859
FZUS51 KBOX 010205
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1004 PM EDT THU APR 30 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-011500-
1004 PM EDT THU APR 30 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
HIGH PRESSURE MOVES EAST OF THE COASTAL WATERS WITH THE APPROACH OF
AN AREA OF LOW PRESSURE FROM THE WEST. THE SYSTEM BRINGS WIDESPREAD
RAIN AND AT TIMES POOR VISIBILITY TONIGHT INTO THURSDAY, EVENTUALLY
LIFTING INTO MAINE BY FRIDAY. POTENTIALLY UNSETTLED THIS WEEKEND AS
AN AREA OF LOW PRESSURE MOVES OFF THE COAST OF THE CAROLINAS
SATURDAY AND MOVES NEAR THE BENCHMARK 40N/70W ON SUNDAY.
ANZ250-011500-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
1004 PM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON
OVERNIGHT
W WINDS 5 TO 10 KT. SEAS 4 TO 6 FT. WAVE DETAIL: E
5 FT AT 10 SECONDS AND NE 3 FT AT 6 SECONDS. PATCHY FOG. VSBY
1 TO 3 NM.
FRI
W WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: E 5 FT AT
10 SECONDS AND W 1 FOOT AT 2 SECONDS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E
4 FT AT 9 SECONDS AND W 1 FOOT AT 2 SECONDS.
SAT
S WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E 4 FT AT
9 SECONDS AND SW 1 FOOT AT 2 SECONDS.
SAT NIGHT
S WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E
4 FT AT 9 SECONDS AND S 1 FOOT AT 4 SECONDS. A CHANCE OF SHOWERS.
SUN
N WINDS AROUND 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E 4 FT
AT 9 SECONDS AND N 3 FT AT 3 SECONDS. SHOWERS LIKELY, MAINLY IN
THE MORNING.
SUN NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
AROUND 3 FT.
MON THROUGH TUE
S WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 3 TO 4 FT.
TUE NIGHT
S 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.
ANZ251-011500-
MASSACHUSETTS BAY AND IPSWICH BAY-
1004 PM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY
OVERNIGHT
W WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: E
5 FT AT 10 SECONDS AND SE 2 FT AT 6 SECONDS.
FRI
NW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: E 4 FT
AT 10 SECONDS AND NW 1 FOOT AT 3 SECONDS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: E
4 FT AT 9 SECONDS AND W 1 FOOT AT 2 SECONDS.
SAT
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT AT
9 SECONDS AND SW 1 FOOT AT 2 SECONDS. A CHANCE OF SHOWERS IN THE
AFTERNOON.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: E 3 FT AT 9 SECONDS AND SE 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS.
SUN
N WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NE 3 FT
AT 3 SECONDS AND E 3 FT AT 9 SECONDS. A CHANCE OF SHOWERS.
SUN NIGHT
W WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
MON THROUGH TUE
S WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 2 TO 3 FT.
TUE NIGHT
S 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.
ANZ231-011500-
CAPE COD BAY-
1004 PM EDT THU APR 30 2026
OVERNIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
2 FT AT 10 SECONDS AND NE 1 FOOT AT 5 SECONDS.
FRI
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NW
1 FOOT AT 3 SECONDS AND NE 1 FOOT AT 5 SECONDS.
FRI NIGHT
SW WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 2 FT AT 10 SECONDS AND SW 1 FOOT AT 2 SECONDS.
SAT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
1 FOOT AT 2 SECONDS AND E 1 FOOT AT 4 SECONDS.
SAT NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S
1 FOOT AT 3 SECONDS AND S 1 FOOT AT 8 SECONDS. A CHANCE OF
SHOWERS IN THE EVENING, THEN SHOWERS LIKELY AFTER MIDNIGHT.
SUN
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT
AT 3 SECONDS AND S 1 FOOT AT 9 SECONDS. SHOWERS LIKELY, MAINLY IN
THE MORNING.
