660
FZUS51 KBOX 151404
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1004 AM EDT SAT AUG 15 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-160300-
1004 AM EDT SAT AUG 15 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
HIGH PRESSURE SETTLES ACROSS THE NEW ENGLAND WATERS THIS WEEKEND,
LEADING TO TRANQUIL BOATING CONDITIONS. A PROGRESSIVE SYSTEM BRINGS
UNSETTLED WEATHER SUNDAY NIGHT INTO MONDAY, WITH THE POTENTIAL FOR
GUSTY WINDS AND BUILDING SEAS THAT MAY WARRANT SMALL CRAFT
ADVISORIES. HIGH PRESSURE RETURNS TUESDAY THROUGH THE MIDDLE OF NEXT
WEEK.
ANZ250-160300-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
1004 AM EDT SAT AUG 15 2026
THIS AFTERNOON
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: NW 1 FOOT AT 3 SECONDS AND SE 1 FOOT AT 10 SECONDS.
TONIGHT
S WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: S 1 FOOT AT 2 SECONDS AND NE 1 FOOT
AT 4 SECONDS.
SUN
E 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 2 TO 3 FT IN
THE AFTERNOON. WAVE DETAIL: NW 1 FOOT AT 3 SECONDS AND SE 1 FOOT
AT 9 SECONDS, BECOMING S 1 FOOT AT 2 SECONDS AND N 1 FOOT AT
2 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 4 FT. WAVE DETAIL: SE 3 FT AT 4 SECONDS AND SE 1 FOOT AT
10 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
SE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. WAVE DETAIL: SE 4 FT AT 5 SECONDS AND SE 1 FOOT AT
10 SECONDS. SHOWERS LIKELY.
MON NIGHT
NE WINDS AROUND 10 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 6 SECONDS. A
CHANCE OF SHOWERS IN THE EVENING.
TUE THROUGH WED NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO
20 KT. SEAS 2 TO 4 FT.
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.
ANZ251-160300-
MASSACHUSETTS BAY AND IPSWICH BAY-
1004 AM EDT SAT AUG 15 2026
THIS AFTERNOON
N WINDS 5 TO 10 KT, BECOMING E. SEAS 1 FOOT OR
LESS. WAVE DETAIL: W 1 FOOT AT 2 SECONDS AND NE 1 FOOT AT
3 SECONDS.
TONIGHT
S WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: E 1 FOOT AT 3 SECONDS AND E 1 FOOT
AT 11 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 2 TO 3 FT
IN THE AFTERNOON. WAVE DETAIL: SW 1 FOOT AT 2 SECONDS AND NE
1 FOOT AT 3 SECONDS, BECOMING SE 1 FOOT AT 3 SECONDS AND E 1 FOOT
AT 10 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 3 SECONDS AND SE 1 FOOT AT
11 SECONDS. SHOWERS LIKELY AFTER MIDNIGHT.
MON
SE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SE 3 FT AT 5 SECONDS AND SE 2 FT AT
10 SECONDS. SHOWERS LIKELY, MAINLY IN THE MORNING.
MON NIGHT
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SE 2 FT AT 5 SECONDS AND E 2 FT AT 9 SECONDS.
TUE THROUGH WED NIGHT
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
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.
ANZ231-160300-
CAPE COD BAY-
1004 AM EDT SAT AUG 15 2026
THIS AFTERNOON
N WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: N 1 FOOT AT 3 SECONDS AND SE 1 FOOT AT 12 SECONDS.
TONIGHT
SE WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND SE 1 FOOT
AT 11 SECONDS.
SUN
E 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: SW 1 FOOT AT 2 SECONDS AND N
1 FOOT AT 4 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 25 KT. SEAS
2 TO 3 FT. WAVE DETAIL: S 1 FOOT AT 2 SECONDS AND NE 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
SE WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SE 2 FT AT 4 SECONDS AND SE 2 FT AT
10 SECONDS. SHOWERS LIKELY.
MON NIGHT
NE WINDS AROUND 10 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 9 SECONDS AND
E 1 FOOT AT 4 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
TUE THROUGH WED NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
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.
