308
FZUS51 KBOX 111105
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
705 AM EDT TUE AUG 11 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-120000-
705 AM EDT TUE AUG 11 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
WEAK HIGH PRESSURE OVER THE REGION TODAY FOLLOWED BY THE PASSAGE OF
A COLD FRONT OVERNIGHT. THE NEXT FRONTAL PASSAGE SOMETIME WEDNESDAY
NIGHT INTO THURSDAY EVENING BRINGING SCATTERED SHOWERS AND STORMS. A
RIDGE OF HIGH PRES THEN BUILDS IN FROM THE WEST FRIDAY INTO THE
WEEKEND.
ANZ250-120000-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
705 AM EDT TUE AUG 11 2026
TODAY
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: E
1 FOOT AT 2 SECONDS AND SW 1 FOOT AT 4 SECONDS.
TONIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: NW
1 FOOT AT 3 SECONDS AND S 1 FOOT AT 6 SECONDS.
WED
NW WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: NW 1 FOOT AT 3 SECONDS AND S 1 FOOT AT
6 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 2 FT AT 4 SECONDS AND N 1 FOOT AT 3 SECONDS.
THU
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: E
1 FOOT AT 2 SECONDS AND SW 1 FOOT AT 3 SECONDS. A CHANCE OF
SHOWERS IN THE AFTERNOON.
THU NIGHT
SW WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: E 1 FOOT AT 3 SECONDS AND SW 1 FOOT AT 3 SECONDS. A
CHANCE OF SHOWERS IN THE EVENING.
FRI THROUGH SAT NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO
25 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.
ANZ251-120000-
MASSACHUSETTS BAY AND IPSWICH BAY-
705 AM EDT TUE AUG 11 2026
TODAY
W WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL: W
1 FOOT AT 2 SECONDS AND S 1 FOOT AT 3 SECONDS.
TONIGHT
NW WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL:
NW 1 FOOT AT 2 SECONDS AND S 1 FOOT AT 4 SECONDS.
WED
NW WINDS AROUND 5 KT, BECOMING SE IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: NW 1 FOOT AT 2 SECONDS AND S 1 FOOT
AT 4 SECONDS.
WED NIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: SE 1 FOOT AT 2 SECONDS AND NE 1 FOOT
AT 2 SECONDS.
THU
SW WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL: SE
1 FOOT AT 2 SECONDS AND W 1 FOOT AT 2 SECONDS. A CHANCE OF
SHOWERS IN THE AFTERNOON.
THU NIGHT
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. A
CHANCE OF SHOWERS IN THE EVENING.
FRI THROUGH SAT NIGHT
W 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.
ANZ231-120000-
CAPE COD BAY-
705 AM EDT TUE AUG 11 2026
TODAY
W 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.
TONIGHT
NW WINDS AROUND 5 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: N 1 FOOT AT 2 SECONDS AND W 1 FOOT AT 2 SECONDS.
WED
NW WINDS AROUND 5 KT, BECOMING E IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 2 SECONDS AND NW 1 FOOT
AT 3 SECONDS.
WED NIGHT
SW WINDS AROUND 5 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: S 1 FOOT AT 2 SECONDS AND N 1 FOOT AT 3 SECONDS.
THU
SW WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT
IN THE AFTERNOON. WAVE DETAIL: SW 1 FOOT AT 2 SECONDS AND NE
1 FOOT AT 3 SECONDS, BECOMING SW 1 FOOT AT 2 SECONDS AND E 1 FOOT
AT 3 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
THU NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT IN THE
EVENING, THEN 1 FOOT OR LESS. WAVE DETAIL: SW 1 FOOT AT 2 SECONDS
AND E 1 FOOT AT 3 SECONDS, BECOMING E 1 FOOT AT 2 SECONDS AND SW
1 FOOT AT 3 SECONDS. A CHANCE OF SHOWERS.
FRI THROUGH SAT NIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP TO
25 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.
ANZ254-120000-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
705 AM EDT TUE AUG 11 2026
TODAY
W WINDS 10 TO 15 KT. GUSTS UP TO 20 KT THIS AFTERNOON.
SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 6 SECONDS AND W 1 FOOT AT
3 SECONDS.
TONIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NW 5 TO 10 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: NW
2 FT AT 4 SECONDS AND S 2 FT AT 6 SECONDS.
WED
N WINDS AROUND 5 KT, BECOMING NE IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND S 1 FOOT AT
6 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
N 1 FOOT AT 3 SECONDS AND NW 1 FOOT AT 3 SECONDS.
