062
FZUS51 KBOX 181104
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
704 AM EDT MON MAY 18 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-190000-
704 AM EDT MON MAY 18 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
A WEAK COLD FRONT WILL MOVE INTO THE SOUTHERN WATERS THIS MORNING
BEFORE LIFTING BACK N AS A WARM FRONT LATER TODAY AND THIS EVENING.
GUSTY SW WINDS WILL DEVELOP TUE. A STRONG COLD FRONT WILL CROSS THE
WATERS LATE WED AND WED EVENING. STRONG HIGH PRES BUILDS OVER THE GT
LAKES THU AND MOVES INTO THE WATERS FRI. THE HIGH MOVES OFFSHORE BY
SAT AS A FRONTAL BOUNDARY APPROACHES FROM THE S.
ANZ250-190000-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
704 AM EDT MON MAY 18 2026
TODAY
E WINDS 5 TO 10 KT, BECOMING SE 10 TO 15 KT WITH GUSTS
UP TO 20 KT THIS AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: E 2 FT
AT 3 SECONDS AND SE 2 FT AT 8 SECONDS.
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SE 3 FT AT 7 SECONDS AND S 2 FT AT 3 SECONDS.
TUE
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING S
15 TO 20 KT WITH GUSTS UP TO 30 KT IN THE AFTERNOON. SEAS 2 TO
4 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND SE 2 FT AT 7 SECONDS.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS
3 TO 5 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND SE 3 FT AT
7 SECONDS.
WED
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
4 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND SE 3 FT AT 8 SECONDS.
SHOWERS LIKELY IN THE AFTERNOON.
WED NIGHT
W WINDS AROUND 15 KT, BECOMING NW AFTER MIDNIGHT.
GUSTS UP TO 20 KT. SEAS 2 TO 4 FT. WAVE DETAIL: N 3 FT AT
4 SECONDS AND SE 2 FT AT 8 SECONDS. SHOWERS LIKELY IN THE
EVENING.
THU THROUGH FRI
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT.
FRI NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 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.
ANZ251-190000-
MASSACHUSETTS BAY AND IPSWICH BAY-
704 AM EDT MON MAY 18 2026
TODAY
E WINDS 5 TO 10 KT, BECOMING SE 10 TO 15 KT WITH GUSTS
UP TO 20 KT THIS AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: E 2 FT
AT 3 SECONDS AND W 1 FOOT AT 2 SECONDS.
TONIGHT
S WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
2 FT AT 4 SECONDS AND SE 2 FT AT 8 SECONDS.
TUE
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 3 SECONDS AND SE 2 FT AT
8 SECONDS.
TUE NIGHT
SW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. WAVE DETAIL:
SW 2 FT AT 3 SECONDS AND SE 2 FT AT 7 SECONDS.
WED
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS AND SE 1 FOOT AT
8 SECONDS. SHOWERS LIKELY IN THE AFTERNOON.
WED NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS AROUND 2 FT. WAVE DETAIL: NW 2 FT AT 3 SECONDS AND
SE 1 FOOT AT 8 SECONDS. SHOWERS LIKELY IN THE EVENING.
THU THROUGH FRI
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT.
FRI NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 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.
ANZ231-190000-
CAPE COD BAY-
704 AM EDT MON MAY 18 2026
TODAY
SE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS, THEN AROUND
2 FT THIS AFTERNOON. WAVE DETAIL: E 1 FOOT AT 2 SECONDS AND W
1 FOOT AT 3 SECONDS, BECOMING SE 1 FOOT AT 2 SECONDS AND SW
1 FOOT AT 3 SECONDS.
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: S 1 FOOT AT 2 SECONDS AND E 1 FOOT
AT 3 SECONDS.
TUE
SW WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SW
2 FT AT 3 SECONDS AND NE 1 FOOT AT 4 SECONDS.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
2 TO 4 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS AND SE 1 FOOT AT
9 SECONDS.
WED
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
4 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS AND SE 1 FOOT AT
3 SECONDS. SHOWERS LIKELY IN THE AFTERNOON.
WED NIGHT
W WINDS 10 TO 15 KT, BECOMING NW AFTER MIDNIGHT.
GUSTS UP TO 20 KT. SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT AT
3 SECONDS AND N 1 FOOT AT 3 SECONDS. A CHANCE OF SHOWERS IN THE
EVENING.
