Hazardous marine condition(s):
Short Term Forecast
GMZ005-040845-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
440 PM EDT Fri Oct 3 2025
.SYNOPSIS...High pressure is slowly moving across the eastern
U.S., which will maintain a northeast wind across our waters.
This high will build into the western North Atlantic, leading to
freshening northeast to east breezes into Friday evening. Winds
will then briefly clock around towards the southeast for the
upcoming weekend and return from the east early next week. Another
period of moderate to fresh breezes is possible starting Monday
night. Expect an active weather pattern with winds and seas
expected to be higher in and around thunderstorms.
The Approximate Shoreward Edge of the Gulf Stream as of October
01...
42 NM South of Dry Tortugas Light...on Loggerhead Key.
33 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
33 NM South of Sand Key Light...off Key West.
35 NM South of Looe Key...off Big Pine Key.
16 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.
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.
$$
GMZ032-035-040845- Bayside and Gulfside from Craig Key to west end of Seven Mile Bridge- Gulf of America from west end of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms- 440 PM EDT Fri Oct 3 2025 SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE TONIGHT Northeast winds 15 to 20 knots, decreasing to 10 to 15 knots late. Seas 2 to 3 feet. Nearshore waters choppy, becoming a light to moderate chop. Scattered showers and isolated thunderstorms. SATURDAY Northeast to east winds near 10 knots, becoming south to southwest 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming smooth to a light chop. Scattered showers and isolated thunderstorms. SATURDAY NIGHT South winds increasing to near 10 knots. Seas 1 to 2 feet. Nearshore waters becoming a light chop. Scattered showers and isolated thunderstorms. SUNDAY South to southwest winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Scattered showers and isolated thunderstorms. SUNDAY NIGHT Southeast winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. Scattered showers and isolated thunderstorms. MONDAY East to southeast winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. Scattered showers and isolated thunderstorms. MONDAY NIGHT Northeast to east winds increasing to 10 to 15 knots. Seas building to 1 to 2 feet. Nearshore waters becoming a light to moderate chop. Scattered showers and isolated thunderstorms. TUESDAY Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. Scattered showers and isolated thunderstorms. TUESDAY NIGHT Northeast to east winds increasing to 15 to 20 knots. Seas building to 2 to 3 feet, except building to 3 to 4 feet west of the Marquesas Keys. Nearshore waters becoming choppy. Scattered showers and isolated thunderstorms. WEDNESDAY Northeast to east winds 15 to 20 knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of the Marquesas Keys. Nearshore waters choppy. Scattered showers and isolated thunderstorms. WEDNESDAY NIGHT Northeast to east winds 15 to 20 knots. Seas 2 to 3 feet. West of the Marquesas Keys, seas 2 to 3 feet, building to 4 feet, occasionally to 5 feet after midnight. Nearshore waters choppy. Scattered showers and isolated thunderstorms. $$
GMZ032-035-040845- Bayside and Gulfside from Craig Key to west end of Seven Mile Bridge- Gulf of America from west end of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms- 440 PM EDT Fri Oct 3 2025 SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE TONIGHT Northeast winds 15 to 20 knots, decreasing to 10 to 15 knots late. Seas 2 to 3 feet. Nearshore waters choppy, becoming a light to moderate chop. Scattered showers and isolated thunderstorms. SATURDAY Northeast to east winds near 10 knots, becoming south to southwest 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming smooth to a light chop. Scattered showers and isolated thunderstorms. SATURDAY NIGHT South winds increasing to near 10 knots. Seas 1 to 2 feet. Nearshore waters becoming a light chop. Scattered showers and isolated thunderstorms. SUNDAY South to southwest winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Scattered showers and isolated thunderstorms. SUNDAY NIGHT Southeast winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. Scattered showers and isolated thunderstorms. MONDAY East to southeast winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. Scattered showers and isolated thunderstorms. MONDAY NIGHT Northeast to east winds increasing to 10 to 15 knots. Seas building to 1 to 2 feet. Nearshore waters becoming a light to moderate chop. Scattered showers and isolated thunderstorms. TUESDAY Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. Scattered showers and isolated thunderstorms. TUESDAY NIGHT Northeast to east winds increasing to 15 to 20 knots. Seas building to 2 to 3 feet, except building to 3 to 4 feet west of the Marquesas Keys. Nearshore waters becoming choppy. Scattered showers and isolated thunderstorms. WEDNESDAY Northeast to east winds 15 to 20 knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of the Marquesas Keys. Nearshore waters choppy. Scattered showers and isolated thunderstorms. WEDNESDAY NIGHT Northeast to east winds 15 to 20 knots. Seas 2 to 3 feet. West of the Marquesas Keys, seas 2 to 3 feet, building to 4 feet, occasionally to 5 feet after midnight. Nearshore waters choppy. Scattered showers and isolated thunderstorms. $$