134
FZUS51 KBOX 220204
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1004 PM EDT THU MAY 21 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-221500-
1004 PM EDT THU MAY 21 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
STRONG HIGH PRES OVER THE GT LAKES WILL MOVE INTO THE WATERS FRI
AND FRI NIGHT. THE HIGH MOVES OFFSHORE SAT, THEN A WARM FRONT AND
LOW PRES WILL APPROACH THE WATERS FROM THE S ON SUN. THE LOW PRES
LIFTS NE ACROSS THE WATERS SUN NIGHT THEN INTO THE GULF OF MAINE
MON. WEAK HIGH PRES FOLLOWS TUE THEN A COLD FRONT WILL MOVE INTO THE
REGION FROM THE N WED.
ANZ250-221500-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
1004 PM EDT THU MAY 21 2026
OVERNIGHT
SW WINDS AROUND 5 KT, BECOMING N. SEAS AROUND 2 FT.
WAVE DETAIL: NE 2 FT AT 5 SECONDS AND SE 1 FOOT AT 9 SECONDS.
FRI
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: NE
2 FT AT 4 SECONDS AND NW 1 FOOT AT 3 SECONDS.
FRI NIGHT
S WINDS AROUND 5 KT. SEAS AROUND 2 FT IN THE
EVENING, THEN 1 FOOT OR LESS. WAVE DETAIL: NW 2 FT AT 3 SECONDS
AND NE 1 FOOT AT 4 SECONDS, BECOMING W 1 FOOT AT 2 SECONDS AND NE
1 FOOT AT 4 SECONDS.
SAT
E WINDS AROUND 5 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL: N
1 FOOT AT 3 SECONDS AND SE 1 FOOT AT 10 SECONDS.
SAT NIGHT
SE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS, THEN
AROUND 2 FT AFTER MIDNIGHT. WAVE DETAIL: E 1 FOOT AT 3 SECONDS
AND SE 1 FOOT AT 10 SECONDS, BECOMING SE 2 FT AT 9 SECONDS AND NE
1 FOOT AT 3 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SUN
E WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE
4 FT AT 5 SECONDS AND SW 1 FOOT AT 4 SECONDS. SHOWERS.
SUN NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT. SHOWERS.
MON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 4 TO
6 FT. SHOWERS LIKELY.
MON NIGHT
N WINDS 5 TO 10 KT. SEAS 4 TO 6 FT.
TUE AND TUE NIGHT
SW WINDS 5 TO 10 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.
ANZ251-221500-
MASSACHUSETTS BAY AND IPSWICH BAY-
1004 PM EDT THU MAY 21 2026
OVERNIGHT
SW WINDS AROUND 5 KT, BECOMING N. SEAS 1 FOOT OR
LESS, THEN AROUND 2 FT. WAVE DETAIL: SW 1 FOOT AT 2 SECONDS AND
NE 1 FOOT AT 5 SECONDS, BECOMING N 2 FT AT 5 SECONDS AND SE
1 FOOT AT 9 SECONDS.
FRI
NE WINDS AROUND 10 KT, BECOMING E IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: NE 2 FT AT 4 SECONDS AND W 1 FOOT AT
5 SECONDS.
FRI NIGHT
S WINDS 5 TO 10 KT, DIMINISHING TO AROUND 5 KT AFTER
MIDNIGHT. SEAS 1 FOOT OR LESS. WAVE DETAIL: NE 1 FOOT AT
4 SECONDS AND NW 1 FOOT AT 4 SECONDS.
SAT
NE WINDS AROUND 5 KT, BECOMING E IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: NE 1 FOOT AT 3 SECONDS AND SE 1 FOOT
AT 10 SECONDS.
SAT NIGHT
SE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS, THEN
AROUND 2 FT AFTER MIDNIGHT. WAVE DETAIL: E 1 FOOT AT 3 SECONDS
AND SE 1 FOOT AT 9 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SUN AND SUN NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 5 SECONDS AND SW 1 FOOT
AT 4 SECONDS. SHOWERS.
MON
NE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT. A CHANCE OF SHOWERS.
MON NIGHT THROUGH TUE NIGHT
SW WINDS 5 TO 10 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.
