636
FZUS51 KBOX 072302
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
702 PM EDT TUE APR 7 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 25 NM
ANZ200-081200-
702 PM EDT TUE APR 7 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
A LARGE HIGH PRES BUILDS IN FROM THE W ON WED AND MOVES E OF THE
WATERS THU. A WEAK COLD FRONT CROSSES THE WATERS LATE FRI INTO EARLY
SAT, FOLLOWED BY ANOTHER HIGH PRES BUILDING IN FOR SUN.
ANZ250-081200-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
702 PM EDT TUE APR 7 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING
TONIGHT
NW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 3 TO
5 FT.
WED
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT, BECOMING NE
5 TO 10 KT IN THE AFTERNOON. SEAS 3 TO 5 FT.
WED NIGHT
SE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
2 TO 3 FT.
THU
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT WITH GUSTS
UP TO 25 KT IN THE AFTERNOON. SEAS 2 TO 3 FT.
THU NIGHT AND FRI
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 4 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
4 TO 6 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT AND SAT NIGHT
NW WINDS 10 TO 15 KT, DIMINISHING TO 5 TO
10 KT. SEAS 4 TO 6 FT.
SUN AND SUN NIGHT
SW WINDS 10 TO 15 KT, BECOMING S 15 TO 20 KT
WITH GUSTS UP TO 25 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.
ANZ251-081200-
MASSACHUSETTS BAY AND IPSWICH BAY-
702 PM EDT TUE APR 7 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING
TONIGHT
NW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 2 TO
3 FT.
WED
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING E
5 TO 10 KT IN THE AFTERNOON. SEAS 2 TO 3 FT.
WED NIGHT
SE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
AROUND 2 FT.
THU
S WINDS 10 TO 15 KT, BECOMING SE 15 TO 20 KT WITH GUSTS UP
TO 25 KT IN THE AFTERNOON. SEAS 1 FOOT OR LESS, THEN 2 TO 3 FT IN
THE AFTERNOON.
THU NIGHT AND FRI
S WINDS 15 TO 20 KT. SEAS 2 TO 3 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 2 TO 4 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT
NW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. A CHANCE OF SHOWERS.
SAT NIGHT
NW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
SUN AND SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 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.
ANZ231-081200-
CAPE COD BAY-
702 PM EDT TUE APR 7 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING
TONIGHT
NW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 2 TO
4 FT.
WED
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT, BECOMING NE
5 TO 10 KT IN THE AFTERNOON. SEAS 2 TO 4 FT.
WED NIGHT
SE WINDS AROUND 5 KT. SEAS AROUND 2 FT.
THU
SE 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 AROUND
2 FT IN THE AFTERNOON.
THU NIGHT THROUGH FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 KT. SEAS 2 TO 3 FT.
SAT THROUGH SUN NIGHT
SW 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.
ANZ254-081200-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
702 PM EDT TUE APR 7 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING
TONIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS 3 TO
5 FT.
WED
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT, BECOMING NE
10 TO 15 KT IN THE AFTERNOON. SEAS 3 TO 5 FT.
WED NIGHT
E WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT. SEAS
2 TO 4 FT.
THU
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
THU NIGHT
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
FRI
SW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
4 TO 6 FT.
SAT AND SAT NIGHT
NW WINDS 10 TO 15 KT, BECOMING N 5 TO 10 KT.
SEAS 4 TO 6 FT.
SUN AND SUN NIGHT
NW WINDS 5 TO 10 KT, BECOMING S 15 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.
ANZ255-081200-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
702 PM EDT TUE APR 7 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING
TONIGHT
NW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
5 FT.
WED
N WINDS 15 TO 20 KT, BECOMING NE 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 3 TO 5 FT.
WED NIGHT
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
THU
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
THU NIGHT
SE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
2 TO 3 FT.
FRI AND FRI NIGHT
SW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SAT AND SAT NIGHT
NW WINDS 10 TO 15 KT, BECOMING N 5 TO 10 KT.
SEAS 4 TO 6 FT.
SUN AND SUN NIGHT
E WINDS 5 TO 10 KT, BECOMING S 15 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.
ANZ256-081200-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
702 PM EDT TUE APR 7 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING
TONIGHT
NW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
5 FT.
WED
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT, BECOMING NE
10 TO 15 KT IN THE AFTERNOON. SEAS 2 TO 4 FT.
WED NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
THU
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
THU NIGHT
SE WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT.
SEAS 2 TO 3 FT.
FRI AND FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 3 TO 5 FT.
