858
FZUS51 KBOX 211405
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1005 AM EDT THU MAY 21 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-220300-
1005 AM EDT THU MAY 21 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
STRONG HIGH PRES BUILDS OVER THE GT LAKES THU AND MOVES INTO THE
WATERS FRI. THE HIGH MOVES OFFSHORE BY SAT AS A FRONTAL BOUNDARY
APPROACHES FROM THE S. GUSTY WINDS SUNDAY AS LOW PRESSURE PASSES
OVER THE WATERS.
ANZ250-220300-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
1005 AM EDT THU MAY 21 2026
THIS AFTERNOON
NE WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT,
BECOMING E. SEAS 2 TO 3 FT. WAVE DETAIL: NW 2 FT AT 4 SECONDS AND
SE 2 FT AT 9 SECONDS. A SLIGHT CHANCE OF SHOWERS.
TONIGHT
S WINDS AROUND 5 KT, BECOMING N AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: W 1 FOOT AT 3 SECONDS AND NE 1 FOOT AT
5 SECONDS.
FRI
NE WINDS AROUND 10 KT, BECOMING E IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: N 2 FT AT 3 SECONDS AND SE 1 FOOT AT
9 SECONDS.
FRI NIGHT
S WINDS AROUND 5 KT, BECOMING W AROUND 5 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT AT 4 SECONDS AND
SE 1 FOOT AT 10 SECONDS.
SAT
E WINDS AROUND 5 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL: W
1 FOOT AT 2 SECONDS AND NE 1 FOOT AT 3 SECONDS.
SAT NIGHT
SE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS, THEN
AROUND 2 FT AFTER MIDNIGHT. WAVE DETAIL: NW 1 FOOT AT 2 SECONDS
AND E 1 FOOT AT 3 SECONDS, BECOMING SE 2 FT AT 10 SECONDS AND NE
1 FOOT AT 3 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 4 FT. SHOWERS LIKELY.
MON AND MON NIGHT
NE WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT,
BECOMING W. 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.
ANZ251-220300-
MASSACHUSETTS BAY AND IPSWICH BAY-
1005 AM EDT THU MAY 21 2026
THIS AFTERNOON
NE WINDS AROUND 10 KT, BECOMING E. SEAS AROUND
2 FT. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND SE 1 FOOT AT
9 SECONDS. A SLIGHT CHANCE OF SHOWERS.
TONIGHT
S WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: S 1 FOOT AT 3 SECONDS AND NE 1 FOOT
AT 4 SECONDS.
FRI
NE WINDS AROUND 10 KT, BECOMING E IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: SW 1 FOOT AT 3 SECONDS AND NE 1 FOOT
AT 3 SECONDS.
FRI NIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: NE 1 FOOT AT 4 SECONDS AND SE 1 FOOT
AT 10 SECONDS.
SAT
NE WINDS 5 TO 10 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: W 1 FOOT AT 2 SECONDS
AND E 1 FOOT AT 3 SECONDS, BECOMING 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. SHOWERS LIKELY.
MON AND MON NIGHT
NE WINDS 5 TO 10 KT, BECOMING SW. 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.
ANZ231-220300-
CAPE COD BAY-
1005 AM EDT THU MAY 21 2026
THIS AFTERNOON
NE WINDS 5 TO 10 KT. GUSTS UP TO 20 KT. SEAS
AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND SE 1 FOOT AT
9 SECONDS. A SLIGHT CHANCE OF SHOWERS.
TONIGHT
S WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND SE 1 FOOT
AT 9 SECONDS.
FRI
NE WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE MORNING.
SEAS AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 4 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
E WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS, THEN AROUND
2 FT AFTER MIDNIGHT. WAVE DETAIL: NW 1 FOOT AT 3 SECONDS AND E
1 FOOT AT 3 SECONDS, BECOMING E 2 FT AT 2 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. SHOWERS.
MON AND MON NIGHT
NW WINDS 5 TO 10 KT, BECOMING W. SEAS AROUND
2 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.
ANZ254-220300-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
1005 AM EDT THU MAY 21 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND N 2 FT AT
4 SECONDS. A SLIGHT CHANCE OF SHOWERS.
TONIGHT
SE WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. 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 AROUND 2 FT. WAVE DETAIL: N 2 FT AT 5 SECONDS AND
S 2 FT AT 8 SECONDS.
