629
FZUS51 KBOX 121105
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
705 AM EDT WED AUG 12 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-130000-
705 AM EDT WED AUG 12 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
WEAK FRONTAL BOUNDARIES WILL TRAVERSE THE COASTAL WATERS THROUGH
FRIDAY, WITH LITTLE IMPACT OUTSIDE OF SCATTERED SHOWERS AND
THUNDERSTORMS. DURING THIS TIME, WINDS AND SEAS WILL REMAIN BELOW
ADVISORY CRITERIA. THIS WEEKEND, BRIEF HIGH PRESSURE BUILDS IN FROM
THE NORTHWEST, FOLLOWED BY A LOW PRESSURE SYSTEM MOVING OUT OF THE
NORTHERN GREAT LAKES LATE SUNDAY INTO MONDAY, BRINGING A RETURN TO
UNSETTLED CONDITIONS.
ANZ250-130000-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
705 AM EDT WED AUG 12 2026
TODAY
NW WINDS AROUND 5 KT, BECOMING SE THIS AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND S 1 FOOT
AT 6 SECONDS.
TONIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 2 SECONDS AND S 1 FOOT AT
4 SECONDS.
THU
SW WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
1 FOOT AT 3 SECONDS AND W 1 FOOT AT 3 SECONDS. A CHANCE OF
SHOWERS IN THE AFTERNOON.
THU NIGHT
SW WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: W 1 FOOT AT 2 SECONDS AND SE
1 FOOT AT 3 SECONDS.
FRI AND FRI NIGHT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT AT 3 SECONDS AND S 1 FOOT AT
3 SECONDS.
SAT
N WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO 4 FT.
WAVE DETAIL: N 2 FT AT 4 SECONDS AND S 1 FOOT AT 7 SECONDS.
SAT NIGHT AND SUN
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
SUN NIGHT
S WINDS 10 TO 15 KT WITH 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.
ANZ251-130000-
MASSACHUSETTS BAY AND IPSWICH BAY-
705 AM EDT WED AUG 12 2026
TODAY
NW WINDS AROUND 5 KT, BECOMING SE THIS AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 2 SECONDS AND S 1 FOOT
AT 4 SECONDS.
TONIGHT
S WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: NW 1 FOOT AT 2 SECONDS AND E 1 FOOT
AT 3 SECONDS.
THU
SW WINDS AROUND 5 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL: W
1 FOOT AT 2 SECONDS AND SE 1 FOOT AT 3 SECONDS. A CHANCE OF
SHOWERS IN THE AFTERNOON.
THU NIGHT
SW WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 1 FOOT OR LESS. WAVE DETAIL: W 1 FOOT AT 2 SECONDS AND SE
1 FOOT AT 2 SECONDS.
FRI AND FRI NIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SE 2 FT AT 10 SECONDS AND NW 1 FOOT AT 2 SECONDS.
SAT THROUGH SUN
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT AT 3 SECONDS AND S 1 FOOT
AT 5 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 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.
ANZ231-130000-
CAPE COD BAY-
705 AM EDT WED AUG 12 2026
TODAY
N WINDS AROUND 5 KT, BECOMING E THIS AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND S 1 FOOT
AT 6 SECONDS.
TONIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: S 1 FOOT AT 2 SECONDS AND N 1 FOOT
AT 3 SECONDS.
THU
SW WINDS AROUND 5 KT. SEAS 1 FOOT OR LESS, THEN AROUND
2 FT IN THE AFTERNOON. WAVE DETAIL: W 1 FOOT AT 2 SECONDS AND SE
1 FOOT AT 3 SECONDS, BECOMING E 1 FOOT AT 2 SECONDS AND SW 1 FOOT
AT 2 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
THU NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT IN THE EVENING,
THEN 1 FOOT OR LESS. WAVE DETAIL: W 1 FOOT AT 2 SECONDS AND SE
1 FOOT AT 2 SECONDS, BECOMING NW 1 FOOT AT 2 SECONDS AND SE
1 FOOT AT 3 SECONDS.
FRI AND FRI NIGHT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND S 1 FOOT
AT 5 SECONDS.
SAT THROUGH SUN
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT AT 4 SECONDS AND S 1 FOOT
AT 9 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
AROUND 2 FT. SHOWERS LIKELY.
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.
ANZ254-130000-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
705 AM EDT WED AUG 12 2026
TODAY
N WINDS AROUND 5 KT, BECOMING NE THIS AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 5 SECONDS AND N 1 FOOT AT
3 SECONDS. A SLIGHT CHANCE OF SHOWERS THIS MORNING.
TONIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 5 SECONDS AND N 1 FOOT AT
3 SECONDS. PATCHY FOG AFTER MIDNIGHT WITH VSBY 1 NM OR LESS.
THU
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT
AT 5 SECONDS AND NW 1 FOOT AT 3 SECONDS. PATCHY FOG IN THE
MORNING. A CHANCE OF SHOWERS IN THE AFTERNOON. VSBY 1 NM OR LESS
IN THE MORNING.
