113
FZUS51 KBOX 172303
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
703 PM EDT MON AUG 17 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-181200-
703 PM EDT MON AUG 17 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
AN AREA OF LOW-PRESSURE MOVES OVER THE SOUTH COASTAL WATERS THIS
AFTERNOON AND CONTINUES TO SUPPORT MARGINAL SCY CONDITIONS OVER THE
SOUTH COASTAL WATERS. THIS SYSTEM MOVES EAST OF THE WATERS OVERNIGHT
WITH DIMINSING WINDS AND SUBSIDING SEAS. WINDS BECOME LIGHT OUT OF
THE NORTH/NORTHEAST ON TUESDAY WITH SEAS UP TO 3 FEET OVER THE OUTER
MARINE ZONES.
ANZ250-181200-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
703 PM EDT MON AUG 17 2026
TONIGHT
SE WINDS 5 TO 10 KT, BECOMING E AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 4 SECONDS AND SE 1 FOOT AT
10 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS, MAINLY THIS EVENING.
VSBY 1 TO 3 NM, DECREASING TO 1 NM OR LESS AFTER MIDNIGHT.
TUE
N WINDS AROUND 5 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE 3 FT
AT 9 SECONDS AND SW 2 FT AT 6 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 NM OR LESS.
TUE NIGHT
N WINDS AROUND 5 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE
4 FT AT 9 SECONDS AND W 2 FT AT 7 SECONDS. PATCHY FOG. VSBY 1 NM
OR LESS.
WED
W WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 8 SECONDS AND SW 2 FT AT
7 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 NM OR LESS.
WED NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
3 FT AT 7 SECONDS AND S 2 FT AT 4 SECONDS.
THU AND THU NIGHT
NW WINDS AROUND 5 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SE 2 FT AT 8 SECONDS AND SW 1 FOOT AT 3 SECONDS.
FRI AND FRI NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
SAT AND SAT NIGHT
E 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.
ANZ251-181200-
MASSACHUSETTS BAY AND IPSWICH BAY-
703 PM EDT MON AUG 17 2026
TONIGHT
SE WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT. SEAS
AROUND 2 FT THIS EVENING, THEN 1 FOOT OR LESS. WAVE DETAIL: SE
2 FT AT 4 SECONDS AND E 1 FOOT AT 8 SECONDS, BECOMING SE 1 FOOT
AT 4 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS, MAINLY THIS
EVENING. VSBY 1 TO 3 NM, DECREASING TO 1 NM OR LESS AFTER
MIDNIGHT.
TUE
N WINDS AROUND 5 KT. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT
IN THE AFTERNOON. WAVE DETAIL: SE 1 FOOT AT 4 SECONDS, BECOMING
SE 2 FT AT 7 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 NM OR
LESS.
TUE NIGHT
NE WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT AT 9 SECONDS AND N 1 FOOT AT
2 SECONDS. PATCHY FOG AFTER MIDNIGHT WITH VSBY 1 TO 3 NM.
WED
W WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 7 SECONDS AND E 2 FT AT
8 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 TO 3 NM.
WED NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 2 FT AT 7 SECONDS AND S 1 FOOT AT 3 SECONDS.
THU AND THU NIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: E 2 FT AT 7 SECONDS AND SW 1 FOOT AT 2 SECONDS.
FRI AND FRI NIGHT
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
SAT AND SAT NIGHT
E 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.
ANZ231-181200-
CAPE COD BAY-
703 PM EDT MON AUG 17 2026
TONIGHT
SE WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT. SEAS
AROUND 2 FT THIS EVENING, THEN 1 FOOT OR LESS. WAVE DETAIL: SE
1 FOOT AT 2 SECONDS AND SE 1 FOOT AT 7 SECONDS, BECOMING SE
1 FOOT AT 3 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS, MAINLY THIS
EVENING. VSBY 1 TO 3 NM, DECREASING TO 1 NM OR LESS AFTER
MIDNIGHT.