SAT AND SAT NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING N 5 TO 10 KT. SEAS 4 TO 6 FT.
SUN AND SUN NIGHT
E WINDS 5 TO 10 KT, BECOMING S 15 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.
ANZ232-081200-
NANTUCKET SOUND-
702 PM EDT TUE APR 7 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING
TONIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
3 FT.
WED
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT, BECOMING NE
10 TO 15 KT IN THE AFTERNOON. SEAS 2 TO 3 FT.
WED NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
THU
SE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS.
THU NIGHT THROUGH FRI NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO
3 FT.
SAT THROUGH SUN NIGHT
S 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.
ANZ233-081200-
VINEYARD SOUND-
702 PM EDT TUE APR 7 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT WEDNESDAY
TONIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
3 FT.
WED
N WINDS 15 TO 20 KT, BECOMING NE 5 TO 10 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT.
WED NIGHT
SE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS.
THU
SE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS.
THU NIGHT THROUGH FRI NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO
3 FT.
SAT THROUGH SUN NIGHT
S 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.
ANZ234-081200-
BUZZARDS BAY-
702 PM EDT TUE APR 7 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT WEDNESDAY
TONIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
3 FT.
WED
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING NE
5 TO 10 KT IN THE AFTERNOON. SEAS AROUND 2 FT IN THE MORNING,
THEN 1 FOOT OR LESS.
WED NIGHT
SE WINDS 5 TO 10 KT, DIMINISHING TO AROUND 5 KT
AFTER MIDNIGHT. SEAS 1 FOOT OR LESS.
THU
SE WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT IN THE
AFTERNOON. SEAS 1 FOOT OR LESS.
THU NIGHT THROUGH FRI NIGHT
SW WINDS 10 TO 15 KT. SEAS AROUND
2 FT.
SAT THROUGH SUN NIGHT
S 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.
ANZ235-081200-
RHODE ISLAND SOUND-
702 PM EDT TUE APR 7 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT WEDNESDAY
TONIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS 2 TO
4 FT.
WED
N WINDS 15 TO 20 KT, BECOMING E AROUND 10 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT.
WED NIGHT
SE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS.
THU
SE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT
IN THE AFTERNOON.
THU NIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
AROUND 2 FT.
FRI AND FRI NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
SAT THROUGH SUN NIGHT
S WINDS 15 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.
ANZ237-081200-
BLOCK ISLAND SOUND-
702 PM EDT TUE APR 7 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT WEDNESDAY
TONIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
4 FT.
WED
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING E
5 TO 10 KT IN THE AFTERNOON. SEAS 2 TO 3 FT.
WED NIGHT
SE WINDS 5 TO 10 KT, DIMINISHING TO AROUND 5 KT
AFTER MIDNIGHT. SEAS 1 FOOT OR LESS.
THU
SE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS.
THU NIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
AROUND 2 FT.
FRI AND FRI NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
SAT THROUGH SUN 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.
ANZ230-081200-
BOSTON HARBOR-
702 PM EDT TUE APR 7 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT WEDNESDAY
TONIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. WAVES
AROUND 2 FT.
WED
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING E
5 TO 10 KT IN THE AFTERNOON. WAVES AROUND 2 FT IN THE MORNING,
THEN 1 FOOT OR LESS.
WED NIGHT
SE WINDS AROUND 10 KT, BECOMING SW AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS.
THU
S WINDS 5 TO 10 KT, BECOMING SE 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 AND FRI
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
WAVES AROUND 2 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS.
SAT
NW WINDS 10 TO 15 KT. WAVES 1 FOOT OR LESS. A CHANCE OF
SHOWERS.
SAT NIGHT THROUGH SUN NIGHT
S WINDS 15 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.
ANZ236-081200-
NARRAGANSETT BAY-
702 PM EDT TUE APR 7 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT WEDNESDAY
TONIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. WAVES
2 TO 3 FT.
WED
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING E
5 TO 10 KT IN THE AFTERNOON. WAVES AROUND 2 FT IN THE MORNING,
THEN 1 FOOT OR LESS.
WED NIGHT
SE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS.
THU
SE WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT IN THE
AFTERNOON. WAVES 1 FOOT OR LESS, THEN AROUND 2 FT IN THE
AFTERNOON.
THU NIGHT THROUGH FRI NIGHT
SW WINDS 10 TO 15 KT. WAVES 2 TO
3 FT.
SAT THROUGH SUN NIGHT
SW WINDS 10 TO 15 KT. WAVES 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.
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