987
FZUS51 KBOX 211404
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1004 AM EDT FRI AUG 21 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-220300-
1004 AM EDT FRI AUG 21 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
WEAK LOW PRES TRACKS THROUGH THE EASTERN WATERS TOWARDS BUZZARD'S
BAY INTO FRI. NE WINDS AND SHOWERS CONTINUE INTO FRIDAY THOUGH
LIKELY REMAINING BELOW SCA CONDITIONS FOR THE MAJORITY OF THE
WATERS. UNSETTLED CONDITIONS CONTINUE OVER THE WEEKEND WITH A
STALLED FRONT POSSIBLE OVER THE WATERS. HIGH PRES MOVES IN EARLY
NEXT WEEK.
ANZ250-220300-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
1004 AM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: N 3 FT AT 4 SECONDS AND E 2 FT AT
8 SECONDS. A CHANCE OF SHOWERS.
TONIGHT
NE 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. A CHANCE OF SHOWERS. PATCHY FOG IN THE
EVENING.
SAT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE MORNING.
SEAS 2 TO 4 FT. WAVE DETAIL: NE 3 FT AT 5 SECONDS AND E 2 FT AT
8 SECONDS. A CHANCE OF SHOWERS. PATCHY FOG IN THE AFTERNOON.
SAT NIGHT
NE WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT AT 5 SECONDS AND SW 1 FOOT AT
5 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS
LIKELY AFTER MIDNIGHT. PATCHY FOG IN THE EVENING.
SUN
SE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E 2 FT
AT 6 SECONDS AND SW 1 FOOT AT 4 SECONDS. SHOWERS LIKELY, MAINLY
IN THE MORNING.
SUN NIGHT
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
3 FT AT 7 SECONDS AND S 1 FOOT AT 3 SECONDS.
MON THROUGH TUE NIGHT
W 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.
ANZ251-220300-
MASSACHUSETTS BAY AND IPSWICH BAY-
1004 AM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT AT 5 SECONDS AND E 2 FT AT
8 SECONDS. A CHANCE OF SHOWERS.
TONIGHT
NE WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N
3 FT AT 4 SECONDS AND E 2 FT AT 8 SECONDS. A CHANCE OF SHOWERS
AFTER MIDNIGHT.
SAT
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: NE 3 FT AT 5 SECONDS AND E 1 FOOT AT
8 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM IN THE
AFTERNOON.
SAT NIGHT
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 2 FT AT 5 SECONDS AND SW 1 FOOT AT 5 SECONDS. A CHANCE OF
SHOWERS IN THE EVENING, THEN SHOWERS LIKELY AFTER MIDNIGHT.
PATCHY FOG IN THE EVENING WITH VSBY 1 TO 3 NM.
SUN
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
2 FT AT 5 SECONDS AND E 1 FOOT AT 8 SECONDS. SHOWERS LIKELY,
MAINLY IN THE MORNING.
SUN NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: E
2 FT AT 7 SECONDS AND S 1 FOOT AT 3 SECONDS.
MON THROUGH TUE 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.
ANZ231-220300-
CAPE COD BAY-
1004 AM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT AT 3 SECONDS AND E 1 FOOT
AT 8 SECONDS. SHOWERS LIKELY. PATCHY FOG.
TONIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT AT 4 SECONDS AND
E 2 FT AT 8 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS.
SAT
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, DIMINISHING
TO 5 TO 10 KT IN THE AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: N
2 FT AT 4 SECONDS AND E 1 FOOT AT 8 SECONDS. PATCHY FOG. A CHANCE
OF SHOWERS.
SAT NIGHT
N WINDS AROUND 5 KT, BECOMING SE AROUND 5 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 4 SECONDS
AND SE 1 FOOT AT 8 SECONDS. A CHANCE OF SHOWERS IN THE EVENING,
THEN SHOWERS LIKELY AFTER MIDNIGHT. PATCHY FOG IN THE EVENING
WITH VSBY 1 TO 3 NM.
SUN
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: N
1 FOOT AT 4 SECONDS AND E 1 FOOT AT 8 SECONDS. SHOWERS LIKELY,
MAINLY IN THE MORNING.
SUN NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
S 1 FOOT AT 2 SECONDS AND NE 1 FOOT AT 5 SECONDS.
MON THROUGH TUE NIGHT
W WINDS 5 TO 10 KT WITH GUSTS UP TO
20 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.
ANZ254-220300-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
1004 AM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: E 3 FT AT 4 SECONDS AND E 2 FT AT 8 SECONDS. PATCHY FOG.
SHOWERS LIKELY. ISOLATED TSTMS. VSBY 1 TO 3 NM.
