636
FZUS51 KBOX 201705
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
105 PM EDT MON APR 20 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-210600-
105 PM EDT MON APR 20 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
HIGH PRES BUILDS OVER THE WATERS EARLY THIS WEEK SUPPORTING
RELATIVELY CALM CONDITIONS WITH SEAS LESS THAN 4 FEET AND WINDS
GENERALLY 10 KNOTS OR LESS SUSTAINED. WEAK LOW PRES MAY PASS OVER
THE WATERS WED INTO THU BRINGING SCATTERED SHOWERS.
ANZ250-210600-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
105 PM EDT MON APR 20 2026
THIS AFTERNOON
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: W 2 FT AT 4 SECONDS AND SE 2 FT AT 7 SECONDS.
TONIGHT
N WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: N 3 FT AT 4 SECONDS AND NW
2 FT AT 4 SECONDS.
TUE
N WINDS 10 TO 15 KT, BECOMING NE 5 TO 10 KT IN THE
AFTERNOON. SEAS 2 TO 4 FT. WAVE DETAIL: N 3 FT AT 5 SECONDS AND E
2 FT AT 8 SECONDS.
TUE NIGHT
S WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NE
2 FT AT 4 SECONDS AND SE 2 FT AT 7 SECONDS.
WED AND WED NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS AND E 2 FT AT
9 SECONDS.
THU THROUGH FRI NIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
WAVE DETAIL: NW 2 FT AT 4 SECONDS AND NE 2 FT AT 5 SECONDS.
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.
ANZ251-210600-
MASSACHUSETTS BAY AND IPSWICH BAY-
105 PM EDT MON APR 20 2026
THIS AFTERNOON
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: W 2 FT AT 4 SECONDS AND E 2 FT AT 7 SECONDS.
TONIGHT
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: N 3 FT AT 4 SECONDS AND E 2 FT AT
8 SECONDS.
TUE
N WINDS 10 TO 15 KT, BECOMING E 5 TO 10 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: NE 3 FT AT 5 SECONDS AND
NW 2 FT AT 3 SECONDS.
TUE NIGHT
S WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL:
S 2 FT AT 3 SECONDS AND NE 2 FT AT 5 SECONDS.
WED AND WED NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS AND E 2 FT AT
9 SECONDS.
THU THROUGH FRI NIGHT
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
WAVE DETAIL: NW 2 FT AT 3 SECONDS AND E 2 FT AT 8 SECONDS.
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.
ANZ231-210600-
CAPE COD BAY-
105 PM EDT MON APR 20 2026
THIS AFTERNOON
NW WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE
DETAIL: N 2 FT AT 5 SECONDS AND S 1 FOOT AT 7 SECONDS. A SLIGHT
CHANCE OF RAIN.
TONIGHT
N WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL:
N 2 FT AT 4 SECONDS AND SE 1 FOOT AT 7 SECONDS.
TUE
N WINDS 10 TO 15 KT, BECOMING NE 5 TO 10 KT IN THE
AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT AT 3 SECONDS AND
N 2 FT AT 4 SECONDS.
TUE NIGHT
SE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: N 2 FT AT 5 SECONDS AND S 1 FOOT AT
5 SECONDS.
WED
S WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: S
1 FOOT AT 2 SECONDS AND N 1 FOOT AT 4 SECONDS. A CHANCE OF
SHOWERS IN THE MORNING.
WED NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 1 FOOT AT 3 SECONDS AND NE 1 FOOT AT 4 SECONDS.
THU THROUGH FRI NIGHT
W 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.
ANZ254-210600-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
105 PM EDT MON APR 20 2026
THIS AFTERNOON
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: NW 2 FT AT 5 SECONDS AND N 2 FT AT 6 SECONDS. A SLIGHT
CHANCE OF RAIN.
TONIGHT
W WINDS 5 TO 10 KT, BECOMING N 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: N 3 FT AT 5 SECONDS AND S
2 FT AT 7 SECONDS.
TUE
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING N
5 TO 10 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: N 3 FT
AT 5 SECONDS AND E 2 FT AT 8 SECONDS.
TUE NIGHT
SE WINDS AROUND 5 KT, BECOMING SW AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT AT 5 SECONDS AND E 2 FT AT
8 SECONDS.
WED AND WED NIGHT
SE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT AT 9 SECONDS AND SW 2 FT AT
4 SECONDS.
THU THROUGH FRI NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: E 3 FT AT 7 SECONDS AND S 2 FT AT 7 SECONDS.
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.
ANZ255-210600-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
105 PM EDT MON APR 20 2026
THIS AFTERNOON
W WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SW 2 FT AT 6 SECONDS AND E 2 FT AT 7 SECONDS.
