987
FZUS51 KBOX 132305
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
705 PM EDT THU AUG 13 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-141200-
705 PM EDT THU AUG 13 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
WEAK FRONTAL BOUNDARIES WILL TRAVERSE THE COASTAL WATERS THROUGH
FRI, WITH LITTLE IMPACT OUTSIDE OF SCATTERED SHOWERS AND
THUNDERSTORMS. THIS WEEKEND, BRIEF HIGH PRES BUILDS IN FROM THE NW,
FOLLOWED BY LOW PRES MOVING OUT OF THE NORTHERN GREAT LAKES LATE SUN
INTO MON, BRINGING A RETURN TO UNSETTLED CONDITIONS.
ANZ250-141200-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
705 PM EDT THU AUG 13 2026
TONIGHT
SW WINDS 5 TO 10 KT, BECOMING NW 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL:
W 1 FOOT AT 3 SECONDS AND SE 1 FOOT AT 4 SECONDS.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING W
5 TO 10 KT IN THE AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: N
2 FT AT 3 SECONDS AND S 1 FOOT AT 4 SECONDS.
FRI NIGHT
NW WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND S 1 FOOT AT
4 SECONDS.
SAT
N WINDS 5 TO 10 KT, BECOMING NE IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: N 2 FT AT 4 SECONDS AND S 1 FOOT AT
5 SECONDS.
SAT NIGHT
S WINDS AROUND 5 KT, BECOMING SW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND S 1 FOOT
AT 4 SECONDS.
SUN
SW WINDS AROUND 5 KT, BECOMING S 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT
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. A CHANCE OF SHOWERS IN THE EVENING. SHOWERS LIKELY
AFTER MIDNIGHT.
MON
E WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
3 FT. SHOWERS LIKELY.
MON NIGHT THROUGH TUE 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.
ANZ251-141200-
MASSACHUSETTS BAY AND IPSWICH BAY-
705 PM EDT THU AUG 13 2026
TONIGHT
SW WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: SE 1 FOOT AT 2 SECONDS AND W 1 FOOT
AT 3 SECONDS.
FRI
NW WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: S 1 FOOT AT 3 SECONDS AND N 1 FOOT
AT 3 SECONDS.
FRI NIGHT
NW WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: SW 1 FOOT AT 3 SECONDS AND N 1 FOOT AT 3 SECONDS.
SAT
N WINDS 5 TO 10 KT, BECOMING E IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND S 1 FOOT
AT 5 SECONDS.
SAT 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 W 1 FOOT
AT 2 SECONDS.
SUN
SW 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 NE
1 FOOT AT 4 SECONDS, BECOMING SE 2 FT AT 3 SECONDS AND W 1 FOOT
AT 2 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
AROUND 2 FT. SHOWERS LIKELY.
MON
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. SHOWERS LIKELY.
MON NIGHT THROUGH TUE 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.
ANZ231-141200-
CAPE COD BAY-
705 PM EDT THU AUG 13 2026
TONIGHT
SW WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
1 FOOT OR LESS, THEN AROUND 2 FT AFTER MIDNIGHT. WAVE DETAIL: W
1 FOOT AT 2 SECONDS AND SE 1 FOOT AT 4 SECONDS, BECOMING NW
1 FOOT AT 2 SECONDS AND SE 1 FOOT AT 4 SECONDS.
FRI
NW WINDS 10 TO 15 KT, BECOMING N 5 TO 10 KT IN THE
AFTERNOON. SEAS AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS.
WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND S 1 FOOT AT 5 SECONDS.
FRI NIGHT
W WINDS AROUND 5 KT, BECOMING N AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND S 1 FOOT
AT 4 SECONDS.
SAT
N WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL: N
1 FOOT AT 3 SECONDS AND S 1 FOOT AT 5 SECONDS.
SAT NIGHT
SE WINDS AROUND 5 KT, BECOMING SW AROUND 5 KT AFTER
MIDNIGHT. SEAS 1 FOOT OR LESS. WAVE DETAIL: S 1 FOOT AT 5 SECONDS
AND N 1 FOOT AT 5 SECONDS.
