NWS Marine Forecast


   GMZ005-152030-  Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas  429 AM EDT Tue Jul 15 2025      .SYNOPSIS...Weak low pressure continues to become better organized  in the vicinity of the Space Coast. However, the overall pressure  pattern remains rather weak, therefore, light to gentle southeast  to south breezes are expected to continue today. In addition,  another round of showers and thunderstorms are expected today with  the main threats being gusty winds and confused seas near  convection. As the weak low pressure shifts off to the west and  into the Gulf, high pressure will build in behind it strengthening  the pressure gradient. This will lead to gentle to moderate  breezes tonight. High pressure remains anchored over the central  Atlantic with its western periphery extending into the Keys  through the weekend with gentle to moderate east to southeast  breezes continuing, occasionally becoming moderate to fresh.    The Approximate Shoreward Edge of the Gulf Stream as of July 15...    18 NM South of Dry Tortugas Light...on Loggerhead Key.  3 NM South of Cosgrove Shoal Light...off the Marquesas Keys.  1 NM South of Sand Key Light...off Key West.  4 NM South of Looe Key...off Big Pine Key.  4 NM Southeast of Sombrero Key Light...off Marathon.  10 NM Southeast of Alligator Reef Light...off Islamorada.  6 NM Southeast of Molasses Reef Light...off Key Largo.  3 NM Southeast of Carysfort Reef Light...off Ocean Reef.    Gulf Stream Information Courtesy of the National Weather Service in  Key West based on products from NASA SPoRT.    $$
   GMZ042>044-152030-  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-  429 AM EDT Tue Jul 15 2025    TODAY  Southeast to south winds 5 to 10 knots. Seas around 1  foot. Nearshore waters smooth to a light chop. Winds and seas  higher in and around widespread showers and scattered  thunderstorms.  TONIGHT  Southeast winds 5 to 10 knots, increasing to 10 to 15  knots after midnight. Seas around 1 foot, building to 1 to 2  feet. Nearshore waters smooth to a light chop, becoming a light to  moderate chop. Numerous showers and scattered thunderstorms.  WEDNESDAY  Southeast winds near 15 knots, decreasing to near 10  knots. Seas around 2 feet, subsiding to 1 to 2 feet. Nearshore  waters a moderate chop, becoming a light chop. Numerous showers  and scattered thunderstorms.  WEDNESDAY NIGHT  East to southeast winds 10 to 15 knots,  increasing to near 15 knots. Seas around 2 feet, building to 2 to  3 feet. Nearshore waters a light to moderate chop, becoming a  moderate chop. Scattered showers and isolated thunderstorms.  THURSDAY  East to southeast winds near 15 knots. Seas around 3  feet. Nearshore waters a moderate chop. Scattered showers and  isolated thunderstorms.  THURSDAY NIGHT  East to southeast winds near 15 knots,  increasing to 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5  feet. Nearshore waters a moderate chop, becoming choppy.  Scattered showers and isolated thunderstorms.  FRIDAY  East to southeast winds 15 to 20 knots, decreasing to  near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet,  subsiding to 2 to 4 feet, occasionally to 5 feet. Nearshore waters  choppy, becoming a moderate chop. Scattered showers and isolated  thunderstorms.  FRIDAY NIGHT  East winds 10 to 15 knots. Seas 2 to 3 feet.  Nearshore waters a light to moderate chop. Isolated showers and  thunderstorms.  SATURDAY  East winds 10 to 15 knots. Seas 2 to 3 feet.  Nearshore waters a light to moderate chop. Isolated showers and  thunderstorms.  SATURDAY NIGHT  East winds 10 to 15 knots. Seas 2 to 3 feet.  Nearshore waters a light to moderate chop. Isolated showers and  thunderstorms.    $$