Hazardous marine condition(s):
Marine Weather Statement
Small Craft Advisory
GMZ005-280930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
424 PM EST Thu Nov 27 2025
.SYNOPSIS...Breezes will back northwesterly to north tonight as a
cold front pushes across across south Florida. Post frontal
passage, breezes will rapidly freshen, and the fresh to strong
breezes will linger through the weekend. Small Craft Advisories
are likely required through the end of the weekend. Breezes will
gradually slacken over the beginning of next week. Shower activity
will wax and wane throughout the marine forecast period.
The Approximate Shoreward Edge of the Gulf Stream as of November
22...
35 NM South of Dry Tortugas Light...on Loggerhead Key.
12 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
6 NM South of Sand Key Light...off Key West.
7 NM South of Looe Key...off Big Pine Key.
8 NM Southeast of Sombrero Key Light...off Marathon.
9 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>075-280930- 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- 424 PM EST Thu Nov 27 2025 SMALL CRAFT ADVISORY IN EFFECT TONIGHT Variable winds 5 to 10 knots early, becoming northwest to north 15 to 20 knots this evening, then becoming north to northeast 20 to 25 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet, building to 4 to 6 feet, occasionally to 8 feet. Wave Detail: North to northeast 3 feet at 4 seconds, becoming north to northeast 5 feet at 5 seconds. Scattered showers. FRIDAY North to northeast winds near 25 knots. Seas building to 6 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast 8 feet at 7 seconds and northwest 4 feet at 8 seconds. Isolated showers. FRIDAY NIGHT North to northeast winds decreasing to 20 to 25 knots. Seas 7 to 9 feet, occasionally to 11 feet. Isolated showers. SATURDAY Northeast to east winds 20 to 25 knots, decreasing to near 20 knots. Seas 6 to 8 feet, occasionally to 10 feet. Scattered showers. SATURDAY NIGHT Northeast to east winds near 20 knots, becoming east and decreasing to 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Scattered showers. SUNDAY East winds decreasing to 10 to 15 knots. Seas subsiding to 4 to 6 feet, occasionally to 8 feet. Scattered showers. SUNDAY NIGHT East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. MONDAY East winds 10 to 15 knots. Seas subsiding to 1 to 3 feet. Isolated showers. MONDAY NIGHT East to southeast winds 10 to 15 knots. Seas 1 to 2 feet. TUESDAY Southeast to south winds near 10 knots, becoming southwest. Seas around 2 feet. TUESDAY NIGHT Northwest to north winds 5 to 10 knots. Seas 1 to 2 feet. Isolated showers. $$
GMZ052>055-072>075-280930- 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- 424 PM EST Thu Nov 27 2025 SMALL CRAFT ADVISORY IN EFFECT TONIGHT Variable winds 5 to 10 knots early, becoming northwest to north 15 to 20 knots this evening, then becoming north to northeast 20 to 25 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet, building to 4 to 6 feet, occasionally to 8 feet. Wave Detail: North to northeast 3 feet at 4 seconds, becoming north to northeast 5 feet at 5 seconds. Scattered showers. FRIDAY North to northeast winds near 25 knots. Seas building to 6 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast 8 feet at 7 seconds and northwest 4 feet at 8 seconds. Isolated showers. FRIDAY NIGHT North to northeast winds decreasing to 20 to 25 knots. Seas 7 to 9 feet, occasionally to 11 feet. Isolated showers. SATURDAY Northeast to east winds 20 to 25 knots, decreasing to near 20 knots. Seas 6 to 8 feet, occasionally to 10 feet. Scattered showers. SATURDAY NIGHT Northeast to east winds near 20 knots, becoming east and decreasing to 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Scattered showers. SUNDAY East winds decreasing to 10 to 15 knots. Seas subsiding to 4 to 6 feet, occasionally to 8 feet. Scattered showers. SUNDAY NIGHT East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. MONDAY East winds 10 to 15 knots. Seas subsiding to 1 to 3 feet. Isolated showers. MONDAY NIGHT East to southeast winds 10 to 15 knots. Seas 1 to 2 feet. TUESDAY Southeast to south winds near 10 knots, becoming southwest. Seas around 2 feet. TUESDAY NIGHT Northwest to north winds 5 to 10 knots. Seas 1 to 2 feet. Isolated showers. $$