391
FZUS51 KBOX 201103
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
703 AM EDT SUN SEP 20 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-210000-
703 AM EDT SUN SEP 20 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
LOW PRES SYSTEM BRINGS THE THREAT OF WIDESPREAD RAIN, ESPECIALLY THE
SOUTHERN WATERS TOMORROW. HIGH PRES BUILDS IN FROM THE N EARLY NEXT
WEEK WITH THE DISTANT SYSTEM OFF SHORE, THIS COULD PROVIDE A PERIOD
OF STRONG EASTERLY WIND, NEAR GALE FORCE, TUE INTO WED. THERE IS
POTENTIAL FOR A COASTAL LOW TO TRACK NORTHWARD LATE WEEK BRINGING
STRONG WINDS AND ROUGH SEAS BUT CONFIDENCE IS LOW IN THE EXACT TRACK
AND THUS IMPACTS.
ANZ250-210000-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
703 AM EDT SUN SEP 20 2026
TODAY
SE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E 2 FT
AT 4 SECONDS AND SE 2 FT AT 10 SECONDS. PATCHY FOG THIS
AFTERNOON. SHOWERS LIKELY THIS AFTERNOON.
TONIGHT
E WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND SE 1 FOOT AT
10 SECONDS. PATCHY FOG. SHOWERS LIKELY. VSBY 1 TO 3 NM.
MON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
4 FT. WAVE DETAIL: NE 4 FT AT 4 SECONDS AND SE 2 FT AT 9 SECONDS.
MON NIGHT
NE 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:
NE 4 FT AT 5 SECONDS AND SE 2 FT AT 9 SECONDS.
TUE AND TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
SEAS 3 TO 5 FT. WAVE DETAIL: E 5 FT AT 7 SECONDS AND E 5 FT AT
14 SECONDS.
WED
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 5 TO
7 FT. WAVE DETAIL: E 7 FT AT 9 SECONDS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
6 TO 9 FT.
THU
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS 8 TO
11 FT.
THU NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS
10 TO 14 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.
ANZ251-210000-
MASSACHUSETTS BAY AND IPSWICH BAY-
703 AM EDT SUN SEP 20 2026
TODAY
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: E
2 FT AT 4 SECONDS AND SW 1 FOOT AT 4 SECONDS. PATCHY FOG THIS
AFTERNOON. SHOWERS LIKELY THIS AFTERNOON.
TONIGHT
SE WINDS 10 TO 15 KT, BECOMING NE 15 TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 4 SECONDS AND E
1 FOOT AT 11 SECONDS. PATCHY FOG. SHOWERS. VSBY 1 TO 3 NM.
MON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
3 FT. WAVE DETAIL: N 3 FT AT 5 SECONDS AND E 1 FOOT AT 9 SECONDS.
MON NIGHT
NE WINDS 5 TO 10 KT, INCREASING TO 15 TO 20 KT WITH
GUSTS UP TO 25 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: NE
3 FT AT 5 SECONDS AND W 1 FOOT AT 8 SECONDS.
TUE AND TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: N 4 FT AT 5 SECONDS AND E 2 FT AT
11 SECONDS.
WED AND WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 4 TO 6 FT. WAVE DETAIL: E 6 FT AT 7 SECONDS AND E 6 FT AT
11 SECONDS.
THU
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS 6 TO
9 FT.
THU NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS
7 TO 10 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.
ANZ231-210000-
CAPE COD BAY-
703 AM EDT SUN SEP 20 2026
TODAY
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
1 FOOT AT 3 SECONDS AND NW 1 FOOT AT 4 SECONDS. PATCHY FOG THIS
AFTERNOON. SHOWERS THIS AFTERNOON.
TONIGHT
E WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: S 1 FOOT AT 3 SECONDS AND E 1 FOOT
AT 11 SECONDS. PATCHY FOG. SHOWERS LIKELY. VSBY 1 TO 3 NM.
