NWS Marine Forecast

   GMZ005-300830-  Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas  430 PM EDT Thu Oct 29 2026      .SYNOPSIS...  Gentle to moderate northeasterly breezes will prevail across the  Florida Keys through the first half of the weekend. By late  Saturday, a high pressure system developing over the eastern  United States will be able to build and set up north of the  Carolinas. Breezes may be able to freshen to moderate to fresh  over the northern waters of the Florida Keys. Northerly swell  over the easternmost waters will be a concern for the second half  of the weekend. Shower chances are also expected to peak Saturday  night through Sunday night. Currently, the forecast does not  suggest marine hazards will be required for the Keys Coastal  Waters.    The Approximate Shoreward Edge of the Gulf Stream as of October  27, 2026...    19 NM south of Dry Tortugas Light, on Loggerhead Key  34 NM south of Cosgrove Shoal Light, off the Marquesas Keys  28 NM south of Sand Key Light, off Key West  38 NM south of Looe Key, off Big Pine Key  31 NM southeast of Sombrero Key Light, off Marathon  17 NM south-southeast of Alligator Reef Light, off Islamorada  10 NM southeast of Molasses Reef Light, off Key Largo  10 NM northwest 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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   GMZ042>044-300830-  Hawk Channel from Ocean Reef to Craig Key out to the reef-  Hawk Channel from Craig Key to west end of Seven Mile Bridge out  to the reef-  Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal  out to the reef-  430 PM EDT Thu Oct 29 2026    TONIGHT  Northeast to east winds near 10 knots, increasing to 10  to 15 knots. Seas 1 to 2 feet, except around 2 feet west of  Cosgrove Shoal Light. Nearshore waters a light chop, becoming a light  to moderate chop. A slight chance of showers.  FRIDAY  Northeast to east winds 10 to 15 knots. Seas 1 to  2 feet, except around 2 feet west of Cosgrove Shoal Light.  Nearshore waters a light to moderate chop. A slight chance of  showers and thunderstorms.  FRIDAY NIGHT  Northeast to east winds 10 to 15 knots. Seas 1 to  2 feet, except 2 to 3 feet west of Cosgrove Shoal Light.  Nearshore waters a light to moderate chop. A chance of showers  with a slight chance of thunderstorms.  SATURDAY  Northeast to east winds near 15 knots. Seas 2 to  3 feet. Nearshore waters a moderate chop. A chance of showers  with a slight chance of thunderstorms.  SATURDAY NIGHT  Northeast to east winds 15 to 20 knots. Seas 2  to 3 feet, except 3 to 4 feet in eastern Hawk Channel due to  northerly swell. Nearshore waters choppy. A chance of showers with  a slight chance of thunderstorms.  SUNDAY  East winds near 15 knots. Seas 2 to 3 feet, except 3 to  4 feet in eastern Hawk Channel due to northerly swell. Nearshore  waters a moderate chop. Showers likely with a chance of  thunderstorms.  SUNDAY NIGHT  Northeast to east winds 15 to 20 knots, decreasing  to near 15 knots. Seas 2 to 3 feet, except 3 to 4 feet in eastern  Hawk Channel due to northerly swell. Nearshore waters choppy,  becoming a moderate chop. Showers likely with a chance of  thunderstorms.  MONDAY  Northeast to east winds decreasing to 10 to 15 knots.  Seas 2 to 3 feet. Nearshore waters becoming a light to moderate  chop. A chance of showers and thunderstorms.  MONDAY NIGHT  Northeast to east winds 10 to 15 knots. Seas 2 to  3 feet. Nearshore waters a light to moderate chop. A slight  chance of showers and thunderstorms.  TUESDAY  Northeast to east winds 10 to 15 knots. Seas 1 to  3 feet. Nearshore waters a light to moderate chop. A slight  chance of showers.  TUESDAY NIGHT  Northeast to east winds near 10 knots, decreasing  to 5 to 10 knots. Seas subsiding to 1 to 2 feet. Nearshore waters  a light chop, becoming smooth to a light chop. A slight chance of  showers and thunderstorms.    $$