723
FZUS51 KBOX 212004
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
404 PM EDT MON APR 21 2025
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 25 NM
ANZ200-220900-
404 PM EDT MON APR 21 2025
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
WARM FRONT MOVES THROUGH TONIGHT INTO TUE. COLD FRONT MOVES THROUGH
TUE NIGHT WITH ANOTHER HIGH PRES ARRIVING FOR WED. HIGH PRES
MAINTAINS CONTROL THROUGH THU. PERIODIC CHANCES FOR RAINFALL FRI
THROUGH NEXT WEEKEND.
ANZ250-220900-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
404 PM EDT MON APR 21 2025
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND NE 1 FOOT AT
4 SECONDS. SHOWERS AFTER MIDNIGHT.
TUE
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SW 3 FT AT 3 SECONDS AND SE 1 FOOT AT
10 SECONDS. SHOWERS LIKELY IN THE MORNING WITH VSBY 1 NM OR LESS.
TUE NIGHT
W WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT AT 3 SECONDS AND S
2 FT AT 5 SECONDS.
WED
W WINDS 10 TO 15 KT, BECOMING SW 5 TO 10 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: NW 2 FT AT 4 SECONDS AND
SE 2 FT AT 9 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 8 SECONDS AND NW 1 FOOT AT
3 SECONDS.
THU AND THU NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 3 SECONDS AND SE 2 FT AT 9 SECONDS.
FRI
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT.
FRI NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 4 FT. A CHANCE OF SHOWERS.
SAT AND SAT NIGHT
S WINDS 15 TO 20 KT, BECOMING W. GUSTS UP TO
25 KT. SEAS 3 TO 5 FT. SHOWERS LIKELY.
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.
ANZ251-220900-
MASSACHUSETTS BAY AND IPSWICH BAY-
404 PM EDT MON APR 21 2025
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 3 SECONDS AND NE 1 FOOT AT
4 SECONDS. SHOWERS AFTER MIDNIGHT.
TUE
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, DIMINISHING TO
5 TO 10 KT IN THE AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: S
2 FT AT 3 SECONDS AND E 1 FOOT AT 4 SECONDS. A CHANCE OF SHOWERS
IN THE MORNING WITH VSBY 1 NM OR LESS.
TUE NIGHT
W WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL:
NW 2 FT AT 3 SECONDS AND SE 1 FOOT AT 5 SECONDS.
WED
W WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: NW
1 FOOT AT 3 SECONDS AND E 1 FOOT AT 5 SECONDS, BECOMING NW 1 FOOT
AT 3 SECONDS AND NE 1 FOOT AT 4 SECONDS.
WED NIGHT
S WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: NW 1 FOOT AT 2 SECONDS AND NE 1 FOOT
AT 3 SECONDS.
THU AND THU NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SE 2 FT AT 3 SECONDS AND N 1 FOOT AT 3 SECONDS.
FRI
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT.
FRI NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. A CHANCE OF SHOWERS.
SAT AND SAT NIGHT
S WINDS AROUND 15 KT, BECOMING W. GUSTS UP
TO 20 KT. SEAS 2 TO 4 FT. SHOWERS LIKELY.
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.
ANZ231-220900-
CAPE COD BAY-
404 PM EDT MON APR 21 2025
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS 1 FOOT OR LESS, THEN AROUND 2 FT AFTER MIDNIGHT. WAVE
DETAIL: S 1 FOOT AT 3 SECONDS AND N 1 FOOT AT 5 SECONDS. SHOWERS
AFTER MIDNIGHT.
TUE
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. WAVE DETAIL: S 2 FT AT 3 SECONDS AND NE 1 FOOT AT
4 SECONDS. SHOWERS LIKELY IN THE MORNING WITH VSBY 1 TO 3 NM.
TUE NIGHT
W WINDS AROUND 10 KT, BECOMING NW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 1 FOOT AT 4 SECONDS AND SE
1 FOOT AT 10 SECONDS.
WED
NW WINDS 5 TO 10 KT, BECOMING E IN THE AFTERNOON. SEAS
AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: NW
1 FOOT AT 3 SECONDS AND SE 1 FOOT AT 6 SECONDS, BECOMING N 1 FOOT
AT 4 SECONDS AND S 1 FOOT AT 6 SECONDS.