SUN NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
MON THROUGH TUE NIGHT
SW WINDS 15 TO 20 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.
ANZ254-011500-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
1004 PM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE FRIDAY NIGHT
OVERNIGHT
W WINDS 5 TO 10 KT. SEAS 4 TO 6 FT. WAVE DETAIL: E
6 FT AT 10 SECONDS AND NE 3 FT AT 5 SECONDS. PATCHY FOG. VSBY
1 TO 3 NM.
FRI
NW WINDS 5 TO 10 KT. SEAS 4 TO 5 FT. WAVE DETAIL: E 5 FT
AT 10 SECONDS AND E 3 FT AT 5 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 TO 3 NM.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: E
5 FT AT 9 SECONDS AND E 2 FT AT 5 SECONDS.
SAT
S WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E 4 FT AT
9 SECONDS AND E 2 FT AT 5 SECONDS.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING E AFTER MIDNIGHT. SEAS
3 TO 4 FT. WAVE DETAIL: E 4 FT AT 9 SECONDS AND S 2 FT AT
5 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS
LIKELY AFTER MIDNIGHT.
SUN
N WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E 4 FT
AT 9 SECONDS AND NE 2 FT AT 3 SECONDS. SHOWERS LIKELY, MAINLY IN
THE MORNING.
SUN NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
3 TO 4 FT.
MON AND MON NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
SEAS 3 TO 5 FT.
TUE AND TUE NIGHT
S 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.
ANZ255-011500-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
1004 PM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE FRIDAY NIGHT
OVERNIGHT
W WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SE
5 FT AT 10 SECONDS AND S 3 FT AT 9 SECONDS. PATCHY FOG. VSBY 1 TO
3 NM.
FRI
NW WINDS AROUND 10 KT, BECOMING W IN THE AFTERNOON. SEAS
3 TO 5 FT. WAVE DETAIL: SE 5 FT AT 10 SECONDS AND SW 3 FT AT
9 SECONDS.
FRI NIGHT
W WINDS 10 TO 15 KT, BECOMING SW 5 TO 10 KT AFTER
MIDNIGHT. SEAS 3 TO 5 FT. WAVE DETAIL: SE 4 FT AT 9 SECONDS AND W
2 FT AT 4 SECONDS.
SAT
S WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E 3 FT AT
9 SECONDS AND SW 2 FT AT 4 SECONDS.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT. SEAS
3 TO 4 FT. WAVE DETAIL: E 3 FT AT 9 SECONDS AND S 2 FT AT
6 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS
LIKELY AFTER MIDNIGHT.
SUN
N WINDS 10 TO 15 KT, BECOMING NW WITH GUSTS UP TO 20 KT IN
THE AFTERNOON. SEAS 3 TO 4 FT. WAVE DETAIL: N 3 FT AT 4 SECONDS
AND E 3 FT AT 9 SECONDS. SHOWERS LIKELY, MAINLY IN THE MORNING.
SUN NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
3 TO 5 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.
TUE AND TUE NIGHT
S WINDS 20 TO 25 KT WITH GUSTS UP 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.
ANZ256-011500-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
1004 PM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE FRIDAY NIGHT
OVERNIGHT
W WINDS 5 TO 10 KT. SEAS 4 TO 5 FT. WAVE DETAIL: E
4 FT AT 10 SECONDS AND SW 3 FT AT 10 SECONDS. A CHANCE OF
SHOWERS. PATCHY FOG WITH VSBY 1 TO 3 NM.
FRI
NW WINDS AROUND 10 KT, BECOMING W IN THE AFTERNOON. SEAS
4 TO 5 FT. WAVE DETAIL: E 4 FT AT 10 SECONDS AND SW 3 FT AT
10 SECONDS.
FRI NIGHT
SW WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT
AFTER MIDNIGHT. SEAS 3 TO 5 FT. WAVE DETAIL: W 3 FT AT 4 SECONDS
AND SE 3 FT AT 9 SECONDS.
