GMZ005-180830-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
419 PM EDT Mon Aug 17 2026
.SYNOPSIS...
A nebulous flow pattern will support gentle breezes becoming
light and variable at times for the next several days. A Saharan
Air Layer will keep shower and thunderstorm chances at near-nil
through Tuesday night, with only a slight chance of rain and
thunder expected for Wednesday through Saturday.
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.
$$
GMZ033-034-180830- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 419 PM EDT Mon Aug 17 2026 TONIGHT Variable winds near 5 knots, becoming northwest to north. Seas 1 foot or less. TUESDAY Northwest to north winds 5 to 10 knots. Seas around 1 foot. Wave Detail: Northwest to north 1 foot at 3 seconds. TUESDAY NIGHT Northwest to north winds 5 to 10 knots. Seas around 1 foot. Wave Detail: Northwest to north 1 foot at 3 seconds. WEDNESDAY West to northwest winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers and thunderstorms. WEDNESDAY NIGHT West to northwest winds 5 to 10 knots, decreasing to near 5 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. THURSDAY West to northwest winds near 5 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. THURSDAY NIGHT Northwest to north winds near 5 knots, becoming variable. Seas around 1 foot. A slight chance of showers and thunderstorms. FRIDAY South to southwest winds near 5 knots, becoming variable. Seas around 1 foot. A slight chance of showers. FRIDAY NIGHT Variable winds near 5 knots, becoming southeast to south. Seas around 1 foot. A slight chance of showers and thunderstorms. SATURDAY South to southwest winds near 5 knots, becoming variable. Seas around 1 foot. A slight chance of showers. SATURDAY NIGHT Variable winds near 5 knots, becoming southeast to south. Seas 1 foot or less. A slight chance of showers and thunderstorms. $$
GMZ033-034-180830- 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 PM EDT Mon Aug 17 2026 TONIGHT Variable winds near 5 knots, becoming northwest to north. Seas 1 foot or less. TUESDAY Northwest to north winds 5 to 10 knots. Seas around 1 foot. Wave Detail: Northwest to north 1 foot at 3 seconds. TUESDAY NIGHT Northwest to north winds 5 to 10 knots. Seas around 1 foot. Wave Detail: Northwest to north 1 foot at 3 seconds. 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 around 1 foot. A slight chance of showers and thunderstorms. THURSDAY West to northwest winds near 5 knots. Seas around 1 foot. A slight chance of showers and thunderstorms. THURSDAY NIGHT Northwest to north winds near 5 knots, becoming variable. Seas around 1 foot. A slight chance of showers and thunderstorms. FRIDAY South to southwest winds near 5 knots, becoming variable. Seas around 1 foot. A slight chance of showers. FRIDAY NIGHT Variable winds near 5 knots, becoming southeast to south. Seas around 1 foot. A slight chance of showers and thunderstorms. SATURDAY South to southwest winds near 5 knots, becoming variable. Seas around 1 foot. A slight chance of showers. SATURDAY NIGHT Variable winds near 5 knots, becoming southeast to south. Seas 1 foot or less. A slight chance of showers and thunderstorms. $$