616
FZUS51 KBOX 150503
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
103 AM EDT SAT AUG 15 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-151800-
103 AM EDT SAT AUG 15 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
HIGH PRES BUILDS OVER THE WATERS THIS WEEKEND, LEADING TO CALMER
BOATING CONDITIONS. NEXT SYSTEM SUNDAY NIGHT BRINGS GUSTY WINDS AND
BUILDING SEAS THAT MAY WARRANT SMALL CRAFT ADVISORIES. HIGH PRES
RETURNS TUE THROUGH THE MIDDLE OF NEXT WEEK.
ANZ250-151800-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
103 AM EDT SAT AUG 15 2026
REST OF TONIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: NW 1 FOOT AT 3 SECONDS AND E 1 FOOT AT 10 SECONDS.
SAT
N WINDS 5 TO 10 KT, BECOMING NE IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: NW 1 FOOT AT 3 SECONDS AND NE 1 FOOT AT
9 SECONDS.
SAT NIGHT
S WINDS AROUND 5 KT, BECOMING W AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: S 1 FOOT AT 2 SECONDS AND NE 1 FOOT
AT 7 SECONDS.
SUN
SE 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: NW 1 FOOT AT 2 SECONDS AND E
1 FOOT AT 7 SECONDS, BECOMING S 2 FT AT 3 SECONDS AND E 1 FOOT AT
8 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 4 FT. WAVE DETAIL: S 4 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 25 KT. SEAS 3 TO
5 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS AND SE 4 FT 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. 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.
ANZ251-151800-
MASSACHUSETTS BAY AND IPSWICH BAY-
103 AM EDT SAT AUG 15 2026
REST OF TONIGHT
N WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: W 1 FOOT AT 2 SECONDS AND NE 1 FOOT AT 6 SECONDS.
SAT
N WINDS AROUND 5 KT, BECOMING E IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: W 1 FOOT AT 2 SECONDS AND NE 1 FOOT
AT 5 SECONDS.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: SE 1 FOOT AT 2 SECONDS AND NE 1 FOOT
AT 6 SECONDS.
SUN
E 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 6 SECONDS, BECOMING SE 2 FT 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: S 3 FT AT 4 SECONDS AND E 1 FOOT AT
10 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 3 FT AT
10 SECONDS. SHOWERS LIKELY, MAINLY IN THE MORNING.
MON NIGHT
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
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.
ANZ231-151800-
CAPE COD BAY-
103 AM EDT SAT AUG 15 2026
REST OF TONIGHT
N WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: N 1 FOOT AT 3 SECONDS AND NE 1 FOOT AT 8 SECONDS.
SAT
N WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL: N
1 FOOT AT 4 SECONDS.
SAT NIGHT
SE WINDS AROUND 5 KT, BECOMING SW AROUND 5 KT AFTER
MIDNIGHT. SEAS 1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT
4 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: NW 1 FOOT AT 4 SECONDS,
BECOMING S 1 FOOT AT 3 SECONDS AND NE 1 FOOT AT 4 SECONDS.
SUN NIGHT
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. 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. SHOWERS LIKELY.
MON NIGHT
NE WINDS AROUND 10 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS AROUND 2 FT. 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.
ANZ254-151800-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
103 AM EDT SAT AUG 15 2026
REST OF TONIGHT
N WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: NW 1 FOOT AT 4 SECONDS AND E 1 FOOT AT 9 SECONDS.
SAT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: W 2 FT
AT 5 SECONDS AND NE 2 FT AT 7 SECONDS.
SAT NIGHT
NE WINDS AROUND 5 KT, BECOMING W AROUND 5 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT AT 6 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
E 1 FOOT AT 7 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 SE 1 FOOT AT
8 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: S 5 FT AT 5 SECONDS AND SE 3 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. 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.
ANZ255-151800-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
103 AM EDT SAT AUG 15 2026
REST OF TONIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: W 1 FOOT AT 4 SECONDS AND E 1 FOOT AT 10 SECONDS.
SAT
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: NE
2 FT AT 6 SECONDS AND SW 1 FOOT AT 5 SECONDS.
SAT NIGHT
E WINDS AROUND 5 KT, BECOMING S AROUND 5 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR LESS.
WAVE DETAIL: SE 1 FOOT AT 6 SECONDS, BECOMING SW 1 FOOT AT
5 SECONDS AND E 1 FOOT AT 8 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: SW 1 FOOT AT 5 SECONDS AND E 1 FOOT AT
8 SECONDS, BECOMING S 2 FT AT 4 SECONDS AND SE 1 FOOT AT
8 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
3 TO 5 FT AFTER MIDNIGHT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND SE
1 FOOT AT 8 SECONDS, BECOMING S 5 FT AT 5 SECONDS AND SE 1 FOOT
AT 9 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: S 6 FT AT 6 SECONDS AND SE 4 FT AT 9 SECONDS.