MON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
4 FT. WAVE DETAIL: N 3 FT AT 4 SECONDS AND E 1 FOOT AT
10 SECONDS. PATCHY FOG IN THE MORNING. A CHANCE OF SHOWERS IN THE
MORNING WITH VSBY 1 TO 3 NM.
MON NIGHT
NE 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: N
3 FT AT 5 SECONDS AND SE 1 FOOT AT 9 SECONDS.
TUE AND TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: NE 4 FT AT 4 SECONDS AND SE 1 FOOT
AT 9 SECONDS.
WED AND WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT.
SEAS 3 TO 5 FT. WAVE DETAIL: NE 5 FT AT 4 SECONDS AND E 5 FT AT
9 SECONDS.
THU
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS 4 TO
6 FT. A CHANCE OF SHOWERS.
THU NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 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.
ANZ254-210000-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
703 AM EDT SUN SEP 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
TODAY
SE WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
2 FT AT 5 SECONDS AND SE 2 FT AT 10 SECONDS. PATCHY FOG THIS
AFTERNOON. SHOWERS LIKELY THIS AFTERNOON.
TONIGHT
E WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
2 FT AT 4 SECONDS AND SE 2 FT AT 10 SECONDS. PATCHY FOG. SHOWERS
LIKELY. VSBY 1 TO 3 NM AFTER MIDNIGHT.
MON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
4 FT, BUILDING TO 4 TO 5 FT IN THE AFTERNOON. WAVE DETAIL: NE
3 FT AT 4 SECONDS AND SE 2 FT AT 9 SECONDS, BECOMING N 4 FT AT
6 SECONDS AND SE 2 FT AT 8 SECONDS. PATCHY FOG IN THE MORNING. A
CHANCE OF SHOWERS IN THE MORNING WITH VSBY 1 TO 3 NM.
MON NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT. WAVE DETAIL: N 4 FT AT 5 SECONDS AND SE 2 FT AT
8 SECONDS.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. WAVE DETAIL: NE 5 FT AT 6 SECONDS AND SE 2 FT AT
15 SECONDS.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
4 TO 6 FT. WAVE DETAIL: E 6 FT AT 8 SECONDS AND E 6 FT AT
14 SECONDS.
WED
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 6 TO
9 FT.
WED NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS
8 TO 11 FT.
THU
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS 10 TO
14 FT. A CHANCE OF SHOWERS.
THU NIGHT
NE WINDS 25 TO 35 KT WITH GUSTS UP TO 40 KT. SEAS
12 TO 16 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.
ANZ255-210000-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
703 AM EDT SUN SEP 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
TODAY
SE WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
2 FT AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS. SHOWERS LIKELY THIS
AFTERNOON.
TONIGHT
SE WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW
2 FT AT 4 SECONDS AND E 2 FT AT 4 SECONDS. PATCHY FOG. SHOWERS.
VSBY 1 TO 3 NM AFTER MIDNIGHT.
MON
NE WINDS 20 TO 25 KT. SEAS 2 TO 4 FT, BUILDING TO 4 TO
5 FT IN THE AFTERNOON. WAVE DETAIL: NE 4 FT AT 5 SECONDS AND SE
2 FT AT 9 SECONDS, BECOMING NE 4 FT AT 5 SECONDS AND NW 2 FT AT
6 SECONDS. A CHANCE OF SHOWERS. PATCHY FOG IN THE MORNING WITH
VSBY 1 TO 3 NM.
MON NIGHT
NE WINDS 15 TO 20 KT, INCREASING TO 20 TO 25 KT
AFTER MIDNIGHT. SEAS 3 TO 5 FT. WAVE DETAIL: N 4 FT AT 5 SECONDS
AND SE 2 FT AT 8 SECONDS.
TUE
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
5 FT. WAVE DETAIL: NE 5 FT AT 6 SECONDS AND SE 2 FT AT
15 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
TUE NIGHT
NE WINDS 25 TO 30 KT. SEAS 5 TO 7 FT. WAVE DETAIL:
NE 7 FT AT 5 SECONDS AND E 5 FT AT 10 SECONDS. A CHANCE OF
SHOWERS IN THE EVENING.