TUE
N WINDS AROUND 5 KT. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT
IN THE AFTERNOON. WAVE DETAIL: E 1 FOOT AT 2 SECONDS AND S 1 FOOT
AT 5 SECONDS, BECOMING SW 1 FOOT AT 2 SECONDS AND NE 1 FOOT AT
3 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 NM OR LESS.
TUE NIGHT
N WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL:
W 1 FOOT AT 2 SECONDS AND NE 1 FOOT AT 4 SECONDS. PATCHY FOG
AFTER MIDNIGHT WITH VSBY 1 NM OR LESS.
WED
W WINDS AROUND 5 KT, BECOMING S IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: SW 1 FOOT AT 2 SECONDS AND E 1 FOOT AT
5 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 TO 3 NM.
WED NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 1 FOOT AT 2 SECONDS AND E 1 FOOT AT 4 SECONDS.
THU AND THU NIGHT
NW WINDS AROUND 5 KT. SEAS 1 FOOT OR LESS.
WAVE DETAIL: W 1 FOOT AT 2 SECONDS AND E 1 FOOT AT 6 SECONDS. A
CHANCE OF SHOWERS.
FRI THROUGH SAT NIGHT
E 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.
ANZ254-181200-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
703 PM EDT MON AUG 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT TUESDAY
TONIGHT
SE WINDS 10 TO 15 KT, BECOMING E 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT AT 6 SECONDS AND SE
1 FOOT AT 10 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS, MAINLY
THIS EVENING. VSBY 1 NM OR LESS.
TUE
N WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE 4 FT
AT 9 SECONDS AND S 3 FT AT 7 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 NM OR LESS.
TUE NIGHT
NW WINDS AROUND 5 KT. SEAS 2 TO 4 FT. WAVE DETAIL:
SE 4 FT AT 8 SECONDS AND SW 2 FT AT 7 SECONDS. PATCHY FOG. VSBY
1 NM OR LESS.
WED
W WINDS AROUND 5 KT, BECOMING SW IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 8 SECONDS AND S 2 FT AT
7 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 NM OR LESS.
WED NIGHT AND THU
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SE 3 FT AT 7 SECONDS AND SW 1 FOOT AT 5 SECONDS.
THU NIGHT
SW WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 8 SECONDS AND SW 1 FOOT AT
4 SECONDS. A CHANCE OF SHOWERS.
FRI THROUGH SAT 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.
ANZ255-181200-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
703 PM EDT MON AUG 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT TUESDAY
TONIGHT
SE WINDS 10 TO 15 KT, BECOMING NE 5 TO 10 KT AFTER
MIDNIGHT. SEAS 3 TO 5 FT. WAVE DETAIL: S 4 FT AT 7 SECONDS AND SE
1 FOOT AT 9 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS THIS
EVENING. VSBY 1 NM OR LESS.
TUE
N WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT AT
7 SECONDS AND E 2 FT AT 8 SECONDS. PATCHY FOG IN THE MORNING WITH
VSBY 1 NM OR LESS.
TUE NIGHT
NW WINDS AROUND 5 KT. SEAS 2 TO 4 FT. WAVE DETAIL: S
3 FT AT 7 SECONDS AND SE 3 FT AT 8 SECONDS. PATCHY FOG. VSBY 1 NM
OR LESS.
WED
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT
AT 7 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 NM OR LESS.
WED NIGHT AND THU
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SW 2 FT AT 6 SECONDS AND E 2 FT AT 7 SECONDS.
THU NIGHT
SW WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 8 SECONDS AND SW 1 FOOT
AT 5 SECONDS. A CHANCE OF SHOWERS AND TSTMS.
