657
FZUS51 KBOX 182004
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
404 PM EDT WED MAR 18 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 25 NM
ANZ200-190900-
404 PM EDT WED MAR 18 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
HIGH PRES REMAINS OVER THE WATERS THROUGH FRI. A SERIES OF WEAK LOW
PRES SYSTEMS WILL MOVE THROUGH NEW ENGLAND OVER THE WEEKEND,
FOLLOWED BY HIGH PRES EARLY NEXT WEEK.
ANZ250-190900-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
404 PM EDT WED MAR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON
TONIGHT
S WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SE
5 FT AT 10 SECONDS AND NW 2 FT AT 4 SECONDS.
THU
SE WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT IN THE
AFTERNOON. SEAS 3 TO 4 FT. WAVE DETAIL: SE 4 FT AT 10 SECONDS AND
S 2 FT AT 3 SECONDS.
THU NIGHT
S WINDS 10 TO 15 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE
3 FT AT 9 SECONDS AND S 2 FT AT 3 SECONDS.
FRI
SW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE 3 FT
AT 8 SECONDS AND SW 2 FT AT 3 SECONDS.
FRI NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
3 TO 5 FT. WAVE DETAIL: E 4 FT AT 9 SECONDS AND S 3 FT AT
4 SECONDS. RAIN LIKELY AFTER MIDNIGHT.
SAT
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. WAVE DETAIL: S 4 FT AT 4 SECONDS AND E 4 FT AT 9 SECONDS. A
CHANCE OF RAIN.
SAT NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT.
SUN AND SUN NIGHT
SW WINDS 15 TO 20 KT, BECOMING NW 20 TO
25 KT. GUSTS UP TO 30 KT. SEAS 3 TO 5 FT. A CHANCE OF RAIN.
MON AND MON NIGHT
N 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.
ANZ251-190900-
MASSACHUSETTS BAY AND IPSWICH BAY-
404 PM EDT WED MAR 18 2026
TONIGHT
S WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT AT 10 SECONDS AND
NW 2 FT AT 4 SECONDS.
THU
S WINDS 5 TO 10 KT, BECOMING SE 10 TO 15 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT AT 10 SECONDS AND
SE 2 FT AT 3 SECONDS.
THU NIGHT
S WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
2 FT AT 3 SECONDS AND E 2 FT AT 9 SECONDS.
FRI
SW WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS AND E 2 FT AT
9 SECONDS.
FRI NIGHT
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 3 FT AT
9 SECONDS. A CHANCE OF RAIN IN THE EVENING, THEN RAIN LIKELY
AFTER MIDNIGHT.
SAT
S WINDS AROUND 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND E 3 FT AT 9 SECONDS. A
CHANCE OF RAIN.
SAT NIGHT
SW WINDS 15 TO 20 KT. SEAS 2 TO 4 FT.
SUN AND SUN NIGHT
SW WINDS 15 TO 20 KT, BECOMING NW 20 TO
25 KT. SEAS 2 TO 4 FT. A CHANCE OF RAIN.
MON
N WINDS 20 TO 25 KT. SEAS 3 TO 5 FT.
MON NIGHT
N WINDS 20 TO 25 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.
ANZ231-190900-
CAPE COD BAY-
404 PM EDT WED MAR 18 2026
TONIGHT
SE WINDS AROUND 5 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NW
2 FT AT 5 SECONDS AND E 2 FT AT 8 SECONDS.
THU
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: E 2 FT
AT 6 SECONDS AND N 1 FOOT AT 4 SECONDS.
THU NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SE 2 FT AT 9 SECONDS AND SE 1 FOOT AT 2 SECONDS.
FRI
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
2 FT AT 8 SECONDS AND SW 1 FOOT AT 2 SECONDS.
FRI NIGHT AND SAT
SW 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 E 2 FT AT
9 SECONDS. A CHANCE OF RAIN.
SAT NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: E 2 FT AT 9 SECONDS AND SW 1 FOOT AT
3 SECONDS.
SUN
SW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. A CHANCE OF RAIN.
