NWS Marine Forecast

   GMZ005-131430-  Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas  1029 PM EDT Mon Oct 12 2026      .SYNOPSIS...  A couple of nearby features will define the weather across the  Florida Keys for the first half of the week. The Atlantic Ridge is  gradually weakening and retreating east towards the central  Atlantic. Another region of high pressure is located over the  Southeast and northern Gulf. Between the two high pressure  centers lies a weak frontal boundary that is extending across  south Florida. The front is forecast to slowly pass across the  Keys waters on Tuesday. This will promote gentle to moderate  northeast to east breezes. There will be slight chances for  showers and a few thunderstorms over the next few days as the  diffuse and weakening front stalls near the Straits of Florida.  Late in the week, a strong cold front could develop and move  towards the Florida Keys. Currently, there are low chances that  the front will make it to the Florida Keys waters. We will  continue monitoring this system.    The Approximate Shoreward Edge of the Gulf Stream as of October  9, 2026...    53 NM south-southeast of Dry Tortugas Light, on Loggerhead Key  33 NM south-southeast of Cosgrove Shoal Light, off the Marquesas Keys  24 NM south-southeast of Sand Key Light, off Key West  19 NM south-southeast of Looe Key, off Big Pine Key  13 NM south-southeast of Sombrero Key Light, off Marathon  5 NM south-southeast of Alligator Reef Light, off Islamorada  2 NM east of Molasses Reef Light, off Key Largo  2 NM east of Carysfort Reef Light, off Ocean Reef    Gulf Stream Information Courtesy of the Naval Oceanographic  Office.    $$

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   GMZ033-034-131430-  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-  1029 PM EDT Mon Oct 12 2026    OVERNIGHT  North to northeast winds 10 to 15 knots. Seas 2 to 3  feet. Wave Detail: North 2 feet at 5 seconds. A slight chance of  showers and thunderstorms.  TUESDAY  Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave  Detail: North to northeast 2 feet at 5 seconds.  TUESDAY NIGHT  Northeast winds 10 to 15 knots. Seas 2 to  3 feet. Wave Detail: North to northeast 3 feet at 4 seconds. A  slight chance of showers.  WEDNESDAY  Northeast to east winds 10 to 15 knots. Seas 2 to  3 feet, subsiding to 1 to 2 feet. A slight chance of showers and  thunderstorms.  WEDNESDAY NIGHT  East winds 10 to 15 knots. Seas 1 to 2 feet. A  chance of showers with a slight chance of thunderstorms.  THURSDAY  East winds 10 to 15 knots. Seas 1 to 2 feet. A chance  of showers with a slight chance of thunderstorms.  THURSDAY NIGHT  East winds 10 to 15 knots. Seas 1 to 2 feet. A  slight chance of showers and thunderstorms.  FRIDAY  East winds near 10 knots, decreasing to 5 to 10 knots.  Seas 1 to 2 feet, subsiding to around 1 foot. A chance of showers  and thunderstorms.  FRIDAY NIGHT  Northeast winds 5 to 10 knots. Seas around  1 foot. A chance of showers and thunderstorms.  SATURDAY  Northeast winds near 10 knots, increasing to 10 to 15  knots. Seas around 1 foot, building to 1 to 2 feet. Showers  likely with a chance of thunderstorms.  SATURDAY NIGHT  Northeast to east winds 15 to 20 knots. Seas 1  to 2 feet, building to 2 to 3 feet. Showers likely with a slight  chance of thunderstorms.    $$