Hazardous marine condition(s):
Short Term Forecast
GMZ005-301500-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1053 PM EDT Fri Aug 29 2025
.SYNOPSIS...An early season Canadian high pressure system will
continue to traverse across the eastern United States and move
into the Atlantic over the next few days. This will allow for
breezes to remain light through the weekend. Pressure gradient
across the Gulf including Florida and the Florida Keys will
increase early next week, resulting in freshening breezes.
Moisture will increase as well, supporting higher shower and
thunderstorm coverage through early next week.
The Approximate Shoreward Edge of the Gulf Stream as of August 21...
20 NM South of Dry Tortugas Light...on Loggerhead Key.
9 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
9 NM South of Sand Key Light...off Key West.
13 NM South of Looe Key...off Big Pine Key.
17 NM Southeast of Sombrero Key Light...off Marathon.
17 NM Southeast of Alligator Reef Light...off Islamorada.
13 NM Southeast of Molasses Reef Light...off Key Largo.
5 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.
$$
GMZ032-035-301500- Bayside and Gulf side from Craig Key to west end of Seven Mile Bridge- Gulf of Mexico from west end of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms- 1053 PM EDT Fri Aug 29 2025 OVERNIGHT Variable winds near 5 knots, becoming southeast to south 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth, becoming smooth to a light chop. Winds and seas higher in and around scattered showers and thunderstorms. SATURDAY South to southwest winds 5 to 10 knots, becoming southwest to west. Seas 1 foot or less. Nearshore waters smooth to a light chop. Scattered showers and thunderstorms. SATURDAY NIGHT West to northwest winds 5 to 10 knots, becoming southwest to west. Seas 1 foot or less. Nearshore waters smooth to a light chop. Scattered showers and thunderstorms. SUNDAY Southwest to west winds 5 to 10 knots, becoming west to northwest near 10 knots. Seas building to around 1 foot. Nearshore waters smooth to a light chop, becoming a light chop. Scattered showers and thunderstorms. SUNDAY NIGHT Northwest winds near 10 knots, decreasing to 5 to 10 knots. Seas around 1 foot. Nearshore waters a light chop, becoming smooth to a light chop. Scattered showers and thunderstorms. MONDAY West to northwest winds increasing to near 10 knots. Seas around 1 foot. Nearshore waters becoming a light chop. Scattered showers and thunderstorms. MONDAY NIGHT West to northwest winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. Scattered showers and thunderstorms. TUESDAY West winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. Scattered showers and thunderstorms. TUESDAY NIGHT AND WEDNESDAY Southwest to west winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. Scattered showers and thunderstorms. WEDNESDAY NIGHT Southwest to west winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. Scattered showers and thunderstorms. $$
GMZ032-035-301500- Bayside and Gulf side from Craig Key to west end of Seven Mile Bridge- Gulf of Mexico from west end of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms- 1053 PM EDT Fri Aug 29 2025 OVERNIGHT Variable winds near 5 knots, becoming southeast to south 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth, becoming smooth to a light chop. Winds and seas higher in and around scattered showers and thunderstorms. SATURDAY South to southwest winds 5 to 10 knots, becoming southwest to west. Seas 1 foot or less. Nearshore waters smooth to a light chop. Scattered showers and thunderstorms. SATURDAY NIGHT West to northwest winds 5 to 10 knots, becoming southwest to west. Seas 1 foot or less. Nearshore waters smooth to a light chop. Scattered showers and thunderstorms. SUNDAY Southwest to west winds 5 to 10 knots, becoming west to northwest near 10 knots. Seas building to around 1 foot. Nearshore waters smooth to a light chop, becoming a light chop. Scattered showers and thunderstorms. SUNDAY NIGHT Northwest winds near 10 knots, decreasing to 5 to 10 knots. Seas around 1 foot. Nearshore waters a light chop, becoming smooth to a light chop. Scattered showers and thunderstorms. MONDAY West to northwest winds increasing to near 10 knots. Seas around 1 foot. Nearshore waters becoming a light chop. Scattered showers and thunderstorms. MONDAY NIGHT West to northwest winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. Scattered showers and thunderstorms. TUESDAY West winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. Scattered showers and thunderstorms. TUESDAY NIGHT AND WEDNESDAY Southwest to west winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. Scattered showers and thunderstorms. WEDNESDAY NIGHT Southwest to west winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. Scattered showers and thunderstorms. $$