769
FZUS51 KBOX 201704
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
103 PM EDT TUE OCT 20 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-210600-
103 PM EDT TUE OCT 20 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
HIGH PRESSURE OVER THE NORTHERN WATERS AND A LOW PRESSURE SYSTEM
DEVELOPING OFF THE SOUTHERN MID ATLANTIC COAST LINGER THROUGH THE
END OF THE WEEK. THE WORST IMPACTS FROM THIS STORM MAY REMAIN SOUTH
OF OUR WATERS, THOUGH NORTHEAST GALE-FORCE WINDS AND ROUGH SEAS ARE
STILL EXPECTED, ESPECIALLY ACROSS THE SOUTHERN WATERS.
ANZ250-210600-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
103 PM EDT TUE OCT 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING
THIS AFTERNOON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
SEAS 7 TO 8 FT. WAVE DETAIL: E 8 FT AT 10 SECONDS AND N 7 FT AT
6 SECONDS.
TONIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT. SEAS 6 TO
8 FT. WAVE DETAIL: N 8 FT AT 6 SECONDS AND E 8 FT AT 10 SECONDS.
WED
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 6 TO
8 FT. WAVE DETAIL: E 8 FT AT 9 SECONDS AND N 7 FT AT 6 SECONDS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
6 TO 7 FT. WAVE DETAIL: N 7 FT AT 6 SECONDS AND E 7 FT AT
9 SECONDS.
THU AND THU NIGHT
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 5 TO 8 FT. WAVE DETAIL: N 7 FT AT 6 SECONDS AND E 7 FT AT
9 SECONDS.
FRI AND FRI NIGHT
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT,
DIMINISHING TO 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 5 TO
8 FT. WAVE DETAIL: N 8 FT AT 7 SECONDS AND E 8 FT AT 9 SECONDS.
SAT
W WINDS 5 TO 10 KT. SEAS 4 TO 6 FT.
SAT NIGHT
W WINDS 5 TO 10 KT. SEAS 3 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.
ANZ251-210600-
MASSACHUSETTS BAY AND IPSWICH BAY-
103 PM EDT TUE OCT 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING
THIS AFTERNOON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
SEAS 4 TO 6 FT. WAVE DETAIL: N 6 FT AT 6 SECONDS AND E 6 FT AT
10 SECONDS.
TONIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT. SEAS 5 TO
7 FT. WAVE DETAIL: N 7 FT AT 5 SECONDS AND E 7 FT AT 10 SECONDS.
WED
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 5 TO
7 FT. WAVE DETAIL: N 7 FT AT 6 SECONDS AND E 7 FT AT 9 SECONDS.
WED NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS
4 TO 6 FT. WAVE DETAIL: N 6 FT AT 6 SECONDS AND E 6 FT AT
9 SECONDS.
THU AND THU NIGHT
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 4 TO 6 FT. WAVE DETAIL: N 6 FT AT 6 SECONDS AND E 6 FT AT
9 SECONDS.
FRI AND FRI NIGHT
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT,
DIMINISHING TO 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 4 TO
6 FT. WAVE DETAIL: N 6 FT AT 5 SECONDS AND NE 6 FT AT 9 SECONDS.
SAT
W WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
SAT NIGHT
W 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.
ANZ231-210600-
CAPE COD BAY-
103 PM EDT TUE OCT 20 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
THIS AFTERNOON
NE WINDS AROUND 20 KT WITH GUSTS UP TO 35 KT.
SEAS 3 TO 5 FT. WAVE DETAIL: E 5 FT AT 10 SECONDS AND N 4 FT AT
5 SECONDS.
TONIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 40 KT. SEAS 4 TO
6 FT. WAVE DETAIL: N 6 FT AT 5 SECONDS AND E 6 FT AT 10 SECONDS.
WED
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT. SEAS 4 TO
6 FT. WAVE DETAIL: N 6 FT AT 5 SECONDS AND E 6 FT AT 9 SECONDS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT. SEAS
3 TO 5 FT. WAVE DETAIL: N 5 FT AT 5 SECONDS AND E 5 FT AT
9 SECONDS. A CHANCE OF SHOWERS.
THU
N WINDS 25 TO 30 KT, DIMINISHING TO 20 TO 25 KT IN THE
AFTERNOON. SEAS 3 TO 5 FT. WAVE DETAIL: N 5 FT AT 5 SECONDS AND E
5 FT AT 9 SECONDS.
THU NIGHT
N WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS
4 TO 6 FT. WAVE DETAIL: N 6 FT AT 6 SECONDS AND E 5 FT AT
9 SECONDS.
FRI
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
6 FT.
FRI NIGHT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT.