SHOWERS LIKELY.
MON NIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 3 TO 5 FT.
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.
ANZ256-151800-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
103 AM EDT SAT AUG 15 2026
REST OF TONIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: W 2 FT AT 5 SECONDS AND E 2 FT AT 10 SECONDS.
SAT
NE WINDS AROUND 10 KT, BECOMING SE IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: NE 2 FT AT 5 SECONDS AND SW 1 FOOT AT
6 SECONDS.
SAT NIGHT
SW WINDS AROUND 5 KT. SEAS AROUND 2 FT IN THE
EVENING, THEN 1 FOOT OR LESS. WAVE DETAIL: S 1 FOOT AT 5 SECONDS
AND SE 1 FOOT AT 8 SECONDS, BECOMING SW 1 FOOT AT 4 SECONDS AND
SE 1 FOOT AT 9 SECONDS.
SUN
S WINDS AROUND 5 KT, INCREASING TO 10 TO 15 KT IN THE
AFTERNOON. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT IN THE
AFTERNOON. WAVE DETAIL: SW 1 FOOT AT 4 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 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: S 3 FT AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS, BECOMING
S 6 FT AT 6 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: S 6 FT
AT 7 SECONDS AND SE 5 FT AT 10 SECONDS. SHOWERS LIKELY, MAINLY IN
THE MORNING.
MON NIGHT
N WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
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.
ANZ232-151800-
NANTUCKET SOUND-
103 AM EDT SAT AUG 15 2026
REST OF TONIGHT
N WINDS AROUND 10 KT. SEAS 1 FOOT OR LESS.
WAVE DETAIL: NW 1 FOOT AT 3 SECONDS AND E 1 FOOT AT 12 SECONDS.
SAT
NE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL: W
1 FOOT AT 4 SECONDS AND NE 1 FOOT AT 4 SECONDS.
SAT NIGHT
SE WINDS AROUND 5 KT, BECOMING SW AFTER MIDNIGHT.
SEAS 1 FOOT OR LESS. WAVE DETAIL: S 1 FOOT AT 4 SECONDS AND NE
1 FOOT AT 7 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: SW 1 FOOT AT 2 SECONDS AND E
1 FOOT AT 8 SECONDS, BECOMING S 2 FT AT 3 SECONDS AND E 1 FOOT AT
8 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 4 SECONDS AND SE 2 FT AT 10 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: S 4 FT
AT 5 SECONDS AND SE 2 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. 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.
ANZ233-151800-
VINEYARD SOUND-
103 AM EDT SAT AUG 15 2026
REST OF TONIGHT
N WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: NW 1 FOOT AT 4 SECONDS AND E 1 FOOT AT 11 SECONDS.
SAT
NE WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: SW 1 FOOT AT 4 SECONDS AND NE 1 FOOT
AT 4 SECONDS.
SAT NIGHT
S WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: SW 1 FOOT AT 3 SECONDS AND E 1 FOOT AT 9 SECONDS.
SUN
S WINDS AROUND 5 KT, INCREASING TO 10 TO 15 KT IN THE
AFTERNOON. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT IN THE
AFTERNOON. WAVE DETAIL: SW 1 FOOT AT 3 SECONDS AND SE 1 FOOT AT
9 SECONDS, BECOMING SW 2 FT AT 3 SECONDS AND SE 1 FOOT AT
10 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 3 FT AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS,
BECOMING S 5 FT AT 6 SECONDS AND SE 3 FT AT 11 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 7 SECONDS AND SE 4 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.
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.
ANZ234-151800-
BUZZARDS BAY-
103 AM EDT SAT AUG 15 2026
REST OF TONIGHT
N WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: NW 1 FOOT AT 3 SECONDS AND E 1 FOOT AT 9 SECONDS.
SAT
N WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 2 SECONDS AND SW 1 FOOT
AT 3 SECONDS.
SAT NIGHT
S WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: SW 1 FOOT AT 3 SECONDS AND E 1 FOOT AT 8 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: SW 1 FOOT AT 3 SECONDS AND E
1 FOOT AT 8 SECONDS, BECOMING SW 2 FT AT 3 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 4 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS AND SE
3 FT AT 11 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: S 4 FT
AT 6 SECONDS AND SE 4 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.
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.
ANZ235-151800-
RHODE ISLAND SOUND-
103 AM EDT SAT AUG 15 2026
REST OF TONIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: W 1 FOOT AT 4 SECONDS AND SE 1 FOOT AT 10 SECONDS.
SAT
NE WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: NE 2 FT AT 5 SECONDS AND S 1 FOOT AT
6 SECONDS.
SAT NIGHT
SW WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: SW 1 FOOT AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS.
SUN
SE 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: S 1 FOOT AT 4 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 S 6 FT AT 6 SECONDS AND SE 5 FT AT 11 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 7 SECONDS AND
SE 5 FT AT 9 SECONDS. SHOWERS LIKELY, MAINLY IN THE MORNING.