THU
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT
AT 5 SECONDS AND NW 1 FOOT AT 3 SECONDS.
THU NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING W AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT
AT 4 SECONDS AND E 1 FOOT AT 3 SECONDS. A CHANCE OF SHOWERS.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. A CHANCE OF SHOWERS.
FRI NIGHT THROUGH SAT NIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP
TO 25 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.
ANZ255-120000-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
705 AM EDT TUE AUG 11 2026
TODAY
W WINDS 10 TO 15 KT. GUSTS UP TO 20 KT THIS AFTERNOON.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND E 1 FOOT AT
9 SECONDS.
TONIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NW 5 TO 10 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW
2 FT AT 6 SECONDS AND SE 1 FOOT AT 9 SECONDS.
WED
N WINDS AROUND 5 KT, BECOMING E IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND N 1 FOOT AT
2 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
S 2 FT AT 7 SECONDS AND N 1 FOOT AT 2 SECONDS.
THU
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW
2 FT AT 6 SECONDS AND W 1 FOOT AT 3 SECONDS.
THU NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING W AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT
AT 5 SECONDS AND E 1 FOOT AT 6 SECONDS. A CHANCE OF SHOWERS.
FRI
W WINDS 10 TO 15 KT. SEAS 2 TO 4 FT. A CHANCE OF SHOWERS.
FRI NIGHT THROUGH SAT NIGHT
W WINDS 15 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.
ANZ256-120000-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
705 AM EDT TUE AUG 11 2026
TODAY
W WINDS 10 TO 15 KT. GUSTS UP TO 20 KT THIS AFTERNOON.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 6 SECONDS AND SE 1 FOOT
AT 9 SECONDS.
TONIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NW 5 TO 10 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT
AT 5 SECONDS AND SE 1 FOOT AT 9 SECONDS.
WED
N WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND N 1 FOOT AT
2 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
S 2 FT AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS.
THU
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW
3 FT AT 7 SECONDS AND S 1 FOOT AT 3 SECONDS.
THU NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING W AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT
AT 5 SECONDS AND SE 1 FOOT AT 8 SECONDS. A CHANCE OF SHOWERS.
FRI
W WINDS 10 TO 15 KT. SEAS AROUND 3 FT. A CHANCE OF
SHOWERS.
FRI NIGHT THROUGH SAT NIGHT
W WINDS 15 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.
ANZ232-120000-
NANTUCKET SOUND-
705 AM EDT TUE AUG 11 2026
TODAY
W WINDS 10 TO 15 KT. GUSTS UP TO 20 KT THIS AFTERNOON.
SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT AT 3 SECONDS AND S 2 FT AT
6 SECONDS.
TONIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NW 5 TO 10 KT AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: SW
2 FT AT 4 SECONDS AND N 1 FOOT AT 2 SECONDS.
WED
N WINDS AROUND 5 KT, BECOMING SE IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: NW 1 FOOT AT 2 SECONDS AND SW 1 FOOT
AT 5 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
NE 1 FOOT AT 2 SECONDS AND SW 1 FOOT AT 4 SECONDS.
THU
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH 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 3 SECONDS.
THU NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING W AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT
AT 4 SECONDS AND E 1 FOOT AT 4 SECONDS. A CHANCE OF SHOWERS.
FRI
NW WINDS 10 TO 15 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
FRI NIGHT THROUGH SAT NIGHT
W WINDS 15 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.
ANZ233-120000-
VINEYARD SOUND-
705 AM EDT TUE AUG 11 2026
TODAY
W WINDS 10 TO 15 KT. GUSTS UP TO 20 KT THIS AFTERNOON.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND SE 1 FOOT
AT 9 SECONDS.
TONIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NW AROUND 5 KT AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: SW
2 FT AT 5 SECONDS AND SE 1 FOOT AT 9 SECONDS.
WED
NE WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON. WAVE DETAIL: W
1 FOOT AT 5 SECONDS AND SE 1 FOOT AT 9 SECONDS, BECOMING NE
1 FOOT AT 4 SECONDS AND W 1 FOOT AT 6 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 1 FOOT AT 2 SECONDS AND SW 1 FOOT AT 4 SECONDS.