THU NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
2 FT AT 4 SECONDS AND W 1 FOOT AT 3 SECONDS.
FRI AND FRI NIGHT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: N 2 FT AT 3 SECONDS AND S 2 FT AT
6 SECONDS.
SAT AND SAT NIGHT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING W 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: N 2 FT AT
4 SECONDS AND S 1 FOOT AT 6 SECONDS.
SUN
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH 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.
ANZ255-130000-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
705 AM EDT WED AUG 12 2026
TODAY
NW WINDS AROUND 5 KT, BECOMING E THIS AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND N 1 FOOT AT
3 SECONDS. A SLIGHT CHANCE OF SHOWERS.
TONIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
2 FT AT 5 SECONDS AND NW 1 FOOT AT 2 SECONDS. PATCHY FOG AFTER
MIDNIGHT WITH VSBY 1 NM OR LESS.
THU
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT AT 2 SECONDS AND
SW 2 FT AT 5 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 NM OR
LESS.
THU NIGHT
W WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL:
SW 2 FT AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS.
FRI AND FRI NIGHT
N WINDS 10 TO 15 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: N 2 FT AT 4 SECONDS AND SW 2 FT AT 5 SECONDS.
SAT THROUGH SUN
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: N 2 FT AT 4 SECONDS AND S 2 FT AT
7 SECONDS.
SUN NIGHT
SW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. SHOWERS
LIKELY.
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.
ANZ256-130000-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
705 AM EDT WED AUG 12 2026
TODAY
N WINDS AROUND 5 KT, BECOMING W THIS AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND N 1 FOOT AT
2 SECONDS. A SLIGHT CHANCE OF SHOWERS THIS MORNING.
TONIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S
2 FT AT 5 SECONDS AND W 1 FOOT AT 2 SECONDS.
THU
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS AND
SE 1 FOOT AT 2 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 NM
OR LESS.
THU NIGHT
W WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW
2 FT AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS.
FRI
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT
AT 5 SECONDS AND NE 1 FOOT AT 2 SECONDS.
FRI NIGHT
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: N 2 FT AT 4 SECONDS AND S
1 FOOT AT 5 SECONDS.
SAT AND SAT NIGHT
N WINDS 10 TO 15 KT, BECOMING SW 5 TO 10 KT.
SEAS 2 TO 4 FT.
SUN
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT.
SUN NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 4 FT. SHOWERS LIKELY.
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.
ANZ232-130000-
NANTUCKET SOUND-
705 AM EDT WED AUG 12 2026
TODAY
N WINDS AROUND 5 KT, BECOMING E THIS AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 2 SECONDS AND SW 1 FOOT
AT 5 SECONDS. A SLIGHT CHANCE OF SHOWERS THIS MORNING.
TONIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: E 1 FOOT AT 2 SECONDS AND NW 1 FOOT
AT 4 SECONDS.
THU
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 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 S 1 FOOT AT
4 SECONDS, BECOMING SW 2 FT AT 4 SECONDS AND NE 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
THU NIGHT
W WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
W 1 FOOT AT 3 SECONDS AND S 1 FOOT AT 4 SECONDS.
FRI AND FRI NIGHT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT AT 3 SECONDS AND SW 1 FOOT AT
5 SECONDS.
SAT THROUGH SUN
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT AT 3 SECONDS AND SW 2 FT AT
5 SECONDS.
SUN NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 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.
ANZ233-130000-
VINEYARD SOUND-
705 AM EDT WED AUG 12 2026
TODAY
N WINDS AROUND 5 KT, BECOMING S THIS AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 2 SECONDS AND SW 1 FOOT
AT 5 SECONDS. A SLIGHT CHANCE OF SHOWERS THIS MORNING.
TONIGHT
SW WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL:
W 1 FOOT AT 2 SECONDS AND E 1 FOOT AT 2 SECONDS.
THU
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT IN THE
AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS
AND SE 1 FOOT AT 8 SECONDS. PATCHY FOG IN THE MORNING. A CHANCE
OF SHOWERS IN THE AFTERNOON. VSBY 1 TO 3 NM IN THE MORNING.
THU NIGHT
SW WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND W 1 FOOT
AT 2 SECONDS.
FRI
N WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 2 SECONDS AND SW 1 FOOT AT
5 SECONDS.
FRI NIGHT
NW WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 3 SECONDS
AND SW 1 FOOT AT 5 SECONDS.
