Hazardous marine condition(s):
Short Term Forecast
GMZ005-041445-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1038 PM EDT Fri Oct 3 2025
.SYNOPSIS...High pressure is slowly moving across the eastern
U.S., which will maintain a northeast wind across our waters.
This high will build into the western North Atlantic, leading to
freshening northeast to east breezes into Friday evening. Winds
will then briefly clock around towards the southeast for the
upcoming weekend and return from the east early next week. Another
period of moderate to fresh breezes is possible starting Monday
night. Expect an active weather pattern with winds and seas
expected to be higher in and around thunderstorms.
The Approximate Shoreward Edge of the Gulf Stream as of October
01...
42 NM South of Dry Tortugas Light...on Loggerhead Key.
33 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
33 NM South of Sand Key Light...off Key West.
35 NM South of Looe Key...off Big Pine Key.
16 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.
5 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.
$$
GMZ053>055-073>075-041445- Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 NM- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM- Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas 20 to 60 NM out- 1038 PM EDT Fri Oct 3 2025 OVERNIGHT Northeast to east winds near 15 knots, becoming east to southeast 10 to 15 knots. Seas 3 to 6 feet, occasionally to 7 feet. Wave Detail: Northeast 4 feet at 6 seconds. Scattered showers and isolated thunderstorms. SATURDAY South to southwest winds near 10 knots, briefly decreasing to 5 to 10 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Wave Detail: Northeast 3 feet at 6 seconds. Scattered showers and isolated thunderstorms. SATURDAY NIGHT South winds near 10 knots, increasing to 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: East to southeast 2 feet at 6 seconds. Scattered showers and isolated thunderstorms. SUNDAY South to southwest winds near 10 knots, becoming southeast 5 to 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Scattered showers and isolated thunderstorms. SUNDAY NIGHT Southeast winds increasing to near 10 knots. Seas building to around 2 feet. Scattered showers and isolated thunderstorms. MONDAY East winds near 10 knots. Seas around 2 feet. Scattered showers and isolated thunderstorms. MONDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers and isolated thunderstorms. TUESDAY Northeast to east winds increasing to near 15 knots. Seas 2 to 4 feet. Scattered showers and isolated thunderstorms. TUESDAY NIGHT Northeast to east winds 15 to 20 knots. Seas building to 3 to 5 feet, occasionally to 6 feet. Scattered showers and isolated thunderstorms. WEDNESDAY Northeast to east winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Scattered showers and isolated thunderstorms. WEDNESDAY NIGHT Northeast to east winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Scattered showers and isolated thunderstorms. $$
GMZ053>055-073>075-041445- Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 NM- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM- Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas 20 to 60 NM out- 1038 PM EDT Fri Oct 3 2025 OVERNIGHT Northeast to east winds near 15 knots, becoming east to southeast 10 to 15 knots. Seas 3 to 6 feet, occasionally to 7 feet. Wave Detail: Northeast 4 feet at 6 seconds. Scattered showers and isolated thunderstorms. SATURDAY South to southwest winds near 10 knots, briefly decreasing to 5 to 10 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Wave Detail: Northeast 3 feet at 6 seconds. Scattered showers and isolated thunderstorms. SATURDAY NIGHT South winds near 10 knots, increasing to 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: East to southeast 2 feet at 6 seconds. Scattered showers and isolated thunderstorms. SUNDAY South to southwest winds near 10 knots, becoming southeast 5 to 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Scattered showers and isolated thunderstorms. SUNDAY NIGHT Southeast winds increasing to near 10 knots. Seas building to around 2 feet. Scattered showers and isolated thunderstorms. MONDAY East winds near 10 knots. Seas around 2 feet. Scattered showers and isolated thunderstorms. MONDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers and isolated thunderstorms. TUESDAY Northeast to east winds increasing to near 15 knots. Seas 2 to 4 feet. Scattered showers and isolated thunderstorms. TUESDAY NIGHT Northeast to east winds 15 to 20 knots. Seas building to 3 to 5 feet, occasionally to 6 feet. Scattered showers and isolated thunderstorms. WEDNESDAY Northeast to east winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Scattered showers and isolated thunderstorms. WEDNESDAY NIGHT Northeast to east winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Scattered showers and isolated thunderstorms. $$