FRI NIGHT
E WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: N 2 FT AT 5 SECONDS AND SE 1 FOOT 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 4 FT. WAVE DETAIL: SE
3 FT AT 7 SECONDS AND E 2 FT AT 3 SECONDS. A CHANCE OF SHOWERS
AFTER MIDNIGHT.
SUN AND SUN NIGHT
E WINDS 20 TO 25 KT, DIMINISHING TO 15 TO
20 KT. GUSTS UP TO 30 KT. SEAS 3 TO 5 FT. SHOWERS LIKELY.
MON AND MON NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING W 5 TO 10 KT. SEAS 4 TO 6 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.
ANZ255-220300-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
1005 AM EDT THU MAY 21 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND NE 2 FT AT
3 SECONDS. A SLIGHT CHANCE OF SHOWERS.
TONIGHT
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
3 FT AT 7 SECONDS AND E 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: NE 2 FT AT 4 SECONDS AND SW 2 FT AT 7 SECONDS.
FRI NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: N
2 FT AT 5 SECONDS AND SE 2 FT AT 8 SECONDS.
SAT
E WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N 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 3 TO 5 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 AND SUN NIGHT
E WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 4 TO 6 FT. SHOWERS.
MON AND MON NIGHT
W WINDS 5 TO 10 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.
ANZ256-220300-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
1005 AM EDT THU MAY 21 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND NE 2 FT AT
3 SECONDS. A SLIGHT CHANCE OF SHOWERS.
TONIGHT
SE WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND E 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: E 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
4 FT. WAVE DETAIL: NE 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 4 TO 6 FT. WAVE DETAIL: SE 5 FT AT 7 SECONDS AND
NE 3 FT AT 4 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN
SHOWERS AFTER MIDNIGHT.
SUN AND SUN NIGHT
E WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 5 TO 7 FT. SHOWERS.
MON
W WINDS 5 TO 10 KT. SEAS 5 TO 6 FT. A CHANCE OF SHOWERS.
MON NIGHT
SW WINDS 5 TO 10 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.
ANZ232-220300-
NANTUCKET SOUND-
1005 AM EDT THU MAY 21 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: NE 2 FT AT 3 SECONDS AND W 1 FOOT
AT 6 SECONDS. A SLIGHT CHANCE OF SHOWERS.
TONIGHT
SE WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: E 1 FOOT AT 3 SECONDS AND W 1 FOOT AT
5 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 N
1 FOOT AT 6 SECONDS, BECOMING E 1 FOOT AT 4 SECONDS AND NW 1 FOOT
AT 4 SECONDS.
SAT
E WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT
IN THE AFTERNOON. WAVE DETAIL: N 1 FOOT AT 3 SECONDS AND E 1 FOOT
AT 4 SECONDS, BECOMING N 1 FOOT AT 3 SECONDS AND E 1 FOOT AT
3 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 SE
2 FT 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 WITH GUSTS UP TO 30 KT.
SEAS 2 TO 4 FT. SHOWERS.
MON AND MON NIGHT
W WINDS 5 TO 10 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.
ANZ233-220300-
VINEYARD SOUND-
1005 AM EDT THU MAY 21 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 7 SECONDS AND NE 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS THIS MORNING.
TONIGHT
SE WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: E 1 FOOT AT 3 SECONDS AND SW 1 FOOT AT
7 SECONDS.
FRI
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. WAVE DETAIL: NE 1 FOOT AT 2 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 3 SECONDS AND S 1 FOOT
AT 7 SECONDS.
SAT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: NE
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 4 FT. WAVE DETAIL: E 2 FT AT 3 SECONDS AND S
2 FT 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, DIMINISHING TO 15 TO
20 KT. SEAS 2 TO 4 FT. SHOWERS.
MON AND MON NIGHT
W WINDS 5 TO 10 KT, BECOMING SW. 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.
ANZ234-220300-
BUZZARDS BAY-
1005 AM EDT THU MAY 21 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING E 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: NE 1 FOOT
AT 2 SECONDS AND SW 1 FOOT AT 7 SECONDS. A CHANCE OF SHOWERS THIS
MORNING.
