GMZ005-222130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
418 AM EST Thu Jan 22 2026
.SYNOPSIS...Gentle to moderate northeasterlies will persist across
the nearshore and offshore waters through the end of the work
week. Shower coverage will diminish today and tonight as winds
aloft direct a plume of moisture away from the Keys. Over the
weekend, breezes are expected to slacken to light to gentle. A
strong winter storm developing over the southeastern United States
is responsible for weakening the pressure gradient, and a cold
frontal passage associated with this system is expected sometime
Monday to Monday Night. Winds will rapidly clock north and freshen
to fresh to strong in its wake.
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>075-222130- 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- 418 AM EST Thu Jan 22 2026 SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL SEAS SUBSIDE TODAY Northeast to east winds near 15 knots, decreasing to northeast near 10 knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast to east 5 feet at 7 seconds. Scattered showers. TONIGHT Northeast to east winds near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 6 seconds. Isolated showers. FRIDAY Northeast to east winds near 10 knots. Seas 2 to 3 feet. Wave Detail: Northeast to east 2 feet at 4 seconds. Isolated showers. FRIDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers. SATURDAY East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. SATURDAY NIGHT East to southeast winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. SUNDAY East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. SUNDAY NIGHT East to southeast winds near 10 knots, becoming southeast to south 5 to 10 knots. Seas 2 to 3 feet. Isolated showers. MONDAY Southwest to west winds 5 to 10 knots, becoming northwest 10 to 15 knots. Seas around 2 feet, building to 2 to 4 feet, occasionally to 5 feet. Isolated showers. MONDAY NIGHT Northwest to north winds 15 to 20 knots, becoming north to northeast 20 to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet, building to 5 to 7 feet, occasionally to 9 feet. Isolated showers. $$
GMZ052>055-072>075-222130- 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- 418 AM EST Thu Jan 22 2026 SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL SEAS SUBSIDE TODAY Northeast to east winds near 15 knots, decreasing to northeast near 10 knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast to east 5 feet at 7 seconds. Scattered showers. TONIGHT Northeast to east winds near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 6 seconds. Isolated showers. FRIDAY Northeast to east winds near 10 knots. Seas 2 to 3 feet. Wave Detail: Northeast to east 2 feet at 4 seconds. Isolated showers. FRIDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers. SATURDAY East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. SATURDAY NIGHT East to southeast winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. SUNDAY East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. SUNDAY NIGHT East to southeast winds near 10 knots, becoming southeast to south 5 to 10 knots. Seas 2 to 3 feet. Isolated showers. MONDAY Southwest to west winds 5 to 10 knots, becoming northwest 10 to 15 knots. Seas around 2 feet, building to 2 to 4 feet, occasionally to 5 feet. Isolated showers. MONDAY NIGHT Northwest to north winds 15 to 20 knots, becoming north to northeast 20 to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet, building to 5 to 7 feet, occasionally to 9 feet. Isolated showers. $$