373
FZUS51 KBOX 210505
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
105 AM EDT SUN JUN 21 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-211800-
105 AM EDT SUN JUN 21 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
BREEZY CONDITIONS AND ELEVATED SEAS CONTINUE TODAY ACROSS THE
COASTAL WATERS. ANOTHER COASTAL SYSTEM APPROACHES FROM THE W MON
NIGHT INTO TUE.
ANZ250-211800-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
105 AM EDT SUN JUN 21 2026
REST OF TONIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: NW 2 FT AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS.
SUN
W WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 10 SECONDS AND W 1 FOOT AT
3 SECONDS.
SUN NIGHT
SW WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL:
W 1 FOOT AT 2 SECONDS AND E 1 FOOT AT 3 SECONDS.
MON
W WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: NE 1 FOOT AT 2 SECONDS AND NW 1 FOOT AT
2 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
MON NIGHT
SE WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 4 FT. WAVE DETAIL: SE 3 FT AT 4 SECONDS AND SW 1 FOOT AT
3 SECONDS. SHOWERS.
TUE
S WINDS 10 TO 15 KT, BECOMING N IN THE AFTERNOON. GUSTS UP
TO 25 KT. SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT AT 6 SECONDS.
SHOWERS LIKELY IN THE MORNING. A CHANCE OF SHOWERS IN THE
AFTERNOON.
TUE NIGHT
NW WINDS AROUND 5 KT. SEAS 2 TO 3 FT.
WED THROUGH THU NIGHT
S 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.
ANZ251-211800-
MASSACHUSETTS BAY AND IPSWICH BAY-
105 AM EDT SUN JUN 21 2026
REST OF TONIGHT
W WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: W 1 FOOT AT 3 SECONDS AND N 1 FOOT AT 4 SECONDS.
SUN
W WINDS 5 TO 10 KT, BECOMING SE IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: W 1 FOOT AT 3 SECONDS AND N 1 FOOT
AT 4 SECONDS.
SUN NIGHT
S WINDS AROUND 5 KT, BECOMING W AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: SW 1 FOOT AT 2 SECONDS AND SE 1 FOOT
AT 2 SECONDS.
MON
W WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
1 FOOT OR LESS, THEN 2 TO 3 FT IN THE AFTERNOON. WAVE DETAIL: W
1 FOOT AT 2 SECONDS AND E 1 FOOT AT 2 SECONDS, BECOMING W 1 FOOT
AT 2 SECONDS AND SE 1 FOOT AT 3 SECONDS. A CHANCE OF SHOWERS IN
THE AFTERNOON.
MON NIGHT
SE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND SE 2 FT AT
8 SECONDS. SHOWERS. A CHANCE OF TSTMS AFTER MIDNIGHT.
TUE
E 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: S 3 FT
AT 6 SECONDS. SHOWERS LIKELY IN THE MORNING. A CHANCE OF SHOWERS
IN THE AFTERNOON.
TUE NIGHT
NW WINDS AROUND 5 KT. SEAS AROUND 2 FT.
WED THROUGH THU
S WINDS 10 TO 15 KT. SEAS AROUND 2 FT.
THU NIGHT
S WINDS 10 TO 15 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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-
105 AM EDT SUN JUN 21 2026
REST OF TONIGHT
W WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: N 1 FOOT AT 4 SECONDS AND SE 1 FOOT AT 10 SECONDS.
SUN
W WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. SEAS
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON. WAVE DETAIL: N
1 FOOT AT 4 SECONDS AND S 1 FOOT AT 9 SECONDS, BECOMING W 1 FOOT
AT 3 SECONDS AND N 1 FOOT AT 4 SECONDS.
SUN NIGHT
SW WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. SEAS
AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR LESS. WAVE DETAIL: SW
1 FOOT AT 3 SECONDS AND E 1 FOOT AT 4 SECONDS, BECOMING W 1 FOOT
AT 3 SECONDS AND E 1 FOOT AT 3 SECONDS.