ANZ231-221500-
CAPE COD BAY-
1004 PM EDT THU MAY 21 2026
OVERNIGHT
S WINDS AROUND 5 KT, BECOMING NW. SEAS 1 FOOT OR
LESS, THEN AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND SE
1 FOOT AT 8 SECONDS, BECOMING N 1 FOOT AT 4 SECONDS AND SE 1 FOOT
AT 9 SECONDS.
FRI
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: N
1 FOOT AT 3 SECONDS AND SE 1 FOOT AT 9 SECONDS.
FRI NIGHT
SE WINDS AROUND 5 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: N 1 FOOT AT 4 SECONDS AND SE 1 FOOT AT 10 SECONDS.
SAT
E WINDS AROUND 5 KT, INCREASING TO 5 TO 10 KT IN THE
AFTERNOON. SEAS 1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT
4 SECONDS AND SE 1 FOOT AT 10 SECONDS.
SAT NIGHT THROUGH SUN NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP
TO 25 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 4 SECONDS AND N
1 FOOT AT 3 SECONDS. SHOWERS.
MON
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: E 2 FT
AT 4 SECONDS AND E 2 FT AT 17 SECONDS. A CHANCE OF SHOWERS.
MON NIGHT THROUGH TUE NIGHT
SW WINDS 5 TO 10 KT. SEAS 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.
ANZ254-221500-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
1004 PM EDT THU MAY 21 2026
OVERNIGHT
SE WINDS AROUND 5 KT, BECOMING N. SEAS 2 TO 3 FT.
WAVE DETAIL: N 2 FT AT 5 SECONDS AND S 2 FT AT 7 SECONDS.
FRI
NE WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT AT 5 SECONDS AND S
2 FT AT 8 SECONDS.
FRI NIGHT
E WINDS 5 TO 10 KT, DIMINISHING TO AROUND 5 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT AT 4 SECONDS AND
SE 2 FT AT 8 SECONDS.
SAT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT
AT 9 SECONDS AND N 1 FOOT AT 4 SECONDS.
SAT NIGHT
E WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
3 FT AT 7 SECONDS AND N 1 FOOT AT 3 SECONDS. A CHANCE OF SHOWERS
AFTER MIDNIGHT.
SUN AND SUN NIGHT
SE WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
SEAS 4 TO 6 FT. WAVE DETAIL: SE 6 FT AT 6 SECONDS AND SW 1 FOOT
AT 6 SECONDS. SHOWERS.
MON
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 5 TO
7 FT. A CHANCE OF SHOWERS.
MON NIGHT
NW WINDS 5 TO 10 KT. SEAS 4 TO 6 FT. A CHANCE OF
SHOWERS.
TUE
NW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. A CHANCE OF SHOWERS.
TUE NIGHT
SW WINDS 5 TO 10 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.
ANZ255-221500-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
1004 PM EDT THU MAY 21 2026
OVERNIGHT
E WINDS AROUND 5 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
3 FT AT 7 SECONDS AND E 1 FOOT AT 4 SECONDS.
FRI
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: NE 3 FT AT 4 SECONDS AND SW 2 FT AT 7 SECONDS.
FRI NIGHT
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
2 FT AT 4 SECONDS AND SE 2 FT AT 8 SECONDS.
SAT
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: E 2 FT AT 4 SECONDS AND SE 2 FT AT 8 SECONDS.
SAT NIGHT
E WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE 4 FT
AT 7 SECONDS AND N 2 FT AT 4 SECONDS. A CHANCE OF SHOWERS IN THE
EVENING, THEN SHOWERS LIKELY AFTER MIDNIGHT.
SUN
E WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 5 TO
7 FT. WAVE DETAIL: SE 7 FT AT 7 SECONDS AND NE 2 FT AT 4 SECONDS.
SHOWERS.
SUN NIGHT
SE WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT
AFTER MIDNIGHT. GUSTS UP TO 30 KT. SEAS 5 TO 7 FT. SHOWERS.
MON
W WINDS AROUND 10 KT. SEAS 5 TO 7 FT. A CHANCE OF SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. A CHANCE OF
SHOWERS.
TUE
NW WINDS AROUND 5 KT. SEAS 2 TO 4 FT. A CHANCE OF SHOWERS.
TUE NIGHT
SW WINDS 5 TO 10 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.
