289
FZUS51 KBOX 231705
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
105 PM EDT SUN AUG 23 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-240600-
105 PM EDT SUN AUG 23 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
WEAK LOW PRES CONTINUES MOVING N OVER THE EASTERN WATERS TODAY.
PERIODS OF SHOWERS POSSIBLE. HIGH PRES MOVES IN TONIGHT INTO MON.
THIS HIGH PRES SHOULD REMAIN OVER THE WATERS THROUGH WED. POTENTIAL
FOR LOW PRES TO RETURN LATE WEEK WITH SHOWERS POSSIBLE.
ANZ250-240600-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
105 PM EDT SUN AUG 23 2026
THIS AFTERNOON
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SE 2 FT AT 5 SECONDS AND N 1 FOOT AT 4 SECONDS. PATCHY
FOG. SHOWERS WITH ISOLATED TSTMS. SOME TSTMS MAY PRODUCE HEAVY
RAINFALL. VSBY 1 TO 3 NM.
TONIGHT
S WINDS 5 TO 10 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND E 2 FT AT
8 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM.
MON
SW WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT AT
7 SECONDS AND S 2 FT AT 4 SECONDS.
MON NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 7 SECONDS AND W
2 FT AT 3 SECONDS.
TUE
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT
AT 6 SECONDS AND W 1 FOOT AT 3 SECONDS.
TUE NIGHT
W WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SE 2 FT AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS.
WED THROUGH THU
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT.
THU NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 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.
ANZ251-240600-
MASSACHUSETTS BAY AND IPSWICH BAY-
105 PM EDT SUN AUG 23 2026
THIS AFTERNOON
E WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SE 2 FT AT 5 SECONDS AND N 1 FOOT AT 4 SECONDS. PATCHY
FOG. SHOWERS WITH ISOLATED TSTMS. SOME TSTMS MAY PRODUCE HEAVY
RAINFALL. VSBY 1 TO 3 NM.
TONIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 7 SECONDS AND N 1 FOOT AT
4 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM.
MON
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: SE
2 FT AT 6 SECONDS AND SW 1 FOOT AT 2 SECONDS.
MON NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
S 2 FT AT 3 SECONDS AND E 2 FT AT 7 SECONDS.
TUE AND TUE NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: E 2 FT AT 7 SECONDS AND W 1 FOOT AT 2 SECONDS.
WED THROUGH THU
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: E 2 FT AT 3 SECONDS AND SE 2 FT AT
3 SECONDS.
THU NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
AROUND 2 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.
ANZ231-240600-
CAPE COD BAY-
105 PM EDT SUN AUG 23 2026
THIS AFTERNOON
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 1 FOOT AT 2 SECONDS AND N 1 FOOT AT 4 SECONDS. PATCHY
FOG. SHOWERS WITH ISOLATED TSTMS. SOME TSTMS MAY PRODUCE HEAVY
RAINFALL. VSBY 1 TO 3 NM.
TONIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S
1 FOOT AT 2 SECONDS AND N 1 FOOT AT 5 SECONDS. PATCHY FOG AFTER
MIDNIGHT.
MON
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 20 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW
1 FOOT AT 2 SECONDS AND NE 1 FOOT AT 4 SECONDS.
MON 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 1 FOOT AT 3 SECONDS AND E 1 FOOT AT 7 SECONDS.
TUE AND TUE NIGHT
W WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND W 1 FOOT AT
2 SECONDS.
WED THROUGH THU
S WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND SE 2 FT
AT 13 SECONDS.
THU NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 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.
ANZ254-240600-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
105 PM EDT SUN AUG 23 2026
THIS AFTERNOON
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 2 FT AT 4 SECONDS AND E 2 FT AT 7 SECONDS. PATCHY FOG.
A CHANCE OF SHOWERS WITH ISOLATED TSTMS. SOME TSTMS MAY PRODUCE
HEAVY RAINFALL. VSBY 1 NM OR LESS.
TONIGHT
S WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: SE 3 FT AT 7 SECONDS AND W 1 FOOT AT
3 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM.
MON
SW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SE 3 FT
AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS.
MON NIGHT
SW WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL:
SE 3 FT AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS. PATCHY FOG. VSBY
1 TO 3 NM.
TUE AND TUE NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND W 2 FT AT
4 SECONDS.
WED THROUGH THU
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SE 3 FT AT 9 SECONDS AND SW 2 FT AT 4 SECONDS.
THU NIGHT
S WINDS AROUND 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.