MON
W WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
1 FOOT OR LESS, THEN 2 TO 3 FT IN THE AFTERNOON. WAVE DETAIL: W
1 FOOT AT 3 SECONDS AND NE 1 FOOT AT 4 SECONDS, BECOMING SW
1 FOOT AT 3 SECONDS AND SE 1 FOOT AT 3 SECONDS. A CHANCE OF
SHOWERS IN THE AFTERNOON.
MON NIGHT
SE WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT
AT 6 SECONDS AND S 2 FT AT 3 SECONDS. SHOWERS.
TUE
SW WINDS 10 TO 15 KT, BECOMING NW IN THE AFTERNOON. GUSTS
UP TO 25 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS.
SHOWERS.
TUE NIGHT
NW WINDS AROUND 5 KT. SEAS AROUND 2 FT.
WED THROUGH THU 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.
ANZ254-211800-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
105 AM EDT SUN JUN 21 2026
REST OF TONIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: S 3 FT AT 9 SECONDS AND SE 2 FT AT 11 SECONDS.
SUN
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT AT 9 SECONDS AND SE 2 FT AT
12 SECONDS.
SUN NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
3 FT AT 8 SECONDS AND NW 1 FOOT AT 4 SECONDS.
MON
W WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS AND W 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
MON NIGHT
SE WINDS 10 TO 15 KT, BECOMING S 15 TO 20 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 4 TO 6 FT. WAVE DETAIL: SE 5 FT
AT 7 SECONDS AND SW 1 FOOT AT 3 SECONDS. A CHANCE OF SHOWERS IN
THE EVENING, THEN SHOWERS AFTER MIDNIGHT.
TUE
S WINDS 15 TO 20 KT, BECOMING W IN THE AFTERNOON. GUSTS UP
TO 25 KT. SEAS 4 TO 6 FT. WAVE DETAIL: SW 5 FT AT 5 SECONDS AND
SE 3 FT AT 7 SECONDS. SHOWERS.
TUE NIGHT
NW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. A CHANCE OF
SHOWERS IN THE EVENING.
WED THROUGH THU NIGHT
S 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.
ANZ255-211800-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
105 AM EDT SUN JUN 21 2026
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EDT EARLY THIS
MORNING...
REST OF TONIGHT
W WINDS AROUND 10 KT. SEAS 3 TO 5 FT. WAVE
DETAIL: SW 5 FT AT 7 SECONDS AND E 1 FOOT AT 12 SECONDS.
SUN
SW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: W 4 FT
AT 6 SECONDS AND SE 1 FOOT AT 12 SECONDS.
SUN NIGHT
SW WINDS 10 TO 15 KT, BECOMING W 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND
SW 3 FT AT 8 SECONDS.
MON
SW WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS AND W 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
MON NIGHT
SE WINDS 15 TO 20 KT, BECOMING S 20 TO 25 KT AFTER
MIDNIGHT. GUSTS UP TO 30 KT. SEAS 5 TO 7 FT. WAVE DETAIL: SW 6 FT
AT 7 SECONDS AND SE 3 FT AT 6 SECONDS. A CHANCE OF SHOWERS IN THE
EVENING, THEN SHOWERS AFTER MIDNIGHT.
TUE
SW WINDS 20 TO 25 KT, BECOMING W 15 TO 20 KT IN THE
AFTERNOON. SEAS 4 TO 6 FT. WAVE DETAIL: SW 6 FT AT 7 SECONDS AND
SE 1 FOOT AT 8 SECONDS. SHOWERS WITH A CHANCE OF TSTMS.
TUE NIGHT
NW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. A CHANCE OF
SHOWERS IN THE EVENING.
WED THROUGH THU NIGHT
SE WINDS 5 TO 10 KT. SEAS 2 TO 4 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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-
105 AM EDT SUN JUN 21 2026
REST OF TONIGHT
W WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: S 4 FT AT 8 SECONDS AND W 1 FOOT AT 5 SECONDS.