TONIGHT
SE WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR LESS. WAVE DETAIL: E
1 FOOT AT 2 SECONDS AND SW 1 FOOT AT 7 SECONDS, BECOMING E 1 FOOT
AT 3 SECONDS AND SW 1 FOOT AT 7 SECONDS.
FRI
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. 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 1 FOOT OR LESS. WAVE DETAIL: E 1 FOOT AT 2 SECONDS
AND S 1 FOOT AT 6 SECONDS.
SAT
E WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT
IN THE AFTERNOON. WAVE DETAIL: NE 1 FOOT AT 3 SECONDS AND SE
1 FOOT AT 8 SECONDS, BECOMING E 1 FOOT AT 2 SECONDS AND NW 1 FOOT
AT 3 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
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 3 FT. SHOWERS.
MON AND MON NIGHT
NW WINDS 5 TO 10 KT, BECOMING SW. SEAS
AROUND 2 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.
ANZ235-220300-
RHODE ISLAND SOUND-
1005 AM EDT THU MAY 21 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 7 SECONDS AND NE 2 FT AT
3 SECONDS. A CHANCE OF SHOWERS THIS MORNING.
TONIGHT
SE WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT. 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 AROUND
2 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.
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 6 SECONDS AND NE 2 FT AT 3 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. SHOWERS.
SUN NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT. SHOWERS LIKELY.
MON AND MON NIGHT
NW WINDS 5 TO 10 KT, BECOMING SW. 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.
ANZ237-220300-
BLOCK ISLAND SOUND-
1005 AM EDT THU MAY 21 2026
THIS AFTERNOON
NE WINDS 5 TO 10 KT. GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND NE 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS THIS MORNING.
TONIGHT
SE WINDS AROUND 5 KT, BECOMING NE AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: SW 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 AROUND
2 FT. WAVE DETAIL: E 2 FT AT 4 SECONDS AND S 2 FT AT 7 SECONDS.
FRI NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: E
2 FT AT 4 SECONDS AND SE 2 FT AT 7 SECONDS.
SAT
E WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 7 SECONDS AND E 2 FT AT
3 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
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 4 FT
AT 7 SECONDS AND E 3 FT AT 4 SECONDS. SHOWERS.
SUN AND SUN NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
SEAS 4 TO 6 FT. SHOWERS.
MON
W WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. A CHANCE OF SHOWERS.
MON NIGHT
W WINDS 5 TO 10 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.
ANZ230-220300-
BOSTON HARBOR-
1005 AM EDT THU MAY 21 2026
THIS AFTERNOON
NE WINDS 5 TO 10 KT, BECOMING E. WAVES 1 FOOT
OR LESS. A SLIGHT CHANCE OF SHOWERS.
TONIGHT
S WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
FRI
NE WINDS AROUND 10 KT, BECOMING E IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
FRI NIGHT
SE WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS.
SAT
NE WINDS 5 TO 10 KT, BECOMING E IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS, THEN
AROUND 2 FT AFTER MIDNIGHT. SHOWERS LIKELY AFTER MIDNIGHT.
SUN AND SUN NIGHT
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
WAVES 2 TO 3 FT. SHOWERS.
MON AND MON NIGHT
NE WINDS 5 TO 10 KT, BECOMING SW. WAVES
1 FOOT OR LESS. 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.
ANZ236-220300-
NARRAGANSETT BAY-
1005 AM EDT THU MAY 21 2026
THIS AFTERNOON
NE WINDS AROUND 10 KT, BECOMING E. WAVES AROUND
2 FT. A CHANCE OF SHOWERS.
TONIGHT
S WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. WAVES
AROUND 2 FT.
FRI
E WINDS AROUND 10 KT. WAVES AROUND 2 FT.
FRI NIGHT
SE WINDS 5 TO 10 KT, BECOMING E AFTER MIDNIGHT.
WAVES AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR LESS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS, THEN AROUND 2 FT
IN THE AFTERNOON.
SAT NIGHT
E WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS IN THE EVENING,
THEN SHOWERS LIKELY AFTER MIDNIGHT.
SUN AND SUN NIGHT
E WINDS 15 TO 20 KT, DIMINISHING TO 10 TO
15 KT. GUSTS UP TO 25 KT. WAVES 2 TO 4 FT. SHOWERS.
MON AND MON NIGHT
NW WINDS 5 TO 10 KT, BECOMING SW. WAVES 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.
