168
FZUS51 KBOX 210804
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
404 AM EDT MON APR 21 2025
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 25 NM
ANZ200-212100-
404 AM EDT MON APR 21 2025
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
HIGH PRES BUILDS OVER THE REGION TODAY, WITH A WARM FRONT MOVING
THROUGH 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.
ANZ250-212100-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
404 AM EDT MON APR 21 2025
TODAY
NW WINDS 5 TO 10 KT, BECOMING SE 10 TO 15 KT WITH GUSTS
UP TO 20 KT THIS AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT
AT 5 SECONDS AND SE 1 FOOT AT 7 SECONDS.
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 2 FT AT 6 SECONDS AND NE 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 SE 1 FOOT AT
10 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: S 3 FT
AT 5 SECONDS AND W 2 FT AT 3 SECONDS.
WED
NW WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 2 FT AT 6 SECONDS AND SE 2 FT AT
9 SECONDS.
WED NIGHT
S WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 8 SECONDS AND NW 1 FOOT AT
3 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.
ANZ251-212100-
MASSACHUSETTS BAY AND IPSWICH BAY-
404 AM EDT MON APR 21 2025
TODAY
N WINDS AROUND 5 KT, BECOMING SE 10 TO 15 KT WITH GUSTS
UP TO 20 KT THIS AFTERNOON. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT
THIS AFTERNOON. WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND SE 1 FOOT
AT 7 SECONDS, BECOMING NW 1 FOOT AT 2 SECONDS AND NE 1 FOOT AT
5 SECONDS.
TONIGHT
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 11 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:
SE 2 FT AT 5 SECONDS AND W 1 FOOT AT 2 SECONDS.
WED
NW WINDS 5 TO 10 KT, BECOMING SE 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 5 SECONDS, BECOMING NW
1 FOOT AT 3 SECONDS AND E 1 FOOT AT 4 SECONDS.
WED NIGHT
S WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: NW 1 FOOT AT 2 SECONDS AND SE 1 FOOT
AT 4 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.
ANZ231-212100-
CAPE COD BAY-
404 AM EDT MON APR 21 2025
TODAY
N WINDS AROUND 5 KT, BECOMING SE THIS AFTERNOON. SEAS
AROUND 2 FT THIS MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: N
2 FT AT 5 SECONDS AND S 1 FOOT AT 7 SECONDS, BECOMING N 1 FOOT AT
5 SECONDS AND S 1 FOOT AT 6 SECONDS.
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 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
NW WINDS 5 TO 10 KT, BECOMING NE IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: NW 1 FOOT AT 3 SECONDS AND S 1 FOOT
AT 6 SECONDS.
WED NIGHT
S WINDS AROUND 5 KT, BECOMING W AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: S 1 FOOT AT 3 SECONDS AND N 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.
ANZ254-212100-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
404 AM EDT MON APR 21 2025
TODAY
N WINDS 5 TO 10 KT, BECOMING SE THIS AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: N 2 FT AT 6 SECONDS AND S 2 FT AT
7 SECONDS.
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 N 2 FT AT
5 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 7 SECONDS AND SE 2 FT AT 8 SECONDS.
THU THROUGH FRI
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 7 SECONDS AND NW 1 FOOT AT 3 SECONDS.
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.
ANZ255-212100-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
404 AM EDT MON APR 21 2025
TODAY
NE WINDS 5 TO 10 KT, BECOMING SE THIS AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND N 1 FOOT AT
4 SECONDS.
TONIGHT
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 5 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 6 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: S 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 7 SECONDS AND SE 1 FOOT AT 9 SECONDS.
THU THROUGH FRI
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 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.
ANZ256-212100-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
404 AM EDT MON APR 21 2025
TODAY
E WINDS 5 TO 10 KT, BECOMING S THIS AFTERNOON. SEAS 2 TO
3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND N 1 FOOT AT 3 SECONDS.
