410
FZUS51 KBOX 200205
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1005 PM EDT WED AUG 19 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-201500-
1005 PM EDT WED AUG 19 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
WEAK HIGH PRES WILL BE OFFSHORE BY LATE TODAY. A WEAK TROUGH OF LOW
PRES MOVES THROUGH THU, FOLLOWED BY YET ANOTHER HIGH PRES SYSTEM FOR
FRI. UNSETTLED CONDITIONS RETURN OVER THE WEEKEND WITH ARRIVAL OF
ANOTHER LOW PRES.
ANZ250-201500-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
1005 PM EDT WED AUG 19 2026
OVERNIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
3 FT AT 6 SECONDS AND S 2 FT AT 3 SECONDS.
THU
W WINDS 5 TO 10 KT, DIMINISHING TO AROUND 5 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 7 SECONDS AND
SW 1 FOOT AT 3 SECONDS.
THU NIGHT
SW WINDS AROUND 5 KT, BECOMING N AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 8 SECONDS AND E 1 FOOT
AT 3 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
FRI
NE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NW 2 FT
AT 4 SECONDS AND E 2 FT AT 8 SECONDS.
FRI NIGHT AND SAT
E 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 S 2 FT AT
7 SECONDS. A CHANCE OF SHOWERS.
SAT NIGHT
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
3 FT AT 6 SECONDS AND SE 1 FOOT AT 13 SECONDS. SHOWERS LIKELY.
SUN AND SUN NIGHT
SE WINDS 5 TO 10 KT, BECOMING SW. SEAS 2 TO
3 FT. A CHANCE OF SHOWERS.
MON AND MON NIGHT
W WINDS 5 TO 10 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.
ANZ251-201500-
MASSACHUSETTS BAY AND IPSWICH BAY-
1005 PM EDT WED AUG 19 2026
OVERNIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 2 FT AT 7 SECONDS AND SW 1 FOOT AT 2 SECONDS.
THU
W WINDS AROUND 5 KT, BECOMING E IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: E 2 FT AT 7 SECONDS AND SW 1 FOOT AT
2 SECONDS.
THU NIGHT
SW WINDS AROUND 5 KT, BECOMING N AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: E 2 FT AT 8 SECONDS AND E 1 FOOT
AT 3 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
FRI
NE WINDS 5 TO 10 KT, BECOMING E IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: N 2 FT AT 4 SECONDS AND E 2 FT AT
8 SECONDS.
FRI NIGHT AND SAT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: NE 2 FT AT 3 SECONDS AND E 2 FT AT 8 SECONDS. A CHANCE OF
SHOWERS.
SAT NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SE 2 FT AT 4 SECONDS AND E 2 FT AT 7 SECONDS. SHOWERS LIKELY IN
THE EVENING. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SUN AND SUN NIGHT
SE WINDS 5 TO 10 KT, BECOMING SW. SEAS
AROUND 2 FT. A CHANCE OF SHOWERS.
MON AND MON 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.
ANZ231-201500-
CAPE COD BAY-
1005 PM EDT WED AUG 19 2026
OVERNIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT, THEN 1 FOOT
OR LESS. WAVE DETAIL: SW 1 FOOT AT 3 SECONDS AND E 1 FOOT AT
4 SECONDS, BECOMING SW 1 FOOT AT 2 SECONDS AND S 1 FOOT AT
3 SECONDS.
THU
W WINDS AROUND 5 KT, BECOMING N IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: W 1 FOOT AT 2 SECONDS AND S 1 FOOT
AT 6 SECONDS.
THU NIGHT
W WINDS AROUND 5 KT, BECOMING NW AROUND 5 KT AFTER
MIDNIGHT. SEAS 1 FOOT OR LESS. WAVE DETAIL: E 1 FOOT AT 2 SECONDS
AND SW 1 FOOT AT 2 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
FRI
NE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT
IN THE AFTERNOON. WAVE DETAIL: N 1 FOOT AT 2 SECONDS AND SW
1 FOOT AT 4 SECONDS, BECOMING N 1 FOOT AT 3 SECONDS AND SE 1 FOOT
AT 5 SECONDS.
FRI NIGHT AND SAT
E WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: E 2 FT AT 3 SECONDS AND N 1 FOOT
AT 3 SECONDS. A CHANCE OF SHOWERS.
SAT NIGHT
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 2 FT AT 8 SECONDS AND E 1 FOOT AT 3 SECONDS. SHOWERS LIKELY.
SUN
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A CHANCE OF SHOWERS.
