NWS Marine Forecast

   GMZ005-230230-  Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas  1017 AM EDT Tue Sep 22 2026      .SYNOPSIS...  Unsettled weather will persist through the next several days as  deep tropical moisture spreads into the region, which will support  scattered to numerous showers and thunderstorms at times. Breezes  outside of convection will generally remain light to gentle out of  the south the next several days with brief periods of moderate  breezes occurring at times, mainly in the evening and overnight  hours. Winds briefly become light and variable on Thursday before  shifting more northerly in the wake of a frontal boundary that is  forecast to push southward across the coastal waters of the  Florida Keys late in the week. In addition, seas will also start  to build by the end of the week and into the weekend as northeasterly  swell increases following the frontal passage, especially in the  Straits of Florida.    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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   GMZ042>044-230230-  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-  1017 AM EDT Tue Sep 22 2026    THIS AFTERNOON  South winds 10 to 15 knots. Seas around 1 foot.  Nearshore waters a light to moderate chop. Showers likely with a  chance of thunderstorms.  TONIGHT  Southeast to south winds near 10 knots. Seas 1 to  2 feet. Nearshore waters a light chop. Showers likely with a  chance of thunderstorms.  WEDNESDAY  South winds 5 to 10 knots. Seas 1 to 2 feet.  Nearshore waters smooth to a light chop. Showers likely with a  chance of thunderstorms.  WEDNESDAY NIGHT  Southeast winds near 5 knots. Seas around  1 foot. Nearshore waters smooth. Showers likely with a chance of  thunderstorms.  THURSDAY  North to northeast winds near 5 knots. Seas around 1  foot. Nearshore waters smooth. A chance of showers and  thunderstorms.  THURSDAY NIGHT  North winds near 5 knots, becoming north to  northeast. Seas around 1 foot. Nearshore waters smooth. A chance  of showers and thunderstorms.  FRIDAY  North to northeast winds 5 to 10 knots. Seas 1 to  2 feet due to increasing northeasterly swell. Nearshore waters  smooth to a light chop. A chance of showers and thunderstorms.  FRIDAY NIGHT  Northeast winds 5 to 10 knots. Seas 1 to 2 feet,  except around 2 feet west of Cosgrove Shoal Light. Nearshore  waters smooth to a light chop. A chance of showers and  thunderstorms.  SATURDAY  Northeast winds 5 to 10 knots. Seas 1 to 2 feet due to  northeasterly swell. Nearshore waters smooth to a light chop. A  chance of showers and thunderstorms.  SATURDAY NIGHT  Northeast winds near 5 knots. Seas 1 to 2 feet.  Nearshore waters smooth. A chance of showers and thunderstorms.    $$