315
FZUS51 KBOX 301704
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
104 PM EDT THU APR 30 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-010600-
104 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.
ANZ250-010600-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
104 PM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY MORNING
THIS AFTERNOON
W WINDS AROUND 5 KT. SEAS 4 TO 6 FT. WAVE
DETAIL: E 6 FT AT 10 SECONDS AND E 2 FT AT 6 SECONDS. PATCHY FOG.
A CHANCE OF SHOWERS. VSBY 1 NM OR LESS.
TONIGHT
SW WINDS AROUND 5 KT, BECOMING W AFTER MIDNIGHT. SEAS
4 TO 6 FT. WAVE DETAIL: E 6 FT AT 10 SECONDS AND NE 2 FT AT
6 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM.
FRI
W WINDS 5 TO 10 KT. SEAS 4 TO 5 FT. WAVE DETAIL: E 5 FT AT
10 SECONDS AND SW 2 FT AT 3 SECONDS.
FRI NIGHT
W WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E
4 FT AT 9 SECONDS AND W 2 FT AT 3 SECONDS.
SAT
W WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
3 TO 4 FT. WAVE DETAIL: E 4 FT AT 9 SECONDS AND W 1 FOOT AT
4 SECONDS.
SAT NIGHT
S WINDS AROUND 10 KT, BECOMING SW AFTER MIDNIGHT.
SEAS 3 TO 4 FT. WAVE DETAIL: E 4 FT AT 10 SECONDS AND S 2 FT AT
4 SECONDS. A CHANCE OF RAIN.
SUN
N WINDS AROUND 10 KT. SEAS AROUND 3 FT. A CHANCE OF RAIN.
SUN NIGHT THROUGH MON NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP
TO 30 KT. SEAS 3 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.
ANZ251-010600-
MASSACHUSETTS BAY AND IPSWICH BAY-
104 PM EDT THU APR 30 2026
THIS AFTERNOON
W WINDS AROUND 5 KT. SEAS 3 TO 5 FT. WAVE
DETAIL: E 5 FT AT 10 SECONDS AND E 2 FT AT 6 SECONDS. PATCHY FOG.
A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
TONIGHT
SW WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT. SEAS
3 TO 5 FT. WAVE DETAIL: E 5 FT AT 10 SECONDS AND E 2 FT AT
6 SECONDS. PATCHY FOG IN THE EVENING.
FRI
NW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E 4 FT
AT 10 SECONDS AND SW 2 FT AT 3 SECONDS.
FRI NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: E
4 FT AT 9 SECONDS AND W 3 FT AT 4 SECONDS.
SAT
W WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: E 3 FT AT 9 SECONDS AND W 1 FOOT AT
5 SECONDS. A CHANCE OF RAIN IN THE AFTERNOON.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: E 3 FT AT 10 SECONDS AND S 2 FT AT
4 SECONDS. A CHANCE OF RAIN.
SUN
N WINDS AROUND 10 KT. SEAS 2 TO 3 FT. A CHANCE OF RAIN.
SUN NIGHT THROUGH MON NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP
TO 25 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.
ANZ231-010600-
CAPE COD BAY-
104 PM EDT THU APR 30 2026
THIS AFTERNOON
W WINDS AROUND 5 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: NE 2 FT AT 11 SECONDS AND E 1 FOOT AT 5 SECONDS. PATCHY
FOG. A CHANCE OF SHOWERS. VSBY 1 NM OR LESS.
TONIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NE
2 FT AT 11 SECONDS AND SW 1 FOOT AT 2 SECONDS. PATCHY FOG.
FRI
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NW
1 FOOT AT 3 SECONDS AND E 1 FOOT AT 6 SECONDS.
FRI NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 1 FOOT AT 2 SECONDS AND E 1 FOOT AT 5 SECONDS.
SAT
W WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: W 1 FOOT AT 3 SECONDS AND SE 1 FOOT AT
5 SECONDS.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: S 1 FOOT AT 2 SECONDS AND SE 1 FOOT AT
6 SECONDS. A CHANCE OF RAIN IN THE EVENING, THEN RAIN LIKELY
AFTER MIDNIGHT.
SUN
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A CHANCE OF RAIN.
SUN NIGHT THROUGH MON NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP
TO 25 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.
ANZ254-010600-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
104 PM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING
THIS AFTERNOON
SW WINDS AROUND 5 KT. SEAS 5 TO 6 FT. WAVE
DETAIL: E 6 FT AT 10 SECONDS AND E 3 FT AT 5 SECONDS. PATCHY FOG.
