GMZ005-292130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
423 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.
$$
GMZ031-292130- Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound- 423 AM EST Mon Dec 29 2025 TODAY Northwest to north winds near 5 knots, becoming west 5 to 10 knots this afternoon. Bay waters smooth, becoming smooth to a light chop. TONIGHT Northwest winds near 10 knots. Bay waters a light chop. TUESDAY Northwest to north winds near 15 knots. Bay waters a moderate chop. Isolated showers. TUESDAY NIGHT North winds 15 to 20 knots, increasing to near 20 knots. Bay waters choppy, becoming rough. WEDNESDAY Northwest to north winds 15 to 20 knots, decreasing to 10 to 15 knots. Bay waters choppy, becoming a light to moderate chop. WEDNESDAY NIGHT Northwest to north winds near 10 knots, increasing to near 15 knots. Bay waters a light chop, becoming a moderate chop. THURSDAY Northwest to north winds near 15 knots, decreasing to 5 to 10 knots. Bay waters a moderate chop, becoming smooth to a light chop. THURSDAY NIGHT North winds 5 to 10 knots. Bay waters smooth to a light chop. FRIDAY Northeast winds 5 to 10 knots. Bay waters smooth to a light chop. FRIDAY NIGHT Variable winds near 5 knots. Bay waters smooth. $$
GMZ031-292130- Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound- 423 AM EST Mon Dec 29 2025 TODAY Northwest to north winds near 5 knots, becoming west 5 to 10 knots this afternoon. Bay waters smooth, becoming smooth to a light chop. TONIGHT Northwest winds near 10 knots. Bay waters a light chop. TUESDAY Northwest to north winds near 15 knots. Bay waters a moderate chop. Isolated showers. TUESDAY NIGHT North winds 15 to 20 knots, increasing to near 20 knots. Bay waters choppy, becoming rough. WEDNESDAY Northwest to north winds 15 to 20 knots, decreasing to 10 to 15 knots. Bay waters choppy, becoming a light to moderate chop. WEDNESDAY NIGHT Northwest to north winds near 10 knots, increasing to near 15 knots. Bay waters a light chop, becoming a moderate chop. THURSDAY Northwest to north winds near 15 knots, decreasing to 5 to 10 knots. Bay waters a moderate chop, becoming smooth to a light chop. THURSDAY NIGHT North winds 5 to 10 knots. Bay waters smooth to a light chop. FRIDAY Northeast winds 5 to 10 knots. Bay waters smooth to a light chop. FRIDAY NIGHT Variable winds near 5 knots. Bay waters smooth. $$