SAT
SW WINDS 5 TO 10 KT. SEAS AROUND 3 FT. WAVE DETAIL: E 3 FT
AT 9 SECONDS AND SW 2 FT AT 5 SECONDS.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT. SEAS
AROUND 3 FT. WAVE DETAIL: E 3 FT AT 9 SECONDS AND SW 2 FT AT
4 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS
LIKELY AFTER MIDNIGHT.
SUN
N WINDS 10 TO 15 KT, BECOMING W IN THE AFTERNOON. GUSTS UP
TO 20 KT. SEAS 3 TO 4 FT. WAVE DETAIL: NW 3 FT AT 4 SECONDS AND E
3 FT AT 9 SECONDS. SHOWERS LIKELY, MAINLY IN THE MORNING.
SUN NIGHT
W WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT
AFTER MIDNIGHT. SEAS 3 TO 4 FT.
MON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT.
MON NIGHT THROUGH TUE NIGHT
S WINDS 20 TO 25 KT WITH GUSTS UP
TO 30 KT. SEAS 5 TO 8 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.
ANZ232-011500-
NANTUCKET SOUND-
1004 PM EDT THU APR 30 2026
OVERNIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
2 FT AT 5 SECONDS AND E 2 FT AT 10 SECONDS. PATCHY FOG. VSBY 1 TO
3 NM.
FRI
NW WINDS AROUND 10 KT, BECOMING W IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: E 2 FT AT 5 SECONDS AND E 2 FT AT
10 SECONDS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
2 FT AT 10 SECONDS AND SW 1 FOOT AT 3 SECONDS.
SAT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E 2 FT
AT 9 SECONDS AND SW 1 FOOT AT 4 SECONDS.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING E AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: E 2 FT AT 10 SECONDS AND S 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS
LIKELY AFTER MIDNIGHT.
SUN
N WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT
AT 4 SECONDS AND E 1 FOOT AT 10 SECONDS. SHOWERS LIKELY, MAINLY
IN THE MORNING.
SUN NIGHT
W WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
MON THROUGH TUE NIGHT
S 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.
ANZ233-011500-
VINEYARD SOUND-
1004 PM EDT THU APR 30 2026
OVERNIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: W
1 FOOT AT 2 SECONDS AND SE 1 FOOT AT 4 SECONDS.
FRI
NW WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS AND
E 1 FOOT AT 5 SECONDS.
FRI NIGHT
SW WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT
AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS
AND E 1 FOOT AT 5 SECONDS.
SAT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
2 FT AT 5 SECONDS AND E 1 FOOT AT 4 SECONDS.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: E 2 FT AT 4 SECONDS AND SW 2 FT AT
5 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS
LIKELY AFTER MIDNIGHT.
SUN
N WINDS AROUND 10 KT, BECOMING NW IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: NW 2 FT AT 3 SECONDS AND NE 1 FOOT AT
3 SECONDS. SHOWERS LIKELY, MAINLY IN THE MORNING.
SUN NIGHT
W WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
MON AND MON NIGHT
SW WINDS 15 TO 20 KT, INCREASING TO 20 TO
25 KT. GUSTS UP TO 30 KT. SEAS 2 TO 4 FT.
TUE AND TUE 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.
ANZ234-011500-
BUZZARDS BAY-
1004 PM EDT THU APR 30 2026
OVERNIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 1 FOOT AT 2 SECONDS AND SE 1 FOOT AT 4 SECONDS.
FRI
NW WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT IN THE
AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS
AND E 1 FOOT AT 5 SECONDS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 2 FT AT 4 SECONDS AND E 1 FOOT AT 5 SECONDS.
SAT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
1 FOOT AT 4 SECONDS AND E 1 FOOT AT 4 SECONDS.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: E 2 FT AT 4 SECONDS AND SW 1 FOOT AT
4 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS
LIKELY AFTER MIDNIGHT.