TONIGHT
NE WINDS 15 TO 20 KT. SEAS 3 TO 4 FT. WAVE DETAIL: NE
4 FT AT 5 SECONDS AND E 2 FT AT 8 SECONDS. PATCHY FOG. A CHANCE
OF SHOWERS. VSBY 1 TO 3 NM IN THE EVENING.
SAT
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING SE
5 TO 10 KT IN THE AFTERNOON. SEAS 2 TO 4 FT. WAVE DETAIL: NE 3 FT
AT 5 SECONDS AND S 1 FOOT AT 5 SECONDS. PATCHY FOG. A CHANCE OF
SHOWERS IN THE MORNING.
SAT NIGHT
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
2 FT AT 5 SECONDS AND S 1 FOOT AT 5 SECONDS. SHOWERS. PATCHY FOG
IN THE EVENING WITH VSBY 1 TO 3 NM.
SUN
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT
AT 5 SECONDS AND SE 1 FOOT AT 12 SECONDS. SHOWERS LIKELY, MAINLY
IN THE MORNING.
SUN NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE
4 FT AT 7 SECONDS AND SW 1 FOOT AT 3 SECONDS. A CHANCE OF
SHOWERS.
MON
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. A CHANCE OF SHOWERS.
MON NIGHT THROUGH TUE NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 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.
ANZ255-220300-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
1004 AM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: NE 3 FT AT 5 SECONDS AND SE 2 FT AT
8 SECONDS. PATCHY FOG. SHOWERS. ISOLATED TSTMS. VSBY 1 TO 3 NM.
TONIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
3 FT. WAVE DETAIL: NE 3 FT AT 5 SECONDS AND SW 1 FOOT AT
5 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM IN THE
EVENING.
SAT
NE WINDS 10 TO 15 KT, BECOMING SW 5 TO 10 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: NE 3 FT AT 5 SECONDS AND
SW 1 FOOT AT 5 SECONDS. PATCHY FOG.
SAT NIGHT
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NE
2 FT AT 5 SECONDS AND SW 1 FOOT AT 4 SECONDS. SHOWERS. PATCHY FOG
IN THE EVENING WITH VSBY 1 TO 3 NM.
SUN
S WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT
AT 6 SECONDS AND E 1 FOOT AT 5 SECONDS. SHOWERS, MAINLY IN THE
MORNING.
SUN NIGHT
SW WINDS AROUND 10 KT. SEAS 4 TO 6 FT. WAVE DETAIL:
S 4 FT AT 7 SECONDS AND NE 1 FOOT AT 4 SECONDS. A CHANCE OF
SHOWERS.
MON
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 4 TO
6 FT. A CHANCE OF SHOWERS.
MON NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
3 TO 5 FT.
TUE AND TUE NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 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.
ANZ256-220300-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
1004 AM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 20 TO 25 KT. SEAS AROUND 3 FT. WAVE
DETAIL: NE 3 FT AT 5 SECONDS AND SE 2 FT AT 9 SECONDS. SHOWERS
LIKELY.
TONIGHT
NE WINDS 15 TO 20 KT, BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS AROUND 3 FT. WAVE DETAIL: NE
3 FT AT 5 SECONDS AND SW 1 FOOT AT 6 SECONDS. PATCHY FOG.
SAT
N WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: NE 3 FT AT 5 SECONDS AND
SW 1 FOOT AT 5 SECONDS. PATCHY FOG.
SAT NIGHT
SE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
2 FT AT 5 SECONDS AND SE 2 FT AT 8 SECONDS. SHOWERS. PATCHY FOG
IN THE EVENING.
SUN
S WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT
AT 6 SECONDS AND E 1 FOOT AT 6 SECONDS. SHOWERS LIKELY, MAINLY IN
THE MORNING.
SUN NIGHT
SW WINDS AROUND 10 KT. SEAS 4 TO 6 FT. WAVE DETAIL:
SW 4 FT AT 6 SECONDS AND E 2 FT AT 8 SECONDS.
MON
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 4 TO
6 FT.
MON NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
3 TO 5 FT.
TUE AND TUE NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP 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.
ANZ232-220300-
NANTUCKET SOUND-
1004 AM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: E 3 FT AT 4 SECONDS AND W 1 FOOT AT 5 SECONDS. PATCHY
FOG. SHOWERS LIKELY. ISOLATED TSTMS. VSBY 1 TO 3 NM.