WED NIGHT
S WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND S
1 FOOT AT 3 SECONDS.
THU AND THU NIGHT
S WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS.
WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND S 1 FOOT AT 6 SECONDS.
FRI
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
FRI NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
AROUND 2 FT. A CHANCE OF SHOWERS.
SAT AND SAT NIGHT
S WINDS AROUND 15 KT, BECOMING W. GUSTS UP
TO 20 KT. SEAS 2 TO 3 FT. SHOWERS LIKELY.
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.
ANZ254-220900-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
404 PM EDT MON APR 21 2025
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT AT 5 SECONDS AND S 2 FT AT
7 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
TUE
S WINDS 15 TO 20 KT, BECOMING SW 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S 3 FT
AT 5 SECONDS AND N 1 FOOT AT 5 SECONDS. A CHANCE OF SHOWERS IN
THE MORNING WITH VSBY 1 TO 3 NM.
TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING NW AFTER MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: S 3 FT
AT 6 SECONDS AND NW 2 FT AT 3 SECONDS.
WED
NW WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND NW 2 FT AT
4 SECONDS.
WED NIGHT
SW WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 7 SECONDS AND NW 1 FOOT
AT 4 SECONDS.
THU AND THU NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 6 SECONDS AND SE 2 FT AT 9 SECONDS.
FRI
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
FRI NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 4 FT. A CHANCE OF SHOWERS.
SAT AND SAT NIGHT
S WINDS 15 TO 20 KT, BECOMING W. GUSTS UP TO
25 KT. SEAS 4 TO 6 FT. SHOWERS LIKELY.
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.
ANZ255-220900-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
404 PM EDT MON APR 21 2025
TONIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT AT 5 SECONDS AND NE
1 FOOT AT 5 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
TUE
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS AND NE 1 FOOT AT
5 SECONDS. A CHANCE OF SHOWERS IN THE MORNING.
TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING NW AFTER MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT
AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS.
WED
NW WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. SEAS
2 TO 4 FT. WAVE DETAIL: S 4 FT AT 7 SECONDS AND NW 1 FOOT AT
3 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS.
THU AND THU NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 6 SECONDS AND SE 2 FT AT 10 SECONDS.
FRI
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
FRI NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 4 FT. A CHANCE OF SHOWERS.
SAT AND SAT NIGHT
S WINDS 15 TO 20 KT, BECOMING W. GUSTS UP TO
25 KT. SEAS 4 TO 6 FT. SHOWERS LIKELY. VSBY 1 TO 3 NM.
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.
ANZ256-220900-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
404 PM EDT MON APR 21 2025
TONIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS AND SE
1 FOOT AT 10 SECONDS. SHOWERS AFTER MIDNIGHT.
TUE
SW WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT
AT 6 SECONDS AND SE 1 FOOT AT 9 SECONDS. A CHANCE OF SHOWERS IN
THE MORNING WITH VSBY 1 NM OR LESS.
TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING NW AFTER MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT
AT 7 SECONDS AND NW 1 FOOT AT 2 SECONDS.
WED
NW WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND NW 1 FOOT AT
3 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS.
THU AND THU NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 6 SECONDS AND SE 2 FT AT 9 SECONDS.
FRI
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
FRI NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 4 FT. A CHANCE OF SHOWERS.
SAT AND SAT NIGHT
S WINDS 15 TO 20 KT, BECOMING W. GUSTS UP TO
25 KT. SEAS 4 TO 6 FT. SHOWERS LIKELY.
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.