A CHANCE OF SHOWERS. VSBY 1 NM OR LESS.
TONIGHT
W WINDS 5 TO 10 KT. SEAS 4 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, INCREASING TO 1 TO 3 NM AFTER MIDNIGHT.
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
W WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: E
5 FT AT 9 SECONDS AND SW 2 FT AT 4 SECONDS.
SAT
W WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS 3 TO
4 FT. WAVE DETAIL: E 4 FT AT 9 SECONDS AND SW 1 FOOT AT
6 SECONDS.
SAT NIGHT
S WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E
4 FT AT 10 SECONDS AND S 2 FT AT 5 SECONDS. A CHANCE OF RAIN IN
THE EVENING, THEN RAIN LIKELY AFTER MIDNIGHT.
SUN
NW WINDS AROUND 10 KT. SEAS 3 TO 4 FT. RAIN LIKELY.
SUN NIGHT THROUGH MON NIGHT
SW 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.
ANZ255-010600-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
104 PM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING
THIS AFTERNOON
SW WINDS AROUND 5 KT. SEAS 4 TO 6 FT. WAVE
DETAIL: SE 5 FT AT 10 SECONDS AND SE 3 FT AT 5 SECONDS. PATCHY
FOG. A CHANCE OF SHOWERS. VSBY 1 NM OR LESS.
TONIGHT
W WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SE
5 FT AT 10 SECONDS AND W 2 FT AT 5 SECONDS. PATCHY FOG. VSBY 1 NM
OR LESS, INCREASING TO 1 TO 3 NM AFTER MIDNIGHT.
FRI
W WINDS AROUND 10 KT. SEAS 4 TO 5 FT. WAVE DETAIL: SE 5 FT
AT 10 SECONDS AND W 3 FT AT 4 SECONDS.
FRI NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
DIMINISHING TO 5 TO 10 KT AFTER MIDNIGHT. SEAS 3 TO 5 FT. WAVE
DETAIL: SE 4 FT AT 9 SECONDS AND W 3 FT AT 5 SECONDS.
SAT
W WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS 3 TO
4 FT. WAVE DETAIL: SE 3 FT AT 9 SECONDS AND SW 2 FT AT 5 SECONDS.
SAT NIGHT
S WINDS AROUND 10 KT, BECOMING NE AFTER MIDNIGHT.
SEAS 3 TO 4 FT. WAVE DETAIL: SE 3 FT AT 10 SECONDS AND S 2 FT AT
6 SECONDS. RAIN LIKELY.
SUN
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. RAIN LIKELY.
SUN NIGHT
W WINDS 15 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 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.
ANZ256-010600-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
104 PM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING
THIS AFTERNOON
SW WINDS AROUND 5 KT. SEAS 4 TO 5 FT. WAVE
DETAIL: SE 5 FT AT 10 SECONDS AND SE 2 FT AT 6 SECONDS. PATCHY
FOG. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
TONIGHT
W WINDS 5 TO 10 KT. SEAS 4 TO 5 FT. WAVE DETAIL: SE
5 FT AT 10 SECONDS AND E 3 FT AT 5 SECONDS. PATCHY FOG AFTER
MIDNIGHT WITH VSBY 1 NM OR LESS.
FRI
NW WINDS AROUND 10 KT, BECOMING W IN THE AFTERNOON. SEAS
4 TO 5 FT. WAVE DETAIL: SE 4 FT AT 10 SECONDS AND NW 3 FT AT
4 SECONDS.
FRI NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING W 5 TO 10 KT AFTER MIDNIGHT. SEAS 3 TO 5 FT. WAVE
DETAIL: SW 3 FT AT 4 SECONDS AND SE 3 FT AT 9 SECONDS.
SAT
SW WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS
3 TO 4 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS AND E 3 FT AT
9 SECONDS. A CHANCE OF RAIN IN THE AFTERNOON.
SAT NIGHT
S WINDS AROUND 10 KT, BECOMING NW AFTER MIDNIGHT.
SEAS AROUND 3 FT. WAVE DETAIL: SE 3 FT AT 9 SECONDS AND S 2 FT AT
5 SECONDS. A CHANCE OF RAIN IN THE EVENING, THEN RAIN LIKELY
AFTER MIDNIGHT.
SUN
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. A CHANCE OF RAIN.