ANZ254-160300-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
1004 AM EDT SAT AUG 15 2026
THIS AFTERNOON
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: W 2 FT AT 5 SECONDS AND N 1 FOOT AT 4 SECONDS.
TONIGHT
SE WINDS AROUND 5 KT, BECOMING W AROUND 5 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 4 SECONDS
AND S 1 FOOT AT 6 SECONDS.
SUN
SE WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND S 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 2 FT AT 4 SECONDS AND NE 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
SE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 3 TO
5 FT. WAVE DETAIL: SE 5 FT AT 5 SECONDS AND SE 5 FT AT
10 SECONDS. SHOWERS LIKELY.
MON NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 4 FT. WAVE DETAIL: SE 4 FT AT 8 SECONDS AND E 3 FT AT
5 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
TUE THROUGH WED NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO
20 KT. SEAS 2 TO 4 FT.
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.
ANZ255-160300-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
1004 AM EDT SAT AUG 15 2026
THIS AFTERNOON
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: NE 1 FOOT AT 3 SECONDS AND S 1 FOOT AT 5 SECONDS.
TONIGHT
SE WINDS AROUND 5 KT, BECOMING SW AFTER MIDNIGHT. SEAS
AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR LESS. WAVE DETAIL: NE
1 FOOT AT 3 SECONDS AND S 1 FOOT AT 5 SECONDS.
SUN
S WINDS 5 TO 10 KT. 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 5 SECONDS, BECOMING S 2 FT AT 5 SECONDS AND NE 1 FOOT
AT 4 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 2 TO 3 FT, BUILDING TO 3 TO
5 FT AFTER MIDNIGHT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND NE
1 FOOT AT 4 SECONDS, BECOMING S 4 FT AT 5 SECONDS AND NE 1 FOOT
AT 3 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
SE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
6 FT. WAVE DETAIL: SE 6 FT AT 7 SECONDS. SHOWERS LIKELY.
MON NIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 3 TO 5 FT. WAVE DETAIL: S 5 FT AT 8 SECONDS AND NE
2 FT AT 3 SECONDS.
TUE AND TUE NIGHT
N WINDS 10 TO 15 KT, BECOMING W AROUND 5 KT.
SEAS 2 TO 4 FT.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
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.
ANZ256-160300-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
1004 AM EDT SAT AUG 15 2026
THIS AFTERNOON
NE WINDS AROUND 10 KT, BECOMING SE. SEAS AROUND
2 FT. WAVE DETAIL: NE 2 FT AT 3 SECONDS AND S 1 FOOT AT
6 SECONDS.
TONIGHT
SW WINDS AROUND 5 KT. SEAS AROUND 2 FT IN THE EVENING,
THEN 1 FOOT OR LESS. WAVE DETAIL: E 1 FOOT AT 3 SECONDS AND S
1 FOOT AT 6 SECONDS, BECOMING SE 1 FOOT AT 4 SECONDS AND SE
1 FOOT AT 10 SECONDS.
SUN
S WINDS 5 TO 10 KT. 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 5 SECONDS AND E 1 FOOT AT
2 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
INCREASING TO 20 TO 25 KT WITH GUSTS UP TO 30 KT AFTER MIDNIGHT.
SEAS 2 TO 4 FT, BUILDING TO 4 TO 6 FT AFTER MIDNIGHT. WAVE
DETAIL: SE 3 FT AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS, BECOMING
SE 6 FT AT 5 SECONDS AND SE 1 FOOT AT 9 SECONDS. A CHANCE OF
SHOWERS AFTER MIDNIGHT.
MON
SE WINDS 20 TO 25 KT, BECOMING E 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 30 KT. SEAS 4 TO 6 FT. WAVE DETAIL: SE
6 FT AT 7 SECONDS. SHOWERS LIKELY, MAINLY IN THE MORNING.
MON NIGHT
N WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S
5 FT AT 8 SECONDS AND SW 4 FT AT 7 SECONDS.
TUE THROUGH WED NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
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.
ANZ232-160300-
NANTUCKET SOUND-
1004 AM EDT SAT AUG 15 2026
THIS AFTERNOON
NE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: NE 1 FOOT AT 2 SECONDS AND W 1 FOOT AT 5 SECONDS.