WED
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS 6 TO
9 FT.
WED NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS
8 TO 11 FT.
THU AND THU NIGHT
NE WINDS 30 TO 40 KT. SEAS 10 TO 14 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.
ANZ256-210000-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
703 AM EDT SUN SEP 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
TODAY
SE WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
3 FT AT 4 SECONDS AND SE 1 FOOT AT 8 SECONDS. A SLIGHT CHANCE OF
SHOWERS THIS MORNING, THEN SHOWERS LIKELY THIS AFTERNOON. PATCHY
FOG THIS AFTERNOON.
TONIGHT
SE WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
3 FT AT 5 SECONDS AND SE 3 FT AT 10 SECONDS. PATCHY FOG. SHOWERS.
VSBY 1 TO 3 NM.
MON
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 3 TO
5 FT. WAVE DETAIL: NE 5 FT AT 5 SECONDS AND SE 3 FT AT 9 SECONDS.
PATCHY FOG IN THE MORNING. A CHANCE OF SHOWERS IN THE MORNING.
MON NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
4 TO 5 FT. WAVE DETAIL: NE 5 FT AT 5 SECONDS AND SE 2 FT AT
8 SECONDS.
TUE
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT. SEAS 4 TO
6 FT. WAVE DETAIL: NE 6 FT AT 6 SECONDS AND SE 3 FT AT
15 SECONDS. A CHANCE OF SHOWERS.
TUE NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS
5 TO 8 FT. WAVE DETAIL: NE 8 FT AT 6 SECONDS AND E 8 FT AT
11 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
WED
NE WINDS AROUND 30 KT WITH GUSTS UP TO 40 KT. SEAS 7 TO
10 FT.
WED NIGHT
NE WINDS AROUND 30 KT WITH GUSTS UP TO 40 KT. SEAS
9 TO 13 FT.
THU AND THU NIGHT
NE WINDS 30 TO 40 KT WITH GUSTS UP TO 45 KT.
SEAS 11 TO 15 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.
ANZ232-210000-
NANTUCKET SOUND-
703 AM EDT SUN SEP 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
TODAY
SE WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
2 FT AT 3 SECONDS AND SE 1 FOOT AT 10 SECONDS. PATCHY FOG THIS
AFTERNOON. SHOWERS LIKELY THIS AFTERNOON.
TONIGHT
SE WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SE 2 FT AT 3 SECONDS AND SE 1 FOOT AT 11 SECONDS. PATCHY FOG.
SHOWERS. VSBY 1 TO 3 NM AFTER MIDNIGHT.
MON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
3 FT. WAVE DETAIL: NE 3 FT AT 4 SECONDS AND NW 2 FT AT 6 SECONDS.
PATCHY FOG IN THE MORNING. A CHANCE OF SHOWERS IN THE MORNING
WITH VSBY 1 TO 3 NM.
MON NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 3 FT. WAVE DETAIL: N 3 FT AT 5 SECONDS AND SE 1 FOOT AT
8 SECONDS.
TUE AND TUE NIGHT
NE WINDS 25 TO 30 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: NE 4 FT AT 5 SECONDS AND SE 2 FT AT 10 SECONDS.
WED
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS 4 TO
6 FT. WAVE DETAIL: E 6 FT AT 5 SECONDS AND SE 5 FT AT 9 SECONDS.
WED NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS
5 TO 7 FT.
THU
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS 5 TO
7 FT. A CHANCE OF SHOWERS.
THU NIGHT
NE WINDS 30 TO 40 KT WITH GUSTS UP TO 45 KT. SEAS
6 TO 9 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.
ANZ233-210000-
VINEYARD SOUND-
703 AM EDT SUN SEP 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
TODAY
SE WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
1 FOOT AT 4 SECONDS AND SE 1 FOOT AT 12 SECONDS. A SLIGHT CHANCE
OF SHOWERS THIS MORNING, THEN SHOWERS THIS AFTERNOON. PATCHY FOG
THIS AFTERNOON.
