482
FZUS51 KBOX 081702
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
102 PM EDT WED APR 8 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 25 NM
ANZ200-090600-
102 PM EDT WED APR 8 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
A LARGE HIGH PRES SYSTEM BUILDS IN FROM THE W TODAY 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 LATER SAT AND
SUN. THIS HIGH WILL THEN SLIDE EAST OF THE WATERS SUN NIGHT WITH A
WARM FRONT APPROACHING THE WATERS ON MON.
ANZ250-090600-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
102 PM EDT WED APR 8 2026
THIS AFTERNOON
NE WINDS 5 TO 10 KT. SEAS 2 TO 4 FT.
TONIGHT
SE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
2 TO 3 FT.
THU
S WINDS 5 TO 10 KT, BECOMING SE 10 TO 15 KT WITH GUSTS UP
TO 25 KT IN THE AFTERNOON. SEAS 2 TO 3 FT.
THU NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 3 FT.
FRI
SW WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS 3 TO 5 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS
4 TO 6 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 4 TO
6 FT.
SAT NIGHT THROUGH SUN NIGHT
S WINDS 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.
ANZ251-090600-
MASSACHUSETTS BAY AND IPSWICH BAY-
102 PM EDT WED APR 8 2026
THIS AFTERNOON
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
TONIGHT
SE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
AROUND 2 FT.
THU
S WINDS 5 TO 10 KT, BECOMING SE 10 TO 15 KT WITH GUSTS UP
TO 25 KT IN THE AFTERNOON. SEAS 2 TO 3 FT.
THU NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 3 FT.
FRI
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.
FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 4 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
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.
ANZ231-090600-
CAPE COD BAY-
102 PM EDT WED APR 8 2026
THIS AFTERNOON
NE WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT.
TONIGHT
SE WINDS AROUND 5 KT. SEAS AROUND 2 FT.
THU
SE WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
SEAS 1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON.
THU NIGHT
S WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR LESS.
FRI
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.
FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
SAT NIGHT 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.
ANZ254-090600-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
102 PM EDT WED APR 8 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 3 TO 4 FT.
TONIGHT
E WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
SEAS 2 TO 4 FT.
THU
SE WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
SEAS 2 TO 3 FT.
THU NIGHT
SE WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT, BECOMING
S AFTER MIDNIGHT. SEAS 2 TO 3 FT.
FRI
SW WINDS AROUND 5 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS 3 TO 5 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
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 4 TO
6 FT.
SAT NIGHT AND SUN
N WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
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.
ANZ255-090600-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
102 PM EDT WED APR 8 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 3 FT.
TONIGHT
E WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
SEAS 2 TO 3 FT.
THU
E WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
SEAS AROUND 2 FT.
THU NIGHT
SE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
2 TO 4 FT.
FRI
SW WINDS AROUND 5 KT, INCREASING TO 10 TO 15 KT IN THE
AFTERNOON. 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
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 4 TO
6 FT.
SAT NIGHT
N WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
SUN AND SUN NIGHT
E WINDS 5 TO 10 KT, BECOMING S 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.
ANZ256-090600-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
102 PM EDT WED APR 8 2026
THIS AFTERNOON
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT.
TONIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT IN THE EVENING,
THEN 1 FOOT OR LESS.
THU
E 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
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS 3 TO 5 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
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 4 TO
6 FT.
SAT NIGHT THROUGH SUN NIGHT
S 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.
ANZ232-090600-
NANTUCKET SOUND-
102 PM EDT WED APR 8 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT.
TONIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
THU
SE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT
IN THE AFTERNOON.
THU NIGHT
SE WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT.
SEAS AROUND 2 FT.
FRI
SW WINDS AROUND 5 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT
NW WINDS 10 TO 15 KT. SEAS 2 TO 4 FT. A CHANCE OF SHOWERS.
SAT NIGHT 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.
ANZ233-090600-
VINEYARD SOUND-
102 PM EDT WED APR 8 2026
THIS AFTERNOON
NE WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT.
TONIGHT
E 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
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT
NW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
SAT NIGHT 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.
ANZ234-090600-
BUZZARDS BAY-
102 PM EDT WED APR 8 2026
THIS AFTERNOON
NE WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT.
TONIGHT
E WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS.
THU
E WINDS AROUND 5 KT, BECOMING SE IN THE AFTERNOON. SEAS
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON.
THU NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT IN THE EVENING,
THEN 1 FOOT OR LESS.
FRI
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS AROUND 2 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
AROUND 2 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
SAT NIGHT 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.
ANZ235-090600-
RHODE ISLAND SOUND-
102 PM EDT WED APR 8 2026
THIS AFTERNOON
E WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT.
TONIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT IN THE EVENING,
THEN 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
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS 2 TO 4 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
3 TO 4 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. A CHANCE OF SHOWERS.
SAT NIGHT 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.
ANZ237-090600-
BLOCK ISLAND SOUND-
102 PM EDT WED APR 8 2026
THIS AFTERNOON
E WINDS AROUND 10 KT. SEAS AROUND 2 FT.
TONIGHT
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT IN THE EVENING,
THEN 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
SW WINDS AROUND 5 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS 2 TO 4 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
3 TO 5 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT
NW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
SAT NIGHT 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.
ANZ230-090600-
BOSTON HARBOR-
102 PM EDT WED APR 8 2026
THIS AFTERNOON
E WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
TONIGHT
SE WINDS 5 TO 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 2 TO 3 FT
IN THE AFTERNOON.
THU NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
SW 5 TO 10 KT AFTER MIDNIGHT. WAVES AROUND 2 FT IN THE EVENING,
THEN 1 FOOT OR LESS.
FRI
SW WINDS 5 TO 10 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.
FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES
AROUND 2 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT THROUGH SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP 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.
ANZ236-090600-
NARRAGANSETT BAY-
102 PM EDT WED APR 8 2026
THIS AFTERNOON
E WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
TONIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
THU
E WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. WAVES
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON.
THU NIGHT
S WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
FRI
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. WAVES 2 TO 3 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES
2 TO 3 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT THROUGH SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO
20 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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WWW.WEATHER.GOV/BOSTON
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