MON NIGHT
NE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
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.
ANZ237-151800-
BLOCK ISLAND SOUND-
103 AM EDT SAT AUG 15 2026
REST OF TONIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SW 1 FOOT AT 5 SECONDS AND E 1 FOOT AT 10 SECONDS.
SAT
NE WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: NE 1 FOOT AT 5 SECONDS AND S 1 FOOT AT
6 SECONDS.
SAT NIGHT
SW WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 1 FOOT OR LESS. WAVE DETAIL: SW 1 FOOT AT 4 SECONDS AND SE
1 FOOT AT 8 SECONDS.
SUN
E WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON. WAVE DETAIL:
SE 1 FOOT AT 5 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 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 SE
1 FOOT AT 9 SECONDS, BECOMING S 5 FT AT 6 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 5 FT
AT 6 SECONDS. SHOWERS LIKELY, MAINLY IN THE MORNING.
MON NIGHT
N WINDS 5 TO 10 KT. SEAS 2 TO 4 FT.
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.
ANZ230-151800-
BOSTON HARBOR-
103 AM EDT SAT AUG 15 2026
REST OF TONIGHT
N WINDS AROUND 5 KT. WAVES 1 FOOT OR LESS.
SAT
N WINDS AROUND 5 KT, BECOMING E IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
SAT NIGHT
SE WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS.
SUN
NE WINDS AROUND 5 KT, BECOMING SE 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 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.
ANZ236-151800-
NARRAGANSETT BAY-
103 AM EDT SAT AUG 15 2026
REST OF TONIGHT
N WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
SAT
N WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
SAT NIGHT
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 WITH
GUSTS UP TO 25 KT AFTER MIDNIGHT. 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 10 TO 15 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.
ANZ280-151800-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
103 AM EDT SAT AUG 15 2026
REST OF TONIGHT
N WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: NW 2 FT AT 3 SECONDS AND SE 1 FOOT AT 11 SECONDS.
SAT
N WINDS 5 TO 10 KT, BECOMING NW IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: N 2 FT AT 4 SECONDS AND SE 1 FOOT AT
10 SECONDS.
SAT NIGHT
W WINDS AROUND 5 KT, INCREASING TO 5 TO 10 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: NW 1 FOOT AT 4 SECONDS
AND SE 1 FOOT AT 10 SECONDS.
SUN
S WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS AND SE 1 FOOT
AT 9 SECONDS.
SUN NIGHT
S WINDS 15 TO 20 KT WITH 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 SE 1 FOOT AT 9 SECONDS, BECOMING S 5 FT AT
5 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: S 5 FT AT 6 SECONDS AND SE 4 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. 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.
ANZ281-151800-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
103 AM EDT SAT AUG 15 2026
REST OF TONIGHT
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: NW 2 FT AT 5 SECONDS AND E 1 FOOT AT 10 SECONDS.
SAT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: NW 2 FT
AT 5 SECONDS AND E 2 FT AT 10 SECONDS.
SAT NIGHT
N WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 2 FT AT 5 SECONDS AND NE 2 FT AT 7 SECONDS.
SUN
E WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: W 1 FOOT AT 5 SECONDS AND SE 1 FOOT AT
9 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 SE 1 FOOT AT
9 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 5 SECONDS AND SE 2 FT AT 10 SECONDS.
SHOWERS.
MON NIGHT
E WINDS 10 TO 15 KT, BECOMING NE AFTER MIDNIGHT.
GUSTS UP TO 25 KT. SEAS 4 TO 6 FT. 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.
ANZ282-151800-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
103 AM EDT SAT AUG 15 2026
REST OF TONIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SW 1 FOOT AT 5 SECONDS AND E 1 FOOT AT 9 SECONDS.
SAT
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: NE
2 FT AT 8 SECONDS AND SW 1 FOOT AT 5 SECONDS.
SAT NIGHT
NE WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL:
NE 2 FT AT 7 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: S 1 FOOT AT 5 SECONDS AND E 1 FOOT AT
7 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
3 FT AT 4 SECONDS AND SE 1 FOOT AT 8 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 5 SECONDS AND SE 4 FT AT 10 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. 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.
ANZ283-151800-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
103 AM EDT SAT AUG 15 2026
REST OF TONIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: NE 2 FT AT 9 SECONDS AND SW 1 FOOT AT 6 SECONDS.
SAT
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: NE
2 FT AT 6 SECONDS AND S 1 FOOT AT 6 SECONDS.
SAT NIGHT
SE WINDS AROUND 5 KT, BECOMING S AROUND 5 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: E 2 FT AT 7 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: SE 1 FOOT AT 7 SECONDS, BECOMING
SE 2 FT AT 7 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 8 SECONDS, BECOMING
S 5 FT AT 5 SECONDS AND SE 1 FOOT 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 6 FT
AT 6 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.
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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