Hazardous marine condition(s):
Small Craft Advisory
GMZ005-292130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
424 AM EST Sat Nov 29 2025
.SYNOPSIS...A frontal boundary south of the area, paired with a
dominant surface high over the eastern CONUS, will maintain fresh
to strong northeasterly breezes today, and Small Craft Advisories
will likely extend through tonight. As the front decays and the
high shifts northeastward, breezes will begin to slacken by early
Sunday. Another cold front may be on the horizon for the middle of
the week, reflected in the breezes turning around the clock ahead
of it. Shower activity will wax and wane throughout the marine
forecast period.
The Approximate Shoreward Edge of the Gulf Stream as of November
28...
28 NM South of Dry Tortugas Light...on Loggerhead Key.
20 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
17 NM South of Sand Key Light...off Key West.
15 NM South of Looe Key...off Big Pine Key.
15 NM Southeast of Sombrero Key Light...off Marathon.
10 NM Southeast of Alligator Reef Light...off Islamorada.
9 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.
$$
GMZ052>055-072>075-292130- 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 AM EST Sat Nov 29 2025 SMALL CRAFT ADVISORY IN EFFECT TODAY Northeast to east winds 20 to 25 knots, increasing to near 25 knots. Seas 7 to 10 feet, occasionally to 13 feet. Wave Detail: Northeast to east 9 feet at 8 seconds and west to northwest 3 feet at 8 seconds. Scattered showers this morning, then widespread showers and isolated thunderstorms this afternoon. TONIGHT Northeast to east winds near 25 knots, decreasing to near 20 knots. Seas 8 to 10 feet, occasionally to 13 feet, subsiding to 6 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast to east 10 feet at 8 seconds and west to northwest 1 foot at 7 seconds, becoming east 9 feet at 8 seconds. Numerous showers and isolated thunderstorms. SUNDAY Northeast to east winds 15 to 20 knots, decreasing to near 15 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 3 to 5 feet, occasionally to 7 feet. Wave Detail: East 6 feet at 8 seconds. Scattered showers. SUNDAY NIGHT Northeast to east winds near 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Scattered showers. MONDAY Northeast to east winds near 15 knots, becoming east. Seas 3 to 4 feet, occasionally to 5 feet. Isolated showers. MONDAY NIGHT East winds near 15 knots, becoming east to southeast and decreasing to 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Isolated showers. TUESDAY Southeast to south winds 10 to 15 knots, becoming south to southwest and decreasing to 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to around 2 feet. Isolated showers. TUESDAY NIGHT West to northwest winds 5 to 10 knots, becoming northwest. Seas 1 to 2 feet. Isolated showers. WEDNESDAY North winds near 10 knots. Seas 1 to 2 feet. Isolated showers. WEDNESDAY NIGHT North to northeast winds 10 to 15 knots. Seas 1 to 3 feet. $$
GMZ052>055-072>075-292130- 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 AM EST Sat Nov 29 2025 SMALL CRAFT ADVISORY IN EFFECT TODAY Northeast to east winds 20 to 25 knots, increasing to near 25 knots. Seas 7 to 10 feet, occasionally to 13 feet. Wave Detail: Northeast to east 9 feet at 8 seconds and west to northwest 3 feet at 8 seconds. Scattered showers this morning, then widespread showers and isolated thunderstorms this afternoon. TONIGHT Northeast to east winds near 25 knots, decreasing to near 20 knots. Seas 8 to 10 feet, occasionally to 13 feet, subsiding to 6 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast to east 10 feet at 8 seconds and west to northwest 1 foot at 7 seconds, becoming east 9 feet at 8 seconds. Numerous showers and isolated thunderstorms. SUNDAY Northeast to east winds 15 to 20 knots, decreasing to near 15 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 3 to 5 feet, occasionally to 7 feet. Wave Detail: East 6 feet at 8 seconds. Scattered showers. SUNDAY NIGHT Northeast to east winds near 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Scattered showers. MONDAY Northeast to east winds near 15 knots, becoming east. Seas 3 to 4 feet, occasionally to 5 feet. Isolated showers. MONDAY NIGHT East winds near 15 knots, becoming east to southeast and decreasing to 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Isolated showers. TUESDAY Southeast to south winds 10 to 15 knots, becoming south to southwest and decreasing to 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to around 2 feet. Isolated showers. TUESDAY NIGHT West to northwest winds 5 to 10 knots, becoming northwest. Seas 1 to 2 feet. Isolated showers. WEDNESDAY North winds near 10 knots. Seas 1 to 2 feet. Isolated showers. WEDNESDAY NIGHT North to northeast winds 10 to 15 knots. Seas 1 to 3 feet. $$