SUN NIGHT THROUGH 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.
ANZ232-010600-
NANTUCKET SOUND-
104 PM EDT THU APR 30 2026
THIS AFTERNOON
SW WINDS AROUND 5 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: E 2 FT AT 5 SECONDS AND E 2 FT AT 10 SECONDS. PATCHY FOG.
A CHANCE OF SHOWERS. VSBY 1 NM OR LESS.
TONIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 4 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 4 FT. WAVE DETAIL: W 2 FT AT 3 SECONDS AND E 2 FT AT
5 SECONDS.
FRI NIGHT
W WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: W 2 FT AT 4 SECONDS AND E
2 FT AT 10 SECONDS.
SAT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: W 1 FOOT
AT 4 SECONDS AND E 1 FOOT AT 5 SECONDS.
SAT NIGHT
S WINDS AROUND 10 KT, BECOMING W AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 1 FOOT AT 3 SECONDS AND E 1 FOOT
AT 5 SECONDS. A CHANCE OF RAIN IN THE EVENING, THEN RAIN LIKELY
AFTER MIDNIGHT.
SUN
NW WINDS AROUND 10 KT. SEAS 2 TO 3 FT. RAIN LIKELY.
SUN NIGHT THROUGH MON NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP
TO 25 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.
ANZ233-010600-
VINEYARD SOUND-
104 PM EDT THU APR 30 2026
THIS AFTERNOON
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SW 1 FOOT AT 2 SECONDS AND SE 1 FOOT AT 5 SECONDS. A
CHANCE OF SHOWERS.
TONIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW
1 FOOT AT 2 SECONDS AND SE 1 FOOT AT 5 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 3 FT AT 4 SECONDS AND
SE 1 FOOT AT 7 SECONDS.
FRI NIGHT
W WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND E
1 FOOT AT 8 SECONDS.
SAT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
2 FT AT 5 SECONDS AND SE 1 FOOT AT 7 SECONDS. A CHANCE OF RAIN IN
THE AFTERNOON.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND SE 1 FOOT AT
9 SECONDS. A CHANCE OF RAIN IN THE EVENING, THEN RAIN LIKELY
AFTER MIDNIGHT.
SUN
NW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. RAIN LIKELY.
SUN NIGHT 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.
ANZ234-010600-
BUZZARDS BAY-
104 PM EDT THU APR 30 2026
THIS AFTERNOON
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 1 FOOT AT 2 SECONDS AND SE 1 FOOT AT 5 SECONDS. PATCHY
FOG. A CHANCE OF SHOWERS.
TONIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
1 FOOT AT 2 SECONDS AND SE 1 FOOT AT 5 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 4 SECONDS AND
E 1 FOOT AT 7 SECONDS.
FRI NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 2 FT AT 4 SECONDS AND E 1 FOOT AT 9 SECONDS.
SAT
SW WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT IN THE
AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS
AND SE 1 FOOT AT 10 SECONDS. A CHANCE OF RAIN IN THE AFTERNOON.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 5 SECONDS AND SE 1 FOOT AT
10 SECONDS. A CHANCE OF RAIN IN THE EVENING, THEN RAIN LIKELY
AFTER MIDNIGHT.
SUN
NW WINDS 10 TO 15 KT. SEAS AROUND 2 FT. A CHANCE OF RAIN.
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.
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.
ANZ235-010600-
RHODE ISLAND SOUND-
104 PM EDT THU APR 30 2026
THIS AFTERNOON
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SE 3 FT AT 10 SECONDS AND S 2 FT AT 4 SECONDS. PATCHY
FOG. A CHANCE OF SHOWERS.
TONIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE
3 FT AT 10 SECONDS AND W 2 FT AT 3 SECONDS. PATCHY FOG AFTER
MIDNIGHT.
FRI
NW WINDS AROUND 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
3 TO 4 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND SE 3 FT AT
10 SECONDS.
FRI NIGHT
W WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND
SE 3 FT AT 10 SECONDS.
SAT
W WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS 2 TO
3 FT. WAVE DETAIL: S 2 FT AT 5 SECONDS AND SE 2 FT AT 9 SECONDS.
A CHANCE OF RAIN IN THE AFTERNOON.
SAT NIGHT
S WINDS AROUND 10 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND SE 2 FT AT
9 SECONDS. A CHANCE OF RAIN IN THE EVENING, THEN RAIN LIKELY
AFTER MIDNIGHT.