ANZ256-221500-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
1004 PM EDT THU MAY 21 2026
OVERNIGHT
SE WINDS AROUND 5 KT, BECOMING NE. SEAS 2 TO 3 FT.
WAVE DETAIL: S 3 FT AT 7 SECONDS AND E 1 FOOT AT 4 SECONDS.
FRI
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: NE 3 FT AT 4 SECONDS AND SW 2 FT AT 7 SECONDS.
FRI NIGHT
E WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT AT 5 SECONDS AND SE
2 FT AT 8 SECONDS.
SAT
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: E 3 FT AT 4 SECONDS AND SE 3 FT AT 8 SECONDS.
SAT NIGHT
E WINDS 15 TO 20 KT, INCREASING TO 20 TO 25 KT AFTER
MIDNIGHT. SEAS 3 TO 5 FT. WAVE DETAIL: SE 5 FT AT 8 SECONDS AND
NE 4 FT AT 4 SECONDS. SHOWERS.
SUN AND SUN NIGHT
E WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 5 TO 8 FT. WAVE DETAIL: SE 8 FT AT 8 SECONDS AND E 6 FT AT
9 SECONDS. SHOWERS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
MON
NW WINDS 5 TO 10 KT. SEAS 5 TO 7 FT. A CHANCE OF SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 4 TO 5 FT. A CHANCE OF
SHOWERS.
TUE AND TUE NIGHT
W WINDS 5 TO 10 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.
ANZ232-221500-
NANTUCKET SOUND-
1004 PM EDT THU MAY 21 2026
OVERNIGHT
SE WINDS AROUND 5 KT, BECOMING NE. SEAS AROUND 2 FT.
WAVE DETAIL: E 1 FOOT AT 3 SECONDS AND SW 1 FOOT AT 6 SECONDS.
FRI
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. WAVE DETAIL: NE 2 FT AT 4 SECONDS AND SW 1 FOOT AT
7 SECONDS.
FRI NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT IN THE EVENING,
THEN 1 FOOT OR LESS. WAVE DETAIL: E 1 FOOT AT 3 SECONDS AND NW
1 FOOT AT 6 SECONDS, BECOMING E 1 FOOT AT 4 SECONDS AND NW 1 FOOT
AT 6 SECONDS.
SAT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: NW
1 FOOT AT 3 SECONDS AND E 1 FOOT AT 4 SECONDS.
SAT NIGHT
E WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: E 2 FT AT 3 SECONDS AND N
1 FOOT AT 3 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN
SHOWERS LIKELY AFTER MIDNIGHT.
SUN AND SUN NIGHT
SE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 3 TO 5 FT. WAVE DETAIL: SE 5 FT AT 6 SECONDS AND SW 1 FOOT
AT 10 SECONDS. SHOWERS.
MON AND MON NIGHT
NW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. A
CHANCE OF SHOWERS.
TUE AND TUE NIGHT
NW WINDS 5 TO 10 KT, BECOMING SW. 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.
ANZ233-221500-
VINEYARD SOUND-
1004 PM EDT THU MAY 21 2026
OVERNIGHT
SE WINDS AROUND 5 KT, BECOMING NE. SEAS AROUND 2 FT.
WAVE DETAIL: E 1 FOOT AT 3 SECONDS AND SW 1 FOOT AT 6 SECONDS.
FRI
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE MORNING.
SEAS AROUND 2 FT. WAVE DETAIL: NE 2 FT AT 3 SECONDS AND SW 1 FOOT
AT 7 SECONDS.
FRI NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT IN THE EVENING,
THEN 1 FOOT OR LESS. WAVE DETAIL: E 1 FOOT AT 3 SECONDS AND NW
1 FOOT AT 6 SECONDS, BECOMING NE 1 FOOT AT 4 SECONDS AND S 1 FOOT
AT 7 SECONDS.
SAT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: N
1 FOOT AT 3 SECONDS AND S 1 FOOT AT 8 SECONDS.
SAT NIGHT
E WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: NE 2 FT AT 3 SECONDS AND S
1 FOOT AT 8 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN
SHOWERS LIKELY AFTER MIDNIGHT.
SUN AND SUN NIGHT
E WINDS 20 TO 25 KT. SEAS 3 TO 5 FT. WAVE
DETAIL: E 3 FT AT 4 SECONDS AND S 3 FT AT 9 SECONDS. SHOWERS.
