486
FZUS51 KBOX 120202
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1002 PM EDT SAT APR 11 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 25 NM
ANZ200-121500-
1002 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.
ANZ250-121500-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
1002 PM EDT SAT APR 11 2026
OVERNIGHT
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.
MON
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
6 FT. A CHANCE OF SHOWERS.
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
W WINDS 10 TO 15 KT, BECOMING S 5 TO 10 KT IN THE
AFTERNOON. 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.
THU AND THU NIGHT
SW WINDS 10 TO 15 KT. 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.
ANZ251-121500-
MASSACHUSETTS BAY AND IPSWICH BAY-
1002 PM EDT SAT APR 11 2026
OVERNIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 4 FT.
SUN
NW WINDS 5 TO 10 KT, BECOMING SE 10 TO 15 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT.
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. A CHANCE OF SHOWERS.
MON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
4 FT. A CHANCE OF SHOWERS.
MON NIGHT
SW WINDS 15 TO 20 KT, BECOMING W 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. A CHANCE OF SHOWERS
IN THE EVENING.
TUE
W WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT IN THE
AFTERNOON. SEAS AROUND 2 FT.
TUE NIGHT
SW WINDS 10 TO 15 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
WED
SW WINDS AROUND 10 KT. SEAS AROUND 2 FT.
WED NIGHT
SW WINDS 10 TO 15 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
THU AND THU 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.
ANZ231-121500-
CAPE COD BAY-
1002 PM EDT SAT APR 11 2026
OVERNIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT.
SUN
NW WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS
2 TO 3 FT.
SUN NIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 25 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 AND TUE NIGHT
SW WINDS 10 TO 15 KT. SEAS AROUND 2 FT.
WED THROUGH THU 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.
ANZ254-121500-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
1002 PM EDT SAT APR 11 2026
OVERNIGHT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
4 TO 5 FT.
SUN
N WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
3 TO 5 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 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
W WINDS 10 TO 15 KT, BECOMING SW 5 TO 10 KT IN THE
AFTERNOON. SEAS 3 TO 5 FT.
TUE NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
WED THROUGH THU 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.
ANZ255-121500-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
1002 PM EDT SAT APR 11 2026
OVERNIGHT
N WINDS 5 TO 10 KT. 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. GUSTS UP TO 20 KT IN THE MORNING.
SEAS 4 TO 6 FT.
TUE NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT.
WED THROUGH THU NIGHT
SW WINDS 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.
ANZ256-121500-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
1002 PM EDT SAT APR 11 2026
OVERNIGHT
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
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 9 FT, SUBSIDING TO 5 TO 8 FT AFTER MIDNIGHT.
TUE
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE MORNING.
SEAS 4 TO 6 FT.
TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
3 TO 4 FT.
WED THROUGH THU NIGHT
SW WINDS 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.
ANZ232-121500-
NANTUCKET SOUND-
1002 PM EDT SAT APR 11 2026
OVERNIGHT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 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 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 AND TUE NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
WED THROUGH THU 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.
ANZ233-121500-
VINEYARD SOUND-
1002 PM EDT SAT APR 11 2026
OVERNIGHT
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 AND TUE NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
WED THROUGH THU 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.
ANZ234-121500-
BUZZARDS BAY-
1002 PM EDT SAT APR 11 2026
OVERNIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
SUN
N WINDS AROUND 5 KT, BECOMING S 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 AND TUE NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
WED THROUGH THU 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.
ANZ235-121500-
RHODE ISLAND SOUND-
1002 PM EDT SAT APR 11 2026
OVERNIGHT
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
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
WED THROUGH THU 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.
ANZ237-121500-
BLOCK ISLAND SOUND-
1002 PM EDT SAT APR 11 2026
OVERNIGHT
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
SUN
NE 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
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
6 FT.
MON NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT,
BECOMING W 10 TO 15 KT WITH GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS 4 TO 6 FT.
TUE AND TUE NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
WED THROUGH THU 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.
ANZ230-121500-
BOSTON HARBOR-
1002 PM EDT SAT APR 11 2026
OVERNIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. 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
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. WAVES AROUND
2 FT. A CHANCE OF SHOWERS.
MON NIGHT
SW WINDS 15 TO 20 KT, BECOMING W 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS IN THE EVENING.
TUE
W WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. WAVES
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON.
TUE NIGHT
SW WINDS 10 TO 15 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS.
WED
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
WED NIGHT
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS.
THU
SW WINDS 10 TO 15 KT. WAVES AROUND 2 FT.
THU 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.
ANZ236-121500-
NARRAGANSETT BAY-
1002 PM EDT SAT APR 11 2026
OVERNIGHT
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
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. WAVES 3 TO
4 FT.
MON NIGHT AND TUE
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
WAVES 2 TO 4 FT.
TUE NIGHT
SW WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT
AFTER MIDNIGHT. WAVES AROUND 2 FT.
WED THROUGH THU 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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