NWS Marine Forecast

   GMZ005-301445-  Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas  1037 PM EDT Tue Sep 29 2026      .SYNOPSIS...  A high pressure system across the eastern third of the U.S. will  steadily shift east into the western Atlantic through tonight. As  it does, gentle east to southeast breezes will remain in place.  Thereafter, this high will shift further offshore and merge with  an existing high pressure across the subtropical Atlantic and  subsequently build through the remainder of the week. This will  promote freshening breezes with an increasing likelihood of  moderate to fresh breezes beginning Wednesday, continuing through  late week. There is a good chance that marine Cautions may be  required for portions of Keys waters at that time, and Advisories  cannot be ruled out. In addition, a very wet pattern will remain  across the Keys over the next few days, resulting in periods of  scattered to numerous showers and thunderstorms.    The Approximate Shoreward Edge of the Gulf Stream as of  September 25, 2026...    43 NM south of Dry Tortugas Light, on Loggerhead Key  20 NM south of Cosgrove Shoal Light, off the Marquesas Keys  14 NM south of Sand Key Light, off Key West  7 NM south-southeast of Looe Key, off Big Pine Key  4 NM south-southeast of Sombrero Key Light, off Marathon  4 NM south-southeast of Alligator Reef Light, off Islamorada  0 NM southeast of Molasses Reef Light, off Key Largo  1 NM west-northwest of Carysfort Reef Light, off Ocean Reef    Gulf Stream Information Courtesy of the Naval Oceanographic Office.    $$

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   GMZ033-034-301445-  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-  1037 PM EDT Tue Sep 29 2026    OVERNIGHT  Southeast winds 10 to 15 knots. Seas 1 to 2 feet. Wave  Detail: Southeast 2 feet at 3 seconds. Showers likely with a  chance of thunderstorms.  WEDNESDAY  East to southeast winds 10 to 15 knots, increasing  to 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave  Detail: East to southeast 3 feet at 4 seconds. Showers and  thunderstorms likely.  WEDNESDAY NIGHT  East winds 15 to 20 knots. Seas 3 to 5 feet,  occasionally to 6 feet. Wave Detail: East to southeast 5 feet at  5 seconds. Showers likely with a chance of thunderstorms.  THURSDAY  East to southeast winds 15 to 20 knots. Seas 3 to  5 feet, occasionally to 6 feet. Showers and thunderstorms likely.  THURSDAY NIGHT  East to southeast winds 15 to 20 knots. Seas  3 to 5 feet, occasionally to 6 feet. Showers likely with a chance  of thunderstorms.  FRIDAY  East to southeast winds 15 to 20 knots. Seas 3 to  5 feet, occasionally to 6 feet. A chance of showers and  thunderstorms.  FRIDAY NIGHT  East to southeast winds 15 to 20 knots. Seas 3 to  4 feet, occasionally to 5 feet. A chance of showers and  thunderstorms.  SATURDAY  East to southeast winds 15 to 20 knots. Seas 2 to  4 feet, occasionally to 5 feet. A chance of showers and  thunderstorms.  SATURDAY NIGHT  East winds near 15 knots. Seas 3 to 4 feet,  occasionally to 5 feet. A slight chance of showers and  thunderstorms.  SUNDAY  East to southeast winds 10 to 15 knots. Seas 2 to  4 feet, occasionally to 5 feet. A slight chance of showers and  thunderstorms.  SUNDAY NIGHT  East winds 10 to 15 knots. Seas 1 to 3 feet. A  slight chance of showers and thunderstorms.    $$