NWS Marine Forecast

   GMZ005-210845-  Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas  438 PM EDT Sun Sep 20 2026      .SYNOPSIS...  A wet weather pattern will persist across the Florida Keys  coastal waters for the next several days as an upper- level low  lingers in the eastern Gulf waters. As a result, the main hazards  from scattered to numerous showers and thunderstorms will be a  daily occurence with gusty winds, lightning strikes, blinding  downpours, and locally hazardous seas. Breezes will generally  remain light to gentle into the new week but brief periods of  moderate breezes may occur in the evening hours.    The Approximate Shoreward Edge of the Gulf Stream as of September  15, 2026...    64 NM south-southeast of Dry Tortugas Light, on Loggerhead Key  40 NM south-southeast of Cosgrove Shoal Light, off the Marquesas Keys  36 NM south-southeast of Sand Key Light, off Key West  35 NM southeast of Looe Key, off Big Pine Key  28 NM southeast of Sombrero Key Light, off Marathon  15 NM east-southeast of Alligator Reef Light, off Islamorada  8 NM east-southeast of Molasses Reef Light, off Key Largo  5 NM east-southeast of Carysfort Reef Light, off Ocean Reef    Gulf Stream Information Courtesy of the Naval Oceanographic Office.    $$

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   GMZ033-034-210845-  Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM  out and beyond 5 fathoms-  Gulf of America including Dry Tortugas and Rebecca Shoal Channel-  438 PM EDT Sun Sep 20 2026    TONIGHT  Northeast to east winds near 5 knots, becoming  southeast near 5 knots late this evening, then becoming south  after midnight. Seas 1 foot or less. Wave Detail: South 1 foot at  3 seconds. A chance of showers and thunderstorms.  MONDAY  South to southwest winds near 5 knots. Seas 1 foot or  less. Wave Detail: South 1 foot at 3 seconds. A chance of showers  and thunderstorms.  MONDAY NIGHT  Southeast to south winds 5 to 10 knots. Seas  around 1 foot. Wave Detail: Southeast to south 1 foot at  3 seconds. Showers likely with a chance of thunderstorms.  TUESDAY  South winds 5 to 10 knots. Seas around 1 foot. Showers  likely with a chance of thunderstorms.  TUESDAY NIGHT AND WEDNESDAY  Southeast to south winds 5 to 10  knots. Seas around 1 foot. Showers likely with a chance of  thunderstorms.  WEDNESDAY NIGHT  Southeast winds near 5 knots. Seas 1 foot or  less. Showers likely with a chance of thunderstorms.  THURSDAY  East to southeast winds near 5 knots. Seas 1 foot or  less. A chance of thunderstorms. A chance of showers.  THURSDAY NIGHT  East winds near 5 knots. Seas 1 foot or less. A  chance of showers and thunderstorms.  FRIDAY AND FRIDAY NIGHT  Northeast to east winds 5 to 10 knots.  Seas 1 to 2 feet. A chance of showers and thunderstorms.    $$