Hazardous marine condition(s):
Small Craft Advisory
GMZ005-292230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
526 AM EST Thu Jan 29 2026
.SYNOPSIS...Gentle to moderate, occasionally fresh, northerly
breezes will continue through Friday. A strong cold front will
blast through the Florida Keys marine zones on Saturday. Breezes
will back to the northwest and dramatically freshen in the wake of
the front. Confidence continues to increase for a period of gale-
force winds Saturday night into early Sunday, as high pressure
building across the Gulf Coast interacts with the front. While
breezes will slowly slacken Sunday through Monday, marine hazards
will continue.
The Approximate Shoreward Edge of the Gulf Stream as of January
28...
30 NM South of Dry Tortugas Light...on Loggerhead Key.
14 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
12 NM South of Sand Key Light...off Key West.
15 NM South of Looe Key...off Big Pine Key.
16 NM Southeast of Sombrero Key Light...off Marathon.
11 NM Southeast of Alligator Reef Light...off Islamorada.
7 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>075-292230- 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- 526 AM EST Thu Jan 29 2026 SMALL CRAFT ADVISORY IN EFFECT TODAY North to northeast winds near 20 knots, decreasing to 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: North 5 feet at 6 seconds. Isolated showers. TONIGHT Northeast winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast to east 5 feet at 6 seconds and northwest 2 feet at 5 seconds. Scattered showers. FRIDAY Northeast winds near 15 knots, becoming northwest to north and increasing to 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast to east 4 feet at 6 seconds. Scattered showers. FRIDAY NIGHT Northwest to north winds near 15 knots, becoming west to northwest and decreasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 2 to 4 feet, occasionally to 5 feet. Isolated showers. SATURDAY West to northwest winds 15 to 20 knots, becoming northwest and increasing to near 30 knots. Seas 3 to 5 feet, occasionally to 6 feet, building to 5 to 8 feet, occasionally to 10 feet. Numerous showers. SATURDAY NIGHT Northwest winds 30 to 35 knots, decreasing to near 30 knots. Seas 8 to 11 feet, occasionally to 14 feet, building to 9 to 13 feet, occasionally to 17 feet. Isolated showers. SUNDAY Northwest to north winds 25 to 30 knots, decreasing to near 25 knots. Seas 9 to 12 feet, occasionally to 15 feet, subsiding to 7 to 10 feet, occasionally to 13 feet. Isolated showers. SUNDAY NIGHT Northwest to north winds 20 to 25 knots, decreasing to near 20 knots. Seas 7 to 10 feet, occasionally to 13 feet, subsiding to 5 to 8 feet, occasionally to 10 feet. MONDAY Northwest to north winds near 20 knots, becoming north to northeast and decreasing to 15 to 20 knots. Seas 5 to 8 feet, occasionally to 10 feet, subsiding to 4 to 7 feet, occasionally to 9 feet. MONDAY NIGHT North to northeast winds 15 to 20 knots, decreasing to near 15 knots. Seas 4 to 7 feet, occasionally to 9 feet, subsiding to feet 3 to 6 feet, occasionally to 8 feet. $$
GMZ052>055-072>075-292230- 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- 526 AM EST Thu Jan 29 2026 SMALL CRAFT ADVISORY IN EFFECT TODAY North to northeast winds near 20 knots, decreasing to 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: North 5 feet at 6 seconds. Isolated showers. TONIGHT Northeast winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast to east 5 feet at 6 seconds and northwest 2 feet at 5 seconds. Scattered showers. FRIDAY Northeast winds near 15 knots, becoming northwest to north and increasing to 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast to east 4 feet at 6 seconds. Scattered showers. FRIDAY NIGHT Northwest to north winds near 15 knots, becoming west to northwest and decreasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 2 to 4 feet, occasionally to 5 feet. Isolated showers. SATURDAY West to northwest winds 15 to 20 knots, becoming northwest and increasing to near 30 knots. Seas 3 to 5 feet, occasionally to 6 feet, building to 5 to 8 feet, occasionally to 10 feet. Numerous showers. SATURDAY NIGHT Northwest winds 30 to 35 knots, decreasing to near 30 knots. Seas 8 to 11 feet, occasionally to 14 feet, building to 9 to 13 feet, occasionally to 17 feet. Isolated showers. SUNDAY Northwest to north winds 25 to 30 knots, decreasing to near 25 knots. Seas 9 to 12 feet, occasionally to 15 feet, subsiding to 7 to 10 feet, occasionally to 13 feet. Isolated showers. SUNDAY NIGHT Northwest to north winds 20 to 25 knots, decreasing to near 20 knots. Seas 7 to 10 feet, occasionally to 13 feet, subsiding to 5 to 8 feet, occasionally to 10 feet. MONDAY Northwest to north winds near 20 knots, becoming north to northeast and decreasing to 15 to 20 knots. Seas 5 to 8 feet, occasionally to 10 feet, subsiding to 4 to 7 feet, occasionally to 9 feet. MONDAY NIGHT North to northeast winds 15 to 20 knots, decreasing to near 15 knots. Seas 4 to 7 feet, occasionally to 9 feet, subsiding to feet 3 to 6 feet, occasionally to 8 feet. $$