SUN
SW 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: W 1 FOOT AT 3 SECONDS AND N 1 FOOT
AT 4 SECONDS, BECOMING SW 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. SHOWERS. A CHANCE OF TSTMS AFTER MIDNIGHT.
MON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
3 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON NIGHT THROUGH TUE NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND
2 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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.
ANZ254-141200-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
705 PM EDT THU AUG 13 2026
TONIGHT
W WINDS 5 TO 10 KT, BECOMING NW WITH GUSTS UP TO 20 KT
AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT AT
5 SECONDS AND W 1 FOOT AT 3 SECONDS.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, DIMINISHING
TO 5 TO 10 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: N
2 FT AT 4 SECONDS AND S 1 FOOT AT 5 SECONDS.
FRI NIGHT
SW WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND S 1 FOOT AT
5 SECONDS.
SAT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT
AT 4 SECONDS AND S 1 FOOT AT 6 SECONDS.
SAT NIGHT
N 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
SW WINDS AROUND 5 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 3 SECONDS AND N 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. A CHANCE OF SHOWERS IN THE EVENING. SHOWERS
LIKELY AFTER MIDNIGHT.
MON
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT. SHOWERS LIKELY.
MON NIGHT THROUGH TUE NIGHT
SE 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.
ANZ255-141200-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
705 PM EDT THU AUG 13 2026
TONIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW
2 FT AT 5 SECONDS AND NE 1 FOOT AT 5 SECONDS.
FRI
NW WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND N 1 FOOT AT
4 SECONDS.
FRI NIGHT
W WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND SW 1 FOOT AT
5 SECONDS.
SAT
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: N
1 FOOT AT 3 SECONDS AND SW 1 FOOT AT 5 SECONDS.
SAT NIGHT
SE WINDS AROUND 5 KT, BECOMING SW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: NW 1 FOOT AT 3 SECONDS AND NE
1 FOOT AT 4 SECONDS.
SUN
SW 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 3 SECONDS AND NE 1 FOOT AT 4 SECONDS.
SUN NIGHT
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 4 FT, BUILDING TO 4 TO 6 FT AFTER MIDNIGHT. A CHANCE OF
SHOWERS IN THE EVENING, THEN SHOWERS LIKELY WITH A CHANCE OF
TSTMS AFTER MIDNIGHT.
MON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO
7 FT. A CHANCE OF SHOWERS AND TSTMS.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
3 TO 5 FT.
TUE AND TUE NIGHT
NE WINDS 10 TO 15 KT, BECOMING SE 5 TO
10 KT. SEAS 2 TO 3 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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.
ANZ256-141200-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
705 PM EDT THU AUG 13 2026
TONIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: W
2 FT AT 4 SECONDS AND NE 1 FOOT AT 5 SECONDS.
FRI
NW WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND N 1 FOOT AT
3 SECONDS.
FRI NIGHT
W WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND
N 1 FOOT AT 2 SECONDS.
SAT
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.
SAT NIGHT AND SUN
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 NW 1 FOOT AT
2 SECONDS.
SUN NIGHT
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 4 FT, BUILDING TO 5 TO 7 FT AFTER MIDNIGHT. WAVE DETAIL: SW
4 FT AT 5 SECONDS AND SE 2 FT AT 13 SECONDS, BECOMING S 7 FT AT
7 SECONDS AND SE 4 FT AT 10 SECONDS. A CHANCE OF TSTMS. A CHANCE
OF SHOWERS IN THE EVENING, THEN SHOWERS LIKELY AFTER MIDNIGHT.
MON
W WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO
7 FT. SHOWERS LIKELY.
MON NIGHT THROUGH TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 KT. SEAS 2 TO 4 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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.