FRI THROUGH SAT NIGHT
SE WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A
CHANCE OF SHOWERS.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ256-181200-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
703 PM EDT MON AUG 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT TUESDAY
TONIGHT
E WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
3 TO 5 FT. WAVE DETAIL: SE 4 FT AT 7 SECONDS. PATCHY FOG. A
SLIGHT CHANCE OF SHOWERS THIS EVENING. VSBY 1 TO 3 NM, DECREASING
TO 1 NM OR LESS AFTER MIDNIGHT.
TUE
NW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT
AT 7 SECONDS AND E 3 FT AT 9 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 NM OR LESS.
TUE NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 3 FT. WAVE DETAIL: S
3 FT AT 7 SECONDS AND SE 2 FT AT 8 SECONDS. PATCHY FOG AFTER
MIDNIGHT WITH VSBY 1 NM OR LESS.
WED
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT
7 SECONDS AND SE 2 FT AT 8 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 NM OR LESS.
WED NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
2 FT AT 6 SECONDS.
THU
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT
AT 6 SECONDS AND E 2 FT AT 7 SECONDS. A CHANCE OF SHOWERS IN THE
AFTERNOON.
THU NIGHT
SW WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
SEAS AROUND 2 FT. A CHANCE OF SHOWERS. A CHANCE OF TSTMS AFTER
MIDNIGHT.
FRI THROUGH SAT NIGHT
E WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A
CHANCE OF SHOWERS.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ232-181200-
NANTUCKET SOUND-
703 PM EDT MON AUG 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
TONIGHT
SE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
NE 5 TO 10 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
2 FT AT 6 SECONDS AND SE 1 FOOT AT 10 SECONDS. PATCHY FOG. A
SLIGHT CHANCE OF SHOWERS. VSBY 1 TO 3 NM, DECREASING TO 1 NM OR
LESS AFTER MIDNIGHT.
TUE
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NE 1 FOOT
AT 4 SECONDS AND SW 1 FOOT AT 6 SECONDS. PATCHY FOG IN THE
MORNING WITH VSBY 1 NM OR LESS.
TUE NIGHT
NW WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 1 FOOT AT 6 SECONDS AND E 1 FOOT AT 8 SECONDS. PATCHY FOG.
VSBY 1 TO 3 NM.
WED
W WINDS AROUND 5 KT, BECOMING SW 10 TO 15 KT IN THE
AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 6 SECONDS
AND E 1 FOOT AT 8 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY
1 NM OR LESS.
WED NIGHT
SW WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT
AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT
3 SECONDS AND E 1 FOOT AT 7 SECONDS.
THU AND THU NIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: W 1 FOOT AT 4 SECONDS AND E 1 FOOT AT 7 SECONDS. A CHANCE
OF SHOWERS.
FRI THROUGH SAT NIGHT
E WINDS 10 TO 15 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.
ANZ233-181200-
VINEYARD SOUND-
703 PM EDT MON AUG 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
TONIGHT
E WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 6 SECONDS. PATCHY FOG. A
CHANCE OF SHOWERS THIS EVENING. VSBY 1 TO 3 NM, DECREASING TO
1 NM OR LESS AFTER MIDNIGHT.
TUE
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT
AT 6 SECONDS AND N 1 FOOT AT 3 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 NM OR LESS.
TUE NIGHT
NE WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 6 SECONDS AND NE 1 FOOT
AT 6 SECONDS. PATCHY FOG AFTER MIDNIGHT WITH VSBY 1 NM OR LESS.
WED
W WINDS AROUND 5 KT, BECOMING SW 10 TO 15 KT IN THE
AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS
AND SE 1 FOOT AT 9 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY
1 NM OR LESS.
WED NIGHT
SW WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT
AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT
4 SECONDS AND SE 1 FOOT AT 9 SECONDS.
THU AND THU NIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SW 1 FOOT AT 5 SECONDS AND SE 1 FOOT AT 8 SECONDS. A
CHANCE OF SHOWERS.
FRI THROUGH SAT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A CHANCE
OF SHOWERS.
SAT NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. SHOWERS
LIKELY.