SUN NIGHT THROUGH MON 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.
ANZ254-201500-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
1005 PM EDT WED AUG 19 2026
OVERNIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
2 FT AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS. PATCHY FOG WITH VSBY
1 TO 3 NM.
THU
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT
AT 8 SECONDS AND W 1 FOOT AT 3 SECONDS. PATCHY FOG. VSBY 1 TO
3 NM, DECREASING TO 1 NM OR LESS IN THE AFTERNOON.
THU NIGHT
SW WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 8 SECONDS AND SW 1 FOOT
AT 3 SECONDS. PATCHY FOG. SHOWERS LIKELY IN THE EVENING. A CHANCE
OF SHOWERS AND TSTMS AFTER MIDNIGHT. VSBY 1 NM OR LESS.
FRI
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: E 2 FT
AT 8 SECONDS AND N 1 FOOT AT 3 SECONDS. A CHANCE OF SHOWERS IN
THE MORNING.
FRI NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
NE 2 FT AT 4 SECONDS AND E 2 FT AT 8 SECONDS. A CHANCE OF
SHOWERS.
SAT AND SAT NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 5 SECONDS AND E 3 FT AT
8 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS
LIKELY.
SUN
S WINDS AROUND 10 KT. SEAS 2 TO 3 FT. SHOWERS LIKELY.
SUN NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS.
MON AND MON NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT.
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.
ANZ255-201500-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
1005 PM EDT WED AUG 19 2026
OVERNIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
S 2 FT AT 7 SECONDS AND SW 1 FOOT AT 3 SECONDS. PATCHY FOG WITH
VSBY 1 TO 3 NM.
THU
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
2 FT AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS. PATCHY FOG. VSBY
1 TO 3 NM, DECREASING TO 1 NM OR LESS IN THE AFTERNOON.
THU NIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 8 SECONDS AND SW 1 FOOT AT
3 SECONDS. PATCHY FOG. SHOWERS LIKELY IN THE EVENING. A CHANCE OF
SHOWERS AND TSTMS AFTER MIDNIGHT. VSBY 1 NM OR LESS.
FRI
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: E 2 FT
AT 3 SECONDS AND SE 2 FT AT 8 SECONDS. A CHANCE OF SHOWERS.
FRI NIGHT
E WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 2 FT AT 3 SECONDS AND E 2 FT AT 8 SECONDS. A CHANCE OF SHOWERS.
SAT AND SAT NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 5 SECONDS AND E 2 FT AT
8 SECONDS. SHOWERS LIKELY.
SUN
S WINDS AROUND 10 KT. SEAS 2 TO 4 FT. SHOWERS LIKELY.
SUN NIGHT
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. A CHANCE OF
SHOWERS.
MON AND MON NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 4 FT.
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.
ANZ256-201500-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
1005 PM EDT WED AUG 19 2026
OVERNIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
2 FT AT 7 SECONDS AND SW 1 FOOT AT 2 SECONDS.
THU
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT
AT 8 SECONDS AND W 1 FOOT AT 3 SECONDS.
THU NIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 8 SECONDS AND W 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS.
FRI
NE WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL: N
2 FT AT 3 SECONDS AND SE 2 FT AT 8 SECONDS. A CHANCE OF SHOWERS.
FRI NIGHT
E WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
2 FT AT 4 SECONDS AND SE 2 FT AT 9 SECONDS. A CHANCE OF SHOWERS.
SAT AND SAT NIGHT
SE WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SE 3 FT AT 5 SECONDS AND E 2 FT AT 8 SECONDS. SHOWERS
LIKELY.
SUN
S WINDS 5 TO 10 KT. SEAS AROUND 3 FT. SHOWERS LIKELY.
SUN NIGHT THROUGH MON NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 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.
ANZ232-201500-
NANTUCKET SOUND-
1005 PM EDT WED AUG 19 2026
OVERNIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 1 FOOT AT 4 SECONDS AND SW 1 FOOT AT 4 SECONDS. PATCHY FOG.
THU
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
1 FOOT AT 2 SECONDS AND SE 1 FOOT AT 6 SECONDS.
THU NIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR LESS. WAVE DETAIL: SW
1 FOOT AT 4 SECONDS AND E 1 FOOT AT 8 SECONDS, BECOMING W 1 FOOT
AT 2 SECONDS AND S 1 FOOT AT 5 SECONDS. A CHANCE OF SHOWERS IN
THE EVENING.
FRI
NE WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: N
1 FOOT AT 3 SECONDS AND S 1 FOOT AT 5 SECONDS. A CHANCE OF
SHOWERS.