ANZ232-141200-
NANTUCKET SOUND-
705 PM EDT THU AUG 13 2026
TONIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: E 1 FOOT AT 3 SECONDS AND SW 1 FOOT AT
4 SECONDS.
FRI
NW WINDS AROUND 10 KT, BECOMING W IN THE AFTERNOON. SEAS
AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: N
1 FOOT AT 3 SECONDS AND SW 1 FOOT AT 5 SECONDS, BECOMING N 1 FOOT
AT 2 SECONDS AND SW 1 FOOT AT 5 SECONDS.
FRI NIGHT
W WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: NE 1 FOOT AT 3 SECONDS AND SW 1 FOOT
AT 3 SECONDS.
SAT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT IN THE MORNING, THEN
1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND S 1 FOOT
AT 5 SECONDS, BECOMING N 1 FOOT AT 3 SECONDS AND S 1 FOOT AT
6 SECONDS.
SAT NIGHT AND SUN
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT AT 3 SECONDS AND NE 1 FOOT
AT 3 SECONDS.
SUN NIGHT
S WINDS 15 TO 20 KT, INCREASING TO 20 TO 25 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: SW 4 FT AT 4 SECONDS AND N
1 FOOT AT 4 SECONDS. SHOWERS. A CHANCE OF TSTMS AFTER MIDNIGHT.
MON
W WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON NIGHT THROUGH TUE NIGHT
SE WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 KT. SEAS 2 TO 3 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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.
ANZ233-141200-
VINEYARD SOUND-
705 PM EDT THU AUG 13 2026
TONIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND NE 1 FOOT AT
4 SECONDS.
FRI
NW WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND SW 1 FOOT AT
5 SECONDS.
FRI NIGHT
W WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND SW 1 FOOT
AT 4 SECONDS.
SAT
N WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL: N
1 FOOT AT 3 SECONDS AND SW 1 FOOT AT 6 SECONDS.
SAT NIGHT AND SUN
S 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
2 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: SW
3 FT AT 5 SECONDS AND SE 1 FOOT AT 9 SECONDS, BECOMING SW 5 FT AT
7 SECONDS AND SE 2 FT AT 11 SECONDS. SHOWERS WITH A CHANCE OF
TSTMS.
MON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON NIGHT THROUGH TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 KT. SEAS 2 TO 3 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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.
ANZ234-141200-
BUZZARDS BAY-
705 PM EDT THU AUG 13 2026
TONIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
AROUND 2 FT THIS EVENING, THEN 1 FOOT OR LESS. WAVE DETAIL: SW
1 FOOT AT 4 SECONDS AND NE 1 FOOT AT 4 SECONDS, BECOMING W 1 FOOT
AT 4 SECONDS AND E 1 FOOT AT 4 SECONDS.
FRI
NW WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON. WAVE DETAIL: N
1 FOOT AT 3 SECONDS AND SW 1 FOOT AT 5 SECONDS, BECOMING N 1 FOOT
AT 2 SECONDS AND SW 1 FOOT AT 4 SECONDS.
FRI NIGHT
W WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: SW 1 FOOT AT 4 SECONDS AND N 1 FOOT
AT 4 SECONDS.
SAT
NE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL: N
1 FOOT AT 3 SECONDS AND SW 1 FOOT AT 5 SECONDS.
SAT NIGHT AND SUN
S WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 3 SECONDS AND E 1 FOOT AT
3 SECONDS.
SUN NIGHT
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 4 FT. WAVE DETAIL: SW 4 FT AT 5 SECONDS AND NW 1 FOOT AT
5 SECONDS. SHOWERS WITH A CHANCE OF TSTMS.
MON
W WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
4 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON NIGHT THROUGH TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 KT. SEAS AROUND 2 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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.
ANZ235-141200-
RHODE ISLAND SOUND-
705 PM EDT THU AUG 13 2026
TONIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND NE 1 FOOT AT
4 SECONDS.
FRI
NW WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND N 1 FOOT AT
3 SECONDS.
FRI NIGHT
W WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND N 1 FOOT AT
3 SECONDS.
SAT
N WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND S 1 FOOT AT
6 SECONDS.
SAT NIGHT AND SUN
S WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SW 3 FT AT 4 SECONDS AND E 1 FOOT AT 2 SECONDS.