THU
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT
AT 4 SECONDS AND SE 1 FOOT AT 8 SECONDS.
THU NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING W AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT
AT 5 SECONDS AND SE 1 FOOT AT 6 SECONDS. A CHANCE OF SHOWERS.
FRI
W WINDS 10 TO 15 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
FRI NIGHT THROUGH SAT NIGHT
W 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.
ANZ234-120000-
BUZZARDS BAY-
705 AM EDT TUE AUG 11 2026
TODAY
W WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT WITH GUSTS
UP TO 20 KT THIS AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT
AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS.
TONIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NW AROUND 5 KT AFTER MIDNIGHT. SEAS AROUND 2 FT IN THE EVENING,
THEN 1 FOOT OR LESS. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND SE
1 FOOT AT 9 SECONDS, BECOMING SW 1 FOOT AT 5 SECONDS AND SE
1 FOOT AT 9 SECONDS.
WED
N WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 2 SECONDS AND W 1 FOOT
AT 5 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 1 FOOT AT 3 SECONDS AND SW 1 FOOT AT 4 SECONDS.
THU
SW WINDS 5 TO 10 KT, INCREASING TO 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 4 SECONDS AND SE
1 FOOT AT 8 SECONDS, BECOMING S 2 FT AT 4 SECONDS AND SE 1 FOOT
AT 8 SECONDS.
THU NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND SE
1 FOOT AT 5 SECONDS. A CHANCE OF SHOWERS.
FRI
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. A CHANCE OF SHOWERS.
FRI NIGHT THROUGH SAT NIGHT
W 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.
ANZ235-120000-
RHODE ISLAND SOUND-
705 AM EDT TUE AUG 11 2026
TODAY
W WINDS 10 TO 15 KT. GUSTS UP TO 20 KT THIS AFTERNOON.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND SE 1 FOOT
AT 9 SECONDS.
TONIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NW AROUND 5 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW
3 FT AT 5 SECONDS AND SE 1 FOOT AT 9 SECONDS.
WED
NE WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 5 SECONDS AND NW 1 FOOT AT
4 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 2 FT AT 4 SECONDS AND NE 1 FOOT AT 2 SECONDS.
THU
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: S
2 FT AT 4 SECONDS AND SE 1 FOOT AT 8 SECONDS.
THU NIGHT
W WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND SE
1 FOOT AT 6 SECONDS. A CHANCE OF SHOWERS.
FRI
W WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
FRI NIGHT THROUGH SAT NIGHT
W WINDS 15 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.
ANZ237-120000-
BLOCK ISLAND SOUND-
705 AM EDT TUE AUG 11 2026
TODAY
W WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT THIS AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT
AT 6 SECONDS AND W 1 FOOT AT 3 SECONDS.
TONIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 6 SECONDS AND W 1 FOOT AT
3 SECONDS.
WED
N WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 5 SECONDS AND NW 1 FOOT AT
4 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
W 1 FOOT AT 2 SECONDS AND S 1 FOOT AT 4 SECONDS.
THU
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH 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 8 SECONDS.
THU NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING W 5 TO 10 KT AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE
DETAIL: SW 2 FT AT 4 SECONDS AND SE 1 FOOT AT 7 SECONDS. A CHANCE
OF SHOWERS.
FRI
NW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
FRI NIGHT THROUGH SAT NIGHT
NW WINDS 10 TO 15 KT WITH 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.
ANZ230-120000-
BOSTON HARBOR-
705 AM EDT TUE AUG 11 2026
TODAY
W WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS, THEN AROUND
2 FT THIS AFTERNOON.
TONIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
WED
NW WINDS AROUND 5 KT, BECOMING SE IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
WED NIGHT
S WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
THU
SW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS, THEN AROUND
2 FT IN THE AFTERNOON. A CHANCE OF SHOWERS IN THE AFTERNOON.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS. A CHANCE
OF SHOWERS IN THE EVENING.
FRI THROUGH SAT NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO
20 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.
ANZ236-120000-
NARRAGANSETT BAY-
705 AM EDT TUE AUG 11 2026
TODAY
W WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT THIS AFTERNOON. WAVES AROUND 2 FT.
TONIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. WAVES
AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR LESS.