FRI NIGHT
E WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SE 2 FT AT 4 SECONDS AND NW 1 FOOT AT 3 SECONDS. A CHANCE OF
SHOWERS.
SAT AND SAT NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 4 SECONDS AND NW 1 FOOT
AT 4 SECONDS. SHOWERS LIKELY.
SUN
S WINDS 10 TO 15 KT. SEAS AROUND 2 FT. SHOWERS LIKELY.
SUN NIGHT
SW WINDS 10 TO 15 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
MON AND MON NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 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.
ANZ233-201500-
VINEYARD SOUND-
1005 PM EDT WED AUG 19 2026
OVERNIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 1 FOOT AT 3 SECONDS AND NE 1 FOOT AT 4 SECONDS. PATCHY FOG.
THU
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT IN THE MORNING, THEN
1 FOOT OR LESS. WAVE DETAIL: SW 1 FOOT AT 4 SECONDS AND SE 1 FOOT
AT 8 SECONDS, BECOMING SW 1 FOOT AT 3 SECONDS AND S 1 FOOT AT
7 SECONDS.
THU NIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: SW 1 FOOT AT 4 SECONDS AND S 1 FOOT
AT 7 SECONDS. A CHANCE OF SHOWERS.
FRI
NE WINDS 5 TO 10 KT, BECOMING E IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: NE 1 FOOT AT 2 SECONDS AND W 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS.
FRI NIGHT
E WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SE 1 FOOT AT 4 SECONDS AND NW 1 FOOT AT 5 SECONDS. A CHANCE OF
SHOWERS.
SAT AND SAT NIGHT
SE WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE
DETAIL: E 2 FT AT 9 SECONDS AND E 1 FOOT AT 3 SECONDS. SHOWERS
LIKELY.
SUN
S WINDS 10 TO 15 KT. SEAS AROUND 2 FT. SHOWERS LIKELY.
SUN NIGHT THROUGH MON NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 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.
ANZ234-201500-
BUZZARDS BAY-
1005 PM EDT WED AUG 19 2026
OVERNIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 1 FOOT AT 4 SECONDS AND SW 1 FOOT AT 4 SECONDS. PATCHY FOG.
THU
SW WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL: SW
1 FOOT AT 4 SECONDS AND E 1 FOOT AT 6 SECONDS.
THU NIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
1 FOOT OR LESS. WAVE DETAIL: SW 1 FOOT AT 4 SECONDS AND SE 1 FOOT
AT 8 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
FRI
NE WINDS 5 TO 10 KT, BECOMING E IN THE AFTERNOON. SEAS
1 FOOT OR LESS, THEN AROUND 2 FT IN THE AFTERNOON. WAVE DETAIL: N
1 FOOT AT 3 SECONDS AND S 1 FOOT AT 5 SECONDS, BECOMING E 1 FOOT
AT 2 SECONDS AND NW 1 FOOT AT 3 SECONDS. A CHANCE OF SHOWERS.
FRI NIGHT
E WINDS AROUND 10 KT. SEAS AROUND 2 FT IN THE
EVENING, THEN 1 FOOT OR LESS. WAVE DETAIL: E 1 FOOT AT 2 SECONDS
AND NW 1 FOOT AT 5 SECONDS, BECOMING E 1 FOOT AT 2 SECONDS AND N
1 FOOT AT 4 SECONDS. A CHANCE OF SHOWERS.
SAT AND SAT NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: E 2 FT AT 8 SECONDS AND E 1 FOOT
AT 3 SECONDS. SHOWERS LIKELY.
SUN
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. SHOWERS LIKELY.
SUN NIGHT THROUGH MON NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 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.
ANZ235-201500-
RHODE ISLAND SOUND-
1005 PM EDT WED AUG 19 2026
OVERNIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
S 2 FT AT 7 SECONDS AND SW 1 FOOT AT 3 SECONDS.
THU
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
2 FT AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS.
THU NIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 8 SECONDS AND SW 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS.
FRI
NE WINDS AROUND 10 KT, BECOMING E IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: E 2 FT AT 3 SECONDS AND NW 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS.
FRI NIGHT
E WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 2 FT AT 4 SECONDS AND N 1 FOOT AT 3 SECONDS. A CHANCE OF
SHOWERS.
SAT AND SAT NIGHT
SE WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SE 3 FT AT 7 SECONDS AND E 2 FT AT 4 SECONDS. SHOWERS
LIKELY.
SUN
S WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. SHOWERS LIKELY.
