GMZ005-262215-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
503 AM EST Mon Jan 26 2026
.SYNOPSIS...A strong cold front will push through Keys waters
beginning late today into tonight. Winds will start out light to
gentle out of the southwest, strengthening slightly through the
day as the tail end of a prefrontal trough advances eastward
across South Florida and the Keys. Expect winds to freshen
substantially as the front drives through Keys waters, becoming
strong, possibly gusting to around 30 knots. Winds are expected
to relax substantially on Tuesday as high pressure builds
southeastward through the southeast and across Florida. Additional
wind surges are becoming increasingly likely Tuesday night into
Wednesday night as a reinforcing cold front rolls southward across
the area.
The Approximate Shoreward Edge of the Gulf Stream as of January
18...
18 NM South of Dry Tortugas Light...on Loggerhead Key.
16 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
15 NM South of Sand Key Light...off Key West.
13 NM South of Looe Key...off Big Pine Key.
13 NM Southeast of Sombrero Key Light...off Marathon.
12 NM Southeast of Alligator Reef Light...off Islamorada.
7 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 and RTOFS.
$$
GMZ052>055-072>075-262215- 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- 503 AM EST Mon Jan 26 2026 TODAY Southwest to west winds near 10 knots, becoming west to northwest near 15 knots this afternoon. Seas 1 to 3 feet. Wave Detail: West to northwest 2 feet at 3 seconds and south to southwest 2 feet at 5 seconds. Isolated showers. TONIGHT Northwest to north winds increasing to near 25 knots. Seas 2 to 4 feet, occasionally to 5 feet, building to 5 to 8 feet, occasionally to 9 feet. Wave Detail: Northwest 4 feet at 5 seconds and east 1 foot at 4 seconds, becoming northwest to north 7 feet at 6 seconds. Isolated showers in the evening. TUESDAY North to northeast winds near 25 knots, decreasing to 15 to 20 knots in the afternoon. Seas 6 to 9 feet, occasionally to 11 feet. Wave Detail: Northwest 8 feet at 8 seconds. TUESDAY NIGHT North to northeast winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. WEDNESDAY North winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Isolated showers. WEDNESDAY NIGHT North winds near 20 knots. Seas 4 to 6 feet. Isolated showers. THURSDAY North winds near 20 knots, becoming north to northeast near 15 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet. THURSDAY NIGHT North to northeast winds near 15 knots. Seas 3 to 5 feet. Isolated showers. FRIDAY North to northeast winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 5 feet. Isolated showers. FRIDAY NIGHT North winds near 15 knots. Seas 3 to 5 feet, occasionally to 5 feet. Isolated showers. $$
GMZ052>055-072>075-262215- 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- 503 AM EST Mon Jan 26 2026 TODAY Southwest to west winds near 10 knots, becoming west to northwest near 15 knots this afternoon. Seas 1 to 3 feet. Wave Detail: West to northwest 2 feet at 3 seconds and south to southwest 2 feet at 5 seconds. Isolated showers. TONIGHT Northwest to north winds increasing to near 25 knots. Seas 2 to 4 feet, occasionally to 5 feet, building to 5 to 8 feet, occasionally to 9 feet. Wave Detail: Northwest 4 feet at 5 seconds and east 1 foot at 4 seconds, becoming northwest to north 7 feet at 6 seconds. Isolated showers in the evening. TUESDAY North to northeast winds near 25 knots, decreasing to 15 to 20 knots in the afternoon. Seas 6 to 9 feet, occasionally to 11 feet. Wave Detail: Northwest 8 feet at 8 seconds. TUESDAY NIGHT North to northeast winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. WEDNESDAY North winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Isolated showers. WEDNESDAY NIGHT North winds near 20 knots. Seas 4 to 6 feet. Isolated showers. THURSDAY North winds near 20 knots, becoming north to northeast near 15 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet. THURSDAY NIGHT North to northeast winds near 15 knots. Seas 3 to 5 feet. Isolated showers. FRIDAY North to northeast winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 5 feet. Isolated showers. FRIDAY NIGHT North winds near 15 knots. Seas 3 to 5 feet, occasionally to 5 feet. Isolated showers. $$