GMZ005-112130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
430 AM EST Thu Dec 11 2025
.SYNOPSIS...As high pressure drifts eastward over the next
several days and eventually into the western North Atlantic, winds
will clock around to the north to northeast, then eventually
northeast to east. The next frontal boundary is progged to push
through the Florida Keys marine zones on Sunday night, with fresh
to strong northeasterly breezes expected in the wake of the
frontal passage.
The Approximate Shoreward Edge of the Gulf Stream as of December 8...
15 NM South of Dry Tortugas Light...on Loggerhead Key.
13 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
14 NM South of Sand Key Light...off Key West.
18 NM South of Looe Key...off Big Pine Key.
23 NM Southeast of Sombrero Key Light...off Marathon.
18 NM Southeast of Alligator Reef Light...off Islamorada.
12 NM Southeast of Molasses Reef Light...off Key Largo.
8 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 and RTOFS.
$$
GMZ052>055-072>075-112130- Straits of Florida from Ocean Reef to Craig Key out 20 NM- Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 NM- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM- Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out- Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas 20 to 60 NM out- 430 AM EST Thu Dec 11 2025 TODAY North winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: North to northeast 2 feet at 5 seconds. TONIGHT Northeast winds near 10 knots. Seas 2 to 3 feet. Wave Detail: North 2 feet at 6 seconds and northeast 1 foot at 3 seconds. FRIDAY East winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Northeast to east 2 feet at 5 seconds and northwest 2 feet at 6 seconds. FRIDAY NIGHT East winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers. SATURDAY East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers. SATURDAY NIGHT East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers. SUNDAY Northeast winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered showers. SUNDAY NIGHT Northeast winds 10 to 15 knots, increasing to 15 to 20 knots. Seas building to 4 to 5 feet, occasionally to 6 feet. Isolated showers. MONDAY Northeast winds near 20 knots. Seas building to 5 to 7 feet, occasionally to 9 feet. Isolated showers. MONDAY NIGHT Northeast winds near 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Isolated showers. $$
GMZ052>055-072>075-112130- 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 Thu Dec 11 2025 TODAY North winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: North to northeast 2 feet at 5 seconds. TONIGHT Northeast winds near 10 knots. Seas 2 to 3 feet. Wave Detail: North 2 feet at 6 seconds and northeast 1 foot at 3 seconds. FRIDAY East winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Northeast to east 2 feet at 5 seconds and northwest 2 feet at 6 seconds. FRIDAY NIGHT East winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers. SATURDAY East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers. SATURDAY NIGHT East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers. SUNDAY Northeast winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered showers. SUNDAY NIGHT Northeast winds 10 to 15 knots, increasing to 15 to 20 knots. Seas building to 4 to 5 feet, occasionally to 6 feet. Isolated showers. MONDAY Northeast winds near 20 knots. Seas building to 5 to 7 feet, occasionally to 9 feet. Isolated showers. MONDAY NIGHT Northeast winds near 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Isolated showers. $$