SUN
NW WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: NE
1 FOOT AT 3 SECONDS AND W 1 FOOT AT 4 SECONDS. SHOWERS LIKELY,
MAINLY IN THE MORNING.
SUN NIGHT
W WINDS 10 TO 15 KT. SEAS AROUND 2 FT.
MON AND MON NIGHT
SW WINDS 15 TO 20 KT, INCREASING TO 20 TO
25 KT. GUSTS UP TO 30 KT. SEAS 2 TO 4 FT.
TUE AND TUE 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.
ANZ235-011500-
RHODE ISLAND SOUND-
1004 PM EDT THU APR 30 2026
OVERNIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
3 FT AT 10 SECONDS AND S 2 FT AT 5 SECONDS. A CHANCE OF SHOWERS.
FRI
NW WINDS AROUND 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
2 TO 4 FT. WAVE DETAIL: SE 3 FT AT 10 SECONDS AND W 2 FT AT
3 SECONDS.
FRI NIGHT
SW WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT
AFTER MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: SE 3 FT AT 9 SECONDS
AND SW 2 FT AT 4 SECONDS.
SAT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT
AT 5 SECONDS AND SE 2 FT AT 9 SECONDS. A CHANCE OF SHOWERS IN THE
AFTERNOON.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 5 SECONDS AND SE 2 FT AT
9 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS
LIKELY AFTER MIDNIGHT.
SUN
N WINDS 10 TO 15 KT, BECOMING NW IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: NW 2 FT AT 4 SECONDS AND SE 2 FT AT
9 SECONDS. SHOWERS LIKELY, MAINLY IN THE MORNING.
SUN NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT.
MON
SW WINDS 20 TO 25 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.
TUE AND TUE 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.
ANZ237-011500-
BLOCK ISLAND SOUND-
1004 PM EDT THU APR 30 2026
OVERNIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE
3 FT AT 10 SECONDS AND NE 1 FOOT AT 3 SECONDS. A SLIGHT CHANCE OF
SHOWERS.
FRI
NW WINDS AROUND 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
2 TO 4 FT. WAVE DETAIL: SE 3 FT AT 10 SECONDS AND W 2 FT AT
3 SECONDS.
FRI NIGHT
SW WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT
AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 9 SECONDS
AND SW 2 FT AT 3 SECONDS.
SAT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT
AT 9 SECONDS AND SW 1 FOOT AT 5 SECONDS. A CHANCE OF SHOWERS IN
THE AFTERNOON.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 9 SECONDS AND S 1 FOOT AT
4 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS
LIKELY AFTER MIDNIGHT.
SUN
NW WINDS AROUND 10 KT, BECOMING W IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: NW 2 FT AT 3 SECONDS AND SE 2 FT AT
9 SECONDS. A CHANCE OF SHOWERS.
SUN NIGHT
W WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT.
MON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
4 FT.
MON NIGHT
SW WINDS AROUND 20 KT WITH GUSTS UP TO 30 KT. SEAS
3 TO 5 FT.
TUE AND TUE 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.
ANZ230-011500-
BOSTON HARBOR-
1004 PM EDT THU APR 30 2026
OVERNIGHT
W WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS, EXCEPT
2 TO 4 FT AT THE OUTER HARBOR ENTRANCE.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
FRI NIGHT
W WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS.
SAT
SW WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. WAVES
1 FOOT OR LESS. A CHANCE OF SHOWERS IN THE AFTERNOON.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. WAVES
1 FOOT OR LESS. A CHANCE OF SHOWERS.
SUN
N WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS. A CHANCE OF
SHOWERS.
SUN NIGHT
W WINDS AROUND 10 KT. WAVES AROUND 2 FT.
MON THROUGH TUE NIGHT
S WINDS 20 TO 25 KT WITH GUSTS UP TO
30 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.
ANZ236-011500-
NARRAGANSETT BAY-
1004 PM EDT THU APR 30 2026
OVERNIGHT
W WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
FRI
NW WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. WAVES
AROUND 2 FT.