SUN NIGHT
NW WINDS 20 TO 25 KT. SEAS 2 TO 4 FT. A CHANCE OF
RAIN AND SNOW.
MON AND MON NIGHT
N WINDS 20 TO 25 KT, DIMINISHING TO 15 TO
20 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.
ANZ254-190900-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
404 PM EDT WED MAR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON
TONIGHT
SE WINDS AROUND 5 KT. SEAS 4 TO 6 FT. WAVE DETAIL: SE
5 FT AT 10 SECONDS AND NW 2 FT AT 6 SECONDS.
THU
SE WINDS AROUND 5 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SE 4 FT
AT 9 SECONDS AND N 1 FOOT AT 5 SECONDS.
THU NIGHT
S WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE
4 FT AT 9 SECONDS AND N 1 FOOT AT 4 SECONDS.
FRI
SW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE 3 FT
AT 8 SECONDS AND SW 1 FOOT AT 3 SECONDS.
FRI NIGHT AND SAT
S WINDS 15 TO 20 KT. SEAS 3 TO 5 FT. WAVE
DETAIL: S 4 FT AT 5 SECONDS AND E 4 FT AT 9 SECONDS. A CHANCE OF
RAIN.
SAT NIGHT
SW WINDS 15 TO 20 KT. SEAS 3 TO 5 FT. WAVE DETAIL:
SW 3 FT AT 6 SECONDS AND E 3 FT AT 8 SECONDS.
SUN
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
4 FT. A CHANCE OF RAIN.
SUN NIGHT
NW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
4 TO 6 FT. A CHANCE OF RAIN.
MON AND MON NIGHT
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 5 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.
ANZ255-190900-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
404 PM EDT WED MAR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON
TONIGHT
SE WINDS AROUND 5 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S
5 FT AT 10 SECONDS AND W 1 FOOT AT 6 SECONDS.
THU
SE WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SE 4 FT
AT 9 SECONDS.
THU NIGHT
S WINDS AROUND 5 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
3 FT AT 9 SECONDS.
FRI
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT
AT 8 SECONDS AND SW 1 FOOT AT 2 SECONDS.
FRI NIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: SW 4 FT AT 5 SECONDS AND E
4 FT AT 9 SECONDS. A CHANCE OF RAIN AFTER MIDNIGHT.
SAT
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT. WAVE DETAIL: S 5 FT AT 6 SECONDS AND E 4 FT AT 9 SECONDS. A
CHANCE OF RAIN.
SAT NIGHT
SW WINDS 15 TO 20 KT. SEAS 3 TO 5 FT.
SUN
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
4 FT.
SUN NIGHT
NW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
3 TO 5 FT. A CHANCE OF RAIN AND SNOW.
MON
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
6 FT. A CHANCE OF RAIN.
MON NIGHT
N WINDS 20 TO 25 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.
ANZ256-190900-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
404 PM EDT WED MAR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON
TONIGHT
SE WINDS AROUND 5 KT. SEAS 4 TO 5 FT. WAVE DETAIL: S
5 FT AT 10 SECONDS AND W 1 FOOT AT 5 SECONDS.
THU
SE WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SE 4 FT
AT 9 SECONDS.
THU NIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
3 TO 4 FT. WAVE DETAIL: SE 4 FT AT 9 SECONDS.
FRI
SW WINDS 5 TO 10 KT. SEAS AROUND 3 FT. WAVE DETAIL: SE
3 FT AT 8 SECONDS AND SW 1 FOOT AT 3 SECONDS.
FRI NIGHT
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS AND SE
3 FT AT 9 SECONDS. A CHANCE OF RAIN AFTER MIDNIGHT.
SAT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT. WAVE DETAIL: S 5 FT AT 6 SECONDS AND E 3 FT AT 9 SECONDS. A
CHANCE OF RAIN IN THE MORNING.
SAT NIGHT
SW WINDS 15 TO 20 KT. SEAS 3 TO 5 FT.