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 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 6 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 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 7 SECONDS AND SE 1 FOOT AT 9 SECONDS.
THU THROUGH FRI
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 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.
ANZ232-212100-
NANTUCKET SOUND-
404 AM EDT MON APR 21 2025
TODAY
N WINDS AROUND 5 KT, BECOMING S THIS AFTERNOON. SEAS
AROUND 2 FT THIS MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: N
1 FOOT AT 3 SECONDS AND S 1 FOOT AT 7 SECONDS, BECOMING N 1 FOOT
AT 4 SECONDS AND S 1 FOOT AT 6 SECONDS.
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 W 1 FOOT
AT 3 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 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 5 TO 10 KT AFTER MIDNIGHT. SEAS 2 TO 3 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 AROUND 2 FT. 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. WAVE
DETAIL: W 1 FOOT AT 2 SECONDS AND S 1 FOOT AT 7 SECONDS.
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.
ANZ233-212100-
VINEYARD SOUND-
404 AM EDT MON APR 21 2025
TODAY
NE WINDS AROUND 5 KT, BECOMING S THIS AFTERNOON. SEAS
AROUND 2 FT THIS 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
3 SECONDS AND S 1 FOOT AT 6 SECONDS.
TONIGHT
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 11 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 5 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 6 SECONDS AND NW 1 FOOT AT 3 SECONDS.
THU THROUGH FRI
S WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: W 1 FOOT AT 4 SECONDS AND S 1 FOOT AT 7 SECONDS.
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.
ANZ234-212100-
BUZZARDS BAY-
404 AM EDT MON APR 21 2025
TODAY
NE WINDS AROUND 5 KT, BECOMING S THIS AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND SW 1 FOOT
AT 7 SECONDS.
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 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. WAVE
DETAIL: NW 1 FOOT AT 2 SECONDS AND SW 1 FOOT AT 5 SECONDS.
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.
ANZ235-212100-
RHODE ISLAND SOUND-
404 AM EDT MON APR 21 2025
TODAY
NE WINDS AROUND 5 KT, BECOMING S THIS AFTERNOON. SEAS
AROUND 2 FT THIS MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: S
2 FT AT 7 SECONDS AND N 1 FOOT AT 4 SECONDS, BECOMING S 1 FOOT AT
6 SECONDS AND SE 1 FOOT AT 12 SECONDS.
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 4 SECONDS AND SE 1 FOOT AT
10 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 SE 1 FOOT AT 9 SECONDS.
THU THROUGH FRI
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 7 SECONDS AND NW 1 FOOT AT 2 SECONDS.
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.
ANZ237-212100-
BLOCK ISLAND SOUND-
404 AM EDT MON APR 21 2025
TODAY
E WINDS AROUND 5 KT, BECOMING S THIS AFTERNOON. SEAS
AROUND 2 FT THIS MORNING, THEN 1 FOOT OR LESS. WAVE DETAIL: S
2 FT AT 7 SECONDS, BECOMING S 1 FOOT AT 6 SECONDS.
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. 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 SE 1 FOOT AT 9 SECONDS.
THU THROUGH FRI
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SE 1 FOOT AT 7 SECONDS.
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.
ANZ230-212100-
BOSTON HARBOR-
404 AM EDT MON APR 21 2025
TODAY
N WINDS AROUND 5 KT, BECOMING SE 10 TO 15 KT THIS
AFTERNOON. WAVES 1 FOOT OR LESS, THEN AROUND 2 FT THIS AFTERNOON.
TONIGHT
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
NW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
WED NIGHT
SE WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
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.
ANZ236-212100-
NARRAGANSETT BAY-
404 AM EDT MON APR 21 2025
TODAY
NE WINDS AROUND 5 KT, BECOMING S THIS AFTERNOON. WAVES
AROUND 2 FT THIS MORNING, THEN 1 FOOT OR LESS.
TONIGHT
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
NW WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. WAVES
AROUND 2 FT.
WED NIGHT
SW WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT.
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.
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