SUN
W WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT IN THE
AFTERNOON. SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT AT 8 SECONDS AND
SW 2 FT AT 3 SECONDS.
SUN NIGHT
SW WINDS 10 TO 15 KT, BECOMING W 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: W 3 FT AT 4 SECONDS AND SW
3 FT AT 8 SECONDS.
MON
SW WINDS AROUND 5 KT, BECOMING SE IN THE AFTERNOON. SEAS
2 TO 4 FT. WAVE DETAIL: SW 2 FT AT 6 SECONDS AND E 1 FOOT AT
9 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
MON NIGHT
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
5 TO 7 FT. WAVE DETAIL: S 6 FT AT 7 SECONDS. SHOWERS. A CHANCE OF
TSTMS AFTER MIDNIGHT.
TUE
SW WINDS 15 TO 20 KT, BECOMING W 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 4 TO 6 FT. WAVE DETAIL: SW
6 FT AT 7 SECONDS AND SE 2 FT AT 9 SECONDS. SHOWERS WITH A CHANCE
OF TSTMS IN THE MORNING, THEN A CHANCE OF SHOWERS IN THE
AFTERNOON.
TUE NIGHT
NW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
WED THROUGH THU NIGHT
S WINDS 5 TO 10 KT. SEAS 2 TO 4 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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-
105 AM EDT SUN JUN 21 2026
REST OF TONIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: E 1 FOOT AT 4 SECONDS AND W 1 FOOT AT 4 SECONDS.
SUN
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS AND NE 2 FT
AT 4 SECONDS.
SUN NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 2 FT AT 3 SECONDS AND S 1 FOOT AT 8 SECONDS.
MON
W WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: W 1 FOOT AT 4 SECONDS AND S 1 FOOT AT
7 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
MON NIGHT
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND E 1 FOOT AT
12 SECONDS. SHOWERS.
TUE
SW WINDS 15 TO 20 KT, BECOMING W 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 3 TO 5 FT, SUBSIDING TO 2 TO
3 FT IN THE AFTERNOON. WAVE DETAIL: S 4 FT AT 6 SECONDS, BECOMING
W 2 FT AT 4 SECONDS AND S 2 FT AT 7 SECONDS. SHOWERS WITH A
CHANCE OF TSTMS.
TUE NIGHT
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS AND TSTMS IN THE EVENING.
WED THROUGH THU NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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-
105 AM EDT SUN JUN 21 2026
REST OF TONIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SW 3 FT AT 8 SECONDS AND W 1 FOOT AT 8 SECONDS.
SUN
W WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT
AT 4 SECONDS AND SW 3 FT AT 8 SECONDS.
SUN NIGHT
SW WINDS 10 TO 15 KT, BECOMING W AROUND 5 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND
SW 2 FT AT 8 SECONDS.
MON
W WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 1 FOOT AT 7 SECONDS. A CHANCE OF
SHOWERS IN THE AFTERNOON.
MON NIGHT
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT. WAVE DETAIL: SW 4 FT AT 6 SECONDS AND SE 2 FT AT
3 SECONDS. SHOWERS. A CHANCE OF TSTMS AFTER MIDNIGHT.
TUE
SW WINDS 15 TO 20 KT, BECOMING NW 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 3 TO 5 FT, SUBSIDING TO 2 TO
3 FT IN THE AFTERNOON. WAVE DETAIL: S 4 FT AT 6 SECONDS, BECOMING
W 3 FT AT 6 SECONDS AND SE 3 FT AT 7 SECONDS. SHOWERS WITH A
CHANCE OF TSTMS.
TUE NIGHT
N WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
2 TO 3 FT.
WED THROUGH THU NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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-
105 AM EDT SUN JUN 21 2026
REST OF TONIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SW 2 FT AT 7 SECONDS AND SE 1 FOOT AT 10 SECONDS.
