Hazardous marine condition(s):
Short Term Forecast
GMZ005-191430-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1026 PM EDT Mon May 18 2026
.SYNOPSIS...Surface high pressure centered north of Bermuda will
continue to promote moderate to fresh east to southeast breezes
through the next couple of days. Highest breezes will prevail
through Tuesday evening. Breezes then undergo a very slow
slackening process before the weekend with peaks expected during
the evenings and lulls during the day. Rain and thunder chances
will remain above normal through much of the week.
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.
$$
GMZ052>055-072>075-191430- 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- 1026 PM EDT Mon May 18 2026 SMALL CRAFT SHOULD EXERCISE CAUTION OVERNIGHT East winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 6 seconds. A chance of showers with a slight chance of thunderstorms. TUESDAY East winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds. A chance of showers with a slight chance of thunderstorms. TUESDAY NIGHT East winds 15 to 20 knots, decreasing to near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms. WEDNESDAY East winds near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. A slight chance of showers and thunderstorms. WEDNESDAY NIGHT East winds near 15 knots, decreasing to 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. A slight chance of showers and thunderstorms. THURSDAY East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. A slight chance of showers and thunderstorms. THURSDAY NIGHT East to southeast winds near 10 knots. Seas 2 to 3 feet. A slight chance of showers and thunderstorms. FRIDAY East to southeast winds near 10 knots. Seas around 2 feet. A slight chance of showers. FRIDAY NIGHT East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. A slight chance of showers and thunderstorms. SATURDAY East to southeast winds near 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. SATURDAY NIGHT East winds 10 to 15 knots. Seas 1 to 2 feet. A chance of showers with a slight chance of thunderstorms. $$
GMZ052>055-072>075-191430- 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- 1026 PM EDT Mon May 18 2026 SMALL CRAFT SHOULD EXERCISE CAUTION OVERNIGHT East winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 6 seconds. A chance of showers with a slight chance of thunderstorms. TUESDAY East winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds. A chance of showers with a slight chance of thunderstorms. TUESDAY NIGHT East winds 15 to 20 knots, decreasing to near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms. WEDNESDAY East winds near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. A slight chance of showers and thunderstorms. WEDNESDAY NIGHT East winds near 15 knots, decreasing to 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. A slight chance of showers and thunderstorms. THURSDAY East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. A slight chance of showers and thunderstorms. THURSDAY NIGHT East to southeast winds near 10 knots. Seas 2 to 3 feet. A slight chance of showers and thunderstorms. FRIDAY East to southeast winds near 10 knots. Seas around 2 feet. A slight chance of showers. FRIDAY NIGHT East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. A slight chance of showers and thunderstorms. SATURDAY East to southeast winds near 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. SATURDAY NIGHT East winds 10 to 15 knots. Seas 1 to 2 feet. A chance of showers with a slight chance of thunderstorms. $$