342
FZUS51 KBOX 210505
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
104 AM EDT MON APR 21 2025
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 25 NM
ANZ200-211800-
104 AM EDT MON APR 21 2025
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
ANOTHER HIGH PRES BUILDS OVER THE REGION FOR MON, WITH ANOTHER FRONT
PASSING OVER THE WATERS TUE. ANOTHER HIGH PRES SHOULD ARRIVE FOR
WED. HIGH PRES MAINTAINS CONTROL THROUGH THU. PERIODIC CHANCES FOR
RAINFALL FRIDAY THROUGH NEXT WEEKEND.
ANZ250-211800-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
104 AM EDT MON APR 21 2025
REST OF TONIGHT
NW WINDS 10 TO 15 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: N 3 FT AT 5 SECONDS AND SE 1 FOOT AT 7 SECONDS.
MON
NW WINDS 5 TO 10 KT, BECOMING SE 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT AT
5 SECONDS AND SE 1 FOOT AT 7 SECONDS.
MON NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: S 2 FT AT 3 SECONDS AND N 1 FOOT AT
4 SECONDS. SHOWERS LIKELY AFTER MIDNIGHT.
TUE
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND E 1 FOOT AT 4 SECONDS.
PATCHY FOG. A CHANCE OF SHOWERS IN THE MORNING. VSBY 1 NM OR
LESS, INCREASING TO 1 TO 3 NM IN THE AFTERNOON.
TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING NW AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT
AT 4 SECONDS AND SE 2 FT AT 9 SECONDS.
WED AND WED NIGHT
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: NW 2 FT AT 3 SECONDS AND S 2 FT AT 5 SECONDS.
THU THROUGH 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.
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.
ANZ251-211800-
MASSACHUSETTS BAY AND IPSWICH BAY-
104 AM EDT MON APR 21 2025
REST OF TONIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: N 2 FT AT 5 SECONDS AND SW 1 FOOT AT 5 SECONDS.
MON
N WINDS AROUND 5 KT, BECOMING SE 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT
IN THE AFTERNOON. WAVE DETAIL: NW 1 FOOT AT 3 SECONDS AND N
1 FOOT AT 5 SECONDS, BECOMING NW 1 FOOT AT 2 SECONDS AND SE
1 FOOT AT 4 SECONDS.
MON NIGHT
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
5 SECONDS. SHOWERS LIKELY AFTER MIDNIGHT.
TUE
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE MORNING.
SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 5 SECONDS AND SE 1 FOOT
AT 10 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE MORNING
WITH VSBY 1 NM OR LESS.
TUE NIGHT
W WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 2 FT AT 4 SECONDS AND E 1 FOOT AT 5 SECONDS.
WED AND WED NIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: NW 1 FOOT AT 3 SECONDS AND SE 1 FOOT AT 5 SECONDS.
THU THROUGH FRI
S WINDS 10 TO 15 KT. SEAS AROUND 2 FT.
FRI NIGHT
S WINDS 10 TO 15 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.
ANZ231-211800-
CAPE COD BAY-
104 AM EDT MON APR 21 2025
REST OF TONIGHT
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: NW 2 FT AT 5 SECONDS AND N 1 FOOT AT 5 SECONDS.
MON
N WINDS AROUND 5 KT, BECOMING SE IN THE AFTERNOON. SEAS
AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: N
2 FT AT 5 SECONDS AND N 1 FOOT AT 5 SECONDS, BECOMING N 1 FOOT AT
4 SECONDS AND N 1 FOOT AT 5 SECONDS.
MON NIGHT
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 2 SECONDS AND N 1 FOOT AT 5 SECONDS,
BECOMING S 1 FOOT AT 3 SECONDS AND N 1 FOOT AT 5 SECONDS. SHOWERS
LIKELY 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 N 1 FOOT AT 5 SECONDS.
PATCHY FOG. SHOWERS LIKELY IN THE MORNING. VSBY 1 NM OR LESS,
INCREASING TO 1 TO 3 NM IN THE AFTERNOON.
TUE NIGHT
SW WINDS 10 TO 15 KT, BECOMING NW 5 TO 10 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: SW 1 FOOT AT 4 SECONDS
AND E 1 FOOT AT 5 SECONDS. PATCHY FOG IN THE EVENING.
WED AND WED NIGHT
W WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS.
WAVE DETAIL: NW 1 FOOT AT 3 SECONDS AND S 1 FOOT AT 6 SECONDS.
THU THROUGH 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.
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.
ANZ254-211800-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
104 AM EDT MON APR 21 2025
REST OF TONIGHT
NW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. WAVE
DETAIL: NW 3 FT AT 6 SECONDS AND S 2 FT AT 8 SECONDS.
MON
N WINDS 5 TO 10 KT, BECOMING SE IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: NW 2 FT AT 6 SECONDS AND N 2 FT AT
6 SECONDS.
MON NIGHT
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 N
2 FT AT 6 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
TUE
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS AND N 1 FOOT AT 5 SECONDS.
