GMZ005-172030-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
419 AM EDT Mon Aug 17 2026
.SYNOPSIS...A col region is setting up across the Florida Keys
early this week. Generally gentle east to southeasterly breezes
will become light and variable at times during the week.
Westerlies are possible later this week in the event the col
region is forced south towards Cuba. A Saharan Air Layer will keep
showers suppressed during the first half of the week.
The Approximate Shoreward Edge of the Gulf Stream as of
August 13, 2026...
38 NM South of Dry Tortugas Light...on Loggerhead Key.
20 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
17 NM South of Sand Key Light...off Key West.
21 NM South of Looe Key...off Big Pine Key.
18 NM Southeast of Sombrero Key Light...off Marathon.
7 NM Southeast of Alligator Reef Light...off Islamorada.
7 NM Southeast of Molasses Reef Light...off Key Largo.
2 NM Southeast 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.
$$
GMZ033-034-172030- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 419 AM EDT Mon Aug 17 2026 TODAY East winds 5 to 10 knots, becoming north to northeast near 5 knots. Seas around 1 foot. Wave Detail: East to southeast 1 foot at 3 seconds. TONIGHT North to northeast winds near 5 knots. Seas 1 foot or less. TUESDAY Northwest to north winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: Northwest to north 1 foot at 3 seconds. TUESDAY NIGHT Northwest to north winds 5 to 10 knots. Seas around 1 foot. WEDNESDAY West to northwest winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. WEDNESDAY NIGHT West to northwest winds 5 to 10 knots, decreasing to near 5 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. THURSDAY West to northwest winds near 5 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. THURSDAY NIGHT Northwest to north winds near 5 knots, becoming variable. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. FRIDAY Southeast to south winds near 5 knots. Seas around 1 foot. A slight chance of showers. FRIDAY NIGHT East to southeast winds near 5 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. $$
GMZ033-034-172030- 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- 419 AM EDT Mon Aug 17 2026 TODAY East winds 5 to 10 knots, becoming north to northeast near 5 knots. Seas around 1 foot. Wave Detail: East to southeast 1 foot at 3 seconds. TONIGHT North to northeast winds near 5 knots. Seas 1 foot or less. TUESDAY Northwest to north winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: Northwest to north 1 foot at 3 seconds. TUESDAY NIGHT Northwest to north winds 5 to 10 knots. Seas around 1 foot. WEDNESDAY West to northwest winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. WEDNESDAY NIGHT West to northwest winds 5 to 10 knots, decreasing to near 5 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. THURSDAY West to northwest winds near 5 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. THURSDAY NIGHT Northwest to north winds near 5 knots, becoming variable. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. FRIDAY Southeast to south winds near 5 knots. Seas around 1 foot. A slight chance of showers. FRIDAY NIGHT East to southeast winds near 5 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. $$