ANZ232-220900-
NANTUCKET SOUND-
404 PM EDT MON APR 21 2025
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 3 SECONDS AND NE 1 FOOT AT
5 SECONDS. SHOWERS AFTER MIDNIGHT.
TUE
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND N 1 FOOT AT 4 SECONDS.
SHOWERS LIKELY IN THE MORNING WITH VSBY 1 TO 3 NM.
TUE NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NW AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT AT
6 SECONDS AND W 1 FOOT AT 3 SECONDS.
WED
NW WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: NW
1 FOOT AT 3 SECONDS AND S 1 FOOT AT 7 SECONDS, BECOMING W 1 FOOT
AT 2 SECONDS AND S 1 FOOT AT 6 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 1 FOOT OR LESS. WAVE DETAIL: W 1 FOOT AT 2 SECONDS AND S
1 FOOT AT 6 SECONDS.
THU AND THU NIGHT
S WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS.
WAVE DETAIL: N 1 FOOT AT 2 SECONDS AND S 1 FOOT AT 5 SECONDS.
FRI
S WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS.
FRI NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. A CHANCE OF SHOWERS.
SAT AND SAT NIGHT
S WINDS 15 TO 20 KT, BECOMING W 10 TO 15 KT.
GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. SHOWERS LIKELY. VSBY 1 TO
3 NM.
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.
ANZ233-220900-
VINEYARD SOUND-
404 PM EDT MON APR 21 2025
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND SE 1 FOOT AT
10 SECONDS. SHOWERS AFTER MIDNIGHT.
TUE
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 3 FT AT 5 SECONDS AND SE 1 FOOT AT
9 SECONDS. SHOWERS LIKELY IN THE MORNING WITH VSBY 1 TO 3 NM.
TUE NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NW 5 TO 10 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW
3 FT AT 6 SECONDS AND W 1 FOOT AT 3 SECONDS.
WED
NW WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: SW
2 FT AT 6 SECONDS AND NW 1 FOOT AT 3 SECONDS, BECOMING W 1 FOOT
AT 3 SECONDS AND SW 1 FOOT AT 6 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 1 FOOT OR LESS. WAVE DETAIL: W 1 FOOT AT 2 SECONDS AND SW
1 FOOT AT 5 SECONDS.
THU AND THU NIGHT
S WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS.
WAVE DETAIL: N 1 FOOT AT 2 SECONDS AND S 1 FOOT AT 7 SECONDS.
FRI
S WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS.
FRI NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. A CHANCE OF SHOWERS.
SAT AND SAT NIGHT
S WINDS 15 TO 20 KT, BECOMING W 10 TO 15 KT.
GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. SHOWERS LIKELY.
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.
ANZ234-220900-
BUZZARDS BAY-
404 PM EDT MON APR 21 2025
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT AT 3 SECONDS AND NE 1 FOOT
AT 5 SECONDS. SHOWERS AFTER MIDNIGHT.
TUE
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND SE 1 FOOT AT
9 SECONDS. SHOWERS LIKELY IN THE MORNING WITH VSBY 1 TO 3 NM.
TUE NIGHT
W WINDS 10 TO 15 KT, BECOMING NW 5 TO 10 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 6 SECONDS AND
W 1 FOOT AT 3 SECONDS.
WED
NW WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: NW 1 FOOT AT 3 SECONDS AND SW 1 FOOT
AT 6 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 1 FOOT OR LESS. WAVE DETAIL: SW 1 FOOT AT 4 SECONDS AND SE
1 FOOT AT 8 SECONDS.
THU AND THU NIGHT
S WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS.
WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND S 1 FOOT AT 5 SECONDS.
FRI
S WINDS 10 TO 15 KT. SEAS 1 FOOT OR LESS.
FRI NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. A CHANCE OF SHOWERS.
SAT AND SAT NIGHT
S WINDS 15 TO 20 KT, BECOMING W 10 TO 15 KT.
GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. SHOWERS LIKELY.
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.
