575
FZUS51 KBOX 210504
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
104 AM EDT SAT MAR 21 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 25 NM
ANZ200-211800-
104 AM EDT SAT MAR 21 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
COLD FRONT ARRIVES THIS EVENING AND BRINGS A PERIOD OF SCA
CONDITIONS TO THE WATERS. A SERIES OF WEAK LOW PRES SYSTEMS WILL
MOVE THROUGH NEW ENGLAND OVER THE WEEKEND, FOLLOWED BY HIGH PRES
EARLY NEXT WEEK.
ANZ250-211800-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
104 AM EDT SAT MAR 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
REST OF TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
SEAS 4 TO 6 FT. WAVE DETAIL: SW 4 FT AT 5 SECONDS AND SE 4 FT AT
9 SECONDS. SHOWERS.
SAT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. WAVE DETAIL: SE 4 FT AT 8 SECONDS AND W 3 FT AT 4 SECONDS.
SAT NIGHT
N WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT,
BECOMING NE AFTER MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: SE 3 FT
AT 8 SECONDS AND NW 2 FT AT 4 SECONDS.
SUN
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND
SE 3 FT AT 7 SECONDS. A CHANCE OF RAIN AND SNOW IN THE MORNING,
THEN RAIN LIKELY IN THE AFTERNOON.
SUN NIGHT
SW WINDS 10 TO 15 KT, BECOMING N 15 TO 20 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 2 TO 3 FT, BUILDING TO 3 TO
5 FT AFTER MIDNIGHT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND SE
3 FT AT 8 SECONDS, BECOMING NE 5 FT AT 8 SECONDS AND NW 2 FT AT
3 SECONDS. RAIN LIKELY.
MON
N WINDS AROUND 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO
8 FT. WAVE DETAIL: NE 7 FT AT 7 SECONDS. A CHANCE OF RAIN.
MON NIGHT
N WINDS 20 TO 25 KT. SEAS 6 TO 8 FT.
TUE
NW WINDS 20 TO 25 KT. SEAS 5 TO 7 FT.
TUE NIGHT
SW WINDS 20 TO 25 KT. SEAS 4 TO 5 FT.
WED AND WED NIGHT
SW WINDS 20 TO 25 KT, BECOMING NW. SEAS 3 TO
5 FT. A CHANCE OF RAIN.
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 SAT MAR 21 2026
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT EARLY THIS
MORNING...
REST OF TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND E 3 FT AT
9 SECONDS. A CHANCE OF SHOWERS.
SAT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
3 FT. WAVE DETAIL: E 3 FT AT 9 SECONDS AND W 2 FT AT 4 SECONDS.
SAT NIGHT
N WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: E 3 FT AT 8 SECONDS AND NW 2 FT AT
3 SECONDS.
SUN
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SE 3 FT AT 4 SECONDS AND E 2 FT AT 7 SECONDS.
A CHANCE OF RAIN AND SNOW IN THE MORNING, THEN RAIN LIKELY IN THE
AFTERNOON.
SUN NIGHT
W WINDS 10 TO 15 KT, BECOMING N 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: NE 4 FT AT 7 SECONDS AND S
2 FT AT 4 SECONDS. RAIN LIKELY.
MON
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT. WAVE DETAIL: NE 6 FT AT 7 SECONDS. A CHANCE OF RAIN.
MON NIGHT
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
4 TO 6 FT.
TUE AND TUE NIGHT
NW WINDS 15 TO 20 KT, BECOMING SW. GUSTS UP
TO 25 KT. SEAS 3 TO 5 FT.
WED AND WED NIGHT
SW WINDS 15 TO 20 KT, BECOMING W 20 TO
25 KT. SEAS 2 TO 4 FT. A CHANCE OF RAIN.
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 SAT MAR 21 2026
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT EARLY THIS
MORNING...