PATCHY FOG. A CHANCE OF SHOWERS IN THE MORNING. VSBY 1 TO 3 NM.
TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING NW 5 TO 10 KT AFTER MIDNIGHT. SEAS 3 TO 4 FT. WAVE
DETAIL: SW 4 FT AT 5 SECONDS AND SE 1 FOOT AT 9 SECONDS. PATCHY
FOG IN THE EVENING.
WED AND WED NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 3 FT AT 6 SECONDS AND SE 2 FT AT 9 SECONDS.
THU THROUGH 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.
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.
ANZ255-211800-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
104 AM EDT MON APR 21 2025
REST OF TONIGHT
N WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: S 3 FT AT 8 SECONDS AND N 1 FOOT AT 4 SECONDS.
MON
NE WINDS 5 TO 10 KT, BECOMING SE IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND NW 1 FOOT AT
3 SECONDS.
MON NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND NE
1 FOOT AT 5 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
TUE
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
4 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS AND NE 1 FOOT AT
5 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE MORNING. VSBY
1 TO 3 NM.
TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING NW 5 TO 10 KT AFTER MIDNIGHT. SEAS 3 TO 4 FT. WAVE
DETAIL: SW 4 FT AT 6 SECONDS AND W 1 FOOT AT 3 SECONDS. PATCHY
FOG IN THE EVENING.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: S 3 FT AT 6 SECONDS AND SE 1 FOOT AT 9 SECONDS.
THU THROUGH 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.
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.
ANZ256-211800-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
104 AM EDT MON APR 21 2025
REST OF TONIGHT
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 3 FT AT 7 SECONDS AND N 1 FOOT AT 3 SECONDS.
MON
E WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS 2 TO
3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND N 1 FOOT AT 3 SECONDS.
MON NIGHT
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 4 SECONDS AND SE
1 FOOT AT 9 SECONDS. SHOWERS LIKELY 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 4 FT
AT 5 SECONDS AND SE 1 FOOT AT 9 SECONDS. PATCHY FOG. A CHANCE OF
SHOWERS IN THE MORNING. VSBY 1 NM OR LESS, INCREASING TO 1 TO
3 NM IN THE AFTERNOON.
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 6 SECONDS AND NW 1 FOOT AT 3 SECONDS. PATCHY FOG IN THE
EVENING.
WED AND WED NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 3 FT AT 6 SECONDS AND SE 1 FOOT AT 9 SECONDS.
THU THROUGH 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
3 TO 5 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.
ANZ232-211800-
NANTUCKET SOUND-
104 AM EDT MON APR 21 2025
REST OF TONIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 8 SECONDS AND NW 1 FOOT AT 3 SECONDS.
MON
N WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: NW
1 FOOT AT 3 SECONDS AND N 1 FOOT AT 4 SECONDS, BECOMING NW 1 FOOT
AT 3 SECONDS AND NE 1 FOOT AT 4 SECONDS.
MON NIGHT
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
N 1 FOOT AT 5 SECONDS. SHOWERS LIKELY AFTER MIDNIGHT.
TUE
S WINDS AROUND 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND N 1 FOOT AT 5 SECONDS.
PATCHY FOG. A CHANCE OF SHOWERS IN THE MORNING. VSBY 1 NM OR
LESS, INCREASING TO 1 TO 3 NM IN THE AFTERNOON.
TUE NIGHT
SW 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 2 FT AT 5 SECONDS AND SE 1 FOOT AT 9 SECONDS. PATCHY
FOG IN THE EVENING.
WED AND WED NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: NW 1 FOOT AT 2 SECONDS AND S 1 FOOT AT 6 SECONDS.
THU THROUGH 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.
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.
ANZ233-211800-
VINEYARD SOUND-
104 AM EDT MON APR 21 2025
REST OF TONIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SW 2 FT AT 7 SECONDS AND N 1 FOOT AT 4 SECONDS.
MON
NE WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: SW
2 FT AT 7 SECONDS AND N 1 FOOT AT 4 SECONDS, BECOMING N 1 FOOT AT
4 SECONDS AND S 1 FOOT AT 6 SECONDS.
MON NIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND
SE 1 FOOT AT 9 SECONDS. SHOWERS LIKELY AFTER MIDNIGHT.
TUE
SW WINDS AROUND 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND SE 1 FOOT AT
9 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE MORNING. VSBY
1 TO 3 NM.
TUE NIGHT
SW 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. PATCHY
FOG IN THE EVENING.
WED AND WED NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 7 SECONDS AND NW 1 FOOT AT 3 SECONDS.
THU THROUGH 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.
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.
ANZ234-211800-
BUZZARDS BAY-
104 AM EDT MON APR 21 2025
REST OF TONIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SW 2 FT AT 7 SECONDS AND N 1 FOOT AT 4 SECONDS.
MON
NE WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND SW 1 FOOT
AT 7 SECONDS.