WED
N WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
WED NIGHT
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
THU
SW WINDS 5 TO 10 KT, INCREASING TO 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.
THU NIGHT
SW WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT.
WAVES AROUND 2 FT. A CHANCE OF SHOWERS.
FRI THROUGH SAT NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO
20 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.
ANZ280-120000-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
705 AM EDT TUE AUG 11 2026
TODAY
W WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT THIS
AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT AT 6 SECONDS AND
W 1 FOOT AT 3 SECONDS.
TONIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S
2 FT AT 6 SECONDS AND NW 1 FOOT AT 3 SECONDS.
WED
NW WINDS AROUND 5 KT, BECOMING SW AROUND 5 KT IN THE
AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 3 SECONDS
AND S 1 FOOT AT 6 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 2 FT AT 4 SECONDS AND N 1 FOOT AT 3 SECONDS.
THU
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
2 FT AT 4 SECONDS AND E 1 FOOT AT 3 SECONDS.
THU NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND E 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS.
FRI THROUGH SAT NIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO
30 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.
ANZ281-120000-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
705 AM EDT TUE AUG 11 2026
TODAY
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT
AT 6 SECONDS AND W 1 FOOT AT 3 SECONDS. PATCHY FOG THIS MORNING
WITH VSBY 1 NM OR LESS.
TONIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: W
3 FT AT 5 SECONDS AND N 1 FOOT AT 3 SECONDS.
WED
N WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
2 FT AT 5 SECONDS AND N 1 FOOT AT 3 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
2 FT AT 5 SECONDS AND N 1 FOOT AT 3 SECONDS.
THU
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT
AT 6 SECONDS AND NW 1 FOOT AT 3 SECONDS.
THU NIGHT
S WINDS 10 TO 15 KT, BECOMING W AFTER MIDNIGHT.
GUSTS UP TO 20 KT. SEAS AROUND 3 FT. WAVE DETAIL: SW 2 FT AT
6 SECONDS AND SE 1 FOOT AT 10 SECONDS. A CHANCE OF SHOWERS.
FRI
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. A CHANCE OF SHOWERS.
FRI NIGHT THROUGH SAT NIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP
TO 30 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.
ANZ282-120000-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
705 AM EDT TUE AUG 11 2026
TODAY
W WINDS 10 TO 15 KT. SEAS AROUND 3 FT. WAVE DETAIL: SW
3 FT AT 6 SECONDS AND E 1 FOOT AT 9 SECONDS.
TONIGHT
W WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 6 SECONDS AND E
1 FOOT AT 8 SECONDS. PATCHY FOG IN THE EVENING WITH VSBY 1 TO
3 NM.
WED
N WINDS AROUND 5 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT
AT 6 SECONDS AND N 1 FOOT AT 2 SECONDS.
WED NIGHT
SE WINDS AROUND 5 KT, BECOMING SW AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND N 1 FOOT AT
3 SECONDS.
THU
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT
AT 5 SECONDS AND SE 1 FOOT AT 9 SECONDS.
THU NIGHT
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE DETAIL: W
2 FT AT 6 SECONDS AND E 1 FOOT AT 3 SECONDS. A CHANCE OF SHOWERS.
FRI
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
5 FT. A CHANCE OF SHOWERS.
FRI NIGHT THROUGH SAT NIGHT
W WINDS 15 TO 20 KT. SEAS 3 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.
ANZ283-120000-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
705 AM EDT TUE AUG 11 2026
TODAY
W WINDS 10 TO 15 KT. SEAS AROUND 3 FT. WAVE DETAIL: SW
2 FT AT 6 SECONDS AND SE 1 FOOT AT 9 SECONDS.
TONIGHT
W WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 6 SECONDS AND
SE 1 FOOT AT 9 SECONDS.
WED
N WINDS AROUND 5 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT
AT 5 SECONDS AND N 1 FOOT AT 2 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
2 FT AT 7 SECONDS AND NW 1 FOOT AT 3 SECONDS.
THU
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT
AT 6 SECONDS AND E 1 FOOT AT 8 SECONDS.
THU NIGHT
W WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SW
2 FT AT 5 SECONDS AND E 1 FOOT AT 8 SECONDS. A CHANCE OF SHOWERS.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. A CHANCE OF SHOWERS.
FRI NIGHT THROUGH SAT NIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP
TO 25 KT. SEAS 3 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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