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.
ANZ234-181200-
BUZZARDS BAY-
703 PM EDT MON AUG 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
TONIGHT
E WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 9 SECONDS AND S 2 FT AT
6 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS THIS EVENING. VSBY
1 TO 3 NM, DECREASING TO 1 NM OR LESS AFTER MIDNIGHT.
TUE
N WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL: NE
1 FOOT AT 2 SECONDS AND SW 1 FOOT AT 6 SECONDS. PATCHY FOG IN THE
MORNING WITH VSBY 1 NM OR LESS.
TUE NIGHT
N WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 1 FOOT AT 3 SECONDS AND SW 1 FOOT AT 6 SECONDS. PATCHY FOG
AFTER MIDNIGHT WITH VSBY 1 NM OR LESS.
WED
W WINDS AROUND 5 KT, BECOMING SW 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: SW
1 FOOT AT 5 SECONDS AND SE 1 FOOT AT 8 SECONDS. PATCHY FOG IN THE
MORNING WITH VSBY 1 NM OR LESS.
WED NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
DIMINISHING TO 5 TO 10 KT AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE
DETAIL: SW 2 FT AT 4 SECONDS AND SE 1 FOOT AT 10 SECONDS.
THU AND THU NIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SW 1 FOOT AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS. A
CHANCE OF SHOWERS.
FRI THROUGH SAT NIGHT
E 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.
ANZ235-181200-
RHODE ISLAND SOUND-
703 PM EDT MON AUG 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
TONIGHT
E WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
2 TO 4 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS. PATCHY FOG. A CHANCE
OF SHOWERS THIS EVENING. VSBY 1 TO 3 NM, DECREASING TO 1 NM OR
LESS AFTER MIDNIGHT.
TUE
N WINDS 5 TO 10 KT, BECOMING NW IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 7 SECONDS. PATCHY FOG IN THE
MORNING WITH VSBY 1 NM OR LESS.
TUE NIGHT
SW WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND SE 2 FT AT
8 SECONDS. PATCHY FOG AFTER MIDNIGHT WITH VSBY 1 NM OR LESS.
WED
W WINDS AROUND 5 KT, BECOMING SW 10 TO 15 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS AND
SE 2 FT AT 8 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 NM OR
LESS.
WED NIGHT
SW WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT
AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS
AND SE 2 FT AT 8 SECONDS.
THU AND THU NIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 7 SECONDS. A CHANCE OF SHOWERS.
FRI THROUGH SAT NIGHT
E WINDS 10 TO 15 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.
ANZ237-181200-
BLOCK ISLAND SOUND-
703 PM EDT MON AUG 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
TONIGHT
NE WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
2 TO 4 FT. WAVE DETAIL: SE 3 FT AT 6 SECONDS. PATCHY FOG. A
SLIGHT CHANCE OF SHOWERS THIS EVENING. VSBY 1 TO 3 NM, DECREASING
TO 1 NM OR LESS AFTER MIDNIGHT.
TUE
N WINDS AROUND 5 KT, BECOMING SW IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND SE 2 FT AT
8 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 NM OR LESS.
TUE NIGHT
SW WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND SE 2 FT AT
8 SECONDS. PATCHY FOG AFTER MIDNIGHT.
WED
NW WINDS AROUND 5 KT, BECOMING SW IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS AND SE 2 FT AT
8 SECONDS. PATCHY FOG IN THE MORNING.
WED NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 2 FT AT 5 SECONDS AND SE 2 FT AT 8 SECONDS.
THU AND THU NIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SW 2 FT AT 6 SECONDS AND SE 2 FT AT 8 SECONDS. A CHANCE
OF SHOWERS.
FRI THROUGH SAT NIGHT
E 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.