SAT THROUGH SUN
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT.
SUN NIGHT
SW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. SHOWERS
LIKELY.
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.
ANZ234-130000-
BUZZARDS BAY-
705 AM EDT WED AUG 12 2026
TODAY
N WINDS AROUND 5 KT, BECOMING S THIS AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 3 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 4 SECONDS.
THU
W WINDS 5 TO 10 KT, BECOMING SW 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 SW 1 FOOT AT 3 SECONDS AND E 1 FOOT AT
3 SECONDS. PATCHY FOG IN THE MORNING. A CHANCE OF SHOWERS IN THE
AFTERNOON. VSBY 1 NM OR LESS IN THE MORNING.
THU NIGHT
SW WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 1 FOOT AT 4 SECONDS AND SE
1 FOOT AT 9 SECONDS.
FRI
N WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 2 SECONDS AND SW 1 FOOT AT
4 SECONDS.
FRI NIGHT
NW WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 3 SECONDS
AND SW 1 FOOT AT 5 SECONDS.
SAT THROUGH SUN
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 3 FT.
SUN NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 3 FT. SHOWERS LIKELY.
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.
ANZ235-130000-
RHODE ISLAND SOUND-
705 AM EDT WED AUG 12 2026
TODAY
N WINDS AROUND 5 KT, BECOMING S THIS AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 5 SECONDS AND N 1 FOOT AT
3 SECONDS. A SLIGHT CHANCE OF SHOWERS THIS MORNING.
TONIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S
2 FT AT 5 SECONDS AND E 1 FOOT AT 2 SECONDS.
THU
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND
SE 1 FOOT AT 2 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 NM
OR LESS.
THU NIGHT
W WINDS 10 TO 15 KT, BECOMING NW 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND
SE 1 FOOT AT 8 SECONDS.
FRI
N WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 6 SECONDS AND N 1 FOOT AT
2 SECONDS.
FRI NIGHT
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT AT 4 SECONDS AND SW
2 FT AT 5 SECONDS.
SAT THROUGH SUN
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT.
SUN NIGHT
SW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. SHOWERS
LIKELY.
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.
ANZ237-130000-
BLOCK ISLAND SOUND-
705 AM EDT WED AUG 12 2026
TODAY
N WINDS AROUND 5 KT, BECOMING SW THIS AFTERNOON. SEAS
AROUND 2 FT THIS MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: N
1 FOOT AT 2 SECONDS AND S 1 FOOT AT 6 SECONDS, BECOMING NE 1 FOOT
AT 2 SECONDS AND SW 1 FOOT AT 2 SECONDS. A SLIGHT CHANCE OF
SHOWERS THIS MORNING.
TONIGHT
SW WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS, THEN AROUND
2 FT AFTER MIDNIGHT. WAVE DETAIL: W 1 FOOT AT 2 SECONDS AND S
1 FOOT AT 5 SECONDS, BECOMING W 1 FOOT AT 2 SECONDS AND SE 1 FOOT
AT 2 SECONDS.
THU
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT
AT 5 SECONDS AND W 1 FOOT AT 2 SECONDS.
THU NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 1 FOOT AT 4 SECONDS AND SE 1 FOOT AT 8 SECONDS.
FRI
N WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: NW 1 FOOT AT 2 SECONDS AND S 1 FOOT AT
2 SECONDS.
FRI NIGHT
NW WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 2 SECONDS
AND S 1 FOOT AT 6 SECONDS.
SAT THROUGH SUN
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. SHOWERS LIKELY.
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.
ANZ230-130000-
BOSTON HARBOR-
705 AM EDT WED AUG 12 2026
TODAY
N WINDS AROUND 5 KT, BECOMING SE THIS AFTERNOON. WAVES
1 FOOT OR LESS.
TONIGHT
S WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
THU
SW WINDS AROUND 5 KT. WAVES 1 FOOT OR LESS. A CHANCE OF
SHOWERS IN THE AFTERNOON.
THU NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
FRI
NW WINDS 5 TO 10 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS IN THE AFTERNOON.
FRI NIGHT
N WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
SAT THROUGH SUN
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
SUN NIGHT
S WINDS 10 TO 15 KT. WAVES AROUND 2 FT. SHOWERS
LIKELY.
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.
ANZ236-130000-
NARRAGANSETT BAY-
705 AM EDT WED AUG 12 2026
TODAY
N WINDS AROUND 5 KT, BECOMING S THIS AFTERNOON. WAVES
1 FOOT OR LESS.
TONIGHT
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.
THU NIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
WAVES AROUND 2 FT.
FRI
N WINDS AROUND 5 KT, BECOMING W IN THE AFTERNOON. WAVES
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON.