TONIGHT
SE WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL: S
1 FOOT AT 4 SECONDS AND SE 1 FOOT AT 10 SECONDS. PATCHY FOG.
SHOWERS LIKELY. VSBY 1 TO 3 NM.
MON
NE WINDS 20 TO 25 KT. SEAS 2 TO 4 FT. WAVE DETAIL: NE 3 FT
AT 3 SECONDS AND SW 1 FOOT AT 5 SECONDS. PATCHY FOG IN THE
MORNING. A CHANCE OF SHOWERS IN THE MORNING.
MON NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 4 FT. WAVE DETAIL: NE 2 FT AT 4 SECONDS AND W 1 FOOT AT
5 SECONDS.
TUE
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 3 TO
4 FT. WAVE DETAIL: NE 3 FT AT 5 SECONDS AND SE 1 FOOT AT
8 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
3 TO 4 FT. WAVE DETAIL: NE 3 FT AT 5 SECONDS AND SE 2 FT AT
8 SECONDS.
WED AND WED NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT.
SEAS 4 TO 6 FT.
THU AND THU NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 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.
ANZ234-210000-
BUZZARDS BAY-
703 AM EDT SUN SEP 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
TODAY
SE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT THIS AFTERNOON.
SEAS AROUND 2 FT. WAVE DETAIL: SE 1 FOOT AT 3 SECONDS AND SE
1 FOOT AT 10 SECONDS. A SLIGHT CHANCE OF SHOWERS THIS MORNING,
THEN SHOWERS THIS AFTERNOON. PATCHY FOG THIS AFTERNOON.
TONIGHT
SE WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL: S
1 FOOT AT 3 SECONDS AND SE 1 FOOT AT 9 SECONDS. PATCHY FOG.
SHOWERS LIKELY. VSBY 1 TO 3 NM.
MON
NE WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT IN THE
AFTERNOON. SEAS 2 TO 4 FT. WAVE DETAIL: NE 3 FT AT 4 SECONDS AND
SW 1 FOOT AT 5 SECONDS. PATCHY FOG IN THE MORNING. A CHANCE OF
SHOWERS IN THE MORNING.
MON NIGHT
NE WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT
AFTER MIDNIGHT. GUSTS UP TO 25 KT. SEAS 2 TO 3 FT. WAVE DETAIL:
NE 2 FT AT 4 SECONDS AND NW 2 FT AT 5 SECONDS.
TUE AND TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: N 3 FT AT 5 SECONDS AND SE 1 FOOT AT
8 SECONDS.
WED
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS 4 TO
6 FT. WAVE DETAIL: NE 4 FT AT 4 SECONDS AND E 4 FT AT 11 SECONDS.
WED NIGHT
NE WINDS 25 TO 30 KT. SEAS 3 TO 5 FT.
THU AND THU NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 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.
ANZ235-210000-
RHODE ISLAND SOUND-
703 AM EDT SUN SEP 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
TODAY
SE WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
2 FT AT 5 SECONDS AND SE 1 FOOT AT 8 SECONDS. A CHANCE OF SHOWERS
THIS MORNING, THEN SHOWERS THIS AFTERNOON. PATCHY FOG THIS
AFTERNOON.
TONIGHT
SE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND SE
2 FT AT 10 SECONDS. PATCHY FOG. SHOWERS. VSBY 1 TO 3 NM.
MON
NE WINDS 20 TO 25 KT. SEAS 3 TO 4 FT. WAVE DETAIL: NE 4 FT
AT 4 SECONDS AND SE 2 FT AT 9 SECONDS. PATCHY FOG IN THE MORNING.
A CHANCE OF SHOWERS IN THE MORNING.
MON NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 4 FT. WAVE DETAIL: NE 4 FT AT 4 SECONDS AND SE 3 FT AT
8 SECONDS.
TUE
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 3 TO
5 FT. WAVE DETAIL: E 5 FT AT 7 SECONDS AND N 2 FT AT 5 SECONDS. A
CHANCE OF SHOWERS IN THE AFTERNOON.