ANZ230-181200-
BOSTON HARBOR-
703 PM EDT MON AUG 17 2026
TONIGHT
SE WINDS AROUND 5 KT, BECOMING NE AROUND 5 KT AFTER
MIDNIGHT. WAVES 1 FOOT OR LESS. PATCHY FOG. A CHANCE OF SHOWERS,
MAINLY THIS EVENING. VSBY 1 TO 3 NM, DECREASING TO 1 NM OR LESS
AFTER MIDNIGHT.
TUE
NE WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS. PATCHY FOG IN
THE MORNING WITH VSBY 1 NM OR LESS.
TUE NIGHT
E WINDS AROUND 5 KT, BECOMING N AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS. PATCHY FOG AFTER MIDNIGHT.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS. PATCHY FOG IN
THE MORNING.
WED NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
THU AND THU NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
FRI AND FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
SAT AND SAT NIGHT
E 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.
ANZ236-181200-
NARRAGANSETT BAY-
703 PM EDT MON AUG 17 2026
TONIGHT
NE WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. WAVES
2 TO 3 FT. PATCHY FOG. A CHANCE OF SHOWERS THIS EVENING. VSBY
1 TO 3 NM, DECREASING TO 1 NM OR LESS AFTER MIDNIGHT.
TUE
N WINDS AROUND 5 KT. WAVES AROUND 2 FT. PATCHY FOG IN THE
MORNING WITH VSBY 1 NM OR LESS.
TUE NIGHT
S WINDS AROUND 5 KT, BECOMING NW AROUND 5 KT AFTER
MIDNIGHT. WAVES AROUND 2 FT. PATCHY FOG AFTER MIDNIGHT WITH VSBY
1 TO 3 NM.
WED
W WINDS AROUND 5 KT, BECOMING SW IN THE AFTERNOON. WAVES
AROUND 2 FT. PATCHY FOG IN THE MORNING.
WED NIGHT
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
THU AND THU NIGHT
NW WINDS 5 TO 10 KT. WAVES AROUND 2 FT. A
CHANCE OF SHOWERS.
FRI THROUGH SAT NIGHT
E 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.
ANZ280-181200-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
703 PM EDT MON AUG 17 2026
TONIGHT
SE WINDS AROUND 10 KT, BECOMING E AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 4 SECONDS AND SE 1 FOOT AT
9 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM,
DECREASING TO 1 NM OR LESS AFTER MIDNIGHT.
TUE
NE WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SE 5 FT
AT 9 SECONDS AND SE 3 FT AT 6 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 NM OR LESS.
TUE NIGHT
N WINDS AROUND 5 KT. SEAS 4 TO 5 FT. WAVE DETAIL: SE
5 FT AT 9 SECONDS AND SW 2 FT AT 7 SECONDS. PATCHY FOG. VSBY 1 NM
OR LESS.
WED
W WINDS AROUND 5 KT, BECOMING SW IN THE AFTERNOON. SEAS
3 TO 4 FT. WAVE DETAIL: SE 4 FT AT 8 SECONDS AND S 2 FT AT
8 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 NM OR LESS.
WED NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
AROUND 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS.
THU AND THU NIGHT
NW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SW 2 FT AT 6 SECONDS AND SE 2 FT AT 8 SECONDS.
FRI AND FRI NIGHT
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
SAT AND SAT NIGHT
E 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.
ANZ281-181200-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
703 PM EDT MON AUG 17 2026
TONIGHT
SE WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT AFTER
MIDNIGHT. SEAS 4 TO 6 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS AND SE
1 FOOT AT 10 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS. A SLIGHT
CHANCE OF TSTMS THIS EVENING. VSBY 1 NM OR LESS.
TUE
N WINDS 5 TO 10 KT. SEAS 4 TO 6 FT. WAVE DETAIL: SE 5 FT
AT 8 SECONDS AND S 4 FT AT 7 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 NM OR LESS.
TUE NIGHT
NW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SE
5 FT AT 8 SECONDS AND SW 3 FT AT 7 SECONDS. PATCHY FOG. VSBY 1 NM
OR LESS.