MON NIGHT
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 NE 1 FOOT AT 5 SECONDS,
BECOMING S 2 FT AT 3 SECONDS AND NE 1 FOOT AT 5 SECONDS. SHOWERS
LIKELY AFTER MIDNIGHT.
TUE
SW WINDS AROUND 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND NE 1 FOOT AT
5 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE MORNING. VSBY
1 TO 3 NM.
TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 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. PATCHY
FOG IN THE EVENING.
WED AND WED NIGHT
W WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS.
WAVE DETAIL: NW 1 FOOT AT 3 SECONDS AND SW 1 FOOT AT 6 SECONDS.
THU THROUGH 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.
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.
ANZ235-211800-
RHODE ISLAND SOUND-
104 AM EDT MON APR 21 2025
REST OF TONIGHT
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 3 FT AT 7 SECONDS AND NW 1 FOOT AT 4 SECONDS.
MON
NE WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: S
2 FT AT 8 SECONDS AND N 1 FOOT AT 4 SECONDS, BECOMING S 1 FOOT AT
6 SECONDS AND SE 1 FOOT AT 9 SECONDS.
MON NIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND SE
1 FOOT AT 9 SECONDS. SHOWERS LIKELY AFTER MIDNIGHT.
TUE
SW WINDS AROUND 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS AND SE 1 FOOT AT
9 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE MORNING. VSBY
1 NM OR LESS, INCREASING TO 1 TO 3 NM IN THE AFTERNOON.
TUE NIGHT
SW 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 6 SECONDS AND W 1 FOOT AT 3 SECONDS. PATCHY FOG
IN THE EVENING.
WED AND WED NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 3 FT AT 7 SECONDS AND NW 1 FOOT AT 3 SECONDS.
THU THROUGH 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.
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.
ANZ237-211800-
BLOCK ISLAND SOUND-
104 AM EDT MON APR 21 2025
REST OF TONIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 7 SECONDS AND NW 1 FOOT AT 3 SECONDS.
MON
E WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: S
2 FT AT 7 SECONDS, BECOMING S 1 FOOT AT 6 SECONDS.
MON NIGHT
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 9 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN
SHOWERS LIKELY AFTER MIDNIGHT. PATCHY FOG AFTER MIDNIGHT.
TUE
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE MORNING.
SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 5 SECONDS AND SE 1 FOOT AT
9 SECONDS. PATCHY FOG IN THE MORNING. A CHANCE OF SHOWERS IN THE
MORNING WITH VSBY 1 NM OR LESS.
TUE NIGHT
SW WINDS 10 TO 15 KT, BECOMING NW 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 6 SECONDS AND W
1 FOOT AT 3 SECONDS. PATCHY FOG IN THE EVENING.
WED AND WED NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS.
THU THROUGH 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. 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.
ANZ230-211800-
BOSTON HARBOR-
104 AM EDT MON APR 21 2025
REST OF TONIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
MON
N WINDS AROUND 5 KT, BECOMING SE 10 TO 15 KT IN THE
AFTERNOON. WAVES 1 FOOT OR LESS, THEN AROUND 2 FT IN THE
AFTERNOON.
MON NIGHT
S WINDS 10 TO 15 KT. WAVES AROUND 2 FT IN THE
EVENING, THEN 1 FOOT OR LESS. SHOWERS LIKELY AFTER MIDNIGHT.
TUE
SW WINDS AROUND 10 KT. WAVES 1 FOOT OR LESS, THEN AROUND
2 FT IN THE AFTERNOON. PATCHY FOG IN THE MORNING. A CHANCE OF
SHOWERS IN THE MORNING WITH VSBY 1 TO 3 NM.
TUE NIGHT
W WINDS AROUND 10 KT. WAVES 1 FOOT OR LESS.
WED AND WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
THU THROUGH FRI
S WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
FRI NIGHT
S WINDS 10 TO 15 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.
ANZ236-211800-
NARRAGANSETT BAY-
104 AM EDT MON APR 21 2025
REST OF TONIGHT
N WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
MON
NE WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. WAVES
AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS.
MON NIGHT
S WINDS 10 TO 15 KT. WAVES 2 TO 3 FT. SHOWERS LIKELY
AFTER MIDNIGHT.
TUE
SW WINDS 10 TO 15 KT. WAVES 2 TO 3 FT. PATCHY FOG IN THE
MORNING. A CHANCE OF SHOWERS IN THE MORNING WITH VSBY 1 NM OR
LESS.
TUE NIGHT
W WINDS AROUND 10 KT, BECOMING NW AFTER MIDNIGHT.
WAVES 2 TO 3 FT.
WED AND WED NIGHT
W WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
THU THROUGH FRI
S WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
FRI NIGHT
S WINDS AROUND 10 KT. WAVES 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.
FOR THE LATEST UPDATES...PLEASE VISIT OUR WEBPAGE AT
WWW.WEATHER.GOV/BOSTON
YOU CAN FOLLOW US ON FACEBOOK AT
WWW.FACEBOOK.COM/NWSBOSTON
YOU CAN FOLLOW US ON TWITTER AT
@NWSBOSTON
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page