SUN
W WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT
AT 4 SECONDS AND SW 2 FT AT 8 SECONDS.
SUN NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
DIMINISHING TO AROUND 5 KT AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE
DETAIL: SW 2 FT AT 4 SECONDS AND NE 1 FOOT AT 8 SECONDS.
MON
W WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
1 FOOT OR LESS, THEN 2 TO 3 FT IN THE AFTERNOON. WAVE DETAIL: S
1 FOOT AT 6 SECONDS, BECOMING S 1 FOOT AT 5 SECONDS. A CHANCE OF
SHOWERS IN THE AFTERNOON.
MON NIGHT
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 4 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS. SHOWERS. A CHANCE OF
TSTMS AFTER MIDNIGHT.
TUE
SW WINDS 15 TO 20 KT, BECOMING NW 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT
AT 6 SECONDS. SHOWERS WITH A CHANCE OF TSTMS.
TUE NIGHT
N WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
AROUND 2 FT.
WED THROUGH THU NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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-
105 AM EDT SUN JUN 21 2026
REST OF TONIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 3 FT AT 8 SECONDS AND SE 2 FT AT 10 SECONDS.
SUN
W WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT
AT 4 SECONDS AND S 3 FT AT 8 SECONDS.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING W 5 TO 10 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE
DETAIL: SW 3 FT AT 4 SECONDS AND S 3 FT AT 8 SECONDS.
MON
SW WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 6 SECONDS AND S 1 FOOT AT
9 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
MON NIGHT
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
4 TO 6 FT. WAVE DETAIL: S 5 FT AT 7 SECONDS. SHOWERS. A CHANCE OF
TSTMS AFTER MIDNIGHT.
TUE
SW WINDS 15 TO 20 KT, BECOMING NW 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S 5 FT
AT 7 SECONDS. SHOWERS LIKELY WITH A CHANCE OF TSTMS IN THE
MORNING, THEN A CHANCE OF SHOWERS IN THE AFTERNOON.
TUE NIGHT
NW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT.
WED THROUGH THU NIGHT
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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-
105 AM EDT SUN JUN 21 2026
REST OF TONIGHT
W WINDS AROUND 5 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 3 FT AT 8 SECONDS AND W 1 FOOT AT 3 SECONDS.
SUN
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT
8 SECONDS AND SW 2 FT AT 3 SECONDS.
SUN NIGHT
SW WINDS 10 TO 15 KT, BECOMING W AROUND 5 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 8 SECONDS AND W
1 FOOT AT 3 SECONDS.
MON
S WINDS AROUND 5 KT, BECOMING SE IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS AND SW 1 FOOT AT
2 SECONDS. SHOWERS LIKELY IN THE AFTERNOON.
MON NIGHT
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
4 TO 6 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS. SHOWERS. A CHANCE OF
TSTMS AFTER MIDNIGHT.
TUE
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING NW
5 TO 10 KT IN THE AFTERNOON. SEAS 3 TO 5 FT. WAVE DETAIL: SW 4 FT
AT 6 SECONDS AND SE 2 FT AT 7 SECONDS. SHOWERS IN THE MORNING. A
CHANCE OF SHOWERS IN THE AFTERNOON.
TUE NIGHT
NW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT.
WED THROUGH THU NIGHT
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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-
105 AM EDT SUN JUN 21 2026
REST OF TONIGHT
W WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
SUN
W WINDS 5 TO 10 KT, BECOMING E IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
SUN NIGHT
S WINDS AROUND 5 KT, BECOMING W AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS.
MON
W WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. WAVES
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON. A CHANCE OF
SHOWERS IN THE AFTERNOON.
MON NIGHT
SE WINDS 10 TO 15 KT. WAVES 2 TO 3 FT. SHOWERS.