WED
SW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S 3 FT
AT 7 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 NM OR LESS.
WED NIGHT AND THU
SW WINDS 5 TO 10 KT. SEAS AROUND 3 FT. WAVE
DETAIL: S 3 FT AT 7 SECONDS.
THU NIGHT
SW WINDS AROUND 5 KT. SEAS AROUND 3 FT. WAVE DETAIL:
SE 2 FT AT 9 SECONDS AND SW 1 FOOT AT 5 SECONDS. A CHANCE OF
SHOWERS.
FRI THROUGH SAT NIGHT
SE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. A
CHANCE OF SHOWERS.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ282-181200-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
703 PM EDT MON AUG 17 2026
TONIGHT
SE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT, BECOMING
W 5 TO 10 KT AFTER MIDNIGHT. SEAS 4 TO 6 FT. WAVE DETAIL: S 5 FT
AT 6 SECONDS AND E 2 FT AT 9 SECONDS. PATCHY FOG. A CHANCE OF
SHOWERS WITH A SLIGHT CHANCE OF TSTMS THIS EVENING, THEN A SLIGHT
CHANCE OF SHOWERS AFTER MIDNIGHT. VSBY 1 NM OR LESS.
TUE
NW WINDS 5 TO 10 KT. SEAS 4 TO 5 FT. WAVE DETAIL: S 4 FT
AT 7 SECONDS AND E 3 FT AT 8 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 NM OR LESS.
TUE NIGHT
NW WINDS AROUND 5 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S
3 FT AT 7 SECONDS AND SE 3 FT AT 8 SECONDS. PATCHY FOG AFTER
MIDNIGHT WITH VSBY 1 NM OR LESS.
WED
SW WINDS 5 TO 10 KT. SEAS AROUND 3 FT. WAVE DETAIL: SE
3 FT AT 8 SECONDS AND S 2 FT AT 7 SECONDS. PATCHY FOG IN THE
MORNING WITH VSBY 1 NM OR LESS.
WED NIGHT AND THU
SW WINDS 5 TO 10 KT. SEAS AROUND 3 FT. WAVE
DETAIL: S 2 FT AT 7 SECONDS.
THU NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
2 FT AT 9 SECONDS AND SW 1 FOOT AT 4 SECONDS. A CHANCE OF SHOWERS
AND TSTMS.
FRI
NE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
FRI NIGHT
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS.
SAT AND SAT NIGHT
E WINDS AROUND 10 KT, BECOMING S. SEAS 2 TO
4 FT. SHOWERS LIKELY.
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.
ANZ283-181200-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
703 PM EDT MON AUG 17 2026
TONIGHT
S WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
4 TO 6 FT. WAVE DETAIL: S 5 FT AT 6 SECONDS AND NE 2 FT AT
7 SECONDS. PATCHY FOG. A SLIGHT CHANCE OF SHOWERS AND TSTMS THIS
EVENING. VSBY 1 TO 3 NM, DECREASING TO 1 NM OR LESS AFTER
MIDNIGHT.
TUE
NW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT
AT 7 SECONDS AND NE 2 FT AT 5 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 NM OR LESS.
TUE NIGHT
W WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S
3 FT AT 7 SECONDS AND SE 2 FT AT 9 SECONDS. PATCHY FOG AFTER
MIDNIGHT WITH VSBY 1 NM OR LESS.
WED
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT
AT 7 SECONDS AND SE 2 FT AT 8 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 TO 3 NM.
WED NIGHT AND THU
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 2 FT AT 7 SECONDS.
THU NIGHT
SW WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 9 SECONDS AND SW 1 FOOT
AT 4 SECONDS. A CHANCE OF SHOWERS AND TSTMS.
FRI THROUGH SAT
E WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A CHANCE
OF SHOWERS.
SAT NIGHT
SE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. SHOWERS
LIKELY.
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.
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