MON
NW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. A CHANCE OF SHOWERS.
MON NIGHT THROUGH TUE NIGHT
SW WINDS 5 TO 10 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.
ANZ234-221500-
BUZZARDS BAY-
1004 PM EDT THU MAY 21 2026
OVERNIGHT
SE WINDS AROUND 5 KT, BECOMING N. SEAS AROUND 2 FT.
WAVE DETAIL: E 1 FOOT AT 2 SECONDS AND SW 1 FOOT AT 6 SECONDS.
FRI
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE MORNING.
SEAS AROUND 2 FT. WAVE DETAIL: NE 1 FOOT AT 2 SECONDS AND SW
1 FOOT AT 6 SECONDS.
FRI NIGHT
E WINDS 5 TO 10 KT, DIMINISHING TO AROUND 5 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR LESS.
WAVE DETAIL: E 1 FOOT AT 3 SECONDS AND NW 1 FOOT AT 6 SECONDS,
BECOMING NE 1 FOOT AT 2 SECONDS AND N 1 FOOT AT 5 SECONDS.
SAT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: E
1 FOOT AT 2 SECONDS AND NW 1 FOOT AT 3 SECONDS.
SAT NIGHT THROUGH SUN NIGHT
E WINDS 20 TO 25 KT. SEAS 2 TO
4 FT. WAVE DETAIL: NE 3 FT AT 3 SECONDS AND SE 1 FOOT AT
8 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS.
MON
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NE
1 FOOT AT 3 SECONDS AND W 1 FOOT AT 5 SECONDS. A CHANCE OF
SHOWERS.
MON NIGHT THROUGH TUE NIGHT
SW WINDS 5 TO 10 KT. SEAS 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.
ANZ235-221500-
RHODE ISLAND SOUND-
1004 PM EDT THU MAY 21 2026
OVERNIGHT
SE WINDS AROUND 5 KT, BECOMING NE. SEAS 2 TO 3 FT.
WAVE DETAIL: SW 3 FT AT 7 SECONDS AND E 1 FOOT AT 3 SECONDS.
FRI
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: NE 2 FT AT 3 SECONDS AND SW 2 FT AT 7 SECONDS.
FRI NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: E
2 FT AT 5 SECONDS AND NW 1 FOOT AT 6 SECONDS.
SAT
E WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT
AT 5 SECONDS AND NW 1 FOOT AT 3 SECONDS.
SAT NIGHT
E WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE 4 FT
AT 7 SECONDS AND NE 2 FT AT 3 SECONDS. SHOWERS.
SUN
E WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
6 FT. WAVE DETAIL: SE 6 FT AT 8 SECONDS AND NE 3 FT AT 4 SECONDS.
SHOWERS.
SUN NIGHT
E WINDS 20 TO 25 KT, DIMINISHING TO 10 TO 15 KT
AFTER MIDNIGHT. SEAS 5 TO 7 FT. SHOWERS.
MON
NW WINDS 5 TO 10 KT. SEAS 4 TO 6 FT. A CHANCE OF SHOWERS.
MON NIGHT THROUGH TUE NIGHT
SW WINDS 5 TO 10 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.
ANZ237-221500-
BLOCK ISLAND SOUND-
1004 PM EDT THU MAY 21 2026
OVERNIGHT
SE WINDS AROUND 5 KT, BECOMING NE. SEAS AROUND 2 FT.
WAVE DETAIL: S 2 FT AT 7 SECONDS AND E 1 FOOT AT 4 SECONDS.
FRI
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: NE 2 FT AT 4 SECONDS AND S 2 FT AT 7 SECONDS.
FRI NIGHT
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
2 FT AT 6 SECONDS AND NW 1 FOOT AT 6 SECONDS.
SAT
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SE 3 FT AT 7 SECONDS AND E 2 FT AT 4 SECONDS.
SAT NIGHT
E WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE 4 FT
AT 7 SECONDS AND E 3 FT AT 4 SECONDS. SHOWERS.
SUN
E WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
6 FT. WAVE DETAIL: SE 6 FT AT 8 SECONDS AND E 4 FT AT 5 SECONDS.
SHOWERS.