REST OF TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND SE 2 FT AT
9 SECONDS. SHOWERS.
SAT
W WINDS 10 TO 15 KT, BECOMING N IN THE AFTERNOON. GUSTS UP
TO 25 KT. SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT AT 3 SECONDS AND SE
2 FT AT 9 SECONDS.
SAT NIGHT
N WINDS 5 TO 10 KT, BECOMING E AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: NW 1 FOOT AT 4 SECONDS AND E 1 FOOT AT
8 SECONDS.
SUN
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 NE 1 FOOT AT
6 SECONDS. RAIN LIKELY IN THE AFTERNOON.
SUN NIGHT AND MON
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: N 4 FT AT 4 SECONDS. RAIN LIKELY .
MON NIGHT
N WINDS 15 TO 20 KT. SEAS 3 TO 5 FT. WAVE DETAIL: N
4 FT AT 7 SECONDS AND N 3 FT AT 4 SECONDS.
TUE
N WINDS 15 TO 20 KT. SEAS 3 TO 5 FT.
TUE NIGHT
SW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT.
WED AND WED NIGHT
SW WINDS 15 TO 20 KT, BECOMING W 20 TO
25 KT. SEAS 2 TO 3 FT. A CHANCE OF RAIN.
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 SAT MAR 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
REST OF TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
SEAS 4 TO 6 FT. WAVE DETAIL: S 6 FT AT 6 SECONDS AND E 3 FT AT
9 SECONDS. SHOWERS.
SAT
W WINDS 10 TO 15 KT, BECOMING N 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 4 TO 6 FT. WAVE DETAIL: SW
5 FT AT 6 SECONDS AND SE 4 FT AT 8 SECONDS.
SAT NIGHT
N WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT, BECOMING
E AFTER MIDNIGHT. SEAS 3 TO 5 FT. WAVE DETAIL: NW 3 FT AT
6 SECONDS AND SE 3 FT AT 8 SECONDS.
SUN
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: SE 3 FT AT 6 SECONDS. A CHANCE OF RAIN IN THE
AFTERNOON.
SUN NIGHT
SW WINDS 10 TO 15 KT, BECOMING NW AFTER MIDNIGHT.
GUSTS UP TO 20 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SE 4 FT AT
9 SECONDS AND S 3 FT AT 5 SECONDS. RAIN LIKELY.
MON
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT, BUILDING TO 5 TO 8 FT IN THE AFTERNOON. WAVE DETAIL: NE
6 FT AT 8 SECONDS AND W 3 FT AT 6 SECONDS, BECOMING N 7 FT AT
6 SECONDS. RAIN LIKELY, MAINLY IN THE MORNING.
MON NIGHT
N WINDS 20 TO 25 KT. SEAS 6 TO 9 FT.
TUE
NW WINDS 20 TO 25 KT. SEAS 5 TO 7 FT.
TUE NIGHT
SW WINDS 15 TO 20 KT. SEAS 4 TO 6 FT.
WED AND WED NIGHT
SW WINDS 15 TO 20 KT, BECOMING W 20 TO
25 KT. SEAS 3 TO 5 FT. A CHANCE OF RAIN.
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 SAT MAR 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
REST OF TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
SEAS 5 TO 7 FT. WAVE DETAIL: S 7 FT AT 7 SECONDS AND E 3 FT AT
9 SECONDS. SHOWERS.
SAT
W WINDS 10 TO 15 KT, BECOMING N IN THE AFTERNOON. GUSTS UP
TO 25 KT. SEAS 5 TO 7 FT. WAVE DETAIL: SW 7 FT AT 8 SECONDS AND E
3 FT AT 9 SECONDS.
SAT NIGHT
NE WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT, BECOMING
SE AFTER MIDNIGHT. SEAS 3 TO 5 FT. WAVE DETAIL: SW 4 FT AT
7 SECONDS AND SE 3 FT AT 8 SECONDS.
SUN
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. SEAS 2 TO 4 FT. WAVE DETAIL: S 4 FT AT 7 SECONDS.
SUN NIGHT
SW WINDS AROUND 15 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 3 TO 5 FT. WAVE DETAIL: SW 5 FT AT 7 SECONDS AND SE 3 FT AT
9 SECONDS. A CHANCE OF RAIN IN THE EVENING, THEN RAIN LIKELY
AFTER MIDNIGHT.