FRI NIGHT
N WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
SAT THROUGH SUN
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
WAVES AROUND 2 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES
AROUND 2 FT. SHOWERS LIKELY.
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.
ANZ280-130000-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
705 AM EDT WED AUG 12 2026
TODAY
NW WINDS AROUND 5 KT, BECOMING SW THIS AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: NW 1 FOOT AT 4 SECONDS AND S 1 FOOT AT
6 SECONDS.
TONIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S
2 FT AT 7 SECONDS AND NW 1 FOOT AT 3 SECONDS.
THU
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
2 FT AT 4 SECONDS AND W 1 FOOT AT 3 SECONDS. A CHANCE OF SHOWERS
IN THE AFTERNOON.
THU NIGHT
SW WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: W 1 FOOT AT 3 SECONDS AND SE 1 FOOT
AT 4 SECONDS.
FRI
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT
AT 3 SECONDS AND S 1 FOOT AT 6 SECONDS.
FRI NIGHT
NW WINDS 10 TO 15 KT, BECOMING N AFTER MIDNIGHT.
GUSTS UP TO 20 KT. SEAS 3 TO 5 FT. WAVE DETAIL: N 3 FT AT
4 SECONDS AND S 1 FOOT AT 6 SECONDS.
SAT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
5 FT.
SAT NIGHT AND SUN
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 25 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.
ANZ281-130000-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
705 AM EDT WED AUG 12 2026
TODAY
NW WINDS AROUND 5 KT, BECOMING NE AROUND 5 KT THIS
AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS
AND N 1 FOOT AT 3 SECONDS. A SLIGHT CHANCE OF SHOWERS THIS
MORNING. PATCHY FOG THIS AFTERNOON WITH VSBY 1 NM OR LESS.
TONIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND N 1 FOOT AT
3 SECONDS. PATCHY FOG AFTER MIDNIGHT WITH VSBY 1 NM OR LESS.
THU
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
2 FT AT 5 SECONDS AND NW 1 FOOT AT 3 SECONDS. PATCHY FOG IN THE
MORNING WITH VSBY 1 NM OR LESS.
THU NIGHT
W WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: W
2 FT AT 4 SECONDS AND SE 1 FOOT AT 10 SECONDS.
FRI AND FRI NIGHT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 3 TO 5 FT. WAVE DETAIL: N 3 FT AT 4 SECONDS AND SW 2 FT AT
6 SECONDS.
SAT AND SAT NIGHT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING W 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: N 3 FT AT
4 SECONDS AND S 1 FOOT AT 6 SECONDS.
SUN
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 25 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.
ANZ282-130000-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
705 AM EDT WED AUG 12 2026
TODAY
W WINDS AROUND 5 KT, BECOMING N THIS AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: W 2 FT AT 5 SECONDS AND E 1 FOOT AT
8 SECONDS. A CHANCE OF SHOWERS, MAINLY THIS MORNING.
TONIGHT
W WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
2 FT AT 5 SECONDS AND E 1 FOOT AT 8 SECONDS. PATCHY FOG AFTER
MIDNIGHT WITH VSBY 1 NM OR LESS.
THU
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT
AT 3 SECONDS AND SW 2 FT AT 6 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 NM OR LESS.
THU NIGHT
W WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: W
2 FT AT 5 SECONDS AND SE 1 FOOT AT 10 SECONDS.
FRI AND FRI NIGHT
N WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: N 2 FT AT 3 SECONDS AND SW 2 FT AT 6 SECONDS.
SAT THROUGH SUN
SW WINDS 10 TO 15 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: SW 3 FT AT 7 SECONDS AND N 2 FT AT 4 SECONDS.
SUN NIGHT
SW WINDS 15 TO 20 KT. SEAS 2 TO 4 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.
ANZ283-130000-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
705 AM EDT WED AUG 12 2026
TODAY
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
2 FT AT 5 SECONDS AND NW 1 FOOT AT 3 SECONDS. A CHANCE OF
SHOWERS, MAINLY THIS MORNING.
TONIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S
2 FT AT 7 SECONDS AND W 1 FOOT AT 2 SECONDS.
THU
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT
AT 5 SECONDS AND SE 1 FOOT AT 8 SECONDS.
THU NIGHT
W WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW
2 FT AT 5 SECONDS AND SE 1 FOOT AT 10 SECONDS.
FRI
NW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SW 2 FT
AT 5 SECONDS AND N 1 FOOT AT 3 SECONDS.
FRI NIGHT
N WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. SEAS 3 TO 5 FT. WAVE DETAIL: N
3 FT AT 4 SECONDS AND S 1 FOOT AT 6 SECONDS.
SAT THROUGH SUN
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 4 FT.
SUN NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 4 FT. SHOWERS LIKELY.
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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