SUN
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. A CHANCE OF RAIN.
SUN NIGHT 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.
ANZ237-010600-
BLOCK ISLAND SOUND-
104 PM EDT THU APR 30 2026
THIS AFTERNOON
SW WINDS AROUND 5 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: SE 4 FT AT 10 SECONDS AND E 2 FT AT 6 SECONDS. PATCHY
FOG. A SLIGHT CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
TONIGHT
W WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SE
3 FT AT 10 SECONDS AND W 2 FT AT 3 SECONDS.
FRI
NW WINDS AROUND 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
3 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, BECOMING W 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
W WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS 2 TO
3 FT. WAVE DETAIL: SE 2 FT AT 9 SECONDS AND SW 1 FOOT AT
5 SECONDS. A CHANCE OF RAIN IN THE AFTERNOON.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 9 SECONDS AND S 1 FOOT AT
5 SECONDS. A CHANCE OF RAIN.
SUN
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. A CHANCE OF RAIN.
SUN NIGHT THROUGH MON 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.
ANZ230-010600-
BOSTON HARBOR-
104 PM EDT THU APR 30 2026
THIS AFTERNOON
S WINDS AROUND 5 KT. WAVES 1 FOOT OR LESS.
PATCHY FOG. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
TONIGHT
SW WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS, THEN AROUND 2 FT AFTER MIDNIGHT.
FRI
NW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
FRI NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
SAT
W WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. WAVES
1 FOOT OR LESS. A CHANCE OF RAIN IN THE AFTERNOON.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. WAVES
1 FOOT OR LESS. A CHANCE OF RAIN.
SUN
NW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS. A CHANCE OF
RAIN.
SUN NIGHT 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.
ANZ236-010600-
NARRAGANSETT BAY-
104 PM EDT THU APR 30 2026
THIS AFTERNOON
SW WINDS AROUND 5 KT. WAVES AROUND 2 FT. A
CHANCE OF SHOWERS.
TONIGHT
SW WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
WAVES AROUND 2 FT.
FRI
NW WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. WAVES
AROUND 2 FT.
FRI NIGHT
W WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
SAT
W WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. WAVES
AROUND 2 FT. A CHANCE OF RAIN IN THE AFTERNOON.
SAT NIGHT
S WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
WAVES AROUND 2 FT. A CHANCE OF RAIN.
SUN
NW WINDS 10 TO 15 KT. WAVES AROUND 2 FT. A CHANCE OF RAIN.
SUN NIGHT THROUGH MON NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP
TO 25 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.
ANZ280-010600-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
104 PM EDT THU APR 30 2026
THIS AFTERNOON
SW WINDS 5 TO 10 KT. SEAS 6 TO 7 FT. WAVE
DETAIL: E 7 FT AT 10 SECONDS AND NE 1 FOOT AT 5 SECONDS. PATCHY
FOG. SHOWERS LIKELY. VSBY 1 NM OR LESS.
TONIGHT
W WINDS 5 TO 10 KT. SEAS 5 TO 6 FT. WAVE DETAIL: E
6 FT AT 10 SECONDS AND W 1 FOOT AT 2 SECONDS. PATCHY FOG. VSBY
1 NM OR LESS, INCREASING TO 1 TO 3 NM AFTER MIDNIGHT.
FRI
W WINDS 5 TO 10 KT. SEAS AROUND 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, BECOMING W AFTER MIDNIGHT. SEAS
4 TO 5 FT. WAVE DETAIL: E 4 FT AT 9 SECONDS AND SW 1 FOOT AT
3 SECONDS.
SAT
W WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 4 FT. WAVE DETAIL: E 4 FT AT 9 SECONDS AND W 1 FOOT AT
4 SECONDS.
SAT NIGHT
S WINDS AROUND 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E
4 FT AT 10 SECONDS AND SW 2 FT AT 6 SECONDS. A CHANCE OF RAIN.
SUN
N WINDS AROUND 10 KT. SEAS 3 TO 4 FT. A CHANCE OF RAIN.
SUN NIGHT THROUGH MON NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP
TO 35 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.
ANZ281-010600-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
104 PM EDT THU APR 30 2026
THIS AFTERNOON
SW WINDS AROUND 5 KT. SEAS 6 TO 7 FT. WAVE
DETAIL: E 7 FT AT 10 SECONDS AND E 3 FT AT 5 SECONDS. PATCHY FOG.