SUN
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
4 FT.
SUN NIGHT
NW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
3 TO 4 FT. A CHANCE OF RAIN AND SNOW.
MON
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
5 FT. A CHANCE OF SNOW.
MON NIGHT
N WINDS 20 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.
ANZ232-190900-
NANTUCKET SOUND-
404 PM EDT WED MAR 18 2026
TONIGHT
SE WINDS AROUND 5 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
2 FT AT 10 SECONDS AND NW 1 FOOT AT 4 SECONDS.
THU
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
2 FT AT 9 SECONDS AND NW 1 FOOT AT 3 SECONDS.
THU NIGHT
S WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SE 1 FOOT AT 3 SECONDS AND SE 1 FOOT AT 9 SECONDS.
FRI
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
1 FOOT AT 2 SECONDS AND SE 1 FOOT AT 9 SECONDS.
FRI NIGHT AND SAT
SW WINDS 15 TO 20 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: S 3 FT AT 4 SECONDS AND E 2 FT AT 9 SECONDS. A CHANCE OF
RAIN.
SAT NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND E
1 FOOT AT 9 SECONDS.
SUN
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. A CHANCE OF RAIN.
SUN NIGHT
NW WINDS 20 TO 25 KT. SEAS 2 TO 3 FT. A CHANCE OF
RAIN AND SNOW.
MON
N WINDS 20 TO 25 KT. SEAS 3 TO 4 FT. A CHANCE OF SNOW.
MON NIGHT
N WINDS 15 TO 20 KT WITH GUSTS UP 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.
ANZ233-190900-
VINEYARD SOUND-
404 PM EDT WED MAR 18 2026
TONIGHT
SE WINDS AROUND 5 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
2 FT AT 9 SECONDS AND SW 1 FOOT AT 4 SECONDS.
THU
SE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT
AT 9 SECONDS.
THU NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S
2 FT AT 8 SECONDS AND S 1 FOOT AT 2 SECONDS.
FRI
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
2 FT AT 8 SECONDS AND SW 1 FOOT AT 3 SECONDS.
FRI NIGHT AND SAT
SW WINDS 15 TO 20 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: S 4 FT AT 7 SECONDS. A CHANCE OF RAIN.
SAT NIGHT
SW WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT
AFTER MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS.
SUN
SW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. A CHANCE OF RAIN.
SUN NIGHT
NW WINDS 20 TO 25 KT. SEAS 2 TO 3 FT. A CHANCE OF
RAIN AND SNOW.
MON
N WINDS 20 TO 25 KT. SEAS 2 TO 3 FT. A CHANCE OF SNOW.
MON NIGHT
N WINDS 15 TO 20 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.
ANZ234-190900-
BUZZARDS BAY-
404 PM EDT WED MAR 18 2026
TONIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S
2 FT AT 9 SECONDS AND SW 1 FOOT AT 4 SECONDS.
THU
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT
AT 9 SECONDS.
THU NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S
2 FT AT 8 SECONDS AND S 1 FOOT AT 2 SECONDS.
FRI
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT IN THE
AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: SW 1 FOOT AT 2 SECONDS
AND SE 1 FOOT AT 8 SECONDS.
FRI NIGHT AND SAT
SW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SW 3 FT AT 5 SECONDS AND SE 1 FOOT AT 8 SECONDS. A CHANCE
OF RAIN.
SAT NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 6 SECONDS AND
SE 1 FOOT AT 9 SECONDS.
SUN
SW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. A CHANCE OF RAIN.
SUN NIGHT
NW WINDS 20 TO 25 KT. SEAS 2 TO 3 FT. A CHANCE OF
RAIN AND SNOW.
MON AND MON NIGHT
N WINDS 20 TO 25 KT, DIMINISHING TO 15 TO
20 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.
ANZ235-190900-
RHODE ISLAND SOUND-
404 PM EDT WED MAR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
TONIGHT
SE WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S
5 FT AT 10 SECONDS.
THU
SE WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: S 4 FT
AT 9 SECONDS.
THU NIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 9 SECONDS.
