GMZ005-210300-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
915 AM EST Thu Nov 20 2025
.SYNOPSIS...A high pressure system stretching from the western
Atlantic to the Florida panhandle will consolidate along the
Atlantic Coast over the next couple of days, leading to a brief
strengthening of northeast to easterly breezes tonight. This high
will lengthen out into the Atlantic through the remainder of the
week and result in slight slackening to light to gentle by the
weekend. Expect slightly fresher breezes south of the island
chain. Breezes will gradually freshen early next week as the ridge
is reinforced by a continental advancing into the eastern United
States.
The Approximate Shoreward Edge of the Gulf Stream as of November 14...
54 NM South of Dry Tortugas Light...on Loggerhead Key.
23 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
19 NM South of Sand Key Light...off Key West.
17 NM South of Looe Key...off Big Pine Key.
15 NM Southeast of Sombrero Key Light...off Marathon.
4 NM Southeast of Alligator Reef Light...off Islamorada.
1 NM Southeast of Molasses Reef Light...off Key Largo.
1 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.
$$
GMZ042>044-210300- Hawk Channel from Ocean Reef to Craig Key out to the reef- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 915 AM EST Thu Nov 20 2025 THIS AFTERNOON Northeast to east winds 10 to 15 knots, increasing to near 15 knots late. Seas 1 to 2 feet. Nearshore waters a light to moderate chop, becoming a moderate chop. TONIGHT Northeast to east winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop, becoming a light to moderate chop. FRIDAY East winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. FRIDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters a light to moderate chop. SATURDAY Northeast to east winds decreasing to near 10 knots. Seas 1 to 2 feet. Nearshore waters becoming a light chop. SATURDAY NIGHT Northeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. SUNDAY Northeast winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. SUNDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. MONDAY AND MONDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. $$
GMZ042>044-210300- 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- 915 AM EST Thu Nov 20 2025 THIS AFTERNOON Northeast to east winds 10 to 15 knots, increasing to near 15 knots late. Seas 1 to 2 feet. Nearshore waters a light to moderate chop, becoming a moderate chop. TONIGHT Northeast to east winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop, becoming a light to moderate chop. FRIDAY East winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a light to moderate chop. FRIDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters a light to moderate chop. SATURDAY Northeast to east winds decreasing to near 10 knots. Seas 1 to 2 feet. Nearshore waters becoming a light chop. SATURDAY NIGHT Northeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. SUNDAY Northeast winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. SUNDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. MONDAY AND MONDAY NIGHT Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. $$