Hazardous marine condition(s):
Small Craft Advisory
GMZ005-291530-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1025 PM EST Fri Nov 28 2025
.SYNOPSIS...A frontal boundary south of the area, paired with a
dominant surface high over the eastern CONUS, will maintain fresh
to strong northeasterly breezes through Saturday, and Small Craft
Advisories will likely extend through Saturday night. As the front
decays and the high shifts northeastward, breezes will begin to
slacken by early Sunday. Another cold front may be on the horizon
for the middle of the week, reflected in the breezes turning
around the clock ahead of it. Shower activity will wax and wane
throughout the marine forecast period.
The Approximate Shoreward Edge of the Gulf Stream as of November
28...
28 NM South of Dry Tortugas Light...on Loggerhead Key.
20 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
17 NM South of Sand Key Light...off Key West.
15 NM South of Looe Key...off Big Pine Key.
15 NM Southeast of Sombrero Key Light...off Marathon.
10 NM Southeast of Alligator Reef Light...off Islamorada.
9 NM Southeast of Molasses Reef Light...off Key Largo.
8 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>044-291530- 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 EST Fri Nov 28 2025 SMALL CRAFT ADVISORY IN EFFECT OVERNIGHT Northeast winds 20 to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet, except 5 to 7 feet, occasionally to 9 feet west of Cosgrove Shoal Light. Nearshore waters very rough. SATURDAY Northeast to east winds 20 to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet, except 5 to 6 feet, occasionally to 8 feet west of Cosgrove Shoal Light. Nearshore waters very rough. Scattered showers. SATURDAY NIGHT Northeast to east winds near 25 knots, becoming east and decreasing to 20 to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. Nearshore waters extremely rough, becoming very rough. Scattered showers. SUNDAY East winds near 20 knots, decreasing to 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Nearshore waters rough, becoming choppy. Scattered showers. SUNDAY NIGHT Northeast to east winds decreasing to 10 to 15 knots. Seas subsiding to 2 to 3 feet. Nearshore waters becoming a light to moderate chop. Isolated showers. MONDAY East winds 10 to 15 knots. Seas around 2 feet. Nearshore waters a light to moderate chop. Isolated showers. MONDAY NIGHT East to southeast winds 10 to 15 knots, becoming southeast. Seas around 2 feet. Nearshore waters a light to moderate chop. Isolated showers. TUESDAY South winds 10 to 15 knots, becoming southwest to west. Seas 1 to 2 feet. Nearshore waters a light to moderate chop, becoming a light chop. Isolated showers. TUESDAY NIGHT Northwest winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. Isolated showers. WEDNESDAY North to northeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Isolated showers. WEDNESDAY NIGHT North to northeast winds 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop. $$
GMZ042>044-291530- 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 EST Fri Nov 28 2025 SMALL CRAFT ADVISORY IN EFFECT OVERNIGHT Northeast winds 20 to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet, except 5 to 7 feet, occasionally to 9 feet west of Cosgrove Shoal Light. Nearshore waters very rough. SATURDAY Northeast to east winds 20 to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet, except 5 to 6 feet, occasionally to 8 feet west of Cosgrove Shoal Light. Nearshore waters very rough. Scattered showers. SATURDAY NIGHT Northeast to east winds near 25 knots, becoming east and decreasing to 20 to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. Nearshore waters extremely rough, becoming very rough. Scattered showers. SUNDAY East winds near 20 knots, decreasing to 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Nearshore waters rough, becoming choppy. Scattered showers. SUNDAY NIGHT Northeast to east winds decreasing to 10 to 15 knots. Seas subsiding to 2 to 3 feet. Nearshore waters becoming a light to moderate chop. Isolated showers. MONDAY East winds 10 to 15 knots. Seas around 2 feet. Nearshore waters a light to moderate chop. Isolated showers. MONDAY NIGHT East to southeast winds 10 to 15 knots, becoming southeast. Seas around 2 feet. Nearshore waters a light to moderate chop. Isolated showers. TUESDAY South winds 10 to 15 knots, becoming southwest to west. Seas 1 to 2 feet. Nearshore waters a light to moderate chop, becoming a light chop. Isolated showers. TUESDAY NIGHT Northwest winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. Isolated showers. WEDNESDAY North to northeast winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Isolated showers. WEDNESDAY NIGHT North to northeast winds 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop. $$