THU THROUGH FRI
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT.
FRI NIGHT
S WINDS 5 TO 10 KT. SEAS 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.
ANZ254-190000-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
704 AM EDT MON MAY 18 2026
TODAY
E WINDS AROUND 10 KT, BECOMING SE THIS AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 8 SECONDS AND SW 2 FT AT
5 SECONDS.
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND
SE 3 FT AT 7 SECONDS. PATCHY FOG. VSBY 1 NM OR LESS.
TUE
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. WAVE DETAIL: SW 5 FT AT 6 SECONDS AND SE 2 FT AT 9 SECONDS.
PATCHY FOG. VSBY 1 NM OR LESS, INCREASING TO 1 TO 3 NM IN THE
AFTERNOON.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS
4 TO 6 FT. WAVE DETAIL: S 5 FT AT 7 SECONDS AND E 1 FOOT AT
14 SECONDS.
WED
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT. WAVE DETAIL: S 5 FT AT 7 SECONDS. A CHANCE OF SHOWERS IN
THE AFTERNOON.
WED NIGHT
W WINDS 15 TO 20 KT, BECOMING NW 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 4 TO 6 FT, SUBSIDING TO 3 TO
4 FT AFTER MIDNIGHT. WAVE DETAIL: SW 5 FT AT 6 SECONDS AND SE
3 FT AT 9 SECONDS, BECOMING NW 4 FT AT 4 SECONDS AND S 2 FT AT
8 SECONDS. A CHANCE OF SHOWERS.
THU THROUGH FRI
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 4 FT.
FRI NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 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.
ANZ255-190000-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
704 AM EDT MON MAY 18 2026
TODAY
E WINDS 5 TO 10 KT, BECOMING SE THIS AFTERNOON. SEAS
3 TO 4 FT. WAVE DETAIL: SW 4 FT AT 7 SECONDS AND NE 1 FOOT AT
8 SECONDS.
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND NE
1 FOOT AT 3 SECONDS. PATCHY FOG. VSBY 1 NM OR LESS.
TUE
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT. WAVE DETAIL: SW 6 FT AT 6 SECONDS AND SE 2 FT AT 9 SECONDS.
PATCHY FOG. VSBY 1 NM OR LESS, INCREASING TO 1 TO 3 NM IN THE
AFTERNOON.
TUE NIGHT
SW WINDS AROUND 20 KT WITH GUSTS UP TO 25 KT. SEAS
5 TO 7 FT. WAVE DETAIL: SW 7 FT AT 7 SECONDS AND E 4 FT AT
10 SECONDS. PATCHY FOG IN THE EVENING WITH VSBY 1 NM OR LESS.
WED
SW WINDS AROUND 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO
7 FT. WAVE DETAIL: SW 7 FT AT 7 SECONDS AND SE 1 FOOT AT
3 SECONDS.
WED NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT,
BECOMING NW 10 TO 15 KT AFTER MIDNIGHT. SEAS 5 TO 7 FT, SUBSIDING
TO 3 TO 5 FT AFTER MIDNIGHT. WAVE DETAIL: SW 6 FT AT 7 SECONDS
AND E 1 FOOT AT 10 SECONDS, BECOMING SW 5 FT AT 7 SECONDS AND N
2 FT AT 2 SECONDS. A CHANCE OF SHOWERS.
THU AND THU NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING E 5 TO 10 KT. SEAS 2 TO 4 FT.
FRI
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
FRI NIGHT
SE WINDS 5 TO 10 KT. SEAS 2 TO 3 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.
ANZ256-190000-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
704 AM EDT MON MAY 18 2026
TODAY
E WINDS 5 TO 10 KT, BECOMING SE THIS AFTERNOON. SEAS
3 TO 4 FT. WAVE DETAIL: S 4 FT AT 8 SECONDS AND SW 3 FT AT
7 SECONDS.
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: SW 3 FT AT 7 SECONDS AND S
3 FT AT 8 SECONDS. PATCHY FOG. VSBY 1 NM OR LESS.
TUE
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT. WAVE DETAIL: SW 5 FT AT 6 SECONDS AND SE 2 FT AT 9 SECONDS.
PATCHY FOG. VSBY 1 NM OR LESS, INCREASING TO 1 TO 3 NM IN THE
AFTERNOON.
