Hazardous marine condition(s):
Dense Fog Advisory
GMZ005-010930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1037 PM EST Sat Feb 28 2026
.SYNOPSIS...
An Atlantic ridge across South Florida will pull further east
while a frontal boundary stalls across north central Florida. The
combination of these features will result in light breezes likely
becoming variable later today. Thereafter, a broad high pressure
system is forecast to migrate into the eastern United States, then
out into the Atlantic. This is expected to support freshening
breezes, especially across the Straits of Florida. A mix of
Cautions and Advisories is becoming increasingly likely for the
bulk of the work week.
The Approximate Shoreward Edge of the Gulf Stream as of February
26...
14 NM South of Dry Tortugas Light...on Loggerhead Key.
4 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
2 NM South of Sand Key Light...off Key West.
9 NM South of Looe Key...off Big Pine Key.
14 NM Southeast of Sombrero Key Light...off Marathon.
12 NM Southeast of Alligator Reef Light...off Islamorada.
5 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.
$$
GMZ033-034-010930- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 1037 PM EST Sat Feb 28 2026 DENSE FOG ADVISORY IN EFFECT OVERNIGHT Northeast winds near 5 knots. Seas 1 foot or less. Wave Detail: Northeast 1 foot at 2 seconds. Areas of dense fog. Isolated showers. SUNDAY Northeast winds 5 to 10 knots, increasing to near 10 knots. Seas building to 1 to 2 feet. Wave Detail: Northeast 1 foot at 3 seconds and west to northwest 1 foot at 5 seconds. Isolated showers. SUNDAY NIGHT Northeast winds increasing to 10 to 15 knots. Seas 1 to 2 feet. Wave Detail: Northeast to east 2 feet at 3 seconds. Isolated showers. MONDAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. MONDAY NIGHT Northeast to east winds 10 to 15 knots, increasing to near 15 knots. Seas 2 to 3 feet, building to 2 to 4 feet. TUESDAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers. TUESDAY NIGHT Northeast to east winds 10 to 15 knots, increasing to 15 to 20 knots. Seas building to 2 to 4 feet, occasionally to 5 feet. Isolated showers. WEDNESDAY East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. WEDNESDAY NIGHT East winds near 15 knots. Seas 2 to 4 feet. Isolated showers. THURSDAY East winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers. THURSDAY NIGHT East winds near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. $$
GMZ033-034-010930- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 1037 PM EST Sat Feb 28 2026 DENSE FOG ADVISORY IN EFFECT OVERNIGHT Northeast winds near 5 knots. Seas 1 foot or less. Wave Detail: Northeast 1 foot at 2 seconds. Areas of dense fog. Isolated showers. SUNDAY Northeast winds 5 to 10 knots, increasing to near 10 knots. Seas building to 1 to 2 feet. Wave Detail: Northeast 1 foot at 3 seconds and west to northwest 1 foot at 5 seconds. Isolated showers. SUNDAY NIGHT Northeast winds increasing to 10 to 15 knots. Seas 1 to 2 feet. Wave Detail: Northeast to east 2 feet at 3 seconds. Isolated showers. MONDAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. MONDAY NIGHT Northeast to east winds 10 to 15 knots, increasing to near 15 knots. Seas 2 to 3 feet, building to 2 to 4 feet. TUESDAY Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers. TUESDAY NIGHT Northeast to east winds 10 to 15 knots, increasing to 15 to 20 knots. Seas building to 2 to 4 feet, occasionally to 5 feet. Isolated showers. WEDNESDAY East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. WEDNESDAY NIGHT East winds near 15 knots. Seas 2 to 4 feet. Isolated showers. THURSDAY East winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers. THURSDAY NIGHT East winds near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers. $$