MON
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT. WAVE DETAIL: NE 6 FT AT 8 SECONDS AND NW 5 FT AT 6 SECONDS.
RAIN LIKELY, MAINLY IN THE MORNING.
MON NIGHT
N WINDS 20 TO 25 KT. SEAS 5 TO 7 FT.
TUE
NW WINDS 20 TO 25 KT. SEAS 4 TO 6 FT.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT.
WED AND WED NIGHT
SW WINDS 20 TO 25 KT, BECOMING NW. SEAS 3 TO
4 FT. A CHANCE OF RAIN.
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 SAT MAR 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
REST OF TONIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 6 TO 7 FT. WAVE DETAIL: S 7 FT AT 7 SECONDS AND E 2 FT AT
9 SECONDS. SHOWERS.
SAT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 5 TO
7 FT. WAVE DETAIL: SW 7 FT AT 8 SECONDS AND E 3 FT AT 9 SECONDS.
SAT NIGHT
NE WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT.
SEAS 3 TO 5 FT. WAVE DETAIL: SW 4 FT AT 7 SECONDS AND SE 3 FT AT
8 SECONDS.
SUN
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. SEAS 3 TO 4 FT. WAVE DETAIL: SE 4 FT AT 7 SECONDS.
PATCHY FOG IN THE MORNING WITH VSBY 1 NM OR LESS.
SUN NIGHT
SW WINDS 10 TO 15 KT, BECOMING NW 15 TO 20 KT AFTER
MIDNIGHT. SEAS 3 TO 5 FT. WAVE DETAIL: SW 5 FT AT 7 SECONDS AND
SE 5 FT AT 8 SECONDS. A CHANCE OF RAIN IN THE EVENING, THEN RAIN
LIKELY AFTER MIDNIGHT.
MON
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT. WAVE DETAIL: NE 6 FT AT 7 SECONDS AND W 3 FT AT 4 SECONDS.
A CHANCE OF RAIN.
MON NIGHT
N WINDS 20 TO 25 KT. SEAS 4 TO 6 FT.
TUE
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 3 FT.
WED
SW WINDS 20 TO 25 KT. SEAS 3 TO 4 FT. A CHANCE OF RAIN.
WED NIGHT
NW WINDS 20 TO 25 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.
ANZ232-211800-
NANTUCKET SOUND-
104 AM EDT SAT MAR 21 2026
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT EARLY THIS
MORNING...
REST OF TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: SW 4 FT AT 5 SECONDS AND E 1 FOOT AT
9 SECONDS. SHOWERS.
SAT
W WINDS 10 TO 15 KT, BECOMING N IN THE AFTERNOON. GUSTS UP
TO 25 KT. SEAS 2 TO 4 FT. WAVE DETAIL: W 3 FT AT 5 SECONDS AND E
2 FT AT 9 SECONDS.
SAT NIGHT
NE WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT AT 6 SECONDS AND E 1 FOOT AT
8 SECONDS.
SUN
S WINDS 10 TO 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
8 SECONDS. A CHANCE OF RAIN IN THE AFTERNOON.
SUN NIGHT AND MON
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND NE 3 FT AT
6 SECONDS. RAIN LIKELY .
MON NIGHT
N WINDS 15 TO 20 KT. SEAS 2 TO 4 FT. WAVE DETAIL: N
3 FT AT 5 SECONDS.
TUE AND TUE NIGHT
NW WINDS 15 TO 20 KT, BECOMING SW. SEAS 2 TO
4 FT.
WED AND WED NIGHT
SW WINDS 15 TO 20 KT, BECOMING W. GUSTS UP
TO 25 KT. SEAS 2 TO 3 FT. A CHANCE OF RAIN.
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 SAT MAR 21 2026
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT EARLY THIS
MORNING...
