NWS Marine Forecast


   GMZ005-102045-  Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas  438 AM EDT Thu Sep 10 2026      .SYNOPSIS...  Ridging across the southeastern United States and Florida will  maintain gentle to moderate east to southeasterly breezes. Expect  breezes to peak in the evening and overnight while lulling during  the day during the day. A series of lower level moisture swathes  will support periods of elevated rain and thunder chances through  the remainder of the week.      The Approximate Shoreward Edge of the Gulf Stream as of September  2, 2026...    34 NM south-southwest of Dry Tortugas Light, on Loggerhead Key  34 NM south-southeast of Cosgrove Shoal Light, off the Marquesas Keys  26 NM south-southeast of Sand Key Light, off Key West  21 NM south-southeast of Looe Key, off Big Pine Key  17 NM southeast of Sombrero Key Light, off Marathon  10 NM southeast of Alligator Reef Light, off Islamorada  6 NM east-southeast of Molasses Reef Light, off Key Largo  1 NM east-southeast of Carysfort Reef Light, off Ocean Reef    This data courtesy of the Naval Oceanographic Office.    $$
   GMZ033-034-102045-  Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM  out and beyond 5 fathoms-  Gulf of America including Dry Tortugas and Rebecca Shoal Channel-  438 AM EDT Thu Sep 10 2026    TODAY  East to southeast winds near 10 knots, becoming around  5 knots late. Seas around 1 foot. Wave Detail: East 1 foot at  3 seconds. Showers likely with a chance of thunderstorms.  TONIGHT  East to southeast winds increasing to near 10 knots.  Seas 1 to 2 feet. Wave Detail: East 1 foot at 3 seconds. A chance  of showers and thunderstorms.  FRIDAY  East to southeast winds 5 to 10 knots. Seas 1 to  2 feet. Wave Detail: Southeast 1 foot at 3 seconds. A chance of  showers and thunderstorms.  FRIDAY NIGHT  East to southeast winds increasing to 10 to 15  knots. Seas 1 to 2 feet. A chance of showers and thunderstorms.  SATURDAY  East to southeast winds near 10 knots. Seas 1 to  2 feet. Showers likely with a chance of thunderstorms.  SATURDAY NIGHT  East to southeast winds 10 to 15 knots. Seas  1 to 2 feet. A chance of showers and thunderstorms.  SUNDAY  East to southeast winds 5 to 10 knots. Seas around  1 foot. Showers likely with a chance of thunderstorms.  SUNDAY NIGHT  East winds 5 to 10 knots. Seas around 1 foot. A  chance of showers and thunderstorms.  MONDAY  East winds 5 to 10 knots. Seas around 1 foot. A chance  of showers and thunderstorms.  MONDAY NIGHT  Northeast to east winds 5 to 10 knots, becoming  east 10 to 15 knots. Seas building to 1 to 2 feet. A chance of  showers and thunderstorms.    $$