North Atlantic High Seas Forecast

MARINER'S
WEATHER

Marine
Forecasts

Buoys Sea Temp Conditions Satellite/Radar Web Cams

Marine

Northeast Coast
& Maritimes

Click for a new Marine Forecast WHX CAR GYX BOX OKX Offshore High Seas

High Seas Forecast

Resources

FZNT01 KWBC 092136 HSFAT1

HIGH SEAS FORECAST FOR METAREA IV NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC SUN AUG 09 2026

CCODE/1:31:04:01:00/AOE/NWS/CCODE
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS

SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.

ONLY YOU KNOW THE WEATHER AT YOUR POSITION. REPORT IT TO THE NATIONAL WEATHER SERVICE. EMAIL US AT VOSOPS@NOAA.GOV(LOWERCASE).

FOR INFORMATION ON ATLANTIC ICEBERGS SEE INFORMATION FROM NORTH ATLANTIC ICE SERVICE AT HTTPS://OCEAN.WEATHER.GOV/ATL_TAB.PHP (ALL LOWERCASE).

FOR ANY TROPICAL CYCLONE INFORMATION BEYOND 48 HOURS REFERENCE THE ASSOCIATED NWS TROPICAL CYCLONE FORECAST/ADVISORY (TCM).

SECURITE...

NORTH ATLANTIC NORTH OF 31N TO 67N AND WEST OF 35W

ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS

SYNOPSIS VALID 1800 UTC AUG 09.
24 HOUR FORECAST VALID 1800 UTC AUG 10.
48 HOUR FORECAST VALID 1800 UTC AUG 11.

.
WARNINGS

... GALE WARNING ... .COMPLEX LOW WITH MAIN CENTER JUST E OF AREA NEAR 48N33W 992 MB MOVING N 10 KT. BETWEEN 240 NM AND 420 NM N QUARANT WINDS 25 TO 35 KT. SEAS 3 TO 4 M. ELSEWHERE FROM 35N TO 56N E OF 48W WINDS TO 25 KT. SEAS 2.5 TO 3.5 M.
.24 HOUR FORECAST...   LOW JUST E OF AREA NEAR 51N32W 989 MB. WITHIN 300 NM NW AND 360 NM SW QUADRANTS WINDS 25 TO 35 KT. SEAS 3.5 TO 5 M. ELSEWHERE FROM 41N TO 57N E OF 48W WINDS TO 25 KT. SEAS 2.5 TO 4.5 M.
.48 HOUR FORECAST...   LOW E OF AREA NEAR 55N26W 992 MB. FROM 40N TO 59N E OF 43W WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M.

SYNOPSIS AND FORECAST....

.24 HOUR FORECAST...   NEW LOW 41N40W 1008 MB. FROM 38N TO 41N BETWEEN 37W AND 46W WINDS 20 TO 30 KT. SEAS TO 3 M.
.48 HOUR FORECAST...   LOW AND ASSOCIATED CONDITIONS MOVED E OF AREA.
.48 HOUR FORECAST...   NEW LOW 37N58W 1013 MB. FROM 34N TO 37N BETWEEN 57W AND 61W WINDS TO 25 KT. SEAS TO 3 M.

.48 HOUR FORECAST...   LOW 57N59W 998 MB. FROM 52N TO 57W BETWEEN 49W AND 56W WINDS TO 25 KT. SEAS TO 2.5 M.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 43N TO 46N BETWEEN 58W AND 68W...FROM 49N TO 52N E OF 39W...AND SW OF A LINE FROM 56N59W TO 60N62N.
.24 HOUR FORECAST...   DENSE FOG FROM 49N TO 54N E OF 36W...AND FROM 54N TO 60N W OF 59W.
.48 HOUR FORECAST...   DENSE FOG FROM 52N TO 60N W OF 52W...AND FROM 43N TO 45N BETWEEN 65W AND 68W.

.

FORECASTER POCHE. OCEAN PREDICTION CENTER.

NWS NATIONAL HURRICANE CENTER MIAMI FL

ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND GULF OF AMERICA

SYNOPSIS VALID 1800 UTC SUN AUG 9.
24 HOUR FORECAST VALID 1800 UTC MON AUG 10.
48 HOUR FORECAST VALID 1800 UTC TUE AUG 11.

.
WARNINGS

.NONE.

SYNOPSIS AND FORECAST....

.ATLC...   AND CARIBBEAN WITHIN 21N71W TO 21N74W TO 20N74W TO 20N73W TO 20N71W TO 21N71W NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST...   LITTLE CHANGE.
.48 HOUR FORECAST...   LITTLE CHANGE.

.CARIBBEAN WITHIN 17N71W TO 18N76W TO 12N81W TO 10N78W TO 12N72W TO 12N69W TO 17N71W...INCLUDING THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 25 KT...EXCEPT 25 TO 30 KT S OF 13N BETWEEN 74W AND 77W. SEAS 2.5 TO 3.5 M W OF 74W.
.24 HOUR FORECAST...   WITHIN 18N71W TO 18N78W TO 12N79W TO 11N77W TO 12N72W TO 11N70W TO 12N69W TO 18N71W...INCLUDING THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 25 KT...EXCEPT 25 TO 30 KT S OF 13N BETWEEN 74W AND 76W. SEAS 2.5 TO 3 M W OF 72W.
.48 HOUR FORECAST...   LITTLE CHANGE.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

.

FORECASTER AGUIRRE. NATIONAL HURRICANE CENTER.

Wind, Wave
Pressure

Sea
Temperature

Buoy/CMAN
Reports

Radar and
Satellite

-- Weather Tools --

TEMPERATURE (Fahrenheit, Celsius, Kelvin)

TIME CONVERSIONS (UTC, GMT, 24 hour)

WIND SCALES (Beaufort, Saffir-Simpson)

WIND CHILL (Old vs New, Frostbite chart)

WEATHER CALCULATORS

Maine Harbors obtains forecasts and other information from the National Weather Service - (IWIN) and Environment Canada. US Forecasts are public domain and cannot be copyrighted. Canadian forecasts are copyright of Environment Canada.

Limitation of Liability - Maine Harbors does not warrant the accuracy, completeness, merchantability or fitness for a particular purpose of any of the weather information offered through this service. Under no circumstances shall Maine Harbors be liable to you or any other person for any indirect, special, incidental, or consequential damages arising from the use of this service.