SUN NIGHT THROUGH MON NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 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.
ANZ237-201500-
BLOCK ISLAND SOUND-
1005 PM EDT WED AUG 19 2026
OVERNIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SE 2 FT AT 7 SECONDS AND SW 1 FOOT AT 2 SECONDS.
THU
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT
AT 7 SECONDS AND W 1 FOOT AT 2 SECONDS.
THU NIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 8 SECONDS AND W 1 FOOT AT
2 SECONDS. A CHANCE OF SHOWERS.
FRI
NE WINDS 5 TO 10 KT, BECOMING E IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: E 2 FT AT 3 SECONDS AND NW 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS.
FRI NIGHT
E WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 2 FT AT 4 SECONDS AND SE 1 FOOT AT 7 SECONDS. A CHANCE OF
SHOWERS.
SAT AND SAT NIGHT
E WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: SE 3 FT AT 7 SECONDS AND E 2 FT AT 4 SECONDS. SHOWERS
LIKELY.
SUN
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. SHOWERS LIKELY.
SUN NIGHT THROUGH MON NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 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.
ANZ230-201500-
BOSTON HARBOR-
1005 PM EDT WED AUG 19 2026
OVERNIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
THU
W WINDS AROUND 5 KT, BECOMING E IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
THU NIGHT
W WINDS AROUND 5 KT, BECOMING N AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS. A CHANCE OF SHOWERS IN THE EVENING.
FRI
NE WINDS 5 TO 10 KT, BECOMING E IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
FRI NIGHT AND SAT
E WINDS 5 TO 10 KT. WAVES AROUND 2 FT. A
CHANCE OF SHOWERS.
SAT NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS. SHOWERS
LIKELY IN THE EVENING. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SUN AND SUN NIGHT
SE WINDS 5 TO 10 KT, BECOMING SW. WAVES
1 FOOT OR LESS. A CHANCE OF SHOWERS.
MON AND MON NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
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.
ANZ236-201500-
NARRAGANSETT BAY-
1005 PM EDT WED AUG 19 2026
OVERNIGHT
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
THU
W WINDS 5 TO 10 KT. WAVES AROUND 2 FT IN THE MORNING, THEN
1 FOOT OR LESS.
THU NIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS. A CHANCE OF SHOWERS IN THE EVENING.
FRI
NE WINDS 5 TO 10 KT, BECOMING E IN THE AFTERNOON. WAVES
1 FOOT OR LESS. A CHANCE OF SHOWERS IN THE AFTERNOON.
FRI NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS, THEN
AROUND 2 FT AFTER MIDNIGHT. A CHANCE OF SHOWERS.
SAT AND SAT NIGHT
E WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
SHOWERS LIKELY.
SUN AND SUN NIGHT
S WINDS 5 TO 10 KT, BECOMING SW. WAVES
AROUND 2 FT. A CHANCE OF SHOWERS.
MON AND MON NIGHT
W WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
DIMINISHING TO 5 TO 10 KT. WAVES 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.
ANZ280-201500-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
1005 PM EDT WED AUG 19 2026
OVERNIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
AROUND 3 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND SW 1 FOOT AT
3 SECONDS.
THU
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT
AT 8 SECONDS AND W 1 FOOT AT 3 SECONDS.
THU NIGHT
SW WINDS AROUND 5 KT, BECOMING N AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS AND NW 1 FOOT
AT 2 SECONDS. A CHANCE OF SHOWERS IN THE EVENING.
FRI
NE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT
AT 3 SECONDS AND SE 2 FT AT 8 SECONDS.
FRI NIGHT AND SAT
E 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 N 1 FOOT AT
4 SECONDS. A CHANCE OF SHOWERS.
SAT NIGHT
SE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS AROUND 3 FT. WAVE DETAIL: E 3 FT AT 7 SECONDS AND
SE 1 FOOT AT 13 SECONDS. SHOWERS LIKELY.
SUN AND SUN NIGHT
S WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT
WITH GUSTS UP TO 20 KT. SEAS AROUND 3 FT. A CHANCE OF SHOWERS.
MON AND MON NIGHT
SW WINDS 5 TO 10 KT, BECOMING W 10 TO 15 KT
WITH GUSTS UP TO 20 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.
ANZ281-201500-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
1005 PM EDT WED AUG 19 2026
OVERNIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS AND SW 1 FOOT AT
3 SECONDS. PATCHY FOG WITH VSBY 1 NM OR LESS.
THU
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT
AT 8 SECONDS AND W 1 FOOT AT 3 SECONDS. PATCHY FOG. VSBY 1 NM OR
LESS.