TUE NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
5 TO 7 FT. WAVE DETAIL: S 7 FT AT 7 SECONDS. PATCHY FOG IN THE
EVENING WITH VSBY 1 TO 3 NM.
WED
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 5 TO
7 FT. WAVE DETAIL: SW 6 FT AT 7 SECONDS AND S 5 FT AT 9 SECONDS.
A CHANCE OF SHOWERS IN THE AFTERNOON.
WED NIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT, BECOMING
NW 10 TO 15 KT AFTER MIDNIGHT. SEAS 4 TO 6 FT. WAVE DETAIL: SW
6 FT AT 7 SECONDS AND SE 2 FT AT 9 SECONDS. A CHANCE OF SHOWERS.
THU AND THU NIGHT
NE WINDS 10 TO 15 KT, BECOMING E 5 TO 10 KT.
SEAS 2 TO 4 FT.
FRI
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
FRI NIGHT
SE WINDS 5 TO 10 KT. SEAS 2 TO 3 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.
ANZ232-190000-
NANTUCKET SOUND-
704 AM EDT MON MAY 18 2026
TODAY
E WINDS AROUND 10 KT, BECOMING SE THIS AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: E 1 FOOT AT 3 SECONDS AND SW 1 FOOT AT
5 SECONDS.
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND
E 1 FOOT AT 3 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM, DECREASING TO
1 NM OR LESS AFTER MIDNIGHT.
TUE
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
4 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND E 1 FOOT AT
4 SECONDS. PATCHY FOG. VSBY 1 NM OR LESS, INCREASING TO 1 TO 3 NM
IN THE AFTERNOON.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 4 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND SE 1 FOOT AT
9 SECONDS. PATCHY FOG IN THE EVENING WITH VSBY 1 NM OR LESS.
WED
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
4 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND SE 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
WED NIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT, BECOMING
NW 10 TO 15 KT AFTER MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: W
3 FT AT 4 SECONDS AND N 2 FT AT 2 SECONDS. A CHANCE OF SHOWERS.
THU THROUGH FRI
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT.
FRI NIGHT
SE WINDS 5 TO 10 KT. SEAS AROUND 2 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.
ANZ233-190000-
VINEYARD SOUND-
704 AM EDT MON MAY 18 2026
TODAY
E WINDS AROUND 10 KT, BECOMING SE THIS AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 7 SECONDS AND SE 2 FT AT
8 SECONDS.
TONIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW
3 FT AT 6 SECONDS AND SE 3 FT AT 9 SECONDS. PATCHY FOG. VSBY 1 TO
3 NM, DECREASING TO 1 NM OR LESS AFTER MIDNIGHT.
TUE
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
4 FT. WAVE DETAIL: SW 4 FT AT 6 SECONDS AND SE 2 FT AT 9 SECONDS.
PATCHY FOG. VSBY 1 NM OR LESS, INCREASING TO 1 TO 3 NM IN THE
AFTERNOON.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT. WAVE DETAIL: SW 5 FT AT 6 SECONDS AND E 2 FT AT
6 SECONDS.
WED
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. WAVE DETAIL: SW 5 FT AT 7 SECONDS AND E 2 FT AT 5 SECONDS.
A CHANCE OF SHOWERS IN THE AFTERNOON.
WED NIGHT
W WINDS 15 TO 20 KT, BECOMING NW AROUND 10 KT AFTER
MIDNIGHT. SEAS 3 TO 5 FT, SUBSIDING TO 2 TO 3 FT AFTER MIDNIGHT.
WAVE DETAIL: SW 5 FT AT 7 SECONDS AND E 1 FOOT AT 9 SECONDS,
BECOMING SW 3 FT AT 7 SECONDS AND N 2 FT AT 2 SECONDS. A CHANCE
OF SHOWERS.
THU THROUGH FRI
E WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
FRI NIGHT
SE WINDS 5 TO 10 KT. SEAS AROUND 2 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.
ANZ234-190000-
BUZZARDS BAY-
704 AM EDT MON MAY 18 2026
TODAY
E WINDS 5 TO 10 KT, BECOMING SE THIS AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 8 SECONDS AND E 1 FOOT AT
2 SECONDS.
TONIGHT
SW WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL: S
2 FT AT 4 SECONDS AND SE 2 FT AT 9 SECONDS. PATCHY FOG AFTER
MIDNIGHT WITH VSBY 1 NM OR LESS.
