Hazardous marine condition(s):
Short Term Forecast
GMZ005-212030-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
428 AM EDT Thu May 21 2026
.SYNOPSIS...High pressure centered near Bermuda will maintain east
to southeast gentle to moderate breezes today. This regime will
continue for the next few days with breezes peaking in the evening
and overnight and lulling by day. Some strengthening of this high
over the holiday weekend will lead breezes becoming moderate to
fresh once again.
The Approximate Shoreward Edge of the Gulf Stream as of May 12...
35 NM South of Dry Tortugas Light...on Loggerhead Key.
9 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.
6 NM Southeast of Sombrero Key Light...off Marathon.
6 NM Southeast of Alligator Reef Light...off Islamorada.
4 NM Southeast of Molasses Reef Light...off Key Largo.
3 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.
$$
GMZ033-034-212030- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 428 AM EDT Thu May 21 2026 TODAY East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 4 seconds. A chance of showers with a slight chance of thunderstorms. TONIGHT East to southeast winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 2 to 3 feet, building to 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 2 feet at 4 seconds. A slight chance of showers and thunderstorms. FRIDAY East to southeast winds near 15 knots, decreasing briefly to 10 to 15 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Wave Detail: East 2 feet at 4 seconds. A chance of showers with a slight chance of thunderstorms. FRIDAY NIGHT East to southeast winds near 15 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. SATURDAY East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. SATURDAY NIGHT East winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 2 to 3 feet, building to 2 to 4 feet, occasionally to 5 feet. A chance of showers with a slight chance of thunderstorms. SUNDAY AND SUNDAY NIGHT East to southeast winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. A chance of showers with a slight chance of thunderstorms. MONDAY East to southeast winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. A slight chance of showers and thunderstorms. MONDAY NIGHT East to southeast winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. A chance of showers and thunderstorms. $$
GMZ033-034-212030- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 428 AM EDT Thu May 21 2026 TODAY East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 4 seconds. A chance of showers with a slight chance of thunderstorms. TONIGHT East to southeast winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 2 to 3 feet, building to 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 2 feet at 4 seconds. A slight chance of showers and thunderstorms. FRIDAY East to southeast winds near 15 knots, decreasing briefly to 10 to 15 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Wave Detail: East 2 feet at 4 seconds. A chance of showers with a slight chance of thunderstorms. FRIDAY NIGHT East to southeast winds near 15 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. SATURDAY East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. SATURDAY NIGHT East winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 2 to 3 feet, building to 2 to 4 feet, occasionally to 5 feet. A chance of showers with a slight chance of thunderstorms. SUNDAY AND SUNDAY NIGHT East to southeast winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. A chance of showers with a slight chance of thunderstorms. MONDAY East to southeast winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. A slight chance of showers and thunderstorms. MONDAY NIGHT East to southeast winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. A chance of showers and thunderstorms. $$