TONIGHT
W WINDS AROUND 10 KT, BECOMING N 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT AT 4 SECONDS AND NE
2 FT AT 7 SECONDS.
TUE
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, DIMINISHING TO
5 TO 10 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: NW 3 FT
AT 4 SECONDS AND S 1 FOOT AT 6 SECONDS.
TUE NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
NE 1 FOOT AT 4 SECONDS AND W 1 FOOT AT 4 SECONDS.
WED
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
SEAS 2 TO 4 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND E 2 FT AT
7 SECONDS. A CHANCE OF SHOWERS.
WED NIGHT
SE WINDS 10 TO 15 KT, BECOMING E 5 TO 10 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: SW 3 FT AT 6 SECONDS AND E
2 FT AT 9 SECONDS.
THU THROUGH FRI
N WINDS 5 TO 10 KT. SEAS 2 TO 4 FT.
FRI NIGHT
S 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.
ANZ256-210600-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
105 PM EDT MON APR 20 2026
THIS AFTERNOON
W WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: W 2 FT AT 3 SECONDS AND S 2 FT AT 7 SECONDS.
TONIGHT
NW WINDS 10 TO 15 KT, BECOMING N WITH GUSTS UP TO
20 KT AFTER MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: N 3 FT AT
5 SECONDS AND S 2 FT AT 7 SECONDS.
TUE
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING NW
5 TO 10 KT IN THE AFTERNOON. SEAS 2 TO 4 FT. WAVE DETAIL: N 3 FT
AT 4 SECONDS AND S 1 FOOT AT 6 SECONDS.
TUE NIGHT
SW WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND
E 1 FOOT AT 4 SECONDS.
WED
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND E 1 FOOT AT
4 SECONDS. A CHANCE OF SHOWERS.
WED NIGHT
SE WINDS 5 TO 10 KT, BECOMING E AFTER MIDNIGHT. SEAS
3 TO 4 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND E 2 FT AT
9 SECONDS.
THU THROUGH FRI
W WINDS 5 TO 10 KT. SEAS 2 TO 4 FT.
FRI NIGHT
SE 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.
ANZ232-210600-
NANTUCKET SOUND-
105 PM EDT MON APR 20 2026
THIS AFTERNOON
W WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE
DETAIL: W 2 FT AT 3 SECONDS AND S 1 FOOT AT 6 SECONDS. A SLIGHT
CHANCE OF RAIN.
TONIGHT
NW WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT WITH GUSTS
UP TO 20 KT AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: NW
2 FT AT 4 SECONDS AND NE 2 FT AT 7 SECONDS.
TUE
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING NE
5 TO 10 KT IN THE AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: N
2 FT AT 4 SECONDS AND S 1 FOOT AT 6 SECONDS.
TUE NIGHT
SE WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: NW 1 FOOT AT 4 SECONDS AND E
1 FOOT AT 4 SECONDS.
WED
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND NE 1 FOOT
AT 4 SECONDS. A CHANCE OF SHOWERS.
WED NIGHT
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SE 2 FT AT 4 SECONDS AND W 1 FOOT AT 4 SECONDS.
THU THROUGH FRI 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.
ANZ233-210600-
VINEYARD SOUND-
105 PM EDT MON APR 20 2026
THIS AFTERNOON
W WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SW 2 FT AT 5 SECONDS AND N 1 FOOT AT 5 SECONDS. A SLIGHT
CHANCE OF RAIN.
TONIGHT
NW WINDS 10 TO 15 KT, BECOMING N WITH GUSTS UP TO
20 KT AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT AT
4 SECONDS AND W 2 FT AT 4 SECONDS.
TUE
N WINDS 10 TO 15 KT, BECOMING NE 5 TO 10 KT IN THE
AFTERNOON. SEAS AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS.
WAVE DETAIL: NE 1 FOOT AT 3 SECONDS AND NW 1 FOOT AT 4 SECONDS.
TUE NIGHT
S 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 SW
1 FOOT AT 3 SECONDS, BECOMING SW 2 FT AT 4 SECONDS AND NE 1 FOOT
AT 3 SECONDS.
WED
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. WAVE DETAIL: E 2 FT AT 4 SECONDS AND SW 2 FT AT 5 SECONDS.
A CHANCE OF SHOWERS.
WED NIGHT
SE WINDS 5 TO 10 KT, BECOMING E AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS AND SE 1 FOOT AT
4 SECONDS.
THU THROUGH FRI NIGHT
S 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.
ANZ234-210600-
BUZZARDS BAY-
105 PM EDT MON APR 20 2026
THIS AFTERNOON
SW WINDS 10 TO 15 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: W 1 FOOT AT 3 SECONDS AND N 1 FOOT AT 5 SECONDS. A SLIGHT
CHANCE OF RAIN.
