454
FZUS51 KBOX 090202
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1002 PM EDT WED APR 8 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 25 NM
ANZ200-091500-
1002 PM EDT WED APR 8 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
A LARGE HIGH PRES 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 E OF
THE WATERS SUN NIGHT, WITH A WARM FRONT APPROACHING THE WATERS ON
MON.
ANZ250-091500-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
1002 PM EDT WED APR 8 2026
OVERNIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
THU
S WINDS 5 TO 10 KT, BECOMING SE 15 TO 20 KT WITH GUSTS UP
TO 25 KT IN THE AFTERNOON. SEAS 2 TO 3 FT.
THU NIGHT
S WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT
AFTER MIDNIGHT. GUSTS UP TO 25 KT. SEAS 2 TO 3 FT.
FRI
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING S
15 TO 20 KT WITH GUSTS UP TO 30 KT IN THE AFTERNOON. SEAS 3 TO
5 FT.
FRI NIGHT
SW WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT
AFTER MIDNIGHT. 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, DIMINISHING
TO 5 TO 10 KT IN THE AFTERNOON. SEAS 4 TO 5 FT. A CHANCE OF
SHOWERS IN THE MORNING.
SAT NIGHT
NW WINDS 5 TO 10 KT. SEAS 3 TO 5 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 4 FT.
MON
S WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
6 FT.
MON NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
4 TO 6 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.
ANZ251-091500-
MASSACHUSETTS BAY AND IPSWICH BAY-
1002 PM EDT WED APR 8 2026
OVERNIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
THU
S WINDS 5 TO 10 KT, BECOMING SE 15 TO 20 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
S WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
SEAS 2 TO 3 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 4 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT
NW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. A CHANCE OF SHOWERS
IN THE MORNING.
SAT NIGHT
NW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT.
SUN THROUGH MON NIGHT
SW WINDS 20 TO 25 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.
ANZ231-091500-
CAPE COD BAY-
1002 PM EDT WED APR 8 2026
OVERNIGHT
SE WINDS AROUND 5 KT. SEAS AROUND 2 FT.
THU
SE WINDS AROUND 5 KT, INCREASING TO AROUND 10 KT WITH
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.
FRI
SW WINDS 5 TO 10 KT, INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 2 TO 4 FT.
FRI 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 AFTER MIDNIGHT.
SAT AND SAT NIGHT
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
SUN THROUGH MON NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO
30 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.
ANZ254-091500-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
1002 PM EDT WED APR 8 2026
OVERNIGHT
E WINDS AROUND 5 KT. SEAS 2 TO 3 FT.
THU
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
THU NIGHT
S WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 2 TO 3 FT.
FRI
SW WINDS 5 TO 10 KT, INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 3 TO 5 FT.
FRI NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
4 TO 6 FT.
SAT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING NW IN
THE AFTERNOON. SEAS 4 TO 6 FT.
SAT NIGHT
N WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
SUN AND SUN NIGHT
W WINDS 5 TO 10 KT, BECOMING S 15 TO 20 KT.
SEAS 2 TO 4 FT.
MON AND MON NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 4 TO 6 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.
ANZ255-091500-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
1002 PM EDT WED APR 8 2026
OVERNIGHT
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
THU
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
THU NIGHT
SE WINDS AROUND 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.
SAT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING NW IN
THE AFTERNOON. SEAS 4 TO 6 FT.
SAT NIGHT
N WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
SUN AND SUN NIGHT
W WINDS 5 TO 10 KT, BECOMING S 15 TO 20 KT.
SEAS 2 TO 4 FT.
MON
S WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
6 FT.
MON NIGHT
SW WINDS 25 TO 30 KT. SEAS 5 TO 7 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.
ANZ256-091500-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
1002 PM EDT WED APR 8 2026
OVERNIGHT
SE WINDS AROUND 10 KT, BECOMING E. SEAS AROUND 2 FT.
THU
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
THU NIGHT
SE WINDS AROUND 10 KT, BECOMING SW 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 AROUND 15 KT WITH GUSTS UP TO 20 KT. SEAS
4 TO 6 FT.
SAT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING NW
5 TO 10 KT IN THE AFTERNOON. SEAS 4 TO 6 FT.
SAT NIGHT
N WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
SUN AND SUN NIGHT
SW WINDS 5 TO 10 KT, BECOMING S 15 TO 20 KT.