TONIGHT
SE WINDS AROUND 5 KT, BECOMING SW AFTER MIDNIGHT. 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 S
1 FOOT AT 3 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT
AT 4 SECONDS AND E 1 FOOT AT 3 SECONDS. A CHANCE OF SHOWERS AFTER
MIDNIGHT.
MON
SE WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 30 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE
4 FT AT 5 SECONDS AND SE 3 FT AT 10 SECONDS. SHOWERS LIKELY.
MON NIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT AT 4 SECONDS AND S
2 FT AT 8 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
TUE THROUGH WED NIGHT
SW WINDS 10 TO 15 KT. SEAS AROUND 2 FT.
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.
ANZ233-160300-
VINEYARD SOUND-
1004 AM EDT SAT AUG 15 2026
THIS AFTERNOON
N WINDS AROUND 5 KT, BECOMING SW. SEAS 1 FOOT
OR LESS. WAVE DETAIL: NE 1 FOOT AT 2 SECONDS AND SW 1 FOOT AT
5 SECONDS.
TONIGHT
SW WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL:
E 1 FOOT AT 2 SECONDS AND SW 1 FOOT AT 3 SECONDS.
SUN
S WINDS 5 TO 10 KT. 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 2 SECONDS AND SW 1 FOOT AT 3 SECONDS,
BECOMING SW 2 FT AT 3 SECONDS AND E 1 FOOT AT 3 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 20 TO 25 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 5 SECONDS AND E 2 FT AT 4 SECONDS. SHOWERS
LIKELY AFTER MIDNIGHT.
MON
SE WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 30 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S 5 FT
AT 8 SECONDS AND SE 3 FT AT 5 SECONDS. SHOWERS LIKELY.
MON NIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 8 SECONDS AND NE
2 FT AT 4 SECONDS.
TUE THROUGH WED NIGHT
SW WINDS 10 TO 15 KT. SEAS AROUND 2 FT.
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.
ANZ234-160300-
BUZZARDS BAY-
1004 AM EDT SAT AUG 15 2026
THIS AFTERNOON
NE WINDS AROUND 5 KT, BECOMING S. SEAS 1 FOOT
OR LESS. WAVE DETAIL: NE 1 FOOT AT 2 SECONDS AND SW 1 FOOT AT
4 SECONDS.
TONIGHT
SW WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL:
E 1 FOOT AT 3 SECONDS AND SW 1 FOOT AT 3 SECONDS.
SUN
E 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: NE 1 FOOT AT 2 SECONDS AND SW
1 FOOT AT 3 SECONDS, BECOMING E 1 FOOT AT 3 SECONDS AND SW 1 FOOT
AT 3 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 20 TO 25 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND E
2 FT AT 4 SECONDS. SHOWERS LIKELY AFTER MIDNIGHT.
MON
SE WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 30 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE
4 FT AT 6 SECONDS. SHOWERS LIKELY.
MON NIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 8 SECONDS AND NE
2 FT AT 3 SECONDS.
TUE THROUGH WED NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO
20 KT. SEAS AROUND 2 FT.
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.
ANZ235-160300-
RHODE ISLAND SOUND-
1004 AM EDT SAT AUG 15 2026
THIS AFTERNOON
NE WINDS 5 TO 10 KT, BECOMING S. SEAS AROUND
2 FT. WAVE DETAIL: NE 1 FOOT AT 2 SECONDS AND S 1 FOOT AT
6 SECONDS.
TONIGHT
SW WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: E 1 FOOT AT 2 SECONDS AND SW 1 FOOT
AT 4 SECONDS.
SUN
E WINDS AROUND 5 KT, BECOMING S WITH GUSTS UP TO 20 KT IN
THE AFTERNOON. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT IN THE
AFTERNOON. WAVE DETAIL: SE 1 FOOT AT 3 SECONDS AND SE 1 FOOT AT
9 SECONDS, BECOMING S 2 FT AT 4 SECONDS AND SE 1 FOOT AT
9 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 20 TO 25 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT, BUILDING TO 4 TO 6 FT AFTER MIDNIGHT.
WAVE DETAIL: S 3 FT AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS,
BECOMING SE 5 FT AT 5 SECONDS AND SE 1 FOOT AT 9 SECONDS. SHOWERS
LIKELY AFTER MIDNIGHT.
