GMZ005-180930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
423 PM EST Sat Jan 17 2026
.SYNOPSIS...High pressure centered over the western North Atlantic
will slowly loosen its grip across Florida tonight. As a result,
breezes will continue to slacken. The next cold front is progged
to push through the Florida Keys coastal waters on Sunday. Fresh
to strong northerly breezes are forecast in its wake for the
early to the middle part of next week. An expansive high pressure
system will then move across the eastern United States. This will
continue to promote fresh to strong breezes through the week.
The Approximate Shoreward Edge of the Gulf Stream as of January
12...
19 NM South of Dry Tortugas Light...on Loggerhead Key.
13 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
15 NM South of Sand Key Light...off Key West.
17 NM South of Looe Key...off Big Pine Key.
17 NM Southeast of Sombrero Key Light...off Marathon.
15 NM Southeast of Alligator Reef Light...off Islamorada.
10 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 and RTOFS.
$$
GMZ052>055-072>075-180930- 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- 423 PM EST Sat Jan 17 2026 SMALL CRAFT ADVISORY LIKELY WILL BE REQUIRED SUNDAY TONIGHT Northeast winds near 10 knots, decreasing to 5 to 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Wave Detail: Northeast to east 2 feet at 5 seconds and west to northwest 1 foot at 7 seconds. Isolated showers. SUNDAY North to northeast winds 5 to 10 knots, becoming northwest to north 20 to 25 knots in the afternoon. Seas 1 to 2 feet, building to 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 2 feet at 4 seconds, becoming north to northeast 3 feet at 4 seconds. Scattered showers. SUNDAY NIGHT Northwest to north winds near 25 knots, decreasing to 20 to 25 knots, becoming north. Seas 5 to 8 feet, occasionally to 10 feet. Isolated showers. MONDAY North winds 20 to 25 knots, becoming north to northeast. Seas 5 to 8 feet, occasionally to 10 feet. Isolated showers. MONDAY NIGHT North to northeast winds near 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Isolated showers. TUESDAY North to northeast winds 20 to 25 knots, increasing to near 25 knots. Seas 5 to 8 feet, occasionally to 10 feet. Isolated showers. TUESDAY NIGHT Northeast winds near 25 knots. Seas 7 to 10 feet, occasionally to 13 feet. Isolated showers. WEDNESDAY Northeast to east winds near 25 knots. Seas 7 to 10 feet, occasionally to 13 feet. Isolated showers. WEDNESDAY NIGHT Northeast to east winds 20 to 25 knots, becoming east near 20 knots. Seas 6 to 9 feet, occasionally to 11 feet. Scattered showers. THURSDAY East to southeast winds 15 to 20 knots, becoming 10 to 15 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 2 to 4 feet, occasionally to 5 feet in the afternoon. Scattered showers. THURSDAY NIGHT Northeast to east winds 5 to 10 knots. Seas 2 to 3 feet. Scattered showers. $$
GMZ052>055-072>075-180930- 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- 423 PM EST Sat Jan 17 2026 SMALL CRAFT ADVISORY LIKELY WILL BE REQUIRED SUNDAY TONIGHT Northeast winds near 10 knots, decreasing to 5 to 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Wave Detail: Northeast to east 2 feet at 5 seconds and west to northwest 1 foot at 7 seconds. Isolated showers. SUNDAY North to northeast winds 5 to 10 knots, becoming northwest to north 20 to 25 knots in the afternoon. Seas 1 to 2 feet, building to 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 2 feet at 4 seconds, becoming north to northeast 3 feet at 4 seconds. Scattered showers. SUNDAY NIGHT Northwest to north winds near 25 knots, decreasing to 20 to 25 knots, becoming north. Seas 5 to 8 feet, occasionally to 10 feet. Isolated showers. MONDAY North winds 20 to 25 knots, becoming north to northeast. Seas 5 to 8 feet, occasionally to 10 feet. Isolated showers. MONDAY NIGHT North to northeast winds near 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Isolated showers. TUESDAY North to northeast winds 20 to 25 knots, increasing to near 25 knots. Seas 5 to 8 feet, occasionally to 10 feet. Isolated showers. TUESDAY NIGHT Northeast winds near 25 knots. Seas 7 to 10 feet, occasionally to 13 feet. Isolated showers. WEDNESDAY Northeast to east winds near 25 knots. Seas 7 to 10 feet, occasionally to 13 feet. Isolated showers. WEDNESDAY NIGHT Northeast to east winds 20 to 25 knots, becoming east near 20 knots. Seas 6 to 9 feet, occasionally to 11 feet. Scattered showers. THURSDAY East to southeast winds 15 to 20 knots, becoming 10 to 15 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 2 to 4 feet, occasionally to 5 feet in the afternoon. Scattered showers. THURSDAY NIGHT Northeast to east winds 5 to 10 knots. Seas 2 to 3 feet. Scattered showers. $$