TONIGHT
NE WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: NE 3 FT AT 4 SECONDS AND
SW 1 FOOT AT 5 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS. VSBY
1 TO 3 NM IN THE EVENING.
SAT
NE 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 5 SECONDS AND SW 1 FOOT AT 5 SECONDS. PATCHY FOG. A
CHANCE OF SHOWERS IN THE MORNING.
SAT NIGHT
SW WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 1 FOOT AT 2 SECONDS AND E
1 FOOT AT 5 SECONDS. SHOWERS. PATCHY FOG IN THE EVENING WITH VSBY
1 TO 3 NM.
SUN
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S
1 FOOT AT 3 SECONDS AND E 1 FOOT AT 6 SECONDS. SHOWERS LIKELY,
MAINLY IN THE MORNING.
SUN NIGHT
SW WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL:
SW 2 FT AT 3 SECONDS AND E 2 FT AT 6 SECONDS. A CHANCE OF
SHOWERS.
MON
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. A CHANCE OF SHOWERS.
MON NIGHT THROUGH TUE NIGHT
W WINDS 15 TO 20 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.
ANZ233-220300-
VINEYARD SOUND-
1004 AM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: NE 2 FT AT 3 SECONDS AND W 1 FOOT AT
6 SECONDS. PATCHY FOG. SHOWERS LIKELY. ISOLATED TSTMS.
TONIGHT
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 S 1 FOOT AT
7 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM IN THE
EVENING.
SAT
NE WINDS 10 TO 15 KT, BECOMING N 5 TO 10 KT IN THE
AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: NE 2 FT AT 3 SECONDS
AND S 1 FOOT AT 7 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE
AFTERNOON.
SAT NIGHT
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
NE 1 FOOT AT 3 SECONDS AND W 1 FOOT AT 4 SECONDS. SHOWERS. PATCHY
FOG IN THE EVENING.
SUN
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT
AT 5 SECONDS AND SE 1 FOOT AT 13 SECONDS. SHOWERS LIKELY, MAINLY
IN THE MORNING.
SUN NIGHT
SW WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL:
S 3 FT AT 6 SECONDS AND E 1 FOOT AT 4 SECONDS.
MON THROUGH TUE NIGHT
W WINDS 15 TO 20 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.
ANZ234-220300-
BUZZARDS BAY-
1004 AM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: NE 2 FT AT 3 SECONDS AND W 1 FOOT AT
5 SECONDS. SHOWERS LIKELY. PATCHY FOG.
TONIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 2 TO 3 FT. WAVE DETAIL: NE 2 FT AT 3 SECONDS AND SW
1 FOOT AT 6 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS.
SAT
NE WINDS 10 TO 15 KT, BECOMING N 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 SW 1 FOOT AT 6 SECONDS,
BECOMING NE 1 FOOT AT 3 SECONDS AND W 1 FOOT AT 5 SECONDS. PATCHY
FOG. A CHANCE OF SHOWERS.
SAT NIGHT
N WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: NE 1 FOOT AT 3 SECONDS AND W 1 FOOT
AT 4 SECONDS. SHOWERS. PATCHY FOG IN THE EVENING.
SUN
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT
AT 4 SECONDS AND S 2 FT AT 7 SECONDS. SHOWERS LIKELY, MAINLY IN
THE MORNING.
SUN NIGHT
SW WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL:
S 3 FT AT 5 SECONDS AND NE 1 FOOT AT 4 SECONDS.
MON THROUGH TUE NIGHT
W 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.
ANZ235-220300-
RHODE ISLAND SOUND-
1004 AM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS AROUND 3 FT. WAVE DETAIL: NE 3 FT AT 4 SECONDS AND SE 2 FT
AT 8 SECONDS. SHOWERS LIKELY.
TONIGHT
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 S 1 FOOT AT
7 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS.
SAT
N WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: NE 2 FT AT 4 SECONDS AND
S 1 FOOT AT 7 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE
AFTERNOON.
SAT NIGHT
NE WINDS 5 TO 10 KT, BECOMING E AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 8 SECONDS AND NE 1 FOOT AT
3 SECONDS. SHOWERS. PATCHY FOG IN THE EVENING.
SUN
S WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT
AT 6 SECONDS AND SE 1 FOOT AT 13 SECONDS. SHOWERS LIKELY, MAINLY
IN THE MORNING.
SUN NIGHT
SW WINDS AROUND 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL:
SW 3 FT AT 6 SECONDS AND NE 2 FT AT 7 SECONDS.
MON
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
5 FT.
MON NIGHT THROUGH TUE NIGHT
W 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.