TUE
N WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT IN THE
AFTERNOON. WAVES AROUND 2 FT IN THE MORNING, THEN 1 FOOT OR LESS.
SHOWERS IN THE MORNING. A CHANCE OF SHOWERS IN THE AFTERNOON.
TUE NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FOOT OR LESS.
WED THROUGH THU
S WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
THU NIGHT
S WINDS 5 TO 10 KT. 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.
ANZ236-211800-
NARRAGANSETT BAY-
105 AM EDT SUN JUN 21 2026
REST OF TONIGHT
W WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
SUN
W WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. WAVES AROUND 2 FT.
SUN NIGHT
W WINDS 10 TO 15 KT, BECOMING NW AROUND 5 KT AFTER
MIDNIGHT. WAVES AROUND 2 FT.
MON
SW WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. WAVES
2 TO 3 FT. SHOWERS LIKELY IN THE AFTERNOON.
MON NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES
2 TO 4 FT. SHOWERS. A CHANCE OF TSTMS AFTER MIDNIGHT.
TUE
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING NW
IN THE AFTERNOON. WAVES 2 TO 3 FT. SHOWERS IN THE MORNING. A
CHANCE OF SHOWERS IN THE AFTERNOON.
TUE NIGHT
NW WINDS 5 TO 10 KT. WAVES 2 TO 3 FT.
WED THROUGH THU NIGHT
S WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
WINDS AND WAVES HIGHER IN AND NEAR TSTMS.
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.
ANZ280-211800-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
105 AM EDT SUN JUN 21 2026
REST OF TONIGHT
W WINDS AROUND 10 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: S 3 FT AT 9 SECONDS AND NW 2 FT AT 4 SECONDS.
SUN
W WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 9 SECONDS AND N 1 FOOT AT
3 SECONDS.
SUN NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
2 FT AT 8 SECONDS AND W 1 FOOT AT 3 SECONDS.
MON
W WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 8 SECONDS AND N 1 FOOT AT
2 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
MON NIGHT
S WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT,
BECOMING SE 15 TO 20 KT WITH GUSTS UP TO 30 KT AFTER MIDNIGHT.
SEAS 2 TO 4 FT, BUILDING TO 4 TO 6 FT AFTER MIDNIGHT. WAVE
DETAIL: SW 2 FT AT 3 SECONDS AND S 2 FT AT 7 SECONDS, BECOMING S
4 FT AT 6 SECONDS AND SW 1 FOOT AT 3 SECONDS. SHOWERS.
TUE
S WINDS 15 TO 20 KT, BECOMING NW 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 30 KT. SEAS 4 TO 6 FT. WAVE DETAIL: S 5 FT
AT 6 SECONDS. SHOWERS LIKELY IN THE MORNING. A CHANCE OF SHOWERS
IN THE AFTERNOON.
TUE NIGHT
NW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
WED THROUGH THU NIGHT
S 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.
ANZ281-211800-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
105 AM EDT SUN JUN 21 2026
REST OF TONIGHT
W WINDS 5 TO 10 KT. SEAS 4 TO 6 FT. WAVE
DETAIL: S 5 FT AT 9 SECONDS AND N 2 FT AT 4 SECONDS.
SUN
SW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S 4 FT
AT 9 SECONDS AND N 1 FOOT AT 4 SECONDS.
SUN NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: S
3 FT AT 8 SECONDS AND NW 1 FOOT AT 4 SECONDS.
MON
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT
AT 7 SECONDS AND NW 1 FOOT AT 3 SECONDS.
MON NIGHT
SE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING S 15 TO 20 KT WITH GUSTS UP TO 30 KT AFTER MIDNIGHT.
SEAS 3 TO 5 FT, BUILDING TO 5 TO 7 FT AFTER MIDNIGHT. WAVE
DETAIL: S 2 FT AT 7 SECONDS AND SE 2 FT AT 8 SECONDS, BECOMING S
5 FT AT 7 SECONDS AND SE 3 FT AT 8 SECONDS. A CHANCE OF SHOWERS
IN THE EVENING, THEN SHOWERS AFTER MIDNIGHT.