SUN NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT, BECOMING
NE 10 TO 15 KT AFTER MIDNIGHT. SEAS 5 TO 7 FT. SHOWERS LIKELY,
MAINLY IN THE EVENING.
MON
NW WINDS 5 TO 10 KT. SEAS 4 TO 6 FT. A CHANCE OF SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
TUE AND TUE NIGHT
SW WINDS 5 TO 10 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.
ANZ230-221500-
BOSTON HARBOR-
1004 PM EDT THU MAY 21 2026
OVERNIGHT
SW WINDS AROUND 5 KT, BECOMING N. WAVES 1 FOOT OR
LESS.
FRI
NE WINDS AROUND 10 KT, BECOMING E IN THE AFTERNOON. WAVES
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON.
FRI NIGHT
SE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
SAT NIGHT THROUGH SUN NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP
TO 25 KT. WAVES 2 TO 3 FT. SHOWERS.
MON
N WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS. A CHANCE OF
SHOWERS.
MON NIGHT THROUGH TUE NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FOOT
OR LESS.
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.
ANZ236-221500-
NARRAGANSETT BAY-
1004 PM EDT THU MAY 21 2026
OVERNIGHT
S WINDS AROUND 5 KT, BECOMING N. WAVES AROUND 2 FT.
FRI
NE WINDS 10 TO 15 KT. WAVES AROUND 2 FT.
FRI NIGHT
E WINDS 5 TO 10 KT, DIMINISHING TO AROUND 5 KT AFTER
MIDNIGHT. WAVES AROUND 2 FT.
SAT
E WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
SAT NIGHT THROUGH SUN NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP
TO 25 KT. WAVES 2 TO 4 FT. SHOWERS.
MON
NW WINDS 5 TO 10 KT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS.
MON NIGHT THROUGH TUE NIGHT
SW WINDS 5 TO 10 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.
ANZ280-221500-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
1004 PM EDT THU MAY 21 2026
OVERNIGHT
SW WINDS AROUND 5 KT, BECOMING N. SEAS 2 TO 3 FT.
WAVE DETAIL: NE 2 FT AT 4 SECONDS AND S 2 FT AT 8 SECONDS.
FRI
NE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT
AT 4 SECONDS AND S 2 FT AT 8 SECONDS.
FRI NIGHT
S WINDS AROUND 5 KT, BECOMING W AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 9 SECONDS AND N 1 FOOT AT
4 SECONDS.
SAT
NE WINDS AROUND 5 KT, BECOMING E IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND SE 1 FOOT AT
8 SECONDS.
SAT NIGHT
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SE 2 FT AT 9 SECONDS AND N 1 FOOT AT 3 SECONDS.
SUN
E WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 2 TO 3 FT, BUILDING TO 3 TO
5 FT IN THE AFTERNOON. WAVE DETAIL: SE 3 FT AT 4 SECONDS AND SE
3 FT AT 7 SECONDS, BECOMING SE 4 FT AT 6 SECONDS AND SE 1 FOOT AT
12 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS
LIKELY IN THE AFTERNOON.
SUN NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS
4 TO 6 FT. SHOWERS.
MON
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO
8 FT. A CHANCE OF SHOWERS.
MON NIGHT
NW WINDS 5 TO 10 KT. SEAS 5 TO 7 FT.
TUE AND TUE NIGHT
W WINDS 5 TO 10 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.
ANZ281-221500-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
1004 PM EDT THU MAY 21 2026
OVERNIGHT
SE WINDS AROUND 5 KT, BECOMING N. SEAS 2 TO 3 FT.
WAVE DETAIL: S 3 FT AT 7 SECONDS AND N 2 FT AT 5 SECONDS.
FRI
NE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT
AT 5 SECONDS AND S 2 FT AT 7 SECONDS.
FRI NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: N
2 FT AT 4 SECONDS AND S 2 FT AT 8 SECONDS.
SAT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: NE 2 FT
AT 4 SECONDS AND SE 2 FT AT 9 SECONDS.