ANZ237-220300-
BLOCK ISLAND SOUND-
1004 AM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: NE 3 FT AT 4 SECONDS AND SW 1 FOOT
AT 5 SECONDS. SHOWERS LIKELY THIS MORNING.
TONIGHT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: NE 3 FT AT 5 SECONDS AND S 1 FOOT AT
7 SECONDS.
SAT
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NE 2 FT
AT 5 SECONDS AND S 1 FOOT AT 5 SECONDS. PATCHY FOG. A CHANCE OF
SHOWERS IN THE AFTERNOON.
SAT NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S
1 FOOT AT 5 SECONDS AND NE 1 FOOT AT 5 SECONDS. SHOWERS. PATCHY
FOG IN THE EVENING.
SUN
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT
AT 8 SECONDS AND S 1 FOOT AT 4 SECONDS. SHOWERS LIKELY, MAINLY IN
THE MORNING.
SUN NIGHT
SW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S
3 FT AT 6 SECONDS AND E 1 FOOT AT 3 SECONDS.
MON
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
5 FT.
MON NIGHT THROUGH TUE NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP
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.
ANZ230-220300-
BOSTON HARBOR-
1004 AM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
WAVES AROUND 2 FT. A CHANCE OF SHOWERS.
TONIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS, THEN AROUND
2 FT AFTER MIDNIGHT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT
NE WINDS 10 TO 15 KT. WAVES AROUND 2 FT. PATCHY FOG. A
CHANCE OF SHOWERS. VSBY 1 TO 3 NM IN THE AFTERNOON.
SAT NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS. A CHANCE
OF SHOWERS IN THE EVENING, THEN SHOWERS LIKELY AFTER MIDNIGHT.
PATCHY FOG IN THE EVENING WITH VSBY 1 TO 3 NM.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS. SHOWERS LIKELY,
MAINLY IN THE MORNING.
SUN NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
MON THROUGH TUE NIGHT
W 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.
ANZ236-220300-
NARRAGANSETT BAY-
1004 AM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT.
WAVES 2 TO 3 FT. SHOWERS LIKELY THIS MORNING.
TONIGHT
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES AROUND 2 FT. A CHANCE OF SHOWERS.
SAT
N WINDS 5 TO 10 KT. WAVES AROUND 2 FT. PATCHY FOG IN THE
AFTERNOON. A CHANCE OF SHOWERS IN THE AFTERNOON.
SAT NIGHT
NE WINDS 5 TO 10 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS IN THE EVENING, THEN SHOWERS AFTER MIDNIGHT. PATCHY FOG
IN THE EVENING.
SUN
SE WINDS 5 TO 10 KT, BECOMING S IN THE AFTERNOON. WAVES
AROUND 2 FT. SHOWERS LIKELY, MAINLY IN THE MORNING.
SUN NIGHT
SW WINDS 5 TO 10 KT. WAVES 2 TO 3 FT.
MON THROUGH TUE NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO
20 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.
ANZ280-220300-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
1004 AM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT. SEAS AROUND 3 FT. WAVE
DETAIL: NE 2 FT AT 3 SECONDS AND SE 2 FT AT 8 SECONDS. A CHANCE
OF SHOWERS.
TONIGHT
NE 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 SE
2 FT AT 8 SECONDS. A CHANCE OF SHOWERS.
SAT
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: NE 3 FT AT 4 SECONDS AND E 2 FT AT 8 SECONDS.
A CHANCE OF SHOWERS. PATCHY FOG IN THE AFTERNOON.
SAT NIGHT
SE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
3 FT AT 5 SECONDS AND E 1 FOOT AT 8 SECONDS. A CHANCE OF SHOWERS
IN THE EVENING, THEN SHOWERS LIKELY AFTER MIDNIGHT. PATCHY FOG IN
THE EVENING.
SUN
SE WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS AROUND 3 FT. WAVE DETAIL: SE 3 FT
AT 5 SECONDS AND SE 1 FOOT AT 12 SECONDS. SHOWERS LIKELY, MAINLY
IN THE MORNING.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
3 TO 4 FT. WAVE DETAIL: SE 4 FT AT 7 SECONDS AND E 2 FT AT
8 SECONDS.
MON THROUGH TUE NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP 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.
ANZ281-220300-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
1004 AM EDT FRI AUG 21 2026
THIS AFTERNOON
E 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 E 2 FT AT
8 SECONDS. PATCHY FOG. SHOWERS LIKELY WITH ISOLATED TSTMS. VSBY
1 NM OR LESS.
TONIGHT
NE WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: NE 3 FT AT 4 SECONDS AND
SW 2 FT AT 5 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS. VSBY 1 TO
3 NM IN THE EVENING.
SAT
E WINDS 10 TO 15 KT, BECOMING S 5 TO 10 KT IN THE
AFTERNOON. GUSTS UP TO 20 KT. SEAS 3 TO 4 FT. WAVE DETAIL: NE
3 FT AT 5 SECONDS AND SW 2 FT AT 5 SECONDS. PATCHY FOG. A CHANCE
OF SHOWERS IN THE MORNING.