TUE
SW WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SW
3 FT AT 5 SECONDS AND SE 2 FT AT 8 SECONDS. PATCHY FOG IN THE
MORNING WITH VSBY 1 TO 3 NM.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 4 FT. WAVE DETAIL: S 3 FT AT 6 SECONDS AND SE 1 FOOT AT
18 SECONDS.
WED
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 2 TO
4 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS. A CHANCE OF SHOWERS IN
THE AFTERNOON.
WED NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NW AFTER MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: SW 3 FT AT
6 SECONDS AND N 2 FT AT 2 SECONDS. A CHANCE OF SHOWERS IN THE
EVENING.
THU THROUGH FRI
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
FRI NIGHT
SE WINDS 5 TO 10 KT. SEAS 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.
ANZ235-190000-
RHODE ISLAND SOUND-
704 AM EDT MON MAY 18 2026
TODAY
E WINDS AROUND 10 KT, BECOMING SE THIS AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND E 1 FOOT AT
14 SECONDS.
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 8 SECONDS AND E
1 FOOT AT 3 SECONDS. PATCHY FOG. VSBY 1 NM OR LESS.
TUE
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. WAVE DETAIL: SW 5 FT AT 6 SECONDS AND SE 2 FT AT 9 SECONDS.
PATCHY FOG. VSBY 1 NM OR LESS, INCREASING TO 1 TO 3 NM IN THE
AFTERNOON.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
4 TO 6 FT. WAVE DETAIL: S 6 FT AT 7 SECONDS. PATCHY FOG IN THE
EVENING WITH VSBY 1 TO 3 NM.
WED
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT. WAVE DETAIL: S 6 FT AT 7 SECONDS. A CHANCE OF SHOWERS IN
THE AFTERNOON.
WED NIGHT
W WINDS 15 TO 20 KT, BECOMING NW 10 TO 15 KT AFTER
MIDNIGHT. SEAS 3 TO 5 FT. WAVE DETAIL: S 5 FT AT 7 SECONDS AND NE
1 FOOT AT 2 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
THU AND THU NIGHT
NE WINDS 10 TO 15 KT, BECOMING E 5 TO 10 KT.
SEAS 2 TO 4 FT.
FRI
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
FRI NIGHT
SE WINDS 5 TO 10 KT. SEAS AROUND 2 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.
ANZ237-190000-
BLOCK ISLAND SOUND-
704 AM EDT MON MAY 18 2026
TODAY
E WINDS 5 TO 10 KT, BECOMING SE THIS AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 8 SECONDS AND SW 2 FT AT
7 SECONDS.
TONIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
2 FT AT 7 SECONDS AND E 1 FOOT AT 3 SECONDS. PATCHY FOG. VSBY
1 NM OR LESS.
TUE
SW WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SW
4 FT AT 4 SECONDS AND SE 2 FT AT 9 SECONDS.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT. WAVE DETAIL: SW 4 FT AT 5 SECONDS AND SE 4 FT AT
8 SECONDS.
WED
SW WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SW
4 FT AT 7 SECONDS AND SE 1 FOOT AT 14 SECONDS. A CHANCE OF
SHOWERS IN THE AFTERNOON.
WED NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NW AFTER MIDNIGHT. SEAS 3 TO 5 FT. WAVE DETAIL: SW 3 FT AT
6 SECONDS AND NE 1 FOOT AT 2 SECONDS. A CHANCE OF SHOWERS IN THE
EVENING.
THU THROUGH FRI
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
FRI NIGHT
SE WINDS 5 TO 10 KT. SEAS 2 TO 3 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.
ANZ230-190000-
BOSTON HARBOR-
704 AM EDT MON MAY 18 2026
TODAY
E WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT THIS AFTERNOON. WAVES 1 FOOT OR LESS, THEN AROUND
2 FT THIS AFTERNOON.
TONIGHT
S WINDS AROUND 10 KT. WAVES AROUND 2 FT.
TUE
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES AROUND 2 FT.
TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES
AROUND 2 FT.
WED
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES AROUND
2 FT. SHOWERS IN THE AFTERNOON.
WED NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. WAVES AROUND 2 FT. SHOWERS LIKELY IN THE EVENING.