SAT AND SAT NIGHT
NW WINDS 5 TO 10 KT, BECOMING W. 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.
ANZ254-210600-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
103 PM EDT TUE OCT 20 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
THIS AFTERNOON
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 40 KT.
SEAS 7 TO 9 FT. WAVE DETAIL: E 9 FT AT 10 SECONDS AND N 6 FT AT
5 SECONDS.
TONIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS 7 TO
10 FT. WAVE DETAIL: E 10 FT AT 9 SECONDS AND NE 8 FT AT
7 SECONDS.
WED
NE WINDS 25 TO 30 KT, DIMINISHING TO 20 TO 25 KT IN THE
AFTERNOON. GUSTS UP TO 40 KT. SEAS 8 TO 11 FT. WAVE DETAIL: E
10 FT AT 9 SECONDS AND NE 8 FT AT 7 SECONDS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT. SEAS
7 TO 10 FT. WAVE DETAIL: E 9 FT AT 9 SECONDS AND N 6 FT AT
6 SECONDS. A CHANCE OF SHOWERS.
THU
N WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS 7 TO
10 FT. WAVE DETAIL: E 8 FT AT 9 SECONDS AND N 7 FT AT 6 SECONDS.
A CHANCE OF SHOWERS IN THE MORNING.
THU NIGHT
N WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS
7 TO 10 FT. WAVE DETAIL: N 7 FT AT 7 SECONDS AND E 6 FT AT
9 SECONDS.
FRI
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 7 TO
10 FT.
FRI NIGHT
N WINDS 20 TO 25 KT. SEAS 6 TO 9 FT.
SAT
NW WINDS 10 TO 15 KT. SEAS 5 TO 8 FT.
SAT NIGHT
W WINDS 5 TO 10 KT. SEAS 4 TO 6 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.
ANZ255-210600-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
103 PM EDT TUE OCT 20 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
THIS AFTERNOON
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT.
SEAS 7 TO 10 FT. WAVE DETAIL: N 7 FT AT 6 SECONDS AND E 7 FT AT
10 SECONDS.
TONIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS 8 TO
11 FT. WAVE DETAIL: N 9 FT AT 6 SECONDS AND E 9 FT AT 9 SECONDS.
WED
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS 8 TO
11 FT. WAVE DETAIL: E 10 FT AT 9 SECONDS AND N 9 FT AT 7 SECONDS.
WED NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS
8 TO 11 FT. WAVE DETAIL: N 8 FT AT 7 SECONDS AND E 8 FT AT
10 SECONDS. A CHANCE OF SHOWERS.
THU
N WINDS 30 TO 35 KT, DIMINISHING TO 25 TO 30 KT IN THE
AFTERNOON. SEAS 7 TO 10 FT. WAVE DETAIL: N 8 FT AT 6 SECONDS AND
E 6 FT AT 9 SECONDS. A CHANCE OF SHOWERS IN THE MORNING.
THU NIGHT
N WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS
6 TO 9 FT. WAVE DETAIL: N 7 FT AT 6 SECONDS AND E 6 FT AT
9 SECONDS.
FRI
N WINDS 25 TO 30 KT. SEAS 6 TO 9 FT.
FRI NIGHT
N WINDS 20 TO 25 KT. SEAS 5 TO 7 FT.
SAT AND SAT NIGHT
NW WINDS 10 TO 15 KT, BECOMING W AROUND
5 KT. SEAS 4 TO 6 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-
103 PM EDT TUE OCT 20 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
THIS AFTERNOON
NE WINDS AROUND 25 KT WITH GUSTS UP TO 40 KT.