FRI NIGHT
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
SAT
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS IN THE AFTERNOON.
SAT NIGHT AND SUN
NW WINDS 5 TO 10 KT. WAVES AROUND 2 FT. A
CHANCE OF SHOWERS.
SUN NIGHT
W WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
MON THROUGH TUE
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
WAVES 2 TO 4 FT.
TUE NIGHT
SW WINDS 20 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.
ANZ280-011500-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
1004 PM EDT THU APR 30 2026
OVERNIGHT
W WINDS 5 TO 10 KT. SEAS 5 TO 6 FT. WAVE DETAIL: E
6 FT AT 10 SECONDS AND NE 1 FOOT AT 5 SECONDS. PATCHY FOG. VSBY
1 TO 3 NM, DECREASING TO 1 NM OR LESS.
FRI
W WINDS 5 TO 10 KT. SEAS 4 TO 5 FT. WAVE DETAIL: E 5 FT AT
10 SECONDS AND W 1 FOOT AT 3 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 NM OR LESS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 4 FT. WAVE DETAIL:
E 4 FT AT 9 SECONDS AND W 1 FOOT AT 2 SECONDS.
SAT
S WINDS 5 TO 10 KT. SEAS AROUND 4 FT. WAVE DETAIL: E 4 FT
AT 9 SECONDS AND S 1 FOOT AT 3 SECONDS.
SAT NIGHT
S WINDS AROUND 10 KT. SEAS AROUND 4 FT. WAVE DETAIL:
E 4 FT AT 9 SECONDS AND S 2 FT AT 4 SECONDS. SHOWERS LIKELY AFTER
MIDNIGHT.
SUN
NE WINDS 10 TO 15 KT, BECOMING N IN THE AFTERNOON. SEAS
3 TO 4 FT. WAVE DETAIL: E 4 FT AT 9 SECONDS AND S 2 FT AT
3 SECONDS. SHOWERS LIKELY.
SUN NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
3 TO 4 FT.
MON THROUGH TUE
S WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT.
SEAS 4 TO 6 FT.
TUE NIGHT
S WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS
5 TO 8 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.
ANZ281-011500-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
1004 PM EDT THU APR 30 2026
OVERNIGHT
W WINDS 5 TO 10 KT. SEAS 5 TO 6 FT. WAVE DETAIL: E
6 FT AT 10 SECONDS AND E 3 FT AT 5 SECONDS. PATCHY FOG. VSBY 1 NM
OR LESS.
FRI
NW WINDS 5 TO 10 KT. SEAS 5 TO 6 FT. WAVE DETAIL: E 5 FT
AT 10 SECONDS AND E 3 FT AT 5 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 NM OR LESS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS 4 TO 5 FT. WAVE DETAIL: E
5 FT AT 9 SECONDS AND E 2 FT AT 5 SECONDS.
SAT
SW WINDS 5 TO 10 KT. SEAS 4 TO 5 FT. WAVE DETAIL: E 4 FT
AT 9 SECONDS AND E 2 FT AT 5 SECONDS.
SAT NIGHT
S WINDS AROUND 10 KT, BECOMING E AFTER MIDNIGHT.
SEAS 4 TO 5 FT. WAVE DETAIL: E 4 FT AT 9 SECONDS AND E 2 FT AT
5 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS
LIKELY AFTER MIDNIGHT.
SUN
NE WINDS 10 TO 15 KT, BECOMING NW IN THE AFTERNOON. GUSTS
UP TO 20 KT. SEAS AROUND 4 FT. WAVE DETAIL: E 4 FT AT 9 SECONDS
AND N 3 FT AT 4 SECONDS. SHOWERS LIKELY.