SAT NIGHT
E WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
3 FT AT 7 SECONDS AND N 2 FT AT 3 SECONDS. A CHANCE OF SHOWERS.
SUN
E WINDS 15 TO 20 KT, INCREASING TO 20 TO 25 KT IN THE
AFTERNOON. GUSTS UP TO 30 KT. SEAS 4 TO 6 FT. WAVE DETAIL: SE
6 FT AT 6 SECONDS. SHOWERS.
SUN NIGHT
E WINDS 20 TO 25 KT, BECOMING SE 15 TO 20 KT AFTER
MIDNIGHT. GUSTS UP TO 30 KT. SEAS 5 TO 7 FT, BUILDING TO 6 TO
9 FT AFTER MIDNIGHT. SHOWERS.
MON
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 6 TO
9 FT. A CHANCE OF SHOWERS.
MON NIGHT
NW WINDS 5 TO 10 KT. SEAS 4 TO 6 FT. A CHANCE OF
SHOWERS.
TUE
NW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. A CHANCE OF SHOWERS.
TUE NIGHT
SW WINDS 5 TO 10 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.
ANZ282-221500-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
1004 PM EDT THU MAY 21 2026
OVERNIGHT
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
3 FT AT 7 SECONDS AND N 2 FT AT 5 SECONDS.
FRI
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: N 2 FT AT 6 SECONDS AND S 2 FT AT 7 SECONDS.
FRI NIGHT
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N
2 FT AT 5 SECONDS AND SE 2 FT AT 7 SECONDS.
SAT
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SE 3 FT AT 7 SECONDS AND N 2 FT AT 4 SECONDS.
SAT NIGHT
E WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SE 5 FT
AT 7 SECONDS AND NE 2 FT AT 4 SECONDS. A CHANCE OF SHOWERS IN THE
EVENING, THEN SHOWERS LIKELY AFTER MIDNIGHT.
SUN
E WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
6 FT, BUILDING TO 5 TO 8 FT IN THE AFTERNOON. WAVE DETAIL: E 6 FT
AT 6 SECONDS, BECOMING SE 8 FT AT 8 SECONDS AND E 4 FT AT
5 SECONDS. SHOWERS.
SUN NIGHT
SE WINDS 20 TO 25 KT, BECOMING S 15 TO 20 KT AFTER
MIDNIGHT. GUSTS UP TO 30 KT. SEAS 7 TO 10 FT. SHOWERS.
MON
SW WINDS 5 TO 10 KT. SEAS 5 TO 8 FT. A CHANCE OF SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 4 TO 6 FT. A CHANCE OF
SHOWERS.
TUE
NW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. A CHANCE OF SHOWERS.
TUE NIGHT
SW WINDS 5 TO 10 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.
ANZ283-221500-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
1004 PM EDT THU MAY 21 2026
OVERNIGHT
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
3 FT AT 7 SECONDS AND NE 2 FT AT 4 SECONDS.
FRI
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: N 3 FT AT 6 SECONDS AND S 2 FT AT 8 SECONDS.
FRI NIGHT
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
AROUND 3 FT. WAVE DETAIL: NE 3 FT AT 4 SECONDS AND SE 3 FT AT
8 SECONDS.
SAT
E WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
4 FT. WAVE DETAIL: SE 4 FT AT 7 SECONDS AND N 3 FT AT 4 SECONDS.
A CHANCE OF SHOWERS IN THE AFTERNOON.
SAT NIGHT
E WINDS 15 TO 20 KT, INCREASING TO 20 TO 25 KT AFTER
MIDNIGHT. GUSTS UP TO 30 KT. SEAS 4 TO 6 FT. WAVE DETAIL: SE 6 FT
AT 9 SECONDS AND NE 4 FT AT 5 SECONDS. SHOWERS.
SUN
E WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS 5 TO
7 FT, BUILDING TO 7 TO 10 FT IN THE AFTERNOON. WAVE DETAIL: SE
7 FT AT 9 SECONDS AND NE 4 FT AT 6 SECONDS, BECOMING SE 10 FT AT
9 SECONDS AND NE 3 FT AT 5 SECONDS. SHOWERS.
SUN NIGHT
SE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT,
BECOMING S 10 TO 15 KT WITH GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS 8 TO 11 FT. SHOWERS.
MON
W WINDS 5 TO 10 KT. SEAS 5 TO 8 FT. A CHANCE OF SHOWERS.
MON NIGHT AND TUE
W WINDS 5 TO 10 KT, BECOMING NW. SEAS 3 TO
5 FT. A CHANCE OF SHOWERS.
TUE NIGHT
SW WINDS 5 TO 10 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.
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