THU THROUGH FRI
E WINDS 10 TO 15 KT. WAVES AROUND 2 FT.
FRI 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.
ANZ236-190000-
NARRAGANSETT BAY-
704 AM EDT MON MAY 18 2026
TODAY
E WINDS 5 TO 10 KT, BECOMING SE THIS AFTERNOON. WAVES
AROUND 2 FT.
TONIGHT
S WINDS AROUND 10 KT. WAVES AROUND 2 FT. PATCHY FOG
AFTER MIDNIGHT WITH VSBY 1 NM OR LESS.
TUE
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. WAVES 2 TO
3 FT.
TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES
2 TO 3 FT.
WED
SW WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. WAVES 2 TO 4 FT. SHOWERS LIKELY IN
THE AFTERNOON.
WED NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS IN THE EVENING.
THU THROUGH FRI
E WINDS 10 TO 15 KT. WAVES AROUND 2 FT.
FRI NIGHT
SE WINDS 5 TO 10 KT. WAVES AROUND 2 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.
ANZ280-190000-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
704 AM EDT MON MAY 18 2026
TODAY
E WINDS AROUND 10 KT, BECOMING SE THIS AFTERNOON. SEAS
AROUND 3 FT. WAVE DETAIL: S 3 FT AT 8 SECONDS AND W 1 FOOT AT
3 SECONDS.
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND SE 3 FT AT 7 SECONDS.
PATCHY FOG AFTER MIDNIGHT WITH VSBY 1 NM OR LESS.
TUE
SW WINDS AROUND 15 KT WITH GUSTS UP TO 20 KT, INCREASING
TO 20 TO 25 KT WITH GUSTS UP TO 30 KT IN THE AFTERNOON. SEAS 3 TO
4 FT, BUILDING TO 4 TO 6 FT IN THE AFTERNOON. WAVE DETAIL: SW
3 FT AT 5 SECONDS AND SE 2 FT AT 9 SECONDS, BECOMING S 5 FT AT
5 SECONDS AND SE 3 FT AT 9 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 NM OR LESS.
TUE NIGHT
SW WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT
AFTER MIDNIGHT. GUSTS UP TO 30 KT. SEAS 5 TO 7 FT. WAVE DETAIL:
SW 6 FT AT 6 SECONDS AND S 6 FT AT 9 SECONDS.
WED
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS. A CHANCE OF SHOWERS IN
THE AFTERNOON.
WED NIGHT
W WINDS 15 TO 20 KT, BECOMING NW AFTER MIDNIGHT.
GUSTS UP TO 25 KT. SEAS 4 TO 6 FT. WAVE DETAIL: S 4 FT AT
7 SECONDS AND W 3 FT AT 4 SECONDS. A CHANCE OF SHOWERS IN THE
EVENING.
THU AND THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
DIMINISHING TO 5 TO 10 KT. SEAS 2 TO 4 FT.
FRI AND FRI NIGHT
NW WINDS 5 TO 10 KT, BECOMING S. 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.
ANZ281-190000-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
704 AM EDT MON MAY 18 2026
TODAY
E WINDS AROUND 10 KT, BECOMING SE THIS AFTERNOON. SEAS
3 TO 4 FT. WAVE DETAIL: S 4 FT AT 8 SECONDS AND SW 3 FT AT
7 SECONDS.
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND NE 1 FOOT AT
4 SECONDS. PATCHY FOG. VSBY 1 NM OR LESS.
TUE
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT. SEAS 4 TO
6 FT. WAVE DETAIL: SW 6 FT AT 6 SECONDS AND SE 2 FT AT 9 SECONDS.
PATCHY FOG. VSBY 1 NM OR LESS, INCREASING TO 1 TO 3 NM IN THE
AFTERNOON.
TUE NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
AROUND 6 FT. WAVE DETAIL: SW 6 FT AT 7 SECONDS AND SE 4 FT AT
9 SECONDS. PATCHY FOG IN THE EVENING WITH VSBY 1 TO 3 NM.
WED
SW WINDS AROUND 20 KT WITH GUSTS UP TO 30 KT. SEAS 6 TO
7 FT. WAVE DETAIL: SW 6 FT AT 7 SECONDS AND SE 1 FOOT AT
9 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
WED NIGHT
SW WINDS 15 TO 20 KT, BECOMING NW AFTER MIDNIGHT.