MON
SE WINDS 20 TO 25 KT, BECOMING E 15 TO 20 KT IN THE
AFTERNOON. SEAS 4 TO 6 FT. WAVE DETAIL: S 6 FT AT 8 SECONDS AND
SE 4 FT AT 5 SECONDS. SHOWERS LIKELY, MAINLY IN THE MORNING.
MON NIGHT
NE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT. WAVE DETAIL: S
4 FT AT 8 SECONDS AND SW 3 FT AT 7 SECONDS.
TUE THROUGH WED NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
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.
ANZ237-160300-
BLOCK ISLAND SOUND-
1004 AM EDT SAT AUG 15 2026
THIS AFTERNOON
NE WINDS 5 TO 10 KT, BECOMING S. SEAS AROUND
2 FT. WAVE DETAIL: NE 1 FOOT AT 3 SECONDS AND S 1 FOOT AT
6 SECONDS.
TONIGHT
SW WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. 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 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 S 1 FOOT AT
6 SECONDS, BECOMING S 2 FT AT 6 SECONDS AND SE 1 FOOT AT
2 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. 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 SE 5 FT AT 5 SECONDS AND SE 1 FOOT
AT 9 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS
LIKELY AFTER MIDNIGHT.
MON
SE WINDS 15 TO 20 KT, BECOMING E 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 4 TO 6 FT. WAVE DETAIL: S 6 FT
AT 8 SECONDS AND SE 4 FT AT 5 SECONDS. SHOWERS LIKELY, MAINLY IN
THE MORNING.
MON NIGHT
N WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE
4 FT AT 6 SECONDS.
TUE THROUGH WED NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
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.
ANZ230-160300-
BOSTON HARBOR-
1004 AM EDT SAT AUG 15 2026
THIS AFTERNOON
N WINDS AROUND 5 KT, BECOMING E 10 TO 15 KT.
WAVES 1 FOOT OR LESS.
TONIGHT
S WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
SUN
NE WINDS AROUND 5 KT, BECOMING SE IN THE AFTERNOON. WAVES
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES
AROUND 2 FT. SHOWERS LIKELY AFTER MIDNIGHT.
MON
SE WINDS 10 TO 15 KT, BECOMING E IN THE AFTERNOON. GUSTS
UP TO 20 KT. WAVES 2 TO 3 FT. SHOWERS LIKELY.
MON NIGHT
NE WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT.
WAVES AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR LESS.
TUE THROUGH WED NIGHT
S WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
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.
ANZ236-160300-
NARRAGANSETT BAY-
1004 AM EDT SAT AUG 15 2026
THIS AFTERNOON
N WINDS AROUND 5 KT, BECOMING S. WAVES 1 FOOT
OR LESS.
TONIGHT
SW WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
SUN
NE WINDS AROUND 5 KT, BECOMING S 10 TO 15 KT WITH GUSTS UP
TO 20 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. GUSTS UP TO 25 KT. WAVES 2 TO 4 FT. A CHANCE OF SHOWERS
IN THE EVENING, THEN SHOWERS LIKELY AFTER MIDNIGHT.
MON
SE WINDS 15 TO 20 KT, BECOMING E 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. WAVES 2 TO 4 FT. SHOWERS LIKELY,
MAINLY IN THE MORNING.
MON NIGHT
N WINDS 5 TO 10 KT. WAVES 2 TO 3 FT.
TUE THROUGH WED NIGHT
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
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.
ANZ280-160300-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
1004 AM EDT SAT AUG 15 2026
THIS AFTERNOON
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: N 2 FT AT 4 SECONDS AND SE 1 FOOT AT 10 SECONDS.
TONIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: NW
1 FOOT AT 4 SECONDS AND SE 1 FOOT AT 10 SECONDS.
SUN
NE WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT WITH GUSTS UP
TO 20 KT 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, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 2 TO 3 FT, BUILDING TO 3 TO
5 FT AFTER MIDNIGHT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND N
1 FOOT AT 3 SECONDS, BECOMING SE 3 FT AT 4 SECONDS AND SE 1 FOOT
AT 9 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
SE WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS 3 TO
5 FT. WAVE DETAIL: SE 5 FT AT 6 SECONDS AND SE 5 FT AT
10 SECONDS. SHOWERS LIKELY.
MON NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 4 FT. WAVE DETAIL: SE 4 FT AT 6 SECONDS. A CHANCE OF SHOWERS
IN THE EVENING.
