GMZ005-170830-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
429 PM EDT Sun Aug 16 2026
.SYNOPSIS...Generally gentle east to southeast breezes will become
light and variable at times across the local waters over the next
few days as ridging remains the dominant weather feature across
the area. Northward movement of the subtropical ridge away from
the Keys will allow a col region to set up between Florida and
Cuba. Shower coverage will be kept far below normal because of a
Saharan Air Layer moving over the Keys waters.
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.
$$
GMZ033-034-170830- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 429 PM EDT Sun Aug 16 2026 TONIGHT East winds near 10 knots early, decreasing to 5 to 10 knots. Seas 1 foot or less. Wave Detail: East 1 foot at 3 seconds. MONDAY East winds 5 to 10 knots, becoming north to northeast. Seas 1 foot or less. Wave Detail: East 1 foot at 3 seconds. MONDAY NIGHT North to northeast winds near 5 knots. Seas 1 foot or less. TUESDAY North winds near 5 knots, becoming northwest to north. Seas 1 foot or less. TUESDAY NIGHT Northwest winds 5 to 10 knots, decreasing to near 5 knots. Seas around 1 foot. WEDNESDAY West to northwest winds near 5 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. WEDNESDAY NIGHT West to northwest winds 5 to 10 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. THURSDAY West winds near 5 knots. Seas around 1 foot. A slight chance of showers. THURSDAY NIGHT West to northwest winds near 5 knots, becoming variable. Seas around 1 foot. A slight chance of showers and thunderstorms. FRIDAY Variable winds near 5 knots, becoming east to southeast. Seas around 1 foot. A slight chance of showers. FRIDAY NIGHT East to southeast winds near 5 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. $$
GMZ033-034-170830- 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- 429 PM EDT Sun Aug 16 2026 TONIGHT East winds near 10 knots early, decreasing to 5 to 10 knots. Seas 1 foot or less. Wave Detail: East 1 foot at 3 seconds. MONDAY East winds 5 to 10 knots, becoming north to northeast. Seas 1 foot or less. Wave Detail: East 1 foot at 3 seconds. MONDAY NIGHT North to northeast winds near 5 knots. Seas 1 foot or less. TUESDAY North winds near 5 knots, becoming northwest to north. Seas 1 foot or less. TUESDAY NIGHT Northwest winds 5 to 10 knots, decreasing to near 5 knots. Seas around 1 foot. WEDNESDAY West to northwest winds near 5 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. WEDNESDAY NIGHT West to northwest winds 5 to 10 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. THURSDAY West winds near 5 knots. Seas around 1 foot. A slight chance of showers. THURSDAY NIGHT West to northwest winds near 5 knots, becoming variable. Seas around 1 foot. A slight chance of showers and thunderstorms. FRIDAY Variable winds near 5 knots, becoming east to southeast. 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. $$