ANZ255-240600-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
105 PM EDT SUN AUG 23 2026
THIS AFTERNOON
SW WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 2 FT AT 5 SECONDS AND NW 1 FOOT AT 4 SECONDS. SHOWERS
WITH ISOLATED TSTMS. SOME TSTMS MAY PRODUCE HEAVY RAINFALL.
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS AND SE 2 FT AT 9 SECONDS.
PATCHY FOG AFTER MIDNIGHT.
MON
SW WINDS AROUND 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SE
4 FT AT 7 SECONDS AND W 3 FT AT 3 SECONDS.
MON NIGHT
SW WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL:
SE 3 FT AT 7 SECONDS AND W 1 FOOT AT 4 SECONDS. PATCHY FOG AFTER
MIDNIGHT WITH VSBY 1 TO 3 NM.
TUE AND TUE NIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: W 4 FT AT 5 SECONDS AND SW 4 FT AT
6 SECONDS.
WED THROUGH THU
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: W 3 FT AT 4 SECONDS AND SE 2 FT AT 10 SECONDS.
THU NIGHT
SE WINDS AROUND 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.
ANZ256-240600-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
105 PM EDT SUN AUG 23 2026
THIS AFTERNOON
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SE 2 FT AT 6 SECONDS AND NW 1 FOOT AT 4 SECONDS. A SLIGHT
CHANCE OF SHOWERS WITH ISOLATED TSTMS. SOME TSTMS MAY PRODUCE
HEAVY RAINFALL.
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: E 4 FT AT 7 SECONDS AND SE 2 FT AT 12 SECONDS.
MON
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SE 4 FT
AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS.
MON NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS AROUND 3 FT. WAVE DETAIL: S 3 FT AT 6 SECONDS AND
SE 2 FT AT 11 SECONDS.
TUE AND TUE NIGHT
W WINDS 15 TO 20 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: SW 4 FT AT 5 SECONDS AND W 3 FT AT 4 SECONDS.
WED THROUGH THU
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: W 3 FT AT 4 SECONDS AND NE 3 FT AT 6 SECONDS.
THU NIGHT
SE WINDS AROUND 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.
ANZ232-240600-
NANTUCKET SOUND-
105 PM EDT SUN AUG 23 2026
THIS AFTERNOON
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 1 FOOT AT 3 SECONDS AND NW 1 FOOT AT 4 SECONDS. SHOWERS
WITH ISOLATED TSTMS. SOME TSTMS MAY PRODUCE HEAVY RAINFALL.
TONIGHT
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 E 1 FOOT AT
5 SECONDS. PATCHY FOG AFTER MIDNIGHT.
MON
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SE 2 FT AT 7 SECONDS AND SW 1 FOOT AT
2 SECONDS.
MON NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 6 SECONDS AND
W 1 FOOT AT 3 SECONDS.
TUE AND TUE NIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND W 2 FT AT
3 SECONDS.
WED THROUGH THU
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: W 2 FT AT 3 SECONDS AND SW 2 FT AT
4 SECONDS.
THU NIGHT
S WINDS AROUND 10 KT. SEAS AROUND 2 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.
ANZ233-240600-
VINEYARD SOUND-
105 PM EDT SUN AUG 23 2026
THIS AFTERNOON
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: NW 1 FOOT AT 4 SECONDS AND S 1 FOOT AT 4 SECONDS. SHOWERS
WITH ISOLATED TSTMS. SOME TSTMS MAY PRODUCE HEAVY RAINFALL.
TONIGHT
SW WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT. SEAS
AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND SW 1 FOOT AT
2 SECONDS.
MON
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND W 2 FT AT
3 SECONDS.
MON NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 6 SECONDS AND SW
2 FT AT 4 SECONDS.
TUE AND TUE NIGHT
W WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: SW 4 FT AT 5 SECONDS AND SW 3 FT AT
4 SECONDS.
WED THROUGH THU
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND E 1 FOOT
AT 6 SECONDS.
THU NIGHT
S WINDS AROUND 10 KT. SEAS AROUND 2 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.
ANZ234-240600-
BUZZARDS BAY-
105 PM EDT SUN AUG 23 2026
THIS AFTERNOON
S WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: NW 1 FOOT AT 4 SECONDS AND S 1 FOOT AT 4 SECONDS. SHOWERS
WITH ISOLATED TSTMS. SOME TSTMS MAY PRODUCE HEAVY RAINFALL.