TONIGHT
NW WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT WITH GUSTS
UP TO 20 KT AFTER MIDNIGHT. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT
AFTER MIDNIGHT. WAVE DETAIL: SW 1 FOOT AT 5 SECONDS AND N 1 FOOT
AT 5 SECONDS, BECOMING N 2 FT AT 3 SECONDS AND SW 1 FOOT AT
5 SECONDS.
TUE
N WINDS 10 TO 15 KT, BECOMING SE 5 TO 10 KT IN THE
AFTERNOON. SEAS AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS.
WAVE DETAIL: NE 1 FOOT AT 3 SECONDS AND NW 1 FOOT AT 4 SECONDS,
BECOMING NE 1 FOOT AT 2 SECONDS AND NW 1 FOOT AT 4 SECONDS.
TUE NIGHT
S WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS, THEN AROUND
2 FT AFTER MIDNIGHT. WAVE DETAIL: NE 1 FOOT AT 3 SECONDS AND SW
1 FOOT AT 3 SECONDS, BECOMING SW 1 FOOT AT 3 SECONDS AND E 1 FOOT
AT 4 SECONDS.
WED
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND E 1 FOOT AT
4 SECONDS. A CHANCE OF SHOWERS.
WED NIGHT
SE WINDS 5 TO 10 KT, BECOMING E AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 7 SECONDS AND E 1 FOOT AT
4 SECONDS.
THU THROUGH FRI NIGHT
S 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.
ANZ235-210600-
RHODE ISLAND SOUND-
105 PM EDT MON APR 20 2026
THIS AFTERNOON
W WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE
DETAIL: W 2 FT AT 3 SECONDS AND SE 2 FT AT 7 SECONDS. A SLIGHT
CHANCE OF RAIN.
TONIGHT
NW WINDS 10 TO 15 KT, BECOMING N WITH GUSTS UP TO
20 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT AT
3 SECONDS AND W 2 FT AT 3 SECONDS.
TUE
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING SW
5 TO 10 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT
AT 3 SECONDS AND NW 1 FOOT AT 3 SECONDS.
TUE NIGHT
SW WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 2 FT AT 3 SECONDS AND E 1 FOOT AT 3 SECONDS.
WED
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 SHOWERS.
WED NIGHT
SE WINDS 5 TO 10 KT, BECOMING E AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND SE 2 FT AT
4 SECONDS.
THU THROUGH FRI NIGHT
SE 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.
ANZ237-210600-
BLOCK ISLAND SOUND-
105 PM EDT MON APR 20 2026
THIS AFTERNOON
W WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SE 2 FT AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS. A SLIGHT
CHANCE OF RAIN.
TONIGHT
NW WINDS 10 TO 15 KT, BECOMING N WITH GUSTS UP TO
20 KT AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: NW 2 FT AT
3 SECONDS AND SE 2 FT AT 7 SECONDS.
TUE
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING S
5 TO 10 KT IN THE AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: NE
2 FT AT 3 SECONDS AND W 1 FOOT AT 3 SECONDS.
TUE NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 1 FOOT AT 2 SECONDS AND E 1 FOOT AT 3 SECONDS.
WED
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND SE 1 FOOT AT
2 SECONDS. A CHANCE OF SHOWERS.
WED NIGHT
SE WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND SW 1 FOOT AT
3 SECONDS.
THU THROUGH FRI NIGHT
SE 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.
ANZ230-210600-
BOSTON HARBOR-
105 PM EDT MON APR 20 2026
THIS AFTERNOON
W WINDS AROUND 10 KT. WAVES 1 FOOT OR LESS.
TONIGHT
NW WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. WAVES 1 FOOT OR LESS, THEN AROUND 2 FT AFTER MIDNIGHT.
TUE
N WINDS 5 TO 10 KT, BECOMING E IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
TUE NIGHT
S WINDS 10 TO 15 KT. WAVES 1 FOOT OR LESS.
WED AND WED NIGHT
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
THU THROUGH FRI NIGHT
E 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.
ANZ236-210600-
NARRAGANSETT BAY-
105 PM EDT MON APR 20 2026
THIS AFTERNOON
W WINDS 5 TO 10 KT. WAVES AROUND 2 FT. A SLIGHT
CHANCE OF RAIN.
TONIGHT
N WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
TUE
N WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. WAVES
AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS, THEN
AROUND 2 FT AFTER MIDNIGHT.
WED
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES AROUND 2 FT. A CHANCE OF SHOWERS.
WED NIGHT
SE WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT.
WAVES AROUND 2 FT.
THU THROUGH FRI NIGHT
SE WINDS 5 TO 10 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.