SEAS 7 TO 10 FT. WAVE DETAIL: E 8 FT AT 10 SECONDS AND N 6 FT AT
6 SECONDS.
TONIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS 8 TO
11 FT. WAVE DETAIL: E 10 FT AT 9 SECONDS AND N 6 FT AT 6 SECONDS.
WED
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS 9 TO
12 FT. WAVE DETAIL: E 11 FT AT 9 SECONDS AND N 6 FT AT 6 SECONDS.
WED NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS
8 TO 11 FT. WAVE DETAIL: E 10 FT AT 10 SECONDS AND N 6 FT AT
6 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
THU
N WINDS 25 TO 30 KT, DIMINISHING TO 20 TO 25 KT IN THE
AFTERNOON. SEAS 7 TO 10 FT. WAVE DETAIL: E 9 FT AT 10 SECONDS AND
N 6 FT AT 6 SECONDS.
THU NIGHT
N WINDS 25 TO 30 KT. SEAS 5 TO 8 FT. WAVE DETAIL: N
6 FT AT 6 SECONDS AND E 6 FT AT 9 SECONDS.
FRI AND FRI NIGHT
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT,
DIMINISHING TO 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 5 TO
8 FT.
SAT
NW WINDS 5 TO 10 KT. SEAS 4 TO 6 FT.
SAT NIGHT
W WINDS 5 TO 10 KT. SEAS 3 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.
ANZ232-210600-
NANTUCKET SOUND-
103 PM EDT TUE OCT 20 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
THIS AFTERNOON
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 40 KT.
SEAS 4 TO 6 FT. WAVE DETAIL: N 5 FT AT 5 SECONDS AND E 5 FT AT
10 SECONDS.
TONIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 40 KT. SEAS 5 TO
7 FT. WAVE DETAIL: N 6 FT AT 5 SECONDS AND E 4 FT AT 10 SECONDS.
WED
NE WINDS 25 TO 30 KT, DIMINISHING TO 20 TO 25 KT IN THE
AFTERNOON. GUSTS UP TO 40 KT. SEAS 5 TO 7 FT. WAVE DETAIL: N 6 FT
AT 5 SECONDS AND E 5 FT AT 9 SECONDS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT. SEAS
4 TO 6 FT. WAVE DETAIL: N 6 FT AT 5 SECONDS AND E 4 FT AT
9 SECONDS. A CHANCE OF SHOWERS.
THU AND THU NIGHT
N WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT.
SEAS 4 TO 6 FT. WAVE DETAIL: N 6 FT AT 5 SECONDS AND E 4 FT AT
9 SECONDS.
FRI
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
6 FT. WAVE DETAIL: N 5 FT AT 5 SECONDS AND E 3 FT AT 9 SECONDS.
FRI NIGHT
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT.
SAT AND SAT NIGHT
W 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.
ANZ233-210600-
VINEYARD SOUND-
103 PM EDT TUE OCT 20 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
THIS AFTERNOON
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT.
SEAS 4 TO 6 FT. WAVE DETAIL: N 4 FT AT 4 SECONDS AND SE 1 FOOT AT
10 SECONDS.
TONIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT. SEAS 4 TO
6 FT. WAVE DETAIL: NE 5 FT AT 5 SECONDS AND E 2 FT AT 9 SECONDS.
WED
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT. SEAS 4 TO
6 FT. WAVE DETAIL: N 5 FT AT 6 SECONDS AND SE 2 FT AT 9 SECONDS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
3 TO 5 FT. WAVE DETAIL: N 5 FT AT 7 SECONDS AND NE 4 FT AT
4 SECONDS. A CHANCE OF SHOWERS.
THU AND THU NIGHT
N WINDS 25 TO 30 KT. SEAS 3 TO 5 FT. WAVE
DETAIL: N 5 FT AT 5 SECONDS AND E 1 FOOT AT 10 SECONDS.
FRI AND FRI NIGHT
N WINDS 20 TO 25 KT, DIMINISHING TO 10 TO
15 KT. SEAS 2 TO 4 FT. WAVE DETAIL: N 3 FT AT 4 SECONDS AND SE
1 FOOT AT 10 SECONDS.
SAT AND SAT 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.
