Hazardous marine condition(s):
Short Term Forecast
Small Craft Advisory
GMZ005-160930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
426 PM EST Mon Dec 15 2025
.SYNOPSIS...The pressure gradient will remain tightened in the
wake of the recent cold front passage and will maintain an
extended period of fresh to strong breezes. Higher pressure
building in during the middle of the week will cause breezes to
slacken for the second half of the week. A weaker front looks to
move through by the end of the week with potentially freshening
breezes for the weekend.
The Approximate Shoreward Edge of the Gulf Stream as of December 15...
26 NM South of Dry Tortugas Light...on Loggerhead Key.
21 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
15 NM South of Sand Key Light...off Key West.
18 NM South of Looe Key...off Big Pine Key.
16 NM Southeast of Sombrero Key Light...off Marathon.
13 NM Southeast of Alligator Reef Light...off Islamorada.
7 NM Southeast of Molasses Reef Light...off Key Largo.
3 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.
$$
GMZ052>055-072>075-160930- Straits of Florida from Ocean Reef to Craig Key out 20 NM- Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 NM- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM- Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out- Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas 20 to 60 NM out- 426 PM EST Mon Dec 15 2025 SMALL CRAFT ADVISORY IN EFFECT TONIGHT Northeast winds 20 to 25 knots, increasing to near 25 knots. Seas 7 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast to east 9 feet at 7 seconds and northwest to north 3 feet at 8 seconds. Numerous showers. TUESDAY Northeast to east winds 20 to 25 knots. Seas 6 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast to east 8 feet at 8 seconds and northwest 2 feet at 7 seconds. Scattered showers. TUESDAY NIGHT Northeast to east winds 20 to 25 knots, decreasing to near 20 knots late. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast to east 8 feet at 7 seconds. Isolated showers. WEDNESDAY East winds near 20 knots early, decreasing to15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 4 to 6 feet, occasionally to 8 feet. Isolated showers. WEDNESDAY NIGHT East winds near 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Isolated showers. THURSDAY East to southeast winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Isolated showers. THURSDAY NIGHT East to southeast winds 10 to 15 knots, becoming southeast to south near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Isolated showers. FRIDAY Southwest to west winds near 10 knots, becoming northwest to north in the afternoon. Seas around 2 feet. Isolated showers. FRIDAY NIGHT North to northeast winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers. SATURDAY Northeast to east winds 10 to 15 knots, increasing to near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. SATURDAY NIGHT East winds near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Isolated showers. $$
GMZ052>055-072>075-160930- Straits of Florida from Ocean Reef to Craig Key out 20 NM- Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 NM- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM- Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out- Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas 20 to 60 NM out- 426 PM EST Mon Dec 15 2025 SMALL CRAFT ADVISORY IN EFFECT TONIGHT Northeast winds 20 to 25 knots, increasing to near 25 knots. Seas 7 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast to east 9 feet at 7 seconds and northwest to north 3 feet at 8 seconds. Numerous showers. TUESDAY Northeast to east winds 20 to 25 knots. Seas 6 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast to east 8 feet at 8 seconds and northwest 2 feet at 7 seconds. Scattered showers. TUESDAY NIGHT Northeast to east winds 20 to 25 knots, decreasing to near 20 knots late. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast to east 8 feet at 7 seconds. Isolated showers. WEDNESDAY East winds near 20 knots early, decreasing to15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 4 to 6 feet, occasionally to 8 feet. Isolated showers. WEDNESDAY NIGHT East winds near 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Isolated showers. THURSDAY East to southeast winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Isolated showers. THURSDAY NIGHT East to southeast winds 10 to 15 knots, becoming southeast to south near 10 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Isolated showers. FRIDAY Southwest to west winds near 10 knots, becoming northwest to north in the afternoon. Seas around 2 feet. Isolated showers. FRIDAY NIGHT North to northeast winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers. SATURDAY Northeast to east winds 10 to 15 knots, increasing to near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. SATURDAY NIGHT East winds near 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Isolated showers. $$