Hazardous marine condition(s):
Special Marine Warning
Short Term Forecast
GMZ005-030230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1030 AM EDT Tue Sep 2 2025
.SYNOPSIS...A broad surface low situated along a stationary
front sits off the Florida East coast, east of Lake Okeechobee
with the Keys lying to the south of this boundary. This is
maintaining west to northwest winds across the Florida Keys
coastal waters. The low and front will remain rooted in place
through the next few days with undulating winds varying between
northwest and southwest. Localized wind surges will be possible
off the Upper Keys each afternoon starting today and going through
Thursday. In addition, abundant moisture will promote above
normal rain and thunder chances through the end of the week.
The Approximate Shoreward Edge of the Gulf Stream as of September 1...
41 NM South of Dry Tortugas Light...on Loggerhead Key.
30 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
9 NM South of Sand Key Light...off Key West.
8 NM South of Looe Key...off Big Pine Key.
7 NM Southeast of Sombrero Key Light...off Marathon.
6 NM Southeast of Alligator Reef Light...off Islamorada.
4 NM Southeast of Molasses Reef Light...off Key Largo.
4 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>075-030230- 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- 1030 AM EDT Tue Sep 2 2025 THIS AFTERNOON West to northwest winds 10 to 15 knots, increasing to near 15 knots in the afternoon. Seas around 2 feet, building to 2 to 3 feet. Wave Detail: West 1 foot at 4 seconds. Winds and seas higher in and around numerous showers and scattered thunderstorms. TONIGHT West to northwest winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 3 feet, subsiding to around 2 feet. Wave Detail: West 1 foot at 3 seconds. Numerous showers and scattered thunderstorms. WEDNESDAY West winds 10 to 15 knots. Seas around 2 feet. Wave Detail: West 2 feet at 3 seconds. Widespread showers and scattered thunderstorms. WEDNESDAY NIGHT West winds 10 to 15 knots. Seas around 2 feet. Numerous showers and scattered thunderstorms. THURSDAY Southwest to west winds near 15 knots. Seas 2 to 3 feet. Widespread showers and scattered thunderstorms. THURSDAY NIGHT Southwest to west winds decreasing to 10 to 15 knots. Seas subsiding to around 2 feet. Numerous showers and scattered thunderstorms. FRIDAY Southwest to west winds 10 to 15 knots. Seas around 2 feet. Widespread showers and scattered thunderstorms. FRIDAY NIGHT Southwest winds near 10 knots, decreasing to 5 to 10 knots. Seas subsiding to 1 to 2 feet. Scattered showers and thunderstorms. SATURDAY Southwest to west winds 5 to 10 knots. Seas around 1 foot. Scattered showers and thunderstorms. SATURDAY NIGHT Winds becoming east to southeast 5 to 10 knots. Seas around 1 foot. Scattered showers and thunderstorms. $$
GMZ053>055-073>075-030230- 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- 1030 AM EDT Tue Sep 2 2025 THIS AFTERNOON West to northwest winds 10 to 15 knots, increasing to near 15 knots in the afternoon. Seas around 2 feet, building to 2 to 3 feet. Wave Detail: West 1 foot at 4 seconds. Winds and seas higher in and around numerous showers and scattered thunderstorms. TONIGHT West to northwest winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 3 feet, subsiding to around 2 feet. Wave Detail: West 1 foot at 3 seconds. Numerous showers and scattered thunderstorms. WEDNESDAY West winds 10 to 15 knots. Seas around 2 feet. Wave Detail: West 2 feet at 3 seconds. Widespread showers and scattered thunderstorms. WEDNESDAY NIGHT West winds 10 to 15 knots. Seas around 2 feet. Numerous showers and scattered thunderstorms. THURSDAY Southwest to west winds near 15 knots. Seas 2 to 3 feet. Widespread showers and scattered thunderstorms. THURSDAY NIGHT Southwest to west winds decreasing to 10 to 15 knots. Seas subsiding to around 2 feet. Numerous showers and scattered thunderstorms. FRIDAY Southwest to west winds 10 to 15 knots. Seas around 2 feet. Widespread showers and scattered thunderstorms. FRIDAY NIGHT Southwest winds near 10 knots, decreasing to 5 to 10 knots. Seas subsiding to 1 to 2 feet. Scattered showers and thunderstorms. SATURDAY Southwest to west winds 5 to 10 knots. Seas around 1 foot. Scattered showers and thunderstorms. SATURDAY NIGHT Winds becoming east to southeast 5 to 10 knots. Seas around 1 foot. Scattered showers and thunderstorms. $$