GMZ005-131430-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1029 PM EDT Tue May 12 2026
.SYNOPSIS...Breezes are light to gentle across the Florida Keys
waters. The lack of a strong pressure gradient suggests variable
conditions are possible at times tonight, but a shift towards
westerlies is expected by the morning. Local freshening of
breezes near South Florida is possible during the middle of the
week. Shower chances will remain on the lower side while drier air
masses linger over the Keys.
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>075-131430- 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- 1029 PM EDT Tue May 12 2026 OVERNIGHT Variable winds near 5 knots, becoming southwest. Seas around 1 foot. Wave Detail: East to southeast 1 foot at 4 seconds. A slight chance of showers and thunderstorms. WEDNESDAY Southwest to west winds near 5 knots, becoming west 10 to 15 knots. Seas around 1 foot. Wave Detail: West 1 foot at 2 seconds and east to southeast 1 foot at 4 seconds. A slight chance of showers and thunderstorms. WEDNESDAY NIGHT West winds 10 to 15 knots. Seas 1 to 2 feet. Wave Detail: West to northwest 1 foot at 3 seconds and east 1 foot at 3 seconds. A slight chance of showers and thunderstorms. THURSDAY West to northwest winds near 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. THURSDAY NIGHT Northwest to north winds 5 to 10 knots. Seas 1 to 2 feet. FRIDAY North winds 5 to 10 knots, becoming northeast to east near 5 knots. Seas around 1 foot. FRIDAY NIGHT Northeast to east winds near 5 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. SATURDAY East winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. SATURDAY NIGHT East winds near 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. SUNDAY East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. A slight chance of showers and thunderstorms. SUNDAY NIGHT East winds near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. A slight chance of showers and thunderstorms. $$
GMZ052>055-072>075-131430- 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- 1029 PM EDT Tue May 12 2026 OVERNIGHT Variable winds near 5 knots, becoming southwest. Seas around 1 foot. Wave Detail: East to southeast 1 foot at 4 seconds. A slight chance of showers and thunderstorms. WEDNESDAY Southwest to west winds near 5 knots, becoming west 10 to 15 knots. Seas around 1 foot. Wave Detail: West 1 foot at 2 seconds and east to southeast 1 foot at 4 seconds. A slight chance of showers and thunderstorms. WEDNESDAY NIGHT West winds 10 to 15 knots. Seas 1 to 2 feet. Wave Detail: West to northwest 1 foot at 3 seconds and east 1 foot at 3 seconds. A slight chance of showers and thunderstorms. THURSDAY West to northwest winds near 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. THURSDAY NIGHT Northwest to north winds 5 to 10 knots. Seas 1 to 2 feet. FRIDAY North winds 5 to 10 knots, becoming northeast to east near 5 knots. Seas around 1 foot. FRIDAY NIGHT Northeast to east winds near 5 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. SATURDAY East winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. SATURDAY NIGHT East winds near 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. SUNDAY East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. A slight chance of showers and thunderstorms. SUNDAY NIGHT East winds near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. A slight chance of showers and thunderstorms. $$