Hazardous marine condition(s):
Short Term Forecast
GMZ005-272115-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
415 AM EST Thu Nov 27 2025
.SYNOPSIS...A weak pressure field across the area will encourage
light to gentle east to southeast breezes this morning, but a cold
front pushing down the Florida peninsula will arrive to our marine
zones late tonight. Breezes will back to the north and freshen
quickly, and the lingering front will maintain fresh to strong
breezes through the weekend. Small Craft Advisories will be
needed by tonight, and will likely need to be extended through the
end of the weekend. Breezes will gradually slacken over the
beginning of next week. Shower activity will wax and wane
throughout the marine forecast period.
The Approximate Shoreward Edge of the Gulf Stream as of November
22...
35 NM South of Dry Tortugas Light...on Loggerhead Key.
12 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
6 NM South of Sand Key Light...off Key West.
7 NM South of Looe Key...off Big Pine Key.
8 NM Southeast of Sombrero Key Light...off Marathon.
9 NM Southeast of Alligator Reef Light...off Islamorada.
3 NM Southeast of Molasses Reef Light...off Key Largo.
1 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.
$$
GMZ052>055-072>075-272115- Straits of Florida from Ocean Reef to Craig Key out 20 NM- 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 Ocean Reef to Craig Key 20 to 60 NM out- 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- 415 AM EST Thu Nov 27 2025 SMALL CRAFT ADVISORY LIKELY WILL BE REQUIRED TONIGHT TODAY East to southeast winds near 10 knots, becoming north to northeast and increasing to 10 to 15 knots. Seas 1 to 2 feet, except building to 2 to 3 feet west of Halfmoon Shoal Light. Wave Detail: East to southeast 2 feet at 4 seconds. Scattered showers and isolated thunderstorms. TONIGHT North winds 15 to 20 knots, becoming north to northeast and increasing to 20 to 25 knots late. Seas 2 to 4 feet, occasionally to 5 feet, building to 4 to 6 feet, occasionally to 8 feet. Wave Detail: North to northeast 3 feet at 4 seconds, becoming north to northeast 5 feet at 5 seconds. Scattered showers. FRIDAY North to northeast winds near 25 knots. Seas building to 6 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast 8 feet at 7 seconds and northwest 4 feet at 8 seconds. Isolated showers. FRIDAY NIGHT North to northeast winds decreasing to 20 to 25 knots. Seas 7 to 9 feet, occasionally to 11 feet. Isolated showers. SATURDAY Northeast to east winds 20 to 25 knots, decreasing to near 20 knots. Seas 6 to 8 feet, occasionally to 10 feet. Scattered showers. SATURDAY NIGHT Northeast to east winds near 20 knots, becoming east and decreasing to 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Scattered showers. SUNDAY East winds decreasing to 10 to 15 knots. Seas subsiding to 4 to 6 feet, occasionally to 8 feet. Scattered showers. SUNDAY NIGHT East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. MONDAY East winds 10 to 15 knots. Seas subsiding to 1 to 3 feet. Isolated showers. MONDAY NIGHT East to southeast winds 10 to 15 knots. Seas 1 to 2 feet. $$
GMZ052>055-072>075-272115- Straits of Florida from Ocean Reef to Craig Key out 20 NM- 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 Ocean Reef to Craig Key 20 to 60 NM out- 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- 415 AM EST Thu Nov 27 2025 SMALL CRAFT ADVISORY LIKELY WILL BE REQUIRED TONIGHT TODAY East to southeast winds near 10 knots, becoming north to northeast and increasing to 10 to 15 knots. Seas 1 to 2 feet, except building to 2 to 3 feet west of Halfmoon Shoal Light. Wave Detail: East to southeast 2 feet at 4 seconds. Scattered showers and isolated thunderstorms. TONIGHT North winds 15 to 20 knots, becoming north to northeast and increasing to 20 to 25 knots late. Seas 2 to 4 feet, occasionally to 5 feet, building to 4 to 6 feet, occasionally to 8 feet. Wave Detail: North to northeast 3 feet at 4 seconds, becoming north to northeast 5 feet at 5 seconds. Scattered showers. FRIDAY North to northeast winds near 25 knots. Seas building to 6 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast 8 feet at 7 seconds and northwest 4 feet at 8 seconds. Isolated showers. FRIDAY NIGHT North to northeast winds decreasing to 20 to 25 knots. Seas 7 to 9 feet, occasionally to 11 feet. Isolated showers. SATURDAY Northeast to east winds 20 to 25 knots, decreasing to near 20 knots. Seas 6 to 8 feet, occasionally to 10 feet. Scattered showers. SATURDAY NIGHT Northeast to east winds near 20 knots, becoming east and decreasing to 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Scattered showers. SUNDAY East winds decreasing to 10 to 15 knots. Seas subsiding to 4 to 6 feet, occasionally to 8 feet. Scattered showers. SUNDAY NIGHT East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. MONDAY East winds 10 to 15 knots. Seas subsiding to 1 to 3 feet. Isolated showers. MONDAY NIGHT East to southeast winds 10 to 15 knots. Seas 1 to 2 feet. $$