933
FZUS51 KBOX 111702
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
101 PM EDT SAT APR 11 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 25 NM
ANZ200-120600-
101 PM EDT SAT APR 11 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
HIGH PRES OVER THE GREAT LAKES BUILDS EAST INTO NEW ENGLAND
SATURDAY NIGHT, THEN SLIDING OFFSHORE SUNDAY AFTERNOON. A WARM FRONT
MOVES ACROSS THE WATERS MON, FOLLOWED BY GUSTY SW WINDS MON
AFTERNOON. A BACKDOOR FRONT WILL DROP S INTO NORTHERN NEW ENG
TUE...THEN PERHAPS IMPACTING THE EASTERN MA COASTAL WATERS BY WED
AND/OR THU, BUT THAT REMAINS UNCERTAIN. MAINLY DRY WEATHER PREVAILS
MUCH OF THIS TIME, WITH ANY SHOWER ACTIVITY LIKELY CONFINED TO
NORTHERN NEW ENGLAND WATERS.
ANZ250-120600-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
101 PM EDT SAT APR 11 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 4 TO 5 FT.
TONIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 4 TO
5 FT.
SUN
NW WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS
3 TO 5 FT.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 3 TO 4 FT. A CHANCE OF SHOWERS.
PATCHY FOG AFTER MIDNIGHT.
MON
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
6 FT. A CHANCE OF SHOWERS. PATCHY FOG IN THE MORNING.
MON NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT,
BECOMING W 15 TO 20 KT AFTER MIDNIGHT. SEAS 4 TO 6 FT. A CHANCE
OF SHOWERS IN THE EVENING.
TUE
SW WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. A CHANCE OF SHOWERS.
WED
S WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
WED NIGHT
SW WINDS 10 TO 15 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.
ANZ251-120600-
MASSACHUSETTS BAY AND IPSWICH BAY-
101 PM EDT SAT APR 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING
THIS AFTERNOON
NW WINDS AROUND 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 4 FT.
TONIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 2 TO 4 FT.
SUN
NW WINDS 5 TO 10 KT, BECOMING SE IN THE AFTERNOON. SEAS
2 TO 3 FT.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS. PATCHY FOG AFTER
MIDNIGHT.
MON AND MON NIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 4 FT. A CHANCE OF SHOWERS.
TUE
SW WINDS 10 TO 15 KT. SEAS AROUND 2 FT.
TUE NIGHT
SW WINDS 10 TO 15 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
WED
SW WINDS 10 TO 15 KT. SEAS AROUND 2 FT.
WED NIGHT
SW WINDS 10 TO 15 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.
ANZ231-120600-
CAPE COD BAY-
101 PM EDT SAT APR 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING
THIS AFTERNOON
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT.
TONIGHT
NW WINDS AROUND 10 KT. SEAS 2 TO 3 FT.
SUN
NW WINDS 5 TO 10 KT, BECOMING SE IN THE AFTERNOON. SEAS
2 TO 3 FT.
SUN NIGHT
S WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS.
MON
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 3 TO
5 FT.
MON NIGHT
SW WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT
AFTER MIDNIGHT. GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. A CHANCE OF
SHOWERS.
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.
ANZ254-120600-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
101 PM EDT SAT APR 11 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 4 TO 5 FT.
TONIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 4 TO
5 FT.
SUN
N WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. SEAS 3 TO
5 FT.
SUN NIGHT
S WINDS 5 TO 10 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT.
MON
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
6 FT, BUILDING TO 5 TO 8 FT IN THE AFTERNOON.
MON NIGHT
SW WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT
AFTER MIDNIGHT. GUSTS UP TO 30 KT. SEAS 5 TO 8 FT, SUBSIDING TO
4 TO 6 FT AFTER MIDNIGHT. A CHANCE OF SHOWERS.
TUE
SW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
TUE NIGHT 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.
ANZ255-120600-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
101 PM EDT SAT APR 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
THIS AFTERNOON
NW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
TONIGHT
NW WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
3 TO 4 FT.
SUN
N WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS 2 TO
4 FT.
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.
MON
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 5 TO
7 FT, BUILDING TO 6 TO 9 FT IN THE AFTERNOON.
MON NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
7 TO 10 FT. A CHANCE OF SHOWERS IN THE EVENING.
TUE
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 4 TO
6 FT.
TUE NIGHT THROUGH WED NIGHT
SW 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.
ANZ256-120600-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
101 PM EDT SAT APR 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
THIS AFTERNOON
W WINDS AROUND 10 KT. SEAS 4 TO 5 FT.
TONIGHT
N WINDS AROUND 10 KT. SEAS 3 TO 4 FT.
