Hazardous marine condition(s):
Short Term Forecast
GMZ005-092130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
430 AM EST Tue Dec 9 2025
.SYNOPSIS...Freshening north to northeast breezes are expected
today as a result of a frontal boundary that moved across the
Florida Keys overnight. The front will continue to linger across
the distant Straits of Florida through the afternoon therefore
higher shower coverage is expected in those waters. As the front
departs our waters, breezes will then fluctuate between gentle and
moderate during the week.
The Approximate Shoreward Edge of the Gulf Stream as
of December 4...
21 NM South of Dry Tortugas Light...on Loggerhead Key.
21 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
22 NM South of Sand Key Light...off Key West.
15 NM South of Looe Key...off Big Pine Key.
8 NM Southeast of Sombrero Key Light...off Marathon.
6 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>075-092130- 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- 430 AM EST Tue Dec 9 2025 SMALL CRAFT SHOULD EXERCISE CAUTION TODAY Northeast winds 15 to 20 knots. Seas building to 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northwest to north 2 feet at 4 seconds, becoming northeast 3 feet at 5 seconds. Scattered showers. TONIGHT Northeast to east winds near 15 knots, decreasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast to east 4 feet at 5 seconds and northwest 2 feet at 7 seconds. Scattered showers. WEDNESDAY North winds near 10 knots, decreasing to 5 to 10 knots. Seas decreasing to 2 to 3 feet. Wave Detail: Northeast to east 3 feet at 6 seconds and northwest 2 feet at 7 seconds. Scattered showers. WEDNESDAY NIGHT Northwest to north winds 5 to 10 knots. Seas around 2 feet. Isolated showers. THURSDAY North winds near 10 knots. Seas around 2 feet. Isolated showers. THURSDAY NIGHT Northeast winds near 10 knots. Seas around 2 feet. FRIDAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers. FRIDAY NIGHT East winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers. SATURDAY East winds 10 to 15 knots, increasing to near 15 knots. Seas 2 to 3 feet, building to 2 to 4 feet, occasionally 3 to 5 feet. Scattered showers. SATURDAY NIGHT Northeast to east winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Scattered showers. $$
GMZ052>055-072>075-092130- 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- 430 AM EST Tue Dec 9 2025 SMALL CRAFT SHOULD EXERCISE CAUTION TODAY Northeast winds 15 to 20 knots. Seas building to 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northwest to north 2 feet at 4 seconds, becoming northeast 3 feet at 5 seconds. Scattered showers. TONIGHT Northeast to east winds near 15 knots, decreasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast to east 4 feet at 5 seconds and northwest 2 feet at 7 seconds. Scattered showers. WEDNESDAY North winds near 10 knots, decreasing to 5 to 10 knots. Seas decreasing to 2 to 3 feet. Wave Detail: Northeast to east 3 feet at 6 seconds and northwest 2 feet at 7 seconds. Scattered showers. WEDNESDAY NIGHT Northwest to north winds 5 to 10 knots. Seas around 2 feet. Isolated showers. THURSDAY North winds near 10 knots. Seas around 2 feet. Isolated showers. THURSDAY NIGHT Northeast winds near 10 knots. Seas around 2 feet. FRIDAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers. FRIDAY NIGHT East winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers. SATURDAY East winds 10 to 15 knots, increasing to near 15 knots. Seas 2 to 3 feet, building to 2 to 4 feet, occasionally 3 to 5 feet. Scattered showers. SATURDAY NIGHT Northeast to east winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Scattered showers. $$