ANZ234-210600-
BUZZARDS BAY-
103 PM EDT TUE OCT 20 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
THIS AFTERNOON
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT.
SEAS 4 TO 6 FT. WAVE DETAIL: N 5 FT AT 4 SECONDS AND E 2 FT AT
10 SECONDS.
TONIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT. SEAS 4 TO
6 FT. WAVE DETAIL: N 5 FT AT 5 SECONDS AND E 2 FT AT 10 SECONDS.
WED
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT. SEAS 3 TO
5 FT. WAVE DETAIL: N 5 FT AT 5 SECONDS AND E 2 FT AT 10 SECONDS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
3 TO 5 FT. WAVE DETAIL: N 5 FT AT 5 SECONDS AND E 2 FT AT
12 SECONDS.
THU
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 3 TO
5 FT, SUBSIDING TO 2 TO 3 FT IN THE AFTERNOON. WAVE DETAIL: N
5 FT AT 5 SECONDS AND E 1 FOOT AT 11 SECONDS, BECOMING N 3 FT AT
4 SECONDS AND E 2 FT AT 10 SECONDS.
THU NIGHT
N WINDS 20 TO 25 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N
3 FT AT 4 SECONDS AND E 1 FOOT AT 9 SECONDS.
FRI THROUGH SAT NIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP TO
25 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.
ANZ235-210600-
RHODE ISLAND SOUND-
103 PM EDT TUE OCT 20 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
THIS AFTERNOON
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT.
SEAS 5 TO 7 FT. WAVE DETAIL: E 6 FT AT 10 SECONDS AND N 5 FT AT
5 SECONDS.
TONIGHT
NE WINDS 20 TO 25 KT, INCREASING TO 25 TO 30 KT AFTER
MIDNIGHT. SEAS 5 TO 7 FT. WAVE DETAIL: N 6 FT AT 5 SECONDS AND E
5 FT AT 10 SECONDS.
WED
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS 5 TO
7 FT. WAVE DETAIL: N 6 FT AT 6 SECONDS AND E 5 FT AT 9 SECONDS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
5 TO 7 FT. WAVE DETAIL: N 5 FT AT 6 SECONDS AND E 5 FT AT
10 SECONDS.
THU
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
6 FT. WAVE DETAIL: N 6 FT AT 5 SECONDS AND SE 4 FT AT 10 SECONDS.
THU NIGHT
N WINDS 20 TO 25 KT. SEAS 3 TO 5 FT. WAVE DETAIL: N
4 FT AT 4 SECONDS AND SE 3 FT AT 9 SECONDS.
FRI
N WINDS 20 TO 25 KT. SEAS 3 TO 5 FT.
FRI NIGHT AND SAT
N WINDS 10 TO 15 KT, BECOMING NW 5 TO 10 KT.
SEAS 2 TO 4 FT.
SAT 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.
ANZ237-210600-
BLOCK ISLAND SOUND-
103 PM EDT TUE OCT 20 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
THIS AFTERNOON
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT.
SEAS 5 TO 7 FT. WAVE DETAIL: E 7 FT AT 11 SECONDS AND NE 4 FT AT
6 SECONDS.
TONIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT. SEAS 5 TO
7 FT. WAVE DETAIL: E 7 FT AT 10 SECONDS AND NE 5 FT AT 6 SECONDS.
WED
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT. SEAS 5 TO
8 FT. WAVE DETAIL: E 7 FT AT 9 SECONDS AND NE 5 FT AT 6 SECONDS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
5 TO 7 FT. WAVE DETAIL: E 7 FT AT 10 SECONDS AND NE 5 FT AT
6 SECONDS.
THU
N WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 30 KT. SEAS 5 TO 7 FT. WAVE DETAIL: E 6 FT
AT 10 SECONDS AND N 5 FT AT 5 SECONDS.
THU NIGHT
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT. WAVE DETAIL: N 4 FT AT 4 SECONDS AND E 4 FT AT
10 SECONDS.
FRI
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT.