SUN
N WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS 3 TO
4 FT.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT WITH
GUSTS UP TO 25 KT AFTER MIDNIGHT. SEAS 3 TO 5 FT.
MON AND MON NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 6 TO 9 FT.
TUE
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 4 TO
6 FT.
TUE NIGHT THROUGH WED NIGHT
SW 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.
ANZ232-120600-
NANTUCKET SOUND-
101 PM EDT SAT APR 11 2026
THIS AFTERNOON
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
TONIGHT
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
SUN
N WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS 2 TO
3 FT.
SUN NIGHT
S WINDS 5 TO 10 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT.
MON
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 3 TO
5 FT.
MON NIGHT
SW WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT
AFTER MIDNIGHT. GUSTS UP TO 30 KT. SEAS 4 TO 6 FT. A CHANCE OF
SHOWERS IN THE EVENING.
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.
ANZ233-120600-
VINEYARD SOUND-
101 PM EDT SAT APR 11 2026
THIS AFTERNOON
NW WINDS AROUND 10 KT. SEAS AROUND 2 FT.
TONIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
SUN
N WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
AROUND 2 FT.
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.
MON
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
6 FT.
MON NIGHT
SW WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT
AFTER MIDNIGHT. GUSTS UP TO 30 KT. SEAS 4 TO 6 FT. A CHANCE OF
SHOWERS IN THE EVENING.
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.
ANZ234-120600-
BUZZARDS BAY-
101 PM EDT SAT APR 11 2026
THIS AFTERNOON
NW WINDS AROUND 10 KT. SEAS AROUND 2 FT.
TONIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
SUN
N WINDS AROUND 5 KT, BECOMING SW IN THE AFTERNOON. SEAS
AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS.
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.
MON
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 3 TO
5 FT.
MON NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT,
DIMINISHING TO 15 TO 20 KT AFTER MIDNIGHT. SEAS 3 TO 5 FT. A
CHANCE OF SHOWERS IN THE EVENING.
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.
ANZ235-120600-
RHODE ISLAND SOUND-
101 PM EDT SAT APR 11 2026
THIS AFTERNOON
NW WINDS AROUND 10 KT. SEAS 2 TO 3 FT.
TONIGHT
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
SUN
N WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS 2 TO
3 FT.
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.
MON
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 5 TO
7 FT.
MON NIGHT
SW WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT
AFTER MIDNIGHT. GUSTS UP TO 30 KT. SEAS 5 TO 7 FT. A CHANCE OF
SHOWERS IN THE EVENING.
TUE
SW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
TUE NIGHT THROUGH WED NIGHT
SW 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.
ANZ237-120600-
BLOCK ISLAND SOUND-
101 PM EDT SAT APR 11 2026
THIS AFTERNOON
NW WINDS AROUND 10 KT. SEAS 3 TO 4 FT.
TONIGHT
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
SUN
N WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
2 TO 3 FT.
SUN NIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT.
MON AND MON NIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
SEAS 4 TO 6 FT.
TUE THROUGH WED NIGHT
SW 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.
ANZ230-120600-
BOSTON HARBOR-
101 PM EDT SAT APR 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING
THIS AFTERNOON
NW WINDS AROUND 15 KT WITH GUSTS UP TO 20 KT.
WAVES AROUND 2 FT.
TONIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
DIMINISHING TO 5 TO 10 KT AFTER MIDNIGHT. WAVES AROUND 2 FT.
SUN
NW WINDS 5 TO 10 KT, BECOMING SE IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
SUN NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. WAVES AROUND 2 FT. A CHANCE OF SHOWERS.
MON AND MON NIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
WAVES AROUND 2 FT. A CHANCE OF SHOWERS.
TUE
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
TUE NIGHT
SW WINDS 10 TO 15 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS.
WED
SW WINDS 10 TO 15 KT. WAVES AROUND 2 FT.
WED NIGHT
SW WINDS 10 TO 15 KT. WAVES 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.
ANZ236-120600-
NARRAGANSETT BAY-
101 PM EDT SAT APR 11 2026
THIS AFTERNOON
NW WINDS AROUND 10 KT. WAVES AROUND 2 FT.
TONIGHT
N WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
SUN
N WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. WAVES
AROUND 2 FT.
SUN NIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS IN THE EVENING.
MON AND MON NIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
WAVES 2 TO 4 FT.
TUE THROUGH WED 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.
FOR THE LATEST UPDATES...PLEASE VISIT OUR WEBPAGE AT
WWW.WEATHER.GOV/BOSTON
YOU CAN FOLLOW US ON FACEBOOK AT
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.BOSTON.GOV
YOU CAN FOLLOW US ON TWITTER AT
@NWSBOSTON
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page