ANZ280-220300-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
1005 AM EDT THU MAY 21 2026
THIS AFTERNOON
N WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT,
BECOMING NE. SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT AT 8 SECONDS AND
N 2 FT AT 4 SECONDS.
TONIGHT
SW WINDS AROUND 5 KT, BECOMING NW WITH GUSTS UP TO
20 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: NE 2 FT AT
5 SECONDS AND S 2 FT AT 8 SECONDS.
FRI
N WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT, BECOMING E IN
THE AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT AT 4 SECONDS
AND S 2 FT AT 8 SECONDS.
FRI NIGHT
S WINDS 5 TO 10 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: NW 1 FOOT AT 2 SECONDS AND NE 1 FOOT AT
3 SECONDS.
SAT NIGHT
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SE 2 FT AT 9 SECONDS AND NW 1 FOOT AT 2 SECONDS. A CHANCE OF
SHOWERS AFTER MIDNIGHT.
SUN
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
4 FT. SHOWERS LIKELY.
SUN NIGHT AND MON
E WINDS 15 TO 20 KT, BECOMING SE 10 TO
15 KT. GUSTS UP TO 25 KT. SEAS 4 TO 6 FT. SHOWERS LIKELY.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 4 TO 6 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.
ANZ281-220300-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
1005 AM EDT THU MAY 21 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT AT 7 SECONDS AND N 2 FT AT
4 SECONDS.
TONIGHT
E WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. 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. GUSTS UP TO 20 KT IN THE MORNING.
SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT AT 4 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: 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 4 FT. WAVE DETAIL: SE
3 FT AT 8 SECONDS AND NE 2 FT AT 4 SECONDS. A CHANCE OF SHOWERS
AFTER MIDNIGHT.
SUN AND SUN NIGHT
E WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 4 TO 6 FT. SHOWERS LIKELY.
MON
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO
7 FT. SHOWERS LIKELY.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 5 TO 7 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.
ANZ282-220300-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
1005 AM EDT THU MAY 21 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: SW 4 FT AT 7 SECONDS AND N 3 FT AT
4 SECONDS. A SLIGHT CHANCE OF SHOWERS.
TONIGHT
E WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND N 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: NE 2 FT AT 5 SECONDS AND S 2 FT AT 8 SECONDS.
FRI NIGHT
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N
3 FT AT 4 SECONDS AND SE 2 FT AT 7 SECONDS.
SAT
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: SE 3 FT AT 7 SECONDS AND N 1 FOOT AT
4 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
SAT NIGHT
E WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 4 FT, BUILDING TO 4 TO 6 FT AFTER MIDNIGHT. WAVE DETAIL: SE
4 FT AT 7 SECONDS AND N 1 FOOT AT 4 SECONDS, BECOMING SE 4 FT AT
7 SECONDS AND NE 1 FOOT AT 4 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 5 TO 7 FT. SHOWERS.
MON
SW WINDS AROUND 10 KT. SEAS 6 TO 7 FT. A CHANCE OF
SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 4 TO 6 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.
ANZ283-220300-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
1005 AM EDT THU MAY 21 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT AT 7 SECONDS AND N 3 FT AT
5 SECONDS. A SLIGHT CHANCE OF SHOWERS.
TONIGHT
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NE 5 TO 10 KT AFTER MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: NE
3 FT AT 4 SECONDS AND S 3 FT AT 7 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 SE 2 FT AT 8 SECONDS.
FRI NIGHT
E WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 2 TO 3 FT. WAVE DETAIL: NE 3 FT AT 4 SECONDS AND SE
3 FT AT 7 SECONDS.
SAT
E 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 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 5 TO 7 FT. WAVE DETAIL: E 6 FT
AT 8 SECONDS AND NE 3 FT AT 4 SECONDS. SHOWERS.
SUN AND SUN NIGHT
E WINDS 20 TO 25 KT, BECOMING SE 15 TO
20 KT. GUSTS UP TO 30 KT. SEAS 6 TO 8 FT. SHOWERS.
MON
W WINDS 5 TO 10 KT. SEAS 6 TO 8 FT. A CHANCE OF SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 4 TO 6 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.
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