TUE
S WINDS 15 TO 20 KT, BECOMING SW IN THE AFTERNOON. GUSTS
UP TO 30 KT. SEAS 5 TO 7 FT. WAVE DETAIL: SW 6 FT AT 6 SECONDS
AND E 2 FT AT 8 SECONDS. SHOWERS WITH A CHANCE OF TSTMS.
TUE NIGHT
NW WINDS 5 TO 10 KT. SEAS 4 TO 6 FT. A CHANCE OF
SHOWERS IN THE EVENING.
WED THROUGH THU NIGHT
SE WINDS 5 TO 10 KT. SEAS 3 TO 4 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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.
ANZ282-211800-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
105 AM EDT SUN JUN 21 2026
REST OF TONIGHT
W WINDS 5 TO 10 KT. SEAS 4 TO 6 FT. WAVE
DETAIL: S 5 FT AT 9 SECONDS AND W 3 FT AT 6 SECONDS.
SUN
SW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SW 4 FT
AT 7 SECONDS AND SE 2 FT AT 4 SECONDS.
SUN NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 3 FT. WAVE DETAIL:
SW 3 FT AT 8 SECONDS AND W 2 FT AT 4 SECONDS.
MON
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT
AT 7 SECONDS AND SE 1 FOOT AT 4 SECONDS.
MON NIGHT
S WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
4 TO 6 FT. WAVE DETAIL: S 5 FT AT 7 SECONDS AND E 1 FOOT AT
12 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS
LIKELY AFTER MIDNIGHT.
TUE
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO
7 FT. WAVE DETAIL: S 6 FT AT 7 SECONDS AND SW 2 FT AT 3 SECONDS.
SHOWERS WITH A CHANCE OF TSTMS.
TUE NIGHT
NW WINDS 5 TO 10 KT. SEAS 4 TO 6 FT. A CHANCE OF
SHOWERS. A CHANCE OF TSTMS IN THE EVENING.
WED THROUGH THU NIGHT
SE WINDS 5 TO 10 KT. SEAS 3 TO 4 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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.
ANZ283-211800-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
105 AM EDT SUN JUN 21 2026
REST OF TONIGHT
W WINDS 5 TO 10 KT. SEAS 4 TO 5 FT. WAVE
DETAIL: S 4 FT AT 9 SECONDS AND W 2 FT AT 6 SECONDS.
SUN
W WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SW 4 FT
AT 8 SECONDS AND W 2 FT AT 5 SECONDS.
SUN NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
3 FT AT 9 SECONDS AND SW 2 FT AT 4 SECONDS.
MON
SW WINDS AROUND 5 KT, BECOMING S 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS 2 TO 4 FT. WAVE DETAIL: SW 2 FT
AT 7 SECONDS AND W 1 FOOT AT 4 SECONDS. A CHANCE OF SHOWERS IN
THE AFTERNOON.
MON NIGHT
S WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS
4 TO 6 FT. WAVE DETAIL: S 6 FT AT 7 SECONDS AND NW 4 FT AT
9 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS AFTER
MIDNIGHT.
TUE
SW WINDS 15 TO 20 KT, BECOMING W 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 5 TO 6 FT. WAVE DETAIL: S 6 FT
AT 7 SECONDS AND SW 3 FT AT 3 SECONDS. A CHANCE OF TSTMS. SHOWERS
LIKELY IN THE MORNING, THEN A CHANCE OF SHOWERS IN THE AFTERNOON.
TUE NIGHT
NW WINDS 5 TO 10 KT. SEAS 4 TO 5 FT. A CHANCE OF
SHOWERS IN THE EVENING.
WED THROUGH THU NIGHT
SE WINDS 5 TO 10 KT. SEAS 3 TO 4 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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