 4 SECONDS AND SE 1 FOOT AT 8 SECONDS. A CHANCE
OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO
7 FT. WAVE DETAIL: S 5 FT AT 7 SECONDS AND SE 2 FT AT 9 SECONDS.
SHOWERS LIKELY. PATCHY FOG IN THE MORNING.
MON NIGHT
W WINDS AROUND 10 KT, BECOMING N AFTER MIDNIGHT.
SEAS 3 TO 5 FT. WAVE DETAIL: SE 4 FT AT 7 SECONDS. A CHANCE OF
SHOWERS IN THE EVENING.
TUE AND TUE NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: S 4 FT AT 7 SECONDS AND E 2 FT AT 7 SECONDS.
WED AND WED NIGHT
SW WINDS 10 TO 15 KT. SEAS AROUND 2 FT.
THU
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
THU NIGHT
NW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ237-161500-
BLOCK ISLAND SOUND-
1003 PM EDT SAT AUG 15 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM LATE SUNDAY NIGHT THROUGH
LATE MONDAY NIGHT...
OVERNIGHT
W WINDS AROUND 5 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: E 1 FOOT AT 3 SECONDS AND SW 1 FOOT AT 5 SECONDS.
SUN
NE WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON. WAVE DETAIL: E
1 FOOT AT 3 SECONDS AND S 1 FOOT AT 6 SECONDS, BECOMING S 2 FT AT
6 SECONDS AND E 1 FOOT AT 2 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT, BUILDING TO 3 TO 5 FT AFTER MIDNIGHT.
WAVE DETAIL: SE 2 FT AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS,
BECOMING S 3 FT AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS. PATCHY
FOG AFTER MIDNIGHT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 4 TO 6 FT. WAVE DETAIL: SE
4 FT AT 6 SECONDS. SHOWERS. PATCHY FOG IN THE MORNING.
MON NIGHT
NW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SE
4 FT AT 7 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
TUE AND TUE NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: SE 3 FT AT 6 SECONDS.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
THU
SW WINDS AROUND 10 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS.
THU NIGHT
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ230-161500-
BOSTON HARBOR-
1003 PM EDT SAT AUG 15 2026
OVERNIGHT
SW WINDS AROUND 5 KT, BECOMING NW. WAVES 1 FOOT OR
LESS.
SUN
N WINDS AROUND 5 KT, BECOMING E IN THE AFTERNOON. WAVES
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON.
SUN NIGHT
S WINDS 10 TO 15 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS AFTER MIDNIGHT.
MON
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES AROUND
2 FT. SHOWERS.
MON NIGHT
NE WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS. A CHANCE OF SHOWERS IN THE EVENING.
TUE AND TUE NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
WED
S WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
WED NIGHT AND THU
SW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS. A
CHANCE OF SHOWERS.
THU NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS. A CHANCE
OF SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ236-161500-
NARRAGANSETT BAY-
1003 PM EDT SAT AUG 15 2026
OVERNIGHT
S WINDS AROUND 5 KT, BECOMING NW. WAVES 1 FOOT OR
LESS.
SUN
N WINDS AROUND 5 KT, BECOMING S 10 TO 15 KT IN THE
AFTERNOON. WAVES 1 FOOT OR LESS, THEN AROUND 2 FT IN THE
AFTERNOON.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. WAVES 2 TO 4 FT. SHOWERS LIKELY.
PATCHY FOG IN THE MORNING.
MON NIGHT
NW WINDS 5 TO 10 KT. WAVES 2 TO 3 FT. A CHANCE OF
SHOWERS IN THE EVENING.
TUE AND TUE NIGHT
W WINDS 5 TO 10 KT. WAVES 2 TO 3 FT.
WED AND WED NIGHT
SW WINDS 10 TO 15 KT, DIMINISHING TO 5 TO
10 KT. WAVES AROUND 2 FT.
THU
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS.
THU NIGHT
NW WINDS 5 TO 10 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ280-161500-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
1003 PM EDT SAT AUG 15 2026
OVERNIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: N
1 FOOT AT 4 SECONDS AND SE 1 FOOT AT 10 SECONDS.
SUN
NE WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND N 1 FOOT AT
3 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 4 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND N 1 FOOT AT
3 SECONDS.
MON
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT. WAVE DETAIL: SE 4 FT AT 5 SECONDS AND SE 1 FOOT AT
9 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS IN
THE AFTERNOON.
MON NIGHT
SE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING NE AFTER MIDNIGHT. SEAS 4 TO 5 FT. WAVE DETAIL: SE 4 FT
AT 5 SECONDS AND SE 3 FT AT 10 SECONDS. A CHANCE OF SHOWERS.
TUE
N WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SE 4 FT
AT 7 SECONDS AND W 2 FT AT 7 SECONDS.
TUE NIGHT
NE WINDS AROUND 5 KT, BECOMING W AFTER MIDNIGHT.
SEAS 2 TO 4 FT.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO
15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO 3 FT.
THU AND THU NIGHT
SW WINDS 10 TO 15 KT, BECOMING NW. GUSTS UP
TO 20 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ281-161500-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
1003 PM EDT SAT AUG 15 2026
OVERNIGHT
NW WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL:
W 2 FT AT 5 SECONDS AND N 1 FOOT AT 4 SECONDS.