SEAS 3 TO 4 FT.
MON
S WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
6 FT.
MON NIGHT
SW WINDS 25 TO 30 KT. SEAS 6 TO 7 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.
ANZ232-091500-
NANTUCKET SOUND-
1002 PM EDT WED APR 8 2026
OVERNIGHT
E WINDS AROUND 5 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
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
FRI
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 30 KT IN THE AFTERNOON. SEAS 2 TO 3 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 4 FT.
SAT AND SAT NIGHT
N WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
SUN THROUGH MON
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 2 TO 4 FT.
MON NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 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.
ANZ233-091500-
VINEYARD SOUND-
1002 PM EDT WED APR 8 2026
OVERNIGHT
SE WINDS AROUND 5 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.
FRI
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 30 KT IN THE AFTERNOON. SEAS 2 TO 4 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 4 FT.
SAT AND SAT NIGHT
N WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
SUN AND SUN NIGHT
SW WINDS 5 TO 10 KT, BECOMING S 15 TO 20 KT.
SEAS 2 TO 3 FT.
MON AND MON NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 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.
ANZ234-091500-
BUZZARDS BAY-
1002 PM EDT WED APR 8 2026
OVERNIGHT
SE WINDS AROUND 5 KT. SEAS 1 FOOT OR LESS.
THU
SE WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON.
THU NIGHT
S WINDS AROUND 10 KT. SEAS AROUND 2 FT IN THE
EVENING, THEN 1 FOOT OR LESS.
FRI
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT, INCREASING TO
30 KT IN THE AFTERNOON. SEAS 2 TO 4 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 4 FT.
SAT AND SAT NIGHT
N WINDS 10 TO 15 KT. SEAS AROUND 2 FT.
SUN THROUGH MON NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO
30 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.
ANZ235-091500-
RHODE ISLAND SOUND-
1002 PM EDT WED APR 8 2026
OVERNIGHT
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
S WINDS AROUND 10 KT. SEAS AROUND 2 FT.
FRI
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
SEAS 2 TO 4 FT.
FRI NIGHT
SW WINDS AROUND 15 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 4 FT.
SAT AND SAT NIGHT
N WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
SUN AND SUN NIGHT
SW WINDS 5 TO 10 KT, BECOMING S 15 TO 20 KT.
SEAS 2 TO 3 FT.
MON AND MON NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 4 TO 6 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.
ANZ237-091500-
BLOCK ISLAND SOUND-
1002 PM EDT WED APR 8 2026
OVERNIGHT
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
S WINDS 5 TO 10 KT. 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.
SAT AND SAT NIGHT
N WINDS 5 TO 10 KT. SEAS 2 TO 4 FT.
SUN AND SUN NIGHT
SW WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT
WITH GUSTS UP TO 20 KT. SEAS 2 TO 3 FT.
MON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT.
MON NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
4 TO 6 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.
ANZ230-091500-
BOSTON HARBOR-
1002 PM EDT WED APR 8 2026
OVERNIGHT
S WINDS 5 TO 10 KT. WAVES AROUND 2 FT, THEN 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
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. WAVES AROUND 2 FT.
FRI
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
WAVES AROUND 2 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE
EVENING. WAVES AROUND 2 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT
NW WINDS 10 TO 15 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS IN THE MORNING.
SAT NIGHT
NW WINDS 5 TO 10 KT. WAVES AROUND 2 FT IN THE
EVENING, THEN 1 FOOT OR LESS.
SUN THROUGH MON NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO
25 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.
ANZ236-091500-
NARRAGANSETT BAY-
1002 PM EDT WED APR 8 2026
OVERNIGHT
S WINDS AROUND 5 KT. WAVES 1 FOOT OR LESS.
THU
SE WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS, THEN AROUND
2 FT IN THE AFTERNOON.
THU NIGHT
S WINDS 5 TO 10 KT. WAVES AROUND 2 FT IN THE
EVENING, THEN 1 FOOT OR LESS.
FRI
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. WAVES 2 TO 3 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. WAVES 2 TO 3 FT.
SAT AND SAT NIGHT
N WINDS 5 TO 10 KT. WAVES 2 TO 3 FT.
SUN AND SUN NIGHT
SW WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT
WITH GUSTS UP TO 20 KT. WAVES AROUND 2 FT.
MON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. WAVES 2 TO
4 FT.
MON NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. WAVES
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.
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