REST OF TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
SEAS 3 TO 5 FT. WAVE DETAIL: SW 5 FT AT 7 SECONDS AND SE 2 FT AT
9 SECONDS. SHOWERS.
SAT
W WINDS 10 TO 15 KT, BECOMING N IN THE AFTERNOON. GUSTS UP
TO 20 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SW 4 FT AT 7 SECONDS AND
SE 2 FT AT 8 SECONDS.
SAT NIGHT
NE WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 7 SECONDS AND SE 1 FOOT
AT 8 SECONDS.
SUN
S 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
8 SECONDS. A CHANCE OF RAIN IN THE AFTERNOON.
SUN NIGHT AND MON
N WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SW 3 FT AT 5 SECONDS AND SE 2 FT AT 8 SECONDS. RAIN
LIKELY .
MON NIGHT
N WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NW
2 FT AT 5 SECONDS AND NE 2 FT AT 5 SECONDS.
TUE AND TUE NIGHT
NW WINDS 15 TO 20 KT, BECOMING SW. SEAS 2 TO
3 FT.
WED
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
4 FT. A CHANCE OF RAIN.
WED NIGHT
NW WINDS 20 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.
ANZ234-211800-
BUZZARDS BAY-
104 AM EDT SAT MAR 21 2026
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT EARLY THIS
MORNING...
REST OF TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: SW 4 FT AT 6 SECONDS AND SE 2 FT AT
9 SECONDS. SHOWERS.
SAT
W WINDS 5 TO 10 KT, BECOMING N IN THE AFTERNOON. GUSTS UP
TO 20 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 7 SECONDS AND
SE 2 FT AT 9 SECONDS.
SAT NIGHT
NE WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 7 SECONDS AND E 1 FOOT
AT 8 SECONDS.
SUN
S WINDS 10 TO 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
8 SECONDS. A CHANCE OF RAIN IN THE AFTERNOON.
SUN NIGHT AND MON
N WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: NE 2 FT AT 3 SECONDS AND SW 2 FT AT 5 SECONDS. RAIN
LIKELY .
MON NIGHT
N WINDS AROUND 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: N 2 FT AT 4 SECONDS.
TUE AND TUE NIGHT
NW WINDS 10 TO 15 KT, BECOMING SW 15 TO
20 KT. SEAS 2 TO 3 FT.
WED
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
3 FT. A CHANCE OF RAIN.
WED NIGHT
NW 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.
ANZ235-211800-
RHODE ISLAND SOUND-
104 AM EDT SAT MAR 21 2026
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT EARLY THIS
MORNING...
REST OF TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
SEAS 4 TO 6 FT. WAVE DETAIL: SW 6 FT AT 7 SECONDS AND SE 2 FT AT
9 SECONDS. SHOWERS.
SAT
W WINDS 10 TO 15 KT, BECOMING NW IN THE AFTERNOON. GUSTS
UP TO 20 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SW 5 FT AT 8 SECONDS
AND SE 3 FT AT 8 SECONDS.
SAT NIGHT
NE WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT.
SEAS 2 TO 4 FT. WAVE DETAIL: SW 4 FT AT 7 SECONDS AND SE 3 FT AT
8 SECONDS. PATCHY FOG AFTER MIDNIGHT WITH VSBY 1 TO 3 NM.
SUN
S 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 2 FT AT 8 SECONDS.
PATCHY FOG IN THE MORNING. A CHANCE OF RAIN IN THE AFTERNOON.
VSBY 1 NM OR LESS IN THE MORNING.
SUN NIGHT AND MON
N WINDS 15 TO 20 KT. SEAS 3 TO 5 FT. WAVE
DETAIL: NE 5 FT AT 6 SECONDS AND S 4 FT AT 6 SECONDS. RAIN LIKELY
.
MON NIGHT
N WINDS 15 TO 20 KT. SEAS 2 TO 4 FT. WAVE DETAIL: E
4 FT AT 7 SECONDS AND NW 3 FT AT 3 SECONDS.
TUE AND TUE NIGHT
NW WINDS 15 TO 20 KT, BECOMING SW. GUSTS UP
TO 25 KT. SEAS 2 TO 3 FT.
WED
SW WINDS 20 TO 25 KT. SEAS AROUND 3 FT. A CHANCE OF RAIN.