TUE NIGHT
NE WINDS 20 TO 25 KT, INCREASING TO 25 TO 30 KT
AFTER MIDNIGHT. SEAS 3 TO 5 FT. WAVE DETAIL: NE 5 FT AT
6 SECONDS.
WED
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS 5 TO
7 FT.
WED NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS
6 TO 9 FT.
THU
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS 7 TO
10 FT. A CHANCE OF SHOWERS.
THU NIGHT
NE WINDS 30 TO 35 KT WITH GUSTS UP TO 40 KT. SEAS
8 TO 11 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.
ANZ237-210000-
BLOCK ISLAND SOUND-
703 AM EDT SUN SEP 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
TODAY
SE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT THIS AFTERNOON.
SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 4 SECONDS AND SE 1 FOOT
AT 8 SECONDS. A CHANCE OF SHOWERS THIS MORNING, THEN SHOWERS THIS
AFTERNOON. PATCHY FOG THIS AFTERNOON.
TONIGHT
SE WINDS AROUND 10 KT, BECOMING E WITH GUSTS UP TO
20 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT AT
4 SECONDS AND SE 2 FT AT 10 SECONDS. PATCHY FOG. SHOWERS. VSBY
1 TO 3 NM.
MON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
4 FT. WAVE DETAIL: NE 3 FT AT 4 SECONDS AND SW 2 FT AT 5 SECONDS.
A CHANCE OF SHOWERS IN THE MORNING.
MON NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 4 FT. WAVE DETAIL: E 4 FT AT 5 SECONDS AND NW 2 FT AT
5 SECONDS.
TUE
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 3 TO
5 FT. WAVE DETAIL: E 5 FT AT 7 SECONDS AND N 2 FT AT 4 SECONDS. A
CHANCE OF SHOWERS.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
3 TO 5 FT. WAVE DETAIL: E 5 FT AT 7 SECONDS.
WED
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS 5 TO
7 FT.
WED NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS
6 TO 9 FT.
THU AND THU NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT.
SEAS 9 TO 12 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.
ANZ230-210000-
BOSTON HARBOR-
703 AM EDT SUN SEP 20 2026
TODAY
SE WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS, THEN AROUND
2 FT THIS AFTERNOON. PATCHY FOG THIS AFTERNOON. SHOWERS THIS
AFTERNOON WITH VSBY 1 TO 3 NM.
TONIGHT
SE WINDS 5 TO 10 KT, BECOMING NE 15 TO 20 KT AFTER
MIDNIGHT. WAVES AROUND 2 FT. PATCHY FOG. SHOWERS. VSBY 1 TO 3 NM.
MON
N WINDS 15 TO 20 KT, BECOMING NE 10 TO 15 KT IN THE
AFTERNOON. WAVES 2 TO 3 FT.
MON NIGHT
NE WINDS 5 TO 10 KT, INCREASING TO 15 TO 20 KT WITH
GUSTS UP TO 25 KT AFTER MIDNIGHT. WAVES 1 FOOT OR LESS, THEN 2 TO
3 FT AFTER MIDNIGHT.
TUE AND TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
WAVES 2 TO 3 FT.
WED THROUGH THU
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT.
WAVES 2 TO 3 FT, EXCEPT 4 TO 6 FT AT THE OUTER HARBOR ENTRANCE.
THU NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. WAVES
2 TO 3 FT, EXCEPT 4 TO 6 FT AT THE OUTER HARBOR ENTRANCE. 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.
ANZ236-210000-
NARRAGANSETT BAY-
703 AM EDT SUN SEP 20 2026
TODAY
SE WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH
GUSTS UP TO 20 KT THIS AFTERNOON. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS THIS MORNING, THEN SHOWERS THIS AFTERNOON. PATCHY FOG
THIS AFTERNOON WITH VSBY 1 TO 3 NM.
