GMZ005-042030-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
417 AM EDT Sat Oct 4 2025
.SYNOPSIS...A weak area of low pressure located near the central
and northwestern Bahamas will act to weaken the pressure gradient
briefly across the Florida Keys this weekend. This will result in
slackening breezes veering from the northeast to the southeast
today through Sunday. This system is expected to drift west-
northwestward across the northwestern Bahamas and toward southern
Florida during the next couple of days. As it lifts north and
northwest of the Keys, high pressure across the Atlantic will
build back in resulting in freshening northeast to east breezes.
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.
$$
GMZ042>044-042030- Hawk Channel from Ocean Reef to Craig Key out to the reef- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 417 AM EDT Sat Oct 4 2025 TODAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. Winds and seas higher in and around numerous showers and isolated thunderstorms. TONIGHT Northeast to east winds 10 to 15 knots, becoming east to southeast 5 to 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Nearshore waters a light to moderate chop, becoming smooth to a light chop. Winds and seas higher in and around scattered showers and isolated thunderstorms. SUNDAY Southeast winds 5 to 10 knots, briefly decreasing to near 5 knots in the afternoon. Seas 1 to 2 feet. Nearshore waters smooth to a light chop, becoming smooth. Winds and seas higher in and around scattered showers and isolated thunderstorms. SUNDAY NIGHT East to southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Scattered showers and isolated thunderstorms. MONDAY Northeast to east winds 5 to 10 knots, increasing to 10 to 15 knots. Seas building to 1 to 2 feet. Nearshore waters smooth to a light chop, becoming a light to moderate chop. Scattered showers and isolated thunderstorms. MONDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. Scattered showers and isolated thunderstorms. TUESDAY Northeast to east winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas building to 2 to 3 feet. Nearshore waters a light to moderate chop, becoming choppy. Scattered showers and isolated thunderstorms. TUESDAY NIGHT THROUGH WEDNESDAY NIGHT Northeast to east winds 15 to 20 knots. Seas 2 to 4 feet. Nearshore waters choppy. Scattered showers and isolated thunderstorms. $$
GMZ042>044-042030- Hawk Channel from Ocean Reef to Craig Key out to the reef- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 417 AM EDT Sat Oct 4 2025 TODAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. Winds and seas higher in and around numerous showers and isolated thunderstorms. TONIGHT Northeast to east winds 10 to 15 knots, becoming east to southeast 5 to 10 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet. Nearshore waters a light to moderate chop, becoming smooth to a light chop. Winds and seas higher in and around scattered showers and isolated thunderstorms. SUNDAY Southeast winds 5 to 10 knots, briefly decreasing to near 5 knots in the afternoon. Seas 1 to 2 feet. Nearshore waters smooth to a light chop, becoming smooth. Winds and seas higher in and around scattered showers and isolated thunderstorms. SUNDAY NIGHT East to southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Scattered showers and isolated thunderstorms. MONDAY Northeast to east winds 5 to 10 knots, increasing to 10 to 15 knots. Seas building to 1 to 2 feet. Nearshore waters smooth to a light chop, becoming a light to moderate chop. Scattered showers and isolated thunderstorms. MONDAY NIGHT 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 Northeast to east winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas building to 2 to 3 feet. Nearshore waters a light to moderate chop, becoming choppy. Scattered showers and isolated thunderstorms. TUESDAY NIGHT THROUGH WEDNESDAY NIGHT Northeast to east winds 15 to 20 knots. Seas 2 to 4 feet. Nearshore waters choppy. Scattered showers and isolated thunderstorms. $$