THU NIGHT
SW WINDS AROUND 5 KT, BECOMING NW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 8 SECONDS AND W 1 FOOT
AT 3 SECONDS. PATCHY FOG. SHOWERS LIKELY IN THE EVENING. A CHANCE
OF SHOWERS AND TSTMS AFTER MIDNIGHT. VSBY 1 NM OR LESS.
FRI
NE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E 2 FT
AT 8 SECONDS AND N 1 FOOT AT 2 SECONDS. A CHANCE OF SHOWERS.
FRI NIGHT
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
2 FT AT 4 SECONDS AND E 2 FT AT 8 SECONDS. A CHANCE OF SHOWERS.
SAT AND SAT NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: SE 4 FT AT 7 SECONDS AND E 3 FT AT
4 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS
LIKELY.
SUN
S WINDS AROUND 10 KT. SEAS 3 TO 4 FT. SHOWERS LIKELY.
SUN NIGHT
SW WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT. SEAS
3 TO 4 FT. A CHANCE OF SHOWERS.
MON AND MON NIGHT
W WINDS AROUND 10 KT. SEAS 3 TO 4 FT.
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.
ANZ282-201500-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
1005 PM EDT WED AUG 19 2026
OVERNIGHT
SW WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SE 2 FT AT 7 SECONDS AND SW 1 FOOT AT 3 SECONDS. PATCHY FOG WITH
VSBY 1 NM OR LESS.
THU
SW WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
2 FT AT 9 SECONDS AND W 1 FOOT AT 3 SECONDS. PATCHY FOG. VSBY
1 NM OR LESS.
THU NIGHT
W WINDS AROUND 5 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SE 2 FT AT 8 SECONDS AND S 2 FT AT 8 SECONDS. PATCHY FOG. A
CHANCE OF TSTMS. SHOWERS LIKELY IN THE EVENING, THEN A CHANCE OF
SHOWERS AFTER MIDNIGHT. VSBY 1 NM OR LESS.
FRI
NE WINDS 5 TO 10 KT, BECOMING E IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 8 SECONDS AND NE 1 FOOT AT
2 SECONDS. A CHANCE OF SHOWERS.
FRI NIGHT
E WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
2 FT AT 3 SECONDS AND E 2 FT AT 8 SECONDS. SHOWERS LIKELY.
SAT AND SAT NIGHT
S WINDS AROUND 10 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: SE 4 FT AT 5 SECONDS AND E 2 FT AT 8 SECONDS. SHOWERS. A
CHANCE OF TSTMS THROUGH THE NIGHT.
SUN
SW WINDS AROUND 10 KT. SEAS 3 TO 4 FT. SHOWERS LIKELY.
SUN NIGHT
SW WINDS AROUND 10 KT. SEAS 3 TO 4 FT. A CHANCE OF
SHOWERS.
MON AND MON NIGHT
W WINDS AROUND 10 KT. SEAS 3 TO 4 FT.
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.
ANZ283-201500-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
1005 PM EDT WED AUG 19 2026
OVERNIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
S 2 FT AT 7 SECONDS AND SE 2 FT AT 8 SECONDS.
THU
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
2 FT AT 8 SECONDS AND W 1 FOOT AT 3 SECONDS.
THU NIGHT
W WINDS 5 TO 10 KT, BECOMING NW AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: SE 2 FT AT 8 SECONDS AND SW 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS.
FRI
NE WINDS 5 TO 10 KT, BECOMING E 10 TO 15 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: NE 2 FT AT 3 SECONDS AND
SE 2 FT AT 9 SECONDS. A CHANCE OF SHOWERS.
FRI NIGHT
SE WINDS 10 TO 15 KT. SEAS AROUND 3 FT. WAVE DETAIL:
E 2 FT AT 4 SECONDS AND S 2 FT AT 5 SECONDS. SHOWERS LIKELY.
SAT
SE WINDS AROUND 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: SE
3 FT AT 5 SECONDS AND SE 2 FT AT 8 SECONDS. A CHANCE OF SHOWERS
IN THE MORNING, THEN SHOWERS LIKELY WITH A CHANCE OF TSTMS IN THE
AFTERNOON.
SAT NIGHT
S WINDS AROUND 10 KT. SEAS 3 TO 5 FT. SHOWERS
LIKELY.
SUN
S WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. SHOWERS LIKELY.
SUN NIGHT
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. A CHANCE OF
SHOWERS.
MON AND MON NIGHT
W WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
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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