ANZ235-220900-
RHODE ISLAND SOUND-
404 PM EDT MON APR 21 2025
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 5 SECONDS AND SE 1 FOOT AT
10 SECONDS. SHOWERS AFTER MIDNIGHT.
TUE
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS AND SE 1 FOOT AT
9 SECONDS. SHOWERS LIKELY IN THE MORNING WITH VSBY 1 NM OR LESS.
TUE NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NW 5 TO 10 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT
AT 7 SECONDS AND SE 1 FOOT AT 9 SECONDS.
WED
NW WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND NW 1 FOOT AT
3 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS.
THU AND THU NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SE 2 FT AT 7 SECONDS AND N 1 FOOT AT 2 SECONDS.
FRI
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
FRI NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 4 FT. A CHANCE OF SHOWERS.
SAT AND SAT NIGHT
S WINDS 15 TO 20 KT, BECOMING W. GUSTS UP TO
25 KT. SEAS 3 TO 5 FT. SHOWERS LIKELY.
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.
ANZ237-220900-
BLOCK ISLAND SOUND-
404 PM EDT MON APR 21 2025
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND SE 1 FOOT AT
10 SECONDS. SHOWERS AFTER MIDNIGHT.
TUE
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 3 FT AT 6 SECONDS AND SE 1 FOOT AT
9 SECONDS. A CHANCE OF SHOWERS IN THE MORNING WITH VSBY 1 NM OR
LESS.
TUE NIGHT
W WINDS 10 TO 15 KT, BECOMING NW 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND W
1 FOOT AT 3 SECONDS.
WED
NW WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS AND NW 1 FOOT AT
3 SECONDS.
WED NIGHT
SW WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 7 SECONDS AND W 1 FOOT
AT 3 SECONDS.
THU AND THU NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SE 1 FOOT AT 7 SECONDS.
FRI
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
FRI NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 4 FT. A CHANCE OF SHOWERS.
SAT AND SAT NIGHT
S WINDS 10 TO 15 KT, BECOMING W. GUSTS UP TO
20 KT. SEAS 3 TO 5 FT. SHOWERS LIKELY.
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.
ANZ230-220900-
BOSTON HARBOR-
404 PM EDT MON APR 21 2025
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT THIS EVENING.
WAVES AROUND 2 FT. SHOWERS AFTER MIDNIGHT.
TUE
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS IN THE MORNING WITH VSBY 1 TO 3 NM.
TUE NIGHT
W WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT AFTER
MIDNIGHT. WAVES AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR LESS.
WED
W WINDS 5 TO 10 KT. WAVES AROUND 2 FT IN THE MORNING, THEN
1 FOOT OR LESS.
WED NIGHT
NE WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS.
THU AND THU NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
FRI
S WINDS 10 TO 15 KT. WAVES AROUND 2 FT.
FRI NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES
AROUND 2 FT. A CHANCE OF SHOWERS.
SAT AND SAT NIGHT
S WINDS AROUND 15 KT, BECOMING W. GUSTS UP
TO 20 KT. WAVES AROUND 2 FT. SHOWERS LIKELY.
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.
ANZ236-220900-
NARRAGANSETT BAY-
404 PM EDT MON APR 21 2025
TONIGHT
S WINDS 10 TO 15 KT. WAVES 2 TO 3 FT. SHOWERS AFTER
MIDNIGHT.
TUE
SW WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT. WAVES 2 TO
3 FT.
TUE NIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
WAVES 2 TO 3 FT.
WED
W WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
WED NIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
WAVES AROUND 2 FT.
THU AND THU NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
FRI
S WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
FRI NIGHT
S WINDS 10 TO 15 KT. WAVES 2 TO 3 FT. A CHANCE OF
SHOWERS.
SAT AND SAT NIGHT
S WINDS 10 TO 15 KT, BECOMING W. GUSTS UP TO
20 KT. WAVES 2 TO 4 FT. SHOWERS LIKELY.
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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