GUSTS UP TO 25 KT. SEAS 5 TO 7 FT. WAVE DETAIL: SW 6 FT AT
7 SECONDS AND SE 2 FT AT 9 SECONDS. A CHANCE OF SHOWERS.
THU THROUGH FRI
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 4 FT.
FRI NIGHT
SE WINDS 5 TO 10 KT. SEAS 2 TO 4 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.
ANZ282-190000-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
704 AM EDT MON MAY 18 2026
TODAY
SE WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SW
3 FT AT 7 SECONDS AND SE 3 FT AT 8 SECONDS. PATCHY FOG THIS
MORNING WITH VSBY 1 NM OR LESS.
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: SW 3 FT AT 6 SECONDS AND
SE 2 FT AT 9 SECONDS. PATCHY FOG. VSBY 1 NM OR LESS.
TUE
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT. WAVE DETAIL: SW 5 FT AT 6 SECONDS AND SE 2 FT AT 9 SECONDS.
PATCHY FOG. VSBY 1 NM OR LESS, INCREASING TO 1 TO 3 NM IN THE
AFTERNOON.
TUE NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
5 TO 7 FT. WAVE DETAIL: SW 7 FT AT 7 SECONDS AND SE 2 FT AT
9 SECONDS. PATCHY FOG IN THE EVENING WITH VSBY 1 TO 3 NM.
WED
SW WINDS AROUND 20 KT WITH GUSTS UP TO 25 KT. SEAS 6 TO
7 FT. WAVE DETAIL: SW 6 FT AT 7 SECONDS AND SE 2 FT AT 9 SECONDS.
WED NIGHT
SW WINDS 15 TO 20 KT, BECOMING W 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. SEAS 6 TO 7 FT, SUBSIDING TO 4 TO
6 FT AFTER MIDNIGHT. WAVE DETAIL: SW 6 FT AT 7 SECONDS AND SE
2 FT AT 9 SECONDS, BECOMING SW 5 FT AT 7 SECONDS AND N 2 FT AT
2 SECONDS. A CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS
LIKELY AFTER MIDNIGHT.
THU
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. SHOWERS LIKELY.
THU NIGHT AND FRI
NE WINDS AROUND 5 KT, BECOMING E. SEAS 2 TO
4 FT.
FRI NIGHT
SE WINDS 5 TO 10 KT. SEAS 2 TO 4 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.
ANZ283-190000-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
704 AM EDT MON MAY 18 2026
TODAY
SE WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SW
3 FT AT 7 SECONDS AND SE 2 FT AT 8 SECONDS. PATCHY FOG THIS
MORNING WITH VSBY 1 NM OR LESS.
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: SW 4 FT AT 5 SECONDS AND SE 2 FT AT 9 SECONDS.
PATCHY FOG. VSBY 1 NM OR LESS.
TUE
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS 4 TO
6 FT. WAVE DETAIL: SW 5 FT AT 6 SECONDS AND SE 2 FT AT 9 SECONDS.
PATCHY FOG. VSBY 1 NM OR LESS, INCREASING TO 1 TO 3 NM IN THE
AFTERNOON.
TUE NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT. SEAS
5 TO 7 FT. WAVE DETAIL: SW 7 FT AT 6 SECONDS AND SE 4 FT AT
9 SECONDS. PATCHY FOG IN THE EVENING WITH VSBY 1 TO 3 NM.
WED
SW WINDS AROUND 20 KT WITH GUSTS UP TO 25 KT. SEAS 6 TO
7 FT. WAVE DETAIL: SW 6 FT AT 6 SECONDS AND SE 2 FT AT 9 SECONDS.
WED NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT,
BECOMING NW 10 TO 15 KT AFTER MIDNIGHT. SEAS 5 TO 7 FT, SUBSIDING
TO 4 TO 5 FT AFTER MIDNIGHT. WAVE DETAIL: SW 6 FT AT 7 SECONDS
AND SE 2 FT AT 9 SECONDS, BECOMING SW 5 FT AT 7 SECONDS AND SE
2 FT AT 9 SECONDS. A CHANCE OF SHOWERS.
THU
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. A CHANCE OF SHOWERS.
THU NIGHT AND FRI
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
FRI NIGHT
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 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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