SUN
E WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND SW 1 FOOT AT
5 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND N 1 FOOT AT
4 SECONDS.
MON
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 3 TO 5 FT, BUILDING TO 5 TO
8 FT IN THE AFTERNOON. WAVE DETAIL: S 3 FT AT 4 SECONDS AND NE
1 FOOT AT 3 SECONDS, BECOMING SE 4 FT AT 5 SECONDS AND SE 1 FOOT
AT 10 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS
LIKELY IN THE AFTERNOON.
MON NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT, BECOMING
W AFTER MIDNIGHT. SEAS 5 TO 8 FT, SUBSIDING TO 5 TO 6 FT AFTER
MIDNIGHT. WAVE DETAIL: S 5 FT AT 6 SECONDS AND SE 5 FT AT
10 SECONDS, BECOMING SE 6 FT AT 6 SECONDS. SHOWERS LIKELY, MAINLY
IN THE EVENING.
TUE
N WINDS 5 TO 10 KT. SEAS 4 TO 6 FT. WAVE DETAIL: SW 6 FT
AT 7 SECONDS AND NE 2 FT AT 5 SECONDS.
TUE NIGHT
N WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
3 TO 4 FT.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT. SEAS
2 TO 3 FT.
THU AND THU NIGHT
SW WINDS AROUND 10 KT, BECOMING NW. GUSTS UP
TO 20 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ282-161500-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
1003 PM EDT SAT AUG 15 2026
OVERNIGHT
NE WINDS AROUND 5 KT, BECOMING NW. SEAS AROUND 2 FT.
WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND S 1 FOOT AT 5 SECONDS.
SUN
NE WINDS AROUND 5 KT, BECOMING SE IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 6 SECONDS AND N 1 FOOT AT
4 SECONDS.
SUN NIGHT
S WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: S
3 FT AT 4 SECONDS AND N 1 FOOT AT 4 SECONDS.
MON
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO
7 FT, BUILDING TO 7 TO 9 FT IN THE AFTERNOON. WAVE DETAIL: S 4 FT
AT 5 SECONDS AND NE 1 FOOT AT 3 SECONDS, BECOMING S 6 FT AT
5 SECONDS AND SE 3 FT AT 10 SECONDS. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS IN THE AFTERNOON.
MON NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT,
BECOMING NW AROUND 10 KT AFTER MIDNIGHT. SEAS 5 TO 8 FT,
SUBSIDING TO 5 TO 6 FT AFTER MIDNIGHT. WAVE DETAIL: S 7 FT AT
8 SECONDS AND SE 1 FOOT AT 4 SECONDS, BECOMING S 6 FT AT
7 SECONDS AND E 1 FOOT AT 3 SECONDS. A CHANCE OF SHOWERS IN THE
EVENING.
TUE
NW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S 5 FT
AT 7 SECONDS AND NE 1 FOOT AT 3 SECONDS.
TUE NIGHT
NW WINDS AROUND 5 KT. SEAS 2 TO 4 FT.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
THU
SW WINDS AROUND 10 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS.
THU NIGHT
NW WINDS AROUND 10 KT. SEAS AROUND 3 FT. A CHANCE OF
SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ283-161500-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
1003 PM EDT SAT AUG 15 2026
OVERNIGHT
SE WINDS AROUND 5 KT, BECOMING SW. SEAS AROUND 2 FT.
WAVE DETAIL: NE 1 FOOT AT 3 SECONDS AND S 1 FOOT AT 6 SECONDS.
SUN
SW WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON. WAVE DETAIL:
NE 1 FOOT AT 3 SECONDS AND S 1 FOOT AT 6 SECONDS, BECOMING S 2 FT
AT 6 SECONDS AND NE 1 FOOT AT 2 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT WITH
GUSTS UP TO 25 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT, BUILDING TO
4 TO 6 FT AFTER MIDNIGHT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND SE
1 FOOT AT 9 SECONDS, BECOMING S 3 FT AT 5 SECONDS AND SE 1 FOOT
AT 9 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
S WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS 6 TO
9 FT. WAVE DETAIL: S 6 FT AT 6 SECONDS AND SE 4 FT AT 10 SECONDS.
SHOWERS LIKELY.
MON NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NW AFTER MIDNIGHT. SEAS 4 TO 6 FT. WAVE DETAIL: SE 5 FT AT
7 SECONDS.
TUE
N WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SW 5 FT
AT 7 SECONDS AND E 1 FOOT AT 5 SECONDS.
TUE NIGHT
W WINDS AROUND 5 KT. SEAS 2 TO 3 FT.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO
15 KT. SEAS 2 TO 3 FT.
THU AND THU NIGHT
SW WINDS 10 TO 15 KT, BECOMING NW. SEAS
AROUND 3 FT. A CHANCE OF SHOWERS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
FOR THE LATEST UPDATES...PLEASE VISIT OUR WEBPAGE AT
WWW.WEATHER.GOV/BOSTON
YOU CAN FOLLOW US ON FACEBOOK AT
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.BOSTON.GOV
YOU CAN FOLLOW US ON TWITTER AT
@NWSBOSTON
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page