TONIGHT
SW WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT. SEAS
AROUND 2 FT. WAVE DETAIL: SW 1 FOOT AT 3 SECONDS AND E 1 FOOT AT
5 SECONDS.
MON
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT IN THE
AFTERNOON. GUSTS UP TO 20 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW
2 FT AT 3 SECONDS AND SW 2 FT AT 5 SECONDS.
MON 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 5 SECONDS AND E 1 FOOT AT 7 SECONDS.
TUE AND TUE NIGHT
W 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 SW 3 FT AT
5 SECONDS.
WED THROUGH THU
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: NE 2 FT AT 4 SECONDS AND SW 2 FT AT
5 SECONDS.
THU NIGHT
S WINDS 10 TO 15 KT. SEAS AROUND 2 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.
ANZ235-240600-
RHODE ISLAND SOUND-
105 PM EDT SUN AUG 23 2026
THIS AFTERNOON
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 5 SECONDS AND NW 1 FOOT AT 4 SECONDS. SHOWERS
WITH ISOLATED TSTMS. SOME TSTMS MAY PRODUCE HEAVY RAINFALL.
TONIGHT
SW WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT AFTER
MIDNIGHT. GUSTS UP TO 20 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT
AT 4 SECONDS AND SE 2 FT AT 9 SECONDS.
MON
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SE
3 FT AT 7 SECONDS AND W 2 FT AT 3 SECONDS.
MON NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL:
SE 3 FT AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS.
TUE AND TUE NIGHT
W 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 W 2 FT AT
4 SECONDS.
WED THROUGH THU
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND NE 2 FT AT
5 SECONDS.
THU NIGHT
S 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.
ANZ237-240600-
BLOCK ISLAND SOUND-
105 PM EDT SUN AUG 23 2026
THIS AFTERNOON
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: NW 1 FOOT AT 4 SECONDS AND S 1 FOOT AT 4 SECONDS. A
SLIGHT CHANCE OF SHOWERS WITH ISOLATED TSTMS. SOME TSTMS MAY
PRODUCE HEAVY RAINFALL.
TONIGHT
SW WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SE 3 FT AT 6 SECONDS AND W 1 FOOT AT
3 SECONDS.
MON
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SE
3 FT AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS.
MON NIGHT
SW WINDS 10 TO 15 KT, BECOMING W 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 7 SECONDS AND W
1 FOOT AT 3 SECONDS.
TUE
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: W 2 FT AT 4 SECONDS AND SE 2 FT AT 7 SECONDS.
TUE NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
DIMINISHING TO 5 TO 10 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE
DETAIL: W 2 FT AT 3 SECONDS AND SE 2 FT AT 7 SECONDS.
WED THROUGH THU
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
THU NIGHT
S 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.
ANZ230-240600-
BOSTON HARBOR-
105 PM EDT SUN AUG 23 2026
THIS AFTERNOON
E WINDS AROUND 5 KT. WAVES 1 FOOT OR LESS.
PATCHY FOG. SHOWERS WITH ISOLATED TSTMS. SOME TSTMS MAY PRODUCE
HEAVY RAINFALL.
TONIGHT
S WINDS AROUND 5 KT. WAVES AROUND 2 FT IN THE EVENING,
THEN 1 FOOT OR LESS. PATCHY FOG AFTER MIDNIGHT.
MON
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES AROUND 2 FT.
MON NIGHT
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT IN THE
EVENING, THEN 1 FOOT OR LESS.
TUE AND TUE NIGHT
W WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
WED THROUGH THU
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
WAVES AROUND 2 FT.
THU NIGHT
S WINDS 10 TO 15 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS.
WINDS AND WAVES 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.
ANZ236-240600-
NARRAGANSETT BAY-
105 PM EDT SUN AUG 23 2026
THIS AFTERNOON
S WINDS 5 TO 10 KT. WAVES AROUND 2 FT. SHOWERS
WITH ISOLATED TSTMS. SOME TSTMS MAY PRODUCE HEAVY RAINFALL.
TONIGHT
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
MON
SW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. WAVES 2 TO 3 FT.
MON NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE
EVENING. WAVES AROUND 2 FT.
TUE
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES 2 TO
3 FT.
TUE NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
DIMINISHING TO 5 TO 10 KT AFTER MIDNIGHT. WAVES AROUND 2 FT.
WED THROUGH THU
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
WAVES AROUND 2 FT.
THU NIGHT
S WINDS 5 TO 10 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS.
WINDS AND WAVES 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.
ANZ280-240600-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
105 PM EDT SUN AUG 23 2026
THIS AFTERNOON
SE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: E 2 FT AT 7 SECONDS AND S 1 FOOT AT 4 SECONDS. PATCHY
FOG. A CHANCE OF SHOWERS WITH ISOLATED TSTMS. SOME TSTMS MAY
PRODUCE HEAVY RAINFALL. VSBY 1 NM OR LESS.
