GMZ005-212030-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
418 AM EDT Sun Jun 21 2026
.SYNOPSIS...A broad, weak high pressure is centered over the
Florida Peninsula. This will maintain a weakened pressure field
across the Florida Keys and surrounding coastal waters. As a
result, expect winds to be highly variable due to convection
developing across South Florida during the afternoon and moving
into our waters during the evening and overnight. Thereafter the
high will flux in strength, resulting in breezes periodically
entering peaks and lulls.
The Approximate Shoreward Edge of the Gulf Stream as of June 15...
28 NM South of Dry Tortugas Light...on Loggerhead Key.
12 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
11 NM South of Sand Key Light...off Key West.
14 NM South of Looe Key...off Big Pine Key.
13 NM Southeast of Sombrero Key Light...off Marathon.
8 NM Southeast of Alligator Reef Light...off Islamorada.
4 NM Southeast of Molasses Reef Light...off Key Largo.
3 NM East of Carysfort Reef Light...off Ocean Reef.
Gulf Stream Information Courtesy of the National Weather Service in
Key West, using data from RTOFS and NASA SPoRT SST.
$$
GMZ033-034-212030- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 418 AM EDT Sun Jun 21 2026 TODAY Southeast to south winds 5 to 10 knots, becoming northwest to north and briefly decreasing to near 5 knots. Seas around 1 foot. Wave Detail: Southeast 1 foot at 3 seconds and west 1 foot at 4 seconds. A slight chance of showers and thunderstorms. TONIGHT North to northeast winds 5 to 10 knots, becoming east to southeast after midnight. Seas around 1 foot. Wave Detail: East 1 foot at 3 seconds. A slight chance of showers and thunderstorms. MONDAY East to southeast winds 5 to 10 knots. Seas around 1 foot. Wave Detail: East to southeast 1 foot at 3 seconds. A slight chance of showers and thunderstorms. MONDAY NIGHT Northeast to east winds 5 to 10 knots, becoming east to southeast near 10 knots. Seas around 1 foot, building to 1 to 2 feet. A slight chance of showers and thunderstorms. TUESDAY Southeast winds 5 to 10 knots. Seas 1 to 2 feet, subsiding to around 1 foot. A slight chance of showers and thunderstorms. TUESDAY NIGHT Northeast to east winds 5 to 10 knots. Seas subsiding to 1 foot or less. A slight chance of showers and thunderstorms. WEDNESDAY East winds near 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms. WEDNESDAY NIGHT Northeast to east winds near 5 knots, becoming east to southeast 5 to 10 knots. Seas building to around 1 foot. A slight chance of showers and thunderstorms. THURSDAY East to southeast winds 5 to 10 knots. Seas around 1 foot. THURSDAY NIGHT East to southeast winds near 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. $$
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- 418 AM EDT Sun Jun 21 2026 TODAY Southeast to south winds 5 to 10 knots, becoming northwest to north and briefly decreasing to near 5 knots. Seas around 1 foot. Wave Detail: Southeast 1 foot at 3 seconds and west 1 foot at 4 seconds. A slight chance of showers and thunderstorms. TONIGHT North to northeast winds 5 to 10 knots, becoming east to southeast after midnight. Seas around 1 foot. Wave Detail: East 1 foot at 3 seconds. A slight chance of showers and thunderstorms. MONDAY East to southeast winds 5 to 10 knots. Seas around 1 foot. Wave Detail: East to southeast 1 foot at 3 seconds. A slight chance of showers and thunderstorms. MONDAY NIGHT Northeast to east winds 5 to 10 knots, becoming east to southeast near 10 knots. Seas around 1 foot, building to 1 to 2 feet. A slight chance of showers and thunderstorms. TUESDAY Southeast winds 5 to 10 knots. Seas 1 to 2 feet, subsiding to around 1 foot. A slight chance of showers and thunderstorms. TUESDAY NIGHT Northeast to east winds 5 to 10 knots. Seas subsiding to 1 foot or less. A slight chance of showers and thunderstorms. WEDNESDAY East winds near 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms. WEDNESDAY NIGHT Northeast to east winds near 5 knots, becoming east to southeast 5 to 10 knots. Seas building to around 1 foot. A slight chance of showers and thunderstorms. THURSDAY East to southeast winds 5 to 10 knots. Seas around 1 foot. THURSDAY NIGHT East to southeast winds near 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. $$