SAT NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 3 FT. WAVE DETAIL: S
2 FT AT 5 SECONDS AND E 2 FT AT 5 SECONDS. SHOWERS. PATCHY FOG IN
THE EVENING WITH VSBY 1 TO 3 NM.
SUN
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS AND E 1 FOOT AT 6 SECONDS.
SHOWERS, MAINLY IN THE MORNING.
SUN NIGHT
S WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SW
4 FT AT 6 SECONDS AND NE 1 FOOT AT 4 SECONDS. A CHANCE OF
SHOWERS.
MON
SW WINDS AROUND 10 KT. SEAS 4 TO 6 FT. A CHANCE OF
SHOWERS.
MON NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
4 TO 6 FT.
TUE AND TUE NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 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.
ANZ282-220300-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
1004 AM EDT FRI AUG 21 2026
THIS AFTERNOON
E WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT.
SEAS AROUND 3 FT. WAVE DETAIL: NE 3 FT AT 4 SECONDS AND S 2 FT AT
4 SECONDS. PATCHY FOG. SHOWERS LIKELY WITH ISOLATED TSTMS. VSBY
1 TO 3 NM.
TONIGHT
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
N AFTER MIDNIGHT. SEAS AROUND 3 FT. WAVE DETAIL: NE 3 FT AT
5 SECONDS AND SW 2 FT AT 5 SECONDS. PATCHY FOG. A CHANCE OF
SHOWERS IN THE EVENING WITH VSBY 1 TO 3 NM.
SAT
W WINDS 10 TO 15 KT, BECOMING SW 5 TO 10 KT IN THE
AFTERNOON. SEAS AROUND 3 FT. WAVE DETAIL: NE 2 FT AT 5 SECONDS
AND SW 2 FT AT 5 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE
AFTERNOON.
SAT NIGHT
S WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: NE
2 FT AT 5 SECONDS AND E 2 FT AT 8 SECONDS. SHOWERS. PATCHY FOG IN
THE EVENING WITH VSBY 1 TO 3 NM.
SUN
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
5 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS AND E 1 FOOT AT 6 SECONDS.
SHOWERS.
SUN NIGHT
SW WINDS AROUND 10 KT. SEAS 5 TO 7 FT. WAVE DETAIL:
S 5 FT AT 7 SECONDS AND NE 1 FOOT AT 5 SECONDS. A CHANCE OF
SHOWERS.
MON
SW WINDS 5 TO 10 KT. SEAS 5 TO 7 FT. A CHANCE OF SHOWERS.
MON NIGHT
W WINDS AROUND 10 KT. SEAS 4 TO 6 FT.
TUE AND TUE NIGHT
W WINDS 10 TO 15 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.
ANZ283-220300-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
1004 AM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 15 TO 20 KT, INCREASING TO 20 TO
25 KT. SEAS AROUND 3 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND NE
3 FT AT 5 SECONDS. SHOWERS LIKELY THIS MORNING.
TONIGHT
N WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS AROUND 3 FT. WAVE DETAIL: NE
3 FT AT 5 SECONDS AND SW 2 FT AT 5 SECONDS. PATCHY FOG.
SAT
N WINDS 10 TO 15 KT, BECOMING W 5 TO 10 KT IN THE
AFTERNOON. SEAS AROUND 3 FT. WAVE DETAIL: NE 3 FT AT 5 SECONDS
AND W 2 FT AT 5 SECONDS. PATCHY FOG IN THE MORNING.
SAT NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 3 FT. WAVE DETAIL:
SW 2 FT AT 4 SECONDS AND E 2 FT AT 7 SECONDS. SHOWERS. PATCHY FOG
IN THE EVENING.
SUN
S WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SW 5 FT
AT 7 SECONDS AND E 4 FT AT 7 SECONDS. SHOWERS, MAINLY IN THE
MORNING.
SUN NIGHT
SW WINDS AROUND 10 KT. SEAS 5 TO 7 FT. WAVE DETAIL:
S 4 FT AT 7 SECONDS AND SW 4 FT AT 8 SECONDS. A CHANCE OF
SHOWERS.
MON AND MON NIGHT
W WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
TUE AND TUE NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP 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.
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