SUN NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
4 TO 6 FT.
MON AND MON NIGHT
SW WINDS 15 TO 20 KT, INCREASING TO 20 TO
25 KT. GUSTS UP TO 30 KT. SEAS 4 TO 6 FT.
TUE AND TUE NIGHT
S WINDS 20 TO 25 KT WITH GUSTS UP 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.
ANZ282-011500-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
1004 PM EDT THU APR 30 2026
OVERNIGHT
NW WINDS 5 TO 10 KT. SEAS 5 TO 6 FT. WAVE DETAIL: E
6 FT AT 10 SECONDS AND S 1 FOOT AT 3 SECONDS. PATCHY FOG. VSBY
1 NM OR LESS.
FRI
W WINDS AROUND 10 KT. SEAS AROUND 5 FT. WAVE DETAIL: E
5 FT AT 10 SECONDS AND NW 2 FT AT 3 SECONDS.
FRI NIGHT
SW WINDS AROUND 10 KT. SEAS 4 TO 5 FT. WAVE DETAIL:
E 4 FT AT 9 SECONDS AND W 2 FT AT 4 SECONDS.
SAT
S WINDS 5 TO 10 KT. SEAS 4 TO 5 FT. WAVE DETAIL: E 4 FT AT
9 SECONDS AND SW 2 FT AT 6 SECONDS.
SAT NIGHT
SE WINDS 5 TO 10 KT, BECOMING NE 10 TO 15 KT AFTER
MIDNIGHT. SEAS AROUND 4 FT. WAVE DETAIL: E 4 FT AT 9 SECONDS AND
SW 2 FT AT 6 SECONDS. SHOWERS.
SUN
N WINDS AROUND 15 KT, BECOMING NW IN THE AFTERNOON. GUSTS
UP TO 20 KT. SEAS 4 TO 5 FT. WAVE DETAIL: E 5 FT AT 9 SECONDS AND
N 4 FT AT 5 SECONDS. SHOWERS, MAINLY IN THE MORNING.
SUN NIGHT
W WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT
AFTER MIDNIGHT. GUSTS UP TO 25 KT. SEAS 4 TO 6 FT.
MON AND MON NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 4 TO 6 FT.
TUE AND TUE NIGHT
S WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 5 TO 8 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.
ANZ283-011500-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
1004 PM EDT THU APR 30 2026
OVERNIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 5 FT. WAVE DETAIL:
E 5 FT AT 10 SECONDS AND S 3 FT AT 10 SECONDS. PATCHY FOG. A
SLIGHT CHANCE OF SHOWERS WITH VSBY 1 TO 3 NM.
FRI
W WINDS 10 TO 15 KT. SEAS AROUND 5 FT. WAVE DETAIL: E 5 FT
AT 10 SECONDS AND W 4 FT AT 10 SECONDS.
FRI NIGHT
SW WINDS 10 TO 15 KT. SEAS 4 TO 5 FT. WAVE DETAIL: E
4 FT AT 9 SECONDS AND W 2 FT AT 4 SECONDS.
SAT
S WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E 3 FT AT
9 SECONDS AND SW 2 FT AT 5 SECONDS. A CHANCE OF SHOWERS IN THE
AFTERNOON.
SAT NIGHT
SE WINDS 5 TO 10 KT, BECOMING NE 10 TO 15 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: E 3 FT AT 9 SECONDS AND SW
1 FOOT AT 4 SECONDS. SHOWERS LIKELY.
SUN
N WINDS 10 TO 15 KT, BECOMING NW IN THE AFTERNOON. GUSTS
UP TO 20 KT. SEAS 4 TO 5 FT. WAVE DETAIL: N 4 FT AT 5 SECONDS AND
E 4 FT AT 9 SECONDS. SHOWERS LIKELY, MAINLY IN THE MORNING.
SUN NIGHT
W WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT
AFTER MIDNIGHT. GUSTS UP TO 25 KT. SEAS 4 TO 5 FT.
MON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
5 FT.
MON NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
5 TO 8 FT.
TUE AND TUE NIGHT
S WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 6 TO 9 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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