Hazardous marine condition(s):
Short Term Forecast
GMZ005-052030-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
415 AM EDT Sun Apr 5 2026
.SYNOPSIS...Breezes will continue to slacken while the Atlantic
high weakens and moves further east. There is high confidence that
light to gentle breezes will persist through Tuesday. A high
pressure system descending into the Northern Plains on Tuesday
night will push a frontal boundary south towards the Florida Keys.
Considerable uncertainty surrounds where the front will stall, and
when breezes will freshen later this week. In contrast to the wind
field, there is high confidence for a chance of showers with a
slight chance of thunderstorms mid week.
The Approximate Shoreward Edge of the Gulf Stream as of April
4...
19 NM South of Dry Tortugas Light...on Loggerhead Key.
23 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
33 NM South of Sand Key Light...off Key West.
39 NM South of Looe Key...off Big Pine Key.
23 NM Southeast of Sombrero Key Light...off Marathon.
15 NM Southeast of Alligator Reef Light...off Islamorada.
10 NM Southeast of Molasses Reef Light...off Key Largo.
6 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>075-052030- 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- 415 AM EDT Sun Apr 5 2026 SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE TODAY East winds 15 to 20 knots, decreasing to near 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 5 feet at 6 seconds. A chance of showers. TONIGHT East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds. A chance of showers. MONDAY Northeast to east winds near 10 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. A slight chance of showers and thunderstorms. MONDAY NIGHT Northeast to east winds 5 to 10 knots. Seas 1 to 2 feet. A chance of showers with a slight chance of thunderstorms. TUESDAY Northeast winds 5 to 10 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. TUESDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. WEDNESDAY East winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. WEDNESDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. A chance of showers with a slight chance of thunderstorms. THURSDAY Northeast to east winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. A chance of showers with a slight chance of thunderstorms. THURSDAY NIGHT Northeast winds near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. A slight chance of showers. $$
GMZ052>055-072>075-052030- 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- 415 AM EDT Sun Apr 5 2026 SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE TODAY East winds 15 to 20 knots, decreasing to near 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 5 feet at 6 seconds. A chance of showers. TONIGHT East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds. A chance of showers. MONDAY Northeast to east winds near 10 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds. A slight chance of showers and thunderstorms. MONDAY NIGHT Northeast to east winds 5 to 10 knots. Seas 1 to 2 feet. A chance of showers with a slight chance of thunderstorms. TUESDAY Northeast winds 5 to 10 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. TUESDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. WEDNESDAY East winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. WEDNESDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. A chance of showers with a slight chance of thunderstorms. THURSDAY Northeast to east winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. A chance of showers with a slight chance of thunderstorms. THURSDAY NIGHT Northeast winds near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. A slight chance of showers. $$