TONIGHT
SE WINDS 5 TO 10 KT, BECOMING NE 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. WAVES AROUND 2 FT. PATCHY FOG.
SHOWERS. VSBY 1 TO 3 NM.
MON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. WAVES 2 TO
3 FT. A CHANCE OF SHOWERS IN THE MORNING.
MON NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES
AROUND 2 FT.
TUE AND TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
WAVES 2 TO 3 FT.
WED AND WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT.
WAVES 2 TO 3 FT, EXCEPT 4 TO 6 FT AT THE BAY ENTRANCE.
THU AND THU NIGHT
NE WINDS 20 TO 25 KT, INCREASING TO 25 TO
30 KT. WAVES AROUND 3 FT, EXCEPT 5 TO 7 FT AT THE BAY ENTRANCE. 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.
ANZ280-210000-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
703 AM EDT SUN SEP 20 2026
TODAY
SE WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW
2 FT AT 3 SECONDS AND E 2 FT AT 4 SECONDS. SHOWERS LIKELY THIS
AFTERNOON.
TONIGHT
E WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
2 FT AT 4 SECONDS AND SE 1 FOOT AT 10 SECONDS. PATCHY FOG.
SHOWERS LIKELY. VSBY 1 TO 3 NM.
MON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. WAVE DETAIL: NE 4 FT AT 4 SECONDS AND SW 2 FT AT 5 SECONDS.
PATCHY FOG IN THE MORNING. A CHANCE OF SHOWERS IN THE MORNING.
MON NIGHT
NE WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT
AFTER MIDNIGHT. GUSTS UP TO 25 KT. SEAS 3 TO 4 FT. WAVE DETAIL:
NE 4 FT AT 5 SECONDS AND W 2 FT AT 6 SECONDS.
TUE AND TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
SEAS 3 TO 5 FT. WAVE DETAIL: E 5 FT AT 7 SECONDS AND E 5 FT AT
14 SECONDS.
WED
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 5 TO
7 FT. WAVE DETAIL: E 7 FT AT 9 SECONDS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
7 TO 9 FT.
THU
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS 9 TO
13 FT.
THU NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS
11 TO 14 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.
ANZ281-210000-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
703 AM EDT SUN SEP 20 2026
TODAY
SE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E 2 FT
AT 5 SECONDS AND SE 2 FT AT 11 SECONDS. A CHANCE OF SHOWERS THIS
AFTERNOON.
TONIGHT
E WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
2 FT AT 4 SECONDS AND SE 2 FT AT 10 SECONDS. PATCHY FOG. SHOWERS
LIKELY. VSBY 1 TO 3 NM AFTER MIDNIGHT.
MON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. WAVE DETAIL: N 4 FT AT 5 SECONDS AND SE 3 FT AT 9 SECONDS.
PATCHY FOG IN THE MORNING. A CHANCE OF SHOWERS IN THE MORNING
WITH VSBY 1 TO 3 NM.
MON NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
4 TO 5 FT. WAVE DETAIL: E 5 FT AT 7 SECONDS AND N 3 FT AT
5 SECONDS.
TUE
NE WINDS AROUND 20 KT WITH GUSTS UP TO 30 KT. SEAS 5 TO
6 FT. WAVE DETAIL: N 6 FT AT 6 SECONDS AND E 3 FT AT 14 SECONDS.
A CHANCE OF SHOWERS IN THE AFTERNOON.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
5 TO 6 FT, BUILDING TO 5 TO 8 FT AFTER MIDNIGHT. WAVE DETAIL: E
6 FT AT 7 SECONDS AND N 1 FOOT AT 4 SECONDS, BECOMING E 8 FT AT
8 SECONDS AND E 8 FT AT 11 SECONDS.
WED
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS 7 TO
10 FT.
WED NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS
10 TO 14 FT.
THU
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS 12 TO
17 FT. A CHANCE OF SHOWERS.
THU NIGHT
NE WINDS AROUND 30 KT WITH GUSTS UP TO 40 KT. SEAS
15 TO 18 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.
ANZ282-210000-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
703 AM EDT SUN SEP 20 2026
TODAY
E WINDS 5 TO 10 KT. SEAS AROUND 3 FT. WAVE DETAIL: E
3 FT AT 6 SECONDS AND SE 2 FT AT 11 SECONDS. A CHANCE OF SHOWERS
THIS AFTERNOON.
TONIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 3 FT. WAVE DETAIL: SE
3 FT AT 9 SECONDS AND NW 2 FT AT 5 SECONDS. PATCHY FOG. SHOWERS
LIKELY. VSBY 1 TO 3 NM AFTER MIDNIGHT.
MON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. WAVE DETAIL: N 4 FT AT 5 SECONDS AND SE 3 FT AT 8 SECONDS.
SHOWERS LIKELY, MAINLY IN THE MORNING. PATCHY FOG IN THE MORNING.
MON NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
4 TO 5 FT. WAVE DETAIL: E 5 FT AT 7 SECONDS AND N 4 FT AT
6 SECONDS.
TUE
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 5 TO
7 FT. WAVE DETAIL: NE 7 FT AT 7 SECONDS AND E 3 FT AT 14 SECONDS.
A CHANCE OF SHOWERS.
TUE NIGHT
NE WINDS 20 TO 25 KT, INCREASING TO 25 TO 30 KT
AFTER MIDNIGHT. SEAS 6 TO 9 FT. WAVE DETAIL: E 9 FT AT 9 SECONDS
AND N 1 FOOT AT 4 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
WED
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS 8 TO
11 FT.
WED NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS
11 TO 15 FT.
THU AND THU NIGHT
NE WINDS 30 TO 35 KT WITH GUSTS UP TO 45 KT.
SEAS 14 TO 19 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.
ANZ283-210000-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
703 AM EDT SUN SEP 20 2026
TODAY
SE WINDS 10 TO 15 KT. SEAS AROUND 3 FT. WAVE DETAIL: E
3 FT AT 5 SECONDS AND SE 2 FT AT 10 SECONDS. A CHANCE OF SHOWERS
THIS AFTERNOON.
TONIGHT
SE WINDS 10 TO 15 KT. SEAS AROUND 3 FT. WAVE DETAIL: E
3 FT AT 6 SECONDS AND SE 3 FT AT 10 SECONDS. PATCHY FOG. SHOWERS.
VSBY 1 TO 3 NM AFTER MIDNIGHT.
MON
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 3 TO
5 FT, BUILDING TO 5 TO 6 FT IN THE AFTERNOON. WAVE DETAIL: NE
5 FT AT 5 SECONDS AND SE 3 FT AT 8 SECONDS, BECOMING NE 6 FT AT
6 SECONDS AND W 2 FT AT 5 SECONDS. SHOWERS LIKELY, MAINLY IN THE
MORNING. PATCHY FOG IN THE MORNING.
MON NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
5 TO 6 FT. WAVE DETAIL: E 6 FT AT 7 SECONDS AND N 4 FT AT
5 SECONDS.
TUE
NE WINDS AROUND 25 KT WITH GUSTS UP TO 35 KT. SEAS 5 TO
8 FT. WAVE DETAIL: NE 8 FT AT 6 SECONDS AND E 5 FT AT 13 SECONDS.
A CHANCE OF SHOWERS.
TUE NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS
7 TO 10 FT. WAVE DETAIL: E 10 FT AT 8 SECONDS AND N 2 FT AT
5 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
WED
NE WINDS AROUND 30 KT WITH GUSTS UP TO 40 KT. SEAS 9 TO
13 FT.
WED NIGHT
NE WINDS AROUND 30 KT WITH GUSTS UP TO 45 KT. SEAS
12 TO 16 FT.
THU AND THU NIGHT
NE WINDS 30 TO 35 KT WITH GUSTS UP TO 45 KT.
SEAS 14 TO 18 FT, BUILDING TO 16 TO 19 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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