WED NIGHT
NW WINDS 20 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.
ANZ237-211800-
BLOCK ISLAND SOUND-
104 AM EDT SAT MAR 21 2026
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT EARLY THIS
MORNING...
REST OF TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
SEAS 3 TO 5 FT. WAVE DETAIL: SW 5 FT AT 7 SECONDS AND SE 4 FT AT
8 SECONDS. SHOWERS LIKELY.
SAT
NW WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
5 FT. WAVE DETAIL: SW 4 FT AT 7 SECONDS AND SE 4 FT AT 8 SECONDS.
SAT NIGHT
NE WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT.
SEAS 2 TO 4 FT. WAVE DETAIL: SW 3 FT AT 7 SECONDS AND SE 3 FT AT
8 SECONDS.
SUN
S 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 2 FT AT 8 SECONDS.
SUN NIGHT AND MON
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: NE 4 FT AT 6 SECONDS AND SW 3 FT AT
6 SECONDS. RAIN LIKELY .
MON NIGHT
N WINDS 15 TO 20 KT. SEAS 2 TO 4 FT. WAVE DETAIL: E
4 FT AT 7 SECONDS AND NW 2 FT AT 4 SECONDS.
TUE AND TUE NIGHT
NW WINDS 15 TO 20 KT, BECOMING SW. SEAS 2 TO
3 FT.
WED
SW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. A CHANCE OF RAIN.
WED NIGHT
NW 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.
ANZ230-211800-
BOSTON HARBOR-
104 AM EDT SAT MAR 21 2026
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT EARLY THIS
MORNING...
REST OF TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT.
WAVES AROUND 2 FT. A CHANCE OF SHOWERS.
SAT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES AROUND
2 FT.
SAT NIGHT
N WINDS 5 TO 10 KT, BECOMING E AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
SUN
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES AROUND 2 FT. A CHANCE OF RAIN IN THE MORNING, THEN RAIN
LIKELY IN THE AFTERNOON.
SUN NIGHT
W WINDS 10 TO 15 KT, BECOMING N 15 TO 20 KT AFTER
MIDNIGHT. WAVES AROUND 2 FT. RAIN LIKELY.
MON
N WINDS 15 TO 20 KT. WAVES AROUND 2 FT. A CHANCE OF RAIN.
MON NIGHT
N WINDS 15 TO 20 KT. WAVES AROUND 2 FT, EXCEPT 3 TO
5 FT AT THE OUTER HARBOR ENTRANCE.
TUE AND TUE NIGHT
NW WINDS 10 TO 15 KT, BECOMING SW 15 TO
20 KT. WAVES AROUND 2 FT.
WED AND WED NIGHT
SW WINDS 15 TO 20 KT, BECOMING W. GUSTS UP
TO 25 KT. WAVES AROUND 2 FT. A CHANCE OF RAIN.
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 SAT MAR 21 2026
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT EARLY THIS
MORNING...
REST OF TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT.
WAVES 2 TO 4 FT. SHOWERS.
SAT
NW WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT. WAVES 2 TO
3 FT.
SAT NIGHT
N WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT.
WAVES 2 TO 3 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES 2 TO
3 FT. A CHANCE OF RAIN IN THE AFTERNOON.
SUN NIGHT AND MON
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
WAVES 2 TO 3 FT. RAIN LIKELY .
MON NIGHT
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. WAVES 2 TO 3 FT.
TUE AND TUE NIGHT
NW WINDS 10 TO 15 KT, BECOMING SW WITH GUSTS
UP TO 20 KT. WAVES AROUND 2 FT.
WED
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES 2 TO
3 FT. A CHANCE OF RAIN.
WED NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 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.
FOR THE LATEST UPDATES...PLEASE VISIT OUR WEBPAGE AT
WWW.WEATHER.GOV/BOSTON
YOU CAN FOLLOW US ON FACEBOOK AT
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.BOSTON.GOV
YOU CAN FOLLOW US ON TWITTER AT
@NWSBOSTON
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page