SUN NIGHT
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 4 FT, BUILDING TO 4 TO 6 FT AFTER MIDNIGHT. WAVE DETAIL: SW
4 FT AT 5 SECONDS AND SE 1 FOOT AT 9 SECONDS, BECOMING S 6 FT AT
7 SECONDS AND SW 2 FT AT 4 SECONDS. SHOWERS WITH A CHANCE OF
TSTMS.
MON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT. SHOWERS LIKELY.
MON NIGHT THROUGH TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 KT. SEAS 2 TO 3 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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.
ANZ237-141200-
BLOCK ISLAND SOUND-
705 PM EDT THU AUG 13 2026
TONIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
1 FOOT AT 4 SECONDS AND NE 1 FOOT AT 4 SECONDS.
FRI
NW WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: N
1 FOOT AT 3 SECONDS AND S 1 FOOT AT 5 SECONDS, BECOMING N 1 FOOT
AT 2 SECONDS AND SW 1 FOOT AT 4 SECONDS.
FRI NIGHT
W WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 2 SECONDS AND SW 1 FOOT AT
4 SECONDS.
SAT
NE WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND S 1 FOOT AT
6 SECONDS.
SAT NIGHT AND SUN
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS AND E 1 FOOT AT
3 SECONDS.
SUN NIGHT
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT. WAVE DETAIL: SW 5 FT AT 5 SECONDS AND SE 2 FT AT
10 SECONDS. SHOWERS WITH A CHANCE OF TSTMS.
MON
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
5 FT. A CHANCE OF SHOWERS.
MON NIGHT THROUGH TUE NIGHT
S WINDS 5 TO 10 KT. SEAS 2 TO
3 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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.
ANZ230-141200-
BOSTON HARBOR-
705 PM EDT THU AUG 13 2026
TONIGHT
NW WINDS AROUND 5 KT, INCREASING TO 5 TO 10 KT AFTER
MIDNIGHT. WAVES 1 FOOT OR LESS.
FRI
NW WINDS 5 TO 10 KT, DIMINISHING TO AROUND 5 KT IN THE
AFTERNOON. WAVES 1 FOOT OR LESS.
FRI NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
SAT
N WINDS AROUND 5 KT, BECOMING E IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS.
SUN
SW 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. GUSTS UP TO 20 KT IN THE
EVENING. WAVES AROUND 2 FT. SHOWERS.
MON
N WINDS AROUND 10 KT. WAVES AROUND 2 FT. SHOWERS LIKELY.
MON NIGHT THROUGH TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FOOT
OR LESS.
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.
ANZ236-141200-
NARRAGANSETT BAY-
705 PM EDT THU AUG 13 2026
TONIGHT
NW WINDS 5 TO 10 KT. WAVES AROUND 2 FT THIS EVENING,
THEN 1 FOOT OR LESS.
FRI
NW WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
FRI NIGHT
NW WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS.
SAT
N WINDS 5 TO 10 KT, BECOMING NW IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
SAT NIGHT AND SUN
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
WAVES 2 TO 3 FT.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. WAVES 2 TO 4 FT. SHOWERS WITH A CHANCE OF TSTMS.
MON
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES 2 TO
4 FT. SHOWERS LIKELY.
MON NIGHT THROUGH TUE NIGHT
S WINDS 5 TO 10 KT. WAVES AROUND
2 FT.
WINDS AND WAVES HIGHER IN AND NEAR TSTMS.
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.
ANZ280-141200-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
705 PM EDT THU AUG 13 2026
TONIGHT
SW WINDS 5 TO 10 KT, BECOMING NW WITH GUSTS UP TO
20 KT AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: W 2 FT AT
3 SECONDS AND SE 2 FT AT 5 SECONDS.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING W
5 TO 10 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT
AT 4 SECONDS AND S 1 FOOT AT 6 SECONDS.