TUE THROUGH WED NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO
20 KT. SEAS 3 TO 5 FT.
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.
ANZ281-160300-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
1004 AM EDT SAT AUG 15 2026
THIS AFTERNOON
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: N 2 FT AT 5 SECONDS AND SE 1 FOOT AT 10 SECONDS.
TONIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: NW
2 FT AT 5 SECONDS AND SE 1 FOOT AT 10 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
3 SECONDS.
MON
SE WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS 3 TO
5 FT. WAVE DETAIL: S 5 FT AT 9 SECONDS AND E 3 FT AT 4 SECONDS.
SHOWERS.
MON NIGHT
E WINDS 10 TO 15 KT, BECOMING NE AFTER MIDNIGHT.
GUSTS UP TO 25 KT. SEAS 4 TO 6 FT. WAVE DETAIL: S 6 FT AT
8 SECONDS AND SW 5 FT AT 8 SECONDS. A CHANCE OF SHOWERS IN THE
EVENING.
TUE
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 4 TO
6 FT.
TUE NIGHT
NW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT. SEAS
2 TO 3 FT.
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.
ANZ282-160300-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
1004 AM EDT SAT AUG 15 2026
THIS AFTERNOON
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: N 2 FT AT 4 SECONDS AND S 1 FOOT AT 6 SECONDS.
TONIGHT
NE WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL:
NE 1 FOOT AT 4 SECONDS AND S 1 FOOT AT 5 SECONDS.
SUN
E WINDS AROUND 5 KT, BECOMING SE IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: NE 1 FOOT AT 4 SECONDS AND S 1 FOOT AT
6 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 4 FT. WAVE DETAIL: S
4 FT AT 5 SECONDS AND NE 1 FOOT AT 4 SECONDS. A CHANCE OF SHOWERS
AFTER MIDNIGHT.
MON
S WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 3 TO
5 FT. WAVE DETAIL: S 5 FT AT 8 SECONDS AND E 3 FT AT 4 SECONDS.
SHOWERS.
MON NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING N AFTER MIDNIGHT. SEAS 4 TO 5 FT. WAVE DETAIL: S 5 FT AT
8 SECONDS AND N 2 FT AT 4 SECONDS. A CHANCE OF SHOWERS IN THE
EVENING.
TUE AND TUE NIGHT
N WINDS 10 TO 15 KT, BECOMING NW AROUND
5 KT. SEAS 3 TO 5 FT.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT.
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.
ANZ283-160300-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
1004 AM EDT SAT AUG 15 2026
THIS AFTERNOON
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: N 2 FT AT 3 SECONDS AND S 1 FOOT AT 6 SECONDS.
TONIGHT
SE WINDS AROUND 5 KT, BECOMING S AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: NE 1 FOOT AT 3 SECONDS AND S 1 FOOT AT
6 SECONDS.
SUN
S WINDS 5 TO 10 KT. 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 SE 1 FOOT
AT 9 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
INCREASING TO 20 TO 25 KT WITH GUSTS UP TO 30 KT AFTER MIDNIGHT.
SEAS 2 TO 3 FT, BUILDING TO 3 TO 5 FT AFTER MIDNIGHT. WAVE
DETAIL: S 3 FT AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS, BECOMING
S 5 FT AT 6 SECONDS AND SE 2 FT AT 9 SECONDS. A CHANCE OF SHOWERS
AFTER MIDNIGHT.
MON
S WINDS 20 TO 25 KT, BECOMING SE 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 30 KT. SEAS 5 TO 7 FT. WAVE DETAIL: S 7 FT
AT 7 SECONDS. SHOWERS LIKELY, MAINLY IN THE MORNING.
MON NIGHT
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 3 TO 5 FT. WAVE DETAIL: S 5 FT AT 8 SECONDS AND NE
3 FT AT 6 SECONDS.
TUE THROUGH WED NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
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.
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