FRI NIGHT THROUGH SAT NIGHT
W 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.
ANZ230-210600-
BOSTON HARBOR-
103 PM EDT TUE OCT 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE WEDNESDAY NIGHT
THIS AFTERNOON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
WAVES 2 TO 3 FT.
TONIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. WAVES
2 TO 3 FT.
WED
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. WAVES 2 TO
3 FT.
WED NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. WAVES
2 TO 3 FT.
THU AND THU NIGHT
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
WAVES AROUND 2 FT.
FRI THROUGH SAT NIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP TO
25 KT. WAVES AROUND 2 FT, EXCEPT 3 TO 5 FT AT THE OUTER HARBOR
ENTRANCE.
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-
103 PM EDT TUE OCT 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE WEDNESDAY NIGHT
THIS AFTERNOON
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
WAVES AROUND 3 FT.
TONIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. WAVES
2 TO 3 FT.
WED
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. WAVES AROUND
3 FT.
WED NIGHT
N WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. WAVES
AROUND 3 FT.
THU AND THU NIGHT
N WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT.
WAVES 2 TO 3 FT.
FRI THROUGH SAT NIGHT
W WINDS 15 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.
ANZ280-210600-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
103 PM EDT TUE OCT 20 2026
THIS AFTERNOON
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT.
SEAS 7 TO 9 FT. WAVE DETAIL: E 7 FT AT 10 SECONDS AND N 6 FT AT
6 SECONDS.
TONIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT. SEAS 7 TO
9 FT. WAVE DETAIL: E 8 FT AT 9 SECONDS AND N 6 FT AT 6 SECONDS.
WED
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 7 TO
9 FT. WAVE DETAIL: E 8 FT AT 9 SECONDS AND N 6 FT AT 5 SECONDS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
6 TO 8 FT. WAVE DETAIL: E 7 FT AT 9 SECONDS AND N 4 FT AT
5 SECONDS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
THU
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 6 TO
8 FT. WAVE DETAIL: E 6 FT AT 9 SECONDS AND N 5 FT AT 5 SECONDS.
THU NIGHT
N WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS
6 TO 8 FT, BUILDING TO 8 TO 10 FT AFTER MIDNIGHT. WAVE DETAIL: N
6 FT AT 6 SECONDS AND E 5 FT AT 9 SECONDS, BECOMING N 8 FT AT
7 SECONDS AND E 5 FT AT 9 SECONDS.
FRI
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 8 TO
10 FT.
FRI NIGHT
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
6 TO 9 FT.
SAT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 5 TO
7 FT.
SAT NIGHT
W WINDS 5 TO 10 KT. SEAS 3 TO 5 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.
ANZ281-210600-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
103 PM EDT TUE OCT 20 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
THIS AFTERNOON
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT.
SEAS 9 TO 11 FT. WAVE DETAIL: E 9 FT AT 10 SECONDS AND N 7 FT AT
7 SECONDS.
TONIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS 9 TO
12 FT. WAVE DETAIL: E 10 FT AT 10 SECONDS AND N 9 FT AT
7 SECONDS.
WED
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 45 KT. SEAS 9 TO
12 FT. WAVE DETAIL: E 11 FT AT 9 SECONDS AND N 8 FT AT 6 SECONDS.
A CHANCE OF SHOWERS IN THE AFTERNOON.
WED NIGHT
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 40 KT. SEAS
8 TO 11 FT. WAVE DETAIL: E 10 FT AT 9 SECONDS AND N 6 FT AT
6 SECONDS. SHOWERS LIKELY.
THU
N WINDS 25 TO 30 KT WITH GUSTS UP TO 45 KT. SEAS 9 TO
12 FT. WAVE DETAIL: E 9 FT AT 9 SECONDS AND N 8 FT AT 7 SECONDS.
A CHANCE OF SHOWERS.
THU NIGHT
N WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS
9 TO 12 FT. WAVE DETAIL: N 10 FT AT 8 SECONDS AND E 8 FT AT
9 SECONDS.
FRI AND FRI NIGHT
N WINDS 25 TO 30 KT, DIMINISHING TO 20 TO
25 KT. SEAS 9 TO 12 FT.
SAT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 7 TO
10 FT.
SAT NIGHT
W WINDS 5 TO 10 KT. SEAS 5 TO 8 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.
