GMZ005-302045-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
436 AM EDT Thu Apr 30 2026
.SYNOPSIS...High pressure will retreat into the Atlantic today as
a weak low pushes off the Atlantic coast. This will result in
light southeasterlies becoming variable. Another weak low will
push across Florida late this week and into the weekend, likely
supporting a short period of gentle to moderate southeasterly
breezes. Winds should slacken again later in the weekend as the
pressure gradient flattens. A weak disturbance in the Gulf
coupled with increased moisture will supported elevated rain and
thunder chances for late in the weekend and into early net week.
The Approximate Shoreward Edge of the Gulf Stream as of April 28...
16 NM South of Dry Tortugas Light...on Loggerhead Key.
10 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
9 NM South of Sand Key Light...off Key West.
9 NM South of Looe Key...off Big Pine Key.
12 NM Southeast of Sombrero Key Light...off Marathon.
10 NM Southeast of Alligator Reef Light...off Islamorada.
6 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.
$$
GMZ052>055-072>075-302045- Straits of Florida from Ocean Reef to Craig Key out 20 NM- Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 NM- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM- Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out- Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas 20 to 60 NM out- 436 AM EDT Thu Apr 30 2026 TODAY Southeast winds 5 to 10 knots, becoming variable. Seas 1 to 2 feet. Wave Detail: Southeast 2 feet at 4 seconds. TONIGHT Variable winds 5 to 10 knots. Seas around 1 foot. Wave Detail: East 1 foot at 4 seconds. FRIDAY Variable winds 5 to 10 knots. Seas around 1 foot. Wave Detail: Southeast 1 foot at 4 seconds. FRIDAY NIGHT Variable winds 5 to 10 knots, becoming southeast near 15 knots. Seas building to 2 to 3 feet. SATURDAY South winds 10 to 15 knots, becoming variable 5 to 10 knots in the afternoon. Seas 2 to 3 feet. SATURDAY NIGHT Winds becoming south 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. SUNDAY Southwest to west winds 5 to 10 knots, becoming northwest near 10 knots in the afternoon. Seas 1 to 2 feet. A chance of showers and thunderstorms. SUNDAY NIGHT North to northeast winds 10 to 15 knots, becoming northeast 5 to 10 knots. Seas 2 to 3 feet. A chance of showers and thunderstorms. MONDAY North to northeast winds 5 to 10 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. MONDAY NIGHT Northeast winds 5 to 10 knots, becoming east to southeast. Seas around 2 feet. A slight chance of showers and thunderstorms. $$
GMZ052>055-072>075-302045- 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- 436 AM EDT Thu Apr 30 2026 TODAY Southeast winds 5 to 10 knots, becoming variable. Seas 1 to 2 feet. Wave Detail: Southeast 2 feet at 4 seconds. TONIGHT Variable winds 5 to 10 knots. Seas around 1 foot. Wave Detail: East 1 foot at 4 seconds. FRIDAY Variable winds 5 to 10 knots. Seas around 1 foot. Wave Detail: Southeast 1 foot at 4 seconds. FRIDAY NIGHT Variable winds 5 to 10 knots, becoming southeast near 15 knots. Seas building to 2 to 3 feet. SATURDAY South winds 10 to 15 knots, becoming variable 5 to 10 knots in the afternoon. Seas 2 to 3 feet. SATURDAY NIGHT Winds becoming south 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. SUNDAY Southwest to west winds 5 to 10 knots, becoming northwest near 10 knots in the afternoon. Seas 1 to 2 feet. A chance of showers and thunderstorms. SUNDAY NIGHT North to northeast winds 10 to 15 knots, becoming northeast 5 to 10 knots. Seas 2 to 3 feet. A chance of showers and thunderstorms. MONDAY North to northeast winds 5 to 10 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. MONDAY NIGHT Northeast winds 5 to 10 knots, becoming east to southeast. Seas around 2 feet. A slight chance of showers and thunderstorms. $$