ANZ280-210600-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
105 PM EDT MON APR 20 2026
THIS AFTERNOON
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: NW 2 FT AT 4 SECONDS AND E 2 FT AT 8 SECONDS.
TONIGHT
NW WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT WITH GUSTS
UP TO 20 KT AFTER MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: N 3 FT
AT 5 SECONDS AND E 2 FT AT 8 SECONDS.
TUE
NE WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT IN THE
AFTERNOON. SEAS 2 TO 4 FT. WAVE DETAIL: N 3 FT AT 5 SECONDS AND E
2 FT AT 8 SECONDS.
TUE NIGHT
SE WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 6 SECONDS AND E 2 FT AT
8 SECONDS.
WED AND WED NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS AND E 2 FT AT
9 SECONDS.
THU THROUGH FRI NIGHT
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
WAVE DETAIL: N 2 FT AT 4 SECONDS AND S 2 FT AT 5 SECONDS.
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.
ANZ281-210600-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
105 PM EDT MON APR 20 2026
THIS AFTERNOON
W WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: N 3 FT AT 7 SECONDS AND S 2 FT AT 7 SECONDS.
TONIGHT
SW WINDS AROUND 5 KT, BECOMING N 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: N
3 FT AT 5 SECONDS AND S 2 FT AT 7 SECONDS.
TUE
NE WINDS 10 TO 15 KT, BECOMING N 5 TO 10 KT IN THE
AFTERNOON. SEAS AROUND 3 FT. WAVE DETAIL: N 3 FT AT 5 SECONDS AND
E 2 FT AT 8 SECONDS.
TUE NIGHT
NE WINDS AROUND 5 KT, BECOMING SW AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT AT 5 SECONDS AND E 2 FT AT
8 SECONDS.
WED AND WED NIGHT
SE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: S 3 FT AT 5 SECONDS AND E 3 FT AT 9 SECONDS.
THU THROUGH FRI NIGHT
NW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT.
WAVE DETAIL: SW 3 FT AT 7 SECONDS AND E 3 FT AT 8 SECONDS.
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.
ANZ282-210600-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
105 PM EDT MON APR 20 2026
THIS AFTERNOON
W WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: SW 2 FT AT 6 SECONDS AND E 2 FT AT 7 SECONDS.
TONIGHT
W WINDS 5 TO 10 KT, BECOMING N 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: NW 2 FT AT 4 SECONDS AND
NE 2 FT AT 7 SECONDS. A CHANCE OF RAIN IN THE EVENING.
TUE
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE MORNING.
SEAS 2 TO 4 FT. WAVE DETAIL: N 3 FT AT 5 SECONDS AND E 2 FT AT
8 SECONDS.
TUE NIGHT
N WINDS AROUND 5 KT, BECOMING SW AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: NE 2 FT AT 5 SECONDS AND E 2 FT AT
8 SECONDS.
WED
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
SEAS 2 TO 4 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND N 2 FT AT
5 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
WED NIGHT
SE WINDS 10 TO 15 KT, BECOMING E AFTER MIDNIGHT.
SEAS 4 TO 5 FT. WAVE DETAIL: SW 4 FT AT 6 SECONDS AND E 3 FT AT
9 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
THU AND THU NIGHT
N WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
FRI AND FRI NIGHT
N WINDS 5 TO 10 KT, BECOMING NE. 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.
ANZ283-210600-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
105 PM EDT MON APR 20 2026
THIS AFTERNOON
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: NE 2 FT AT 7 SECONDS AND S 2 FT AT 7 SECONDS. A SLIGHT
CHANCE OF RAIN.
TONIGHT
NW WINDS 10 TO 15 KT, BECOMING N 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: NW 3 FT AT 4 SECONDS AND
NE 3 FT AT 7 SECONDS.
TUE
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, DIMINISHING TO
5 TO 10 KT IN THE AFTERNOON. SEAS 2 TO 4 FT. WAVE DETAIL: N 3 FT
AT 5 SECONDS AND E 2 FT AT 8 SECONDS.
TUE NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N
2 FT AT 4 SECONDS AND SW 2 FT AT 5 SECONDS.
WED
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: W 4 FT AT 5 SECONDS AND E 2 FT AT 8 SECONDS. A
CHANCE OF SHOWERS.
WED NIGHT
SE WINDS 10 TO 15 KT, BECOMING E AFTER MIDNIGHT.
SEAS 4 TO 5 FT. WAVE DETAIL: W 4 FT AT 5 SECONDS AND E 3 FT AT
10 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
THU AND THU NIGHT
NW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
FRI AND FRI NIGHT
NW WINDS 5 TO 10 KT, BECOMING SE. 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.
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