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE EVENING.
SEAS 2 TO 4 FT. WAVE DETAIL: SE 3 FT AT 9 SECONDS AND S 2 FT AT
4 SECONDS. PATCHY FOG. VSBY 1 NM OR LESS.
MON
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
SEAS 3 TO 4 FT. WAVE DETAIL: SE 3 FT AT 7 SECONDS AND SW 1 FOOT
AT 3 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 TO 3 NM.
MON NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 3 TO 4 FT. WAVE DETAIL: SE 3 FT AT 7 SECONDS AND SW
1 FOOT AT 3 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM.
TUE AND TUE NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: W 2 FT AT 4 SECONDS AND SE 2 FT AT
7 SECONDS.
WED THROUGH THU
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SE 3 FT AT 9 SECONDS AND E 2 FT AT 3 SECONDS.
THU NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 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.
ANZ281-240600-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
105 PM EDT SUN AUG 23 2026
THIS AFTERNOON
S WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 3 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND E 2 FT AT
7 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS WITH ISOLATED TSTMS.
SOME TSTMS MAY PRODUCE HEAVY RAINFALL. VSBY 1 NM OR LESS.
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: SE 4 FT AT 7 SECONDS AND N 1 FOOT AT
4 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS AFTER MIDNIGHT. VSBY
1 NM OR LESS.
MON
SW WINDS AROUND 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SE
4 FT AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS. PATCHY FOG. VSBY
1 NM OR LESS, INCREASING TO 1 TO 3 NM IN THE AFTERNOON.
MON NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 3 FT. WAVE DETAIL:
SE 3 FT AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS. PATCHY FOG. VSBY
1 TO 3 NM.
TUE
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
4 FT. WAVE DETAIL: SW 3 FT AT 6 SECONDS AND W 2 FT AT 4 SECONDS.
PATCHY FOG IN THE MORNING.
TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 4 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND W 2 FT AT
5 SECONDS.
WED THROUGH THU
S WINDS 5 TO 10 KT. SEAS 3 TO 4 FT.
THU NIGHT
SE WINDS AROUND 10 KT. SEAS AROUND 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.
ANZ282-240600-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
105 PM EDT SUN AUG 23 2026
THIS AFTERNOON
SW WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: S 3 FT AT 5 SECONDS AND SE 2 FT AT
12 SECONDS. SHOWERS WITH ISOLATED TSTMS. SOME TSTMS MAY PRODUCE
HEAVY RAINFALL.
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
5 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS AND SE 3 FT AT 8 SECONDS.
PATCHY FOG. A CHANCE OF SHOWERS AFTER MIDNIGHT. VSBY 1 TO 3 NM.
MON
SW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SE 4 FT
AT 7 SECONDS AND SE 2 FT AT 11 SECONDS.
MON NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 3 FT. WAVE DETAIL:
SW 3 FT AT 6 SECONDS AND SE 2 FT AT 11 SECONDS. PATCHY FOG. VSBY
1 TO 3 NM.
TUE AND TUE NIGHT
W 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 W 4 FT AT
5 SECONDS.
WED THROUGH THU
S WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: W 3 FT AT 5 SECONDS AND SE 3 FT AT 10 SECONDS.
THU NIGHT
SE WINDS AROUND 10 KT. SEAS 3 TO 4 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.
ANZ283-240600-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
105 PM EDT SUN AUG 23 2026
THIS AFTERNOON
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 3 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND E 1 FOOT
AT 6 SECONDS. A SLIGHT CHANCE OF SHOWERS WITH ISOLATED TSTMS.
SOME TSTMS MAY PRODUCE HEAVY RAINFALL.
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS AND E 3 FT AT 9 SECONDS.
MON
SW WINDS AROUND 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT
AT 6 SECONDS AND SE 3 FT AT 10 SECONDS.
MON NIGHT
SW WINDS AROUND 10 KT. SEAS AROUND 3 FT. WAVE
DETAIL: S 3 FT AT 6 SECONDS AND W 2 FT AT 4 SECONDS.
TUE AND TUE NIGHT
W WINDS 15 TO 20 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: W 4 FT AT 5 SECONDS AND SW 4 FT AT 6 SECONDS.
WED THROUGH THU
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: W 3 FT AT 5 SECONDS AND SE 3 FT AT 9 SECONDS.
THU NIGHT
SE WINDS AROUND 10 KT. SEAS AROUND 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.
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