FRI NIGHT
W WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 20 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT
AT 4 SECONDS AND S 1 FOOT AT 6 SECONDS.
SAT
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT AT
5 SECONDS AND S 1 FOOT AT 6 SECONDS.
SAT NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: N
1 FOOT AT 4 SECONDS AND S 1 FOOT AT 6 SECONDS.
SUN
SW WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT
6 SECONDS AND NE 1 FOOT AT 3 SECONDS.
SUN NIGHT
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 4 FT. A CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS AFTER
MIDNIGHT.
MON
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. SHOWERS LIKELY.
MON NIGHT THROUGH TUE 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.
ANZ281-141200-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
705 PM EDT THU AUG 13 2026
TONIGHT
W WINDS 5 TO 10 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND SE 1 FOOT
AT 10 SECONDS. PATCHY FOG AFTER MIDNIGHT WITH VSBY 1 TO 3 NM.
FRI
NW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE MORNING.
SEAS 2 TO 3 FT. WAVE DETAIL: NW 2 FT AT 4 SECONDS AND SW 2 FT AT
6 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 TO 3 NM.
FRI NIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: N 2 FT AT 4 SECONDS AND SW 1 FOOT AT
5 SECONDS.
SAT
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT AT
5 SECONDS AND S 1 FOOT AT 6 SECONDS.
SAT NIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
N 2 FT AT 5 SECONDS AND S 1 FOOT AT 6 SECONDS.
SUN
SW WINDS AROUND 5 KT, BECOMING S 10 TO 15 KT WITH GUSTS UP
TO 20 KT 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 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. A CHANCE OF SHOWERS IN THE EVENING, THEN
SHOWERS AFTER MIDNIGHT.
MON
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO
7 FT. SHOWERS LIKELY.
MON NIGHT THROUGH TUE NIGHT
E 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.
ANZ282-141200-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
705 PM EDT THU AUG 13 2026
TONIGHT
W WINDS 5 TO 10 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS AROUND 3 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND NE 1 FOOT
AT 5 SECONDS.
FRI
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT
AT 5 SECONDS AND N 1 FOOT AT 5 SECONDS.
FRI NIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND SW 1 FOOT AT
5 SECONDS.
SAT
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NW 2 FT
AT 4 SECONDS AND S 1 FOOT AT 6 SECONDS.
SAT NIGHT
NE WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND S 1 FOOT
AT 6 SECONDS.
SUN
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT
AT 6 SECONDS AND W 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 4 FT, BUILDING TO 4 TO
6 FT AFTER MIDNIGHT. A CHANCE OF SHOWERS IN THE EVENING, THEN
SHOWERS WITH A CHANCE OF TSTMS AFTER MIDNIGHT.
MON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO
7 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON NIGHT THROUGH TUE NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 KT. SEAS 3 TO 5 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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.
ANZ283-141200-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
705 PM EDT THU AUG 13 2026
TONIGHT
W WINDS AROUND 10 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND
NE 1 FOOT AT 6 SECONDS.
FRI
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT
AT 4 SECONDS AND S 2 FT AT 5 SECONDS.
FRI NIGHT
W WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: N 2 FT AT 3 SECONDS AND SW 2 FT AT
5 SECONDS.
SAT
NE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT
AT 4 SECONDS AND S 1 FOOT AT 6 SECONDS.
SAT NIGHT AND SUN
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.
SUN NIGHT
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT, BUILDING TO 5 TO 7 FT AFTER MIDNIGHT. WAVE DETAIL: S
5 FT AT 6 SECONDS AND SE 3 FT AT 13 SECONDS, BECOMING SW 7 FT AT
7 SECONDS AND SE 4 FT AT 11 SECONDS. A CHANCE OF TSTMS. A CHANCE
OF SHOWERS IN THE EVENING, THEN SHOWERS LIKELY AFTER MIDNIGHT.
MON
W WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO
7 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON NIGHT THROUGH TUE NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 KT. SEAS 3 TO 5 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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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