ANZ282-210600-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
103 PM EDT TUE OCT 20 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
THIS AFTERNOON
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 45 KT.
SEAS 11 TO 12 FT. WAVE DETAIL: E 11 FT AT 10 SECONDS AND N 9 FT
AT 7 SECONDS.
TONIGHT
NE WINDS AROUND 30 KT WITH GUSTS UP TO 45 KT. SEAS
11 TO 13 FT. WAVE DETAIL: E 13 FT AT 9 SECONDS AND NE 10 FT AT
8 SECONDS.
WED
NE WINDS AROUND 30 KT WITH GUSTS UP TO 45 KT. SEAS 12 TO
13 FT. WAVE DETAIL: NE 13 FT AT 9 SECONDS AND N 10 FT AT
8 SECONDS. A CHANCE OF SHOWERS.
WED NIGHT
NE WINDS 30 TO 35 KT WITH GUSTS UP TO 45 KT. SEAS
11 TO 13 FT. WAVE DETAIL: E 13 FT AT 9 SECONDS AND NE 10 FT AT
8 SECONDS. SHOWERS.
THU
N WINDS 30 TO 35 KT WITH GUSTS UP TO 45 KT. SEAS 10 TO
12 FT. WAVE DETAIL: N 10 FT AT 7 SECONDS AND E 10 FT AT
9 SECONDS. A CHANCE OF SHOWERS.
THU NIGHT
N WINDS 25 TO 30 KT WITH GUSTS UP TO 35 KT. SEAS
9 TO 12 FT. WAVE DETAIL: E 11 FT AT 9 SECONDS AND N 9 FT AT
8 SECONDS.
FRI AND FRI NIGHT
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT.
SEAS 9 TO 12 FT.
SAT
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 7 TO
10 FT.
SAT NIGHT
NW WINDS 5 TO 10 KT. SEAS 6 TO 8 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-
103 PM EDT TUE OCT 20 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
THIS AFTERNOON
NE WINDS 25 TO 30 KT WITH GUSTS UP TO 45 KT.
SEAS 10 TO 11 FT. WAVE DETAIL: E 11 FT AT 10 SECONDS AND N 8 FT
AT 7 SECONDS.
TONIGHT
NE WINDS AROUND 30 KT WITH GUSTS UP TO 45 KT. SEAS
10 TO 13 FT. WAVE DETAIL: NE 13 FT AT 9 SECONDS AND N 6 FT AT
7 SECONDS.
WED
NE WINDS 30 TO 35 KT WITH GUSTS UP TO 45 KT. SEAS 12 TO
14 FT. WAVE DETAIL: NE 14 FT AT 9 SECONDS AND N 9 FT AT
8 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
WED NIGHT
NE WINDS 30 TO 35 KT WITH GUSTS UP TO 45 KT. SEAS
12 TO 13 FT. WAVE DETAIL: NE 13 FT AT 10 SECONDS AND N 10 FT AT
8 SECONDS. A CHANCE OF SHOWERS.
THU
N WINDS 25 TO 35 KT. GUSTS UP TO 45 KT IN THE MORNING.
SEAS 11 TO 13 FT, SUBSIDING TO 9 TO 12 FT IN THE AFTERNOON. WAVE
DETAIL: E 12 FT AT 9 SECONDS AND N 9 FT AT 7 SECONDS, BECOMING E
11 FT AT 9 SECONDS AND N 8 FT AT 7 SECONDS.
THU NIGHT
N WINDS 25 TO 30 KT. SEAS 8 TO 11 FT. WAVE DETAIL: N
10 FT AT 7 SECONDS AND E 10 FT AT 9 SECONDS.
FRI
N WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS 8 TO
11 FT.
FRI NIGHT
N WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
7 TO 10 FT.
SAT AND SAT NIGHT
N WINDS 10 TO 15 KT, BECOMING NW 5 TO 10 KT.
SEAS 5 TO 8 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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