Marine Weather Net

Gulf of Mexico including Dry Tortugas and Rebecca Shoal Channel Marine Forecast


TODAY

NW
WINDS
5 KNOTS

TONIGHT

N
WINDS
5
KNOTS

FRIDAY

SSW
WINDS
5 KNOTS

FRIDAY NIGHT

NNE
WINDS
5 KNOTS

The Marine Weather Forecast In Detail:
GMZ034 Forecast Issued: 355 AM EDT Thu Aug 20 2026

Today...Northwest Winds Near 5 Knots. Seas Around 1 Foot. Wave Detail: Northwest 1 Foot At 5 Seconds. A Slight Chance Of Showers And Thunderstorms.
Tonight...North Winds Near 5 Knots, Becoming Southeast To South. Seas Around 1 Foot. Wave Detail: Northwest 1 Foot At 5 Seconds. A Slight Chance Of Showers And Thunderstorms.
Friday...South To Southwest Winds Near 5 Knots, Becoming West. Seas Around 1 Foot. Wave Detail: Northwest 1 Foot At 4 Seconds.
Friday Night...North To Northeast Winds Near 5 Knots, Becoming Southeast. Seas Around 1 Foot. A Slight Chance Of Showers And Thunderstorms.
Saturday...Southeast To South Winds Near 5 Knots, Becoming Northwest. Seas Around 1 Foot.
Saturday Night...North To Northeast Winds Near 5 Knots, Becoming East To Southeast. Seas 1 Foot Or Less.
Sunday...Northeast Winds Near 5 Knots. Seas 1 Foot Or Less.
Sunday Night...East Winds Near 5 Knots. Seas 1 Foot Or Less. A Slight Chance Of Showers And Thunderstorms.
Monday...East To Southeast Winds Near 5 Knots. Seas Around 1 Foot. A Slight Chance Of Showers And Thunderstorms.
Monday Night...East Winds 5 To 10 Knots. Seas Around 1 Foot. A Chance Of Showers And Thunderstorms.
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GMZ005 Synopsis Issued: 355 AM EDT Thu Aug 20 2026

Synopsis...
A Split Ridge Across Our Waters With A Nearby Col Will Result In Light And Variable Winds Today. The Split Ridge Pattern Will Remain In Place Through The End Of The Week And Early In The Weekend With A Mostly Light To Gentle Variable Wind Pattern. Winds Then Increase And Become More Southeasterly Late Weekend And Into The New Week With Daily Gentle To Moderate Breezes Expected. In Addition, Atmospheric Moisture Is Starting To Recover Across The Area After The Saharan Dust That Blanketed The Area Continues To Depart, So Scattered Showers And Occasional Thunderstorms Could Occur With Rain Chances Peaking Around 30 Percent Over The Next Several Days. However, Rain Chances Will Increase Further By The New Week As The Southeasterly Flow Becomes More Established. The Approximate Shoreward Edge Of The Gulf Stream As Of August 13, 2026... 38 Nm South Of Dry Tortugas Light...On Loggerhead Key. 20 Nm South Of Cosgrove Shoal Light...Off The Marquesas Keys. 17 Nm South Of Sand Key Light...Off Key West. 21 Nm South Of Looe Key...Off Big Pine Key. 18 Nm Southeast Of Sombrero Key Light...Off Marathon. 7 Nm Southeast Of Alligator Reef Light...Off Islamorada. 7 Nm Southeast Of Molasses Reef Light...Off Key Largo. 2 Nm Southeast Of Carysfort Reef Light...Off Ocean Reef. Gulf Stream Information Courtesy Of The National Weather Service In Key West, Using Data From Rtofs And Nasa Sport Sst.

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