FRI
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 8 SECONDS AND
SW 2 FT AT 3 SECONDS.
FRI 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 5 SECONDS AND SE
2 FT AT 8 SECONDS. RAIN LIKELY AFTER MIDNIGHT.
SAT
SW WINDS 15 TO 20 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S 5 FT
AT 6 SECONDS AND SE 2 FT AT 9 SECONDS. A CHANCE OF RAIN IN THE
MORNING.
SAT NIGHT
SW WINDS 15 TO 20 KT. SEAS 3 TO 5 FT, SUBSIDING TO
2 TO 3 FT AFTER MIDNIGHT.
SUN
SW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT.
SUN NIGHT
NW WINDS 20 TO 25 KT. SEAS AROUND 3 FT. A CHANCE OF
RAIN AND SNOW.
MON
N WINDS 20 TO 25 KT. SEAS 3 TO 4 FT. A CHANCE OF SNOW.
MON NIGHT
N WINDS 15 TO 20 KT WITH GUSTS UP 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.
ANZ237-190900-
BLOCK ISLAND SOUND-
404 PM EDT WED MAR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
TONIGHT
SE WINDS AROUND 5 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SE
5 FT AT 10 SECONDS.
THU
SE WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SE 4 FT
AT 9 SECONDS.
THU NIGHT
S WINDS AROUND 5 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
3 FT AT 9 SECONDS.
FRI
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT
AT 8 SECONDS AND SW 1 FOOT AT 4 SECONDS.
FRI NIGHT AND SAT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: S 4 FT AT 7 SECONDS. A CHANCE OF
RAIN IN THE EVENING, THEN RAIN LIKELY THROUGH THE DAY.
SAT NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 4 FT. WAVE DETAIL:
SW 3 FT AT 6 SECONDS AND SE 3 FT AT 9 SECONDS.
SUN
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT.
SUN NIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 3 FT. A CHANCE OF RAIN AND SNOW.
MON
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
4 FT. A CHANCE OF SNOW.
MON NIGHT
N WINDS 15 TO 20 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.
ANZ230-190900-
BOSTON HARBOR-
404 PM EDT WED MAR 18 2026
TONIGHT
S WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
THU
SE WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
THU NIGHT
S WINDS AROUND 10 KT. WAVES 1 FOOT OR LESS.
FRI
SW WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
FRI NIGHT AND SAT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
WAVES AROUND 2 FT. A CHANCE OF RAIN IN THE EVENING, THEN RAIN
LIKELY THROUGH THE DAY. A CHANCE OF RAIN IN THE AFTERNOON.
SAT NIGHT
SW WINDS 15 TO 20 KT. WAVES AROUND 2 FT.
SUN AND SUN NIGHT
W WINDS 15 TO 20 KT, BECOMING N 20 TO 25 KT.
WAVES AROUND 2 FT. A CHANCE OF RAIN.
MON AND MON NIGHT
N WINDS 20 TO 25 KT, DIMINISHING TO 15 TO
20 KT. WAVES AROUND 2 FT, EXCEPT 3 TO 5 FT AT THE OUTER HARBOR
ENTRANCE.
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.
ANZ236-190900-
NARRAGANSETT BAY-
404 PM EDT WED MAR 18 2026
TONIGHT
S WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT. WAVES
2 TO 3 FT.
THU
SE WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. WAVES
2 TO 3 FT.
THU NIGHT
S WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
FRI
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
FRI NIGHT AND SAT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
WAVES 2 TO 3 FT. A CHANCE OF RAIN IN THE EVENING, THEN RAIN
LIKELY THROUGH THE DAY.
SAT NIGHT
SW WINDS 10 TO 15 KT. WAVES 2 TO 3 FT.
SUN
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES 2 TO
3 FT. A CHANCE OF RAIN.
SUN NIGHT
NW WINDS 15 TO 20 KT. WAVES 2 TO 3 FT. A CHANCE OF
RAIN AND SNOW.
MON AND MON NIGHT
N WINDS 15 TO 20 KT, DIMINISHING TO 10 TO
15 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.
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