Hazardous marine condition(s):
Small Craft Advisory
GMZ005-221430-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1025 PM EDT Tue Apr 21 2026
.SYNOPSIS...Fresh to strong northeast to east breezes will
continue through Wednesday as high pressure builds across the
Eastern Seaboard in the wake of last evenings front. This high
will continue to slowly migrate into the western North Atlantic
over the next several days. As the high slowly weakens, breezes
will begin to slacken by Thursday. Gentle to moderate breezes are
expected for Friday and Saturday.
The Approximate Shoreward Edge of the Gulf Stream as of April 16...
16 NM South of Dry Tortugas Light...on Loggerhead Key.
12 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
22 NM South of Sand Key Light...off Key West.
30 NM South of Looe Key...off Big Pine Key.
26 NM Southeast of Sombrero Key Light...off Marathon.
20 NM Southeast of Alligator Reef Light...off Islamorada.
15 NM Southeast of Molasses Reef Light...off Key Largo.
9 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.
$$
GMZ042>044-221430- 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- 1025 PM EDT Tue Apr 21 2026 SMALL CRAFT ADVISORY IN EFFECT OVERNIGHT Northeast to east winds near 25 knots, decreasing to 20 to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. Nearshore waters extremely rough, becoming very rough. WEDNESDAY East winds 20 to 25 knots, decreasing to near 20 knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3 to 5 feet, occasionally to 7 feet. Nearshore waters very rough, becoming rough. A slight chance of showers. WEDNESDAY NIGHT East winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Nearshore waters choppy. A slight chance of showers. THURSDAY East winds near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Nearshore waters a moderate chop. A chance of showers. THURSDAY NIGHT East to southeast winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Nearshore waters a moderate chop, becoming a light to moderate chop. A chance of showers with a slight chance of thunderstorms. FRIDAY East to southeast winds 10 to 15 knots. Seas around 2 feet. Nearshore waters a light to moderate chop. A chance of showers with a slight chance of thunderstorms. FRIDAY NIGHT East to southeast winds 10 to 15 knots. Seas around 2 feet. Nearshore waters a light to moderate chop. A slight chance of showers. SATURDAY East to southeast winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming smooth to a light chop. SATURDAY NIGHT East winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. SUNDAY Southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. SUNDAY NIGHT East to southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. $$
GMZ042>044-221430- 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- 1025 PM EDT Tue Apr 21 2026 SMALL CRAFT ADVISORY IN EFFECT OVERNIGHT Northeast to east winds near 25 knots, decreasing to 20 to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. Nearshore waters extremely rough, becoming very rough. WEDNESDAY East winds 20 to 25 knots, decreasing to near 20 knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3 to 5 feet, occasionally to 7 feet. Nearshore waters very rough, becoming rough. A slight chance of showers. WEDNESDAY NIGHT East winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Nearshore waters choppy. A slight chance of showers. THURSDAY East winds near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Nearshore waters a moderate chop. A chance of showers. THURSDAY NIGHT East to southeast winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. Nearshore waters a moderate chop, becoming a light to moderate chop. A chance of showers with a slight chance of thunderstorms. FRIDAY East to southeast winds 10 to 15 knots. Seas around 2 feet. Nearshore waters a light to moderate chop. A chance of showers with a slight chance of thunderstorms. FRIDAY NIGHT East to southeast winds 10 to 15 knots. Seas around 2 feet. Nearshore waters a light to moderate chop. A slight chance of showers. SATURDAY East to southeast winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming smooth to a light chop. SATURDAY NIGHT East winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. SUNDAY Southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. SUNDAY NIGHT East to southeast winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. $$