GMZ005-300345-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1031 AM EST Mon Dec 29 2025
.SYNOPSIS...High pressure will meander in the eastern Gulf today
into tonight, resulting in light breezes. A cold front is
expected to push southeastwards across Keys waters Tuesday and
Tuesday night. This will lead to freshening northerly breezes
throughout all the Florida Keys coastal waters, with our
easternmost waters likely holding off until late Tuesday. Small
Craft Advisories are becoming increasingly likely for portions of
Keys waters on Tuesday into Tuesday night.
The Approximate Shoreward Edge of the Gulf Stream as of December
27...
18 NM South of Dry Tortugas Light...on Loggerhead Key.
11 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
12 NM South of Sand Key Light...off Key West.
12 NM South of Looe Key...off Big Pine Key.
13 NM Southeast of Sombrero Key Light...off Marathon.
8 NM Southeast of Alligator Reef Light...off Islamorada.
2 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 based on products from NASA SPoRT and RTOFS.
$$
GMZ043-044-300345- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 1031 AM EST Mon Dec 29 2025 THIS AFTERNOON Northeast winds near 5 knots, becoming northwest to north late. Seas around 1 foot. Nearshore waters smooth. TONIGHT Northwest winds 5 to 10 knots, increasing to near 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop, becoming a light chop. Isolated showers. TUESDAY Northwest to north winds increasing to near 20 knots early. Seas building to 1 to 3 feet, except building to 3 to 5 feet, occasionally to 6 feet west of Cosgrove Shoal Light. Nearshore waters becoming rough. Isolated showers. TUESDAY NIGHT North winds near 20 knots. Seas 2 to 3 feet, except 4 to 6 feet, occasionally to 8 feet west of Cosgrove Shoal Light. Nearshore waters rough. WEDNESDAY North winds 15 to 20 knots, decreasing to 10 to 15 knots in the afternoon. Seas 2 to 3 feet, except 3 to 5 feet, occasionally to 6 feet west of Cosgrove Shoal Light. Nearshore waters choppy, becoming a light to moderate chop. WEDNESDAY NIGHT North winds 10 to 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters a light to moderate chop. THURSDAY North winds 10 to 15 knots, decreasing to near 10 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop, becoming a light chop. THURSDAY NIGHT North winds 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop. FRIDAY Northeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. FRIDAY NIGHT East winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. $$
GMZ043-044-300345- 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- 1031 AM EST Mon Dec 29 2025 THIS AFTERNOON Northeast winds near 5 knots, becoming northwest to north late. Seas around 1 foot. Nearshore waters smooth. TONIGHT Northwest winds 5 to 10 knots, increasing to near 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop, becoming a light chop. Isolated showers. TUESDAY Northwest to north winds increasing to near 20 knots early. Seas building to 1 to 3 feet, except building to 3 to 5 feet, occasionally to 6 feet west of Cosgrove Shoal Light. Nearshore waters becoming rough. Isolated showers. TUESDAY NIGHT North winds near 20 knots. Seas 2 to 3 feet, except 4 to 6 feet, occasionally to 8 feet west of Cosgrove Shoal Light. Nearshore waters rough. WEDNESDAY North winds 15 to 20 knots, decreasing to 10 to 15 knots in the afternoon. Seas 2 to 3 feet, except 3 to 5 feet, occasionally to 6 feet west of Cosgrove Shoal Light. Nearshore waters choppy, becoming a light to moderate chop. WEDNESDAY NIGHT North winds 10 to 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of Cosgrove Shoal Light. Nearshore waters a light to moderate chop. THURSDAY North winds 10 to 15 knots, decreasing to near 10 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop, becoming a light chop. THURSDAY NIGHT North winds 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop. FRIDAY Northeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. FRIDAY NIGHT East winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. $$