A CHANCE OF SHOWERS. VSBY 1 NM OR LESS.
TONIGHT
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. A CHANCE
OF SHOWERS IN THE EVENING. VSBY 1 NM OR LESS.
FRI
NW WINDS 5 TO 10 KT. SEAS AROUND 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 NM OR LESS.
FRI NIGHT
W WINDS AROUND 10 KT. SEAS 4 TO 5 FT. WAVE DETAIL: E
5 FT AT 9 SECONDS AND E 2 FT AT 5 SECONDS.
SAT
W WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS 4 TO
5 FT. WAVE DETAIL: E 5 FT AT 10 SECONDS AND SW 2 FT AT 6 SECONDS.
SAT NIGHT
S WINDS AROUND 10 KT, BECOMING SE AFTER MIDNIGHT.
SEAS AROUND 4 FT. WAVE DETAIL: E 4 FT AT 10 SECONDS AND SW 1 FOOT
AT 6 SECONDS. A CHANCE OF RAIN IN THE EVENING, THEN RAIN LIKELY
AFTER MIDNIGHT.
SUN
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. RAIN LIKELY.
SUN NIGHT THROUGH 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.
ANZ282-010600-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
104 PM EDT THU APR 30 2026
THIS AFTERNOON
S WINDS AROUND 5 KT. SEAS 5 TO 6 FT. WAVE
DETAIL: E 6 FT AT 10 SECONDS AND SE 3 FT AT 4 SECONDS. PATCHY
FOG. A CHANCE OF SHOWERS. VSBY 1 NM OR LESS.
TONIGHT
NW WINDS 5 TO 10 KT. SEAS 5 TO 6 FT. WAVE DETAIL: E
6 FT AT 10 SECONDS AND E 2 FT AT 5 SECONDS. PATCHY FOG. A CHANCE
OF SHOWERS IN THE EVENING. VSBY 1 NM OR LESS.
FRI
W WINDS AROUND 10 KT. SEAS 5 TO 6 FT. WAVE DETAIL: E 5 FT
AT 10 SECONDS AND W 3 FT AT 5 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 TO 3 NM.
FRI NIGHT
W WINDS 10 TO 15 KT. SEAS 4 TO 5 FT. WAVE DETAIL: E
4 FT AT 9 SECONDS AND W 3 FT AT 5 SECONDS.
SAT
SW WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS
4 TO 5 FT. WAVE DETAIL: E 4 FT AT 9 SECONDS AND W 2 FT AT
5 SECONDS.
SAT NIGHT
S WINDS AROUND 10 KT, BECOMING NE AFTER MIDNIGHT.
SEAS AROUND 4 FT. WAVE DETAIL: E 4 FT AT 10 SECONDS AND SW 2 FT
AT 6 SECONDS. RAIN.
SUN
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 4 TO
5 FT. RAIN LIKELY.
SUN NIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
5 TO 7 FT.
MON AND MON NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 4 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.
ANZ283-010600-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
104 PM EDT THU APR 30 2026
THIS AFTERNOON
E WINDS AROUND 5 KT. SEAS 5 TO 6 FT. WAVE
DETAIL: E 6 FT AT 10 SECONDS AND SE 3 FT AT 6 SECONDS. PATCHY
FOG. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
TONIGHT
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 AFTER
MIDNIGHT WITH VSBY 1 NM OR LESS.
FRI
W WINDS 10 TO 15 KT. SEAS 5 TO 6 FT. WAVE DETAIL: E 5 FT
AT 10 SECONDS AND NW 3 FT AT 4 SECONDS.
FRI NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
DIMINISHING TO 5 TO 10 KT AFTER MIDNIGHT. SEAS 4 TO 5 FT. WAVE
DETAIL: E 4 FT AT 9 SECONDS AND W 3 FT AT 5 SECONDS.
SAT
W WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS 3 TO
4 FT. WAVE DETAIL: SW 3 FT AT 6 SECONDS AND E 3 FT AT 9 SECONDS.
A CHANCE OF RAIN IN THE AFTERNOON.
SAT NIGHT
S WINDS AROUND 10 KT, BECOMING NE AFTER MIDNIGHT.
SEAS 3 TO 4 FT. WAVE DETAIL: E 4 FT AT 10 SECONDS AND S 1 FOOT AT
4 SECONDS. RAIN LIKELY.
SUN
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
5 FT. RAIN LIKELY.
SUN NIGHT THROUGH 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.
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