GMZ005-220330-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1028 AM EST Sat Feb 21 2026
.SYNOPSIS...The western periphery of a surface high pressure will
maintain light to gentle east to southeast breezes this
afternoon. Breezes slacken to mainly light breezes thereafter as
the pressure gradient weakens. A period of light and variable
breezes remains possible tonight into early Sunday due to a
nebulous pressure gradient across the region. A strong cold front
will sweep through the Keys coastal waters beginning Sunday
evening, with strong, potentially near gale, northwest to north
breezes anticipated in its wake. Winds will slowly slacken and
veer to the northeast, then eventually to the east to southeast
Tuesday through Wednesday.
The Approximate Shoreward Edge of the Gulf Stream as of February
17...
7 NM South of Dry Tortugas Light...on Loggerhead Key.
3 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
2 NM South of Sand Key Light...off Key West.
7 NM South of Looe Key...off Big Pine Key.
11 NM Southeast of Sombrero Key Light...off Marathon.
14 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.
$$
GMZ033-034-220330- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of America including Dry Tortugas and Rebecca Shoal Channel- 1028 AM EST Sat Feb 21 2026 THIS AFTERNOON East to southeast winds near 5 knots. Seas around 1 foot. Wave Detail: East to southeast 1 foot at 3 seconds. TONIGHT East to southeast winds near 5 knots, becoming variable. Seas 1 foot or less. Wave Detail: East to southeast 1 foot at 3 seconds. Patchy fog after midnight. SUNDAY Variable winds near 5 knots, becoming west to northwest and increasing to 15 to 20 knots in the afternoon. Seas 1 foot or less, building to 2 to 3 feet. Wave Detail: West 2 feet at 3 seconds. Patchy fog in the morning. Scattered showers in the afternoon. SUNDAY NIGHT Northwest to north winds near 20 knots, becoming north and increasing to near 30 knots. Seas 2 to 4 feet, occasionally to 5 feet, building to 8 to 11 feet, occasionally to 14 feet. Isolated showers in the evening. MONDAY North winds 25 to 30 knots, becoming northwest to north and decreasing to 20 to 25 knots in the afternoon. Seas 8 to 11 feet, occasionally to 14 feet, subsiding to 7 to 9 feet, occasionally to 11 feet. MONDAY NIGHT Northwest to north winds near 25 knots. Seas 6 to 9 feet, occasionally to 11 feet. TUESDAY North winds 20 to 25 knots, decreasing to 10 to 15 knots in the afternoon. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 3 to 5 feet, occasionally to 6 feet. TUESDAY NIGHT North to northeast winds 10 to 15 knots, becoming northeast to east and decreasing to near 10 knots. Seas 3 to 5 feet, occasionally to 5 feet, subsiding to 2 to 4 feet, occasionally to 5 feet. WEDNESDAY East to southeast winds near 10 knots. Seas 2 to 3 feet. WEDNESDAY NIGHT East to southeast winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. $$
GMZ033-034-220330- 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- 1028 AM EST Sat Feb 21 2026 THIS AFTERNOON East to southeast winds near 5 knots. Seas around 1 foot. Wave Detail: East to southeast 1 foot at 3 seconds. TONIGHT East to southeast winds near 5 knots, becoming variable. Seas 1 foot or less. Wave Detail: East to southeast 1 foot at 3 seconds. Patchy fog after midnight. SUNDAY Variable winds near 5 knots, becoming west to northwest and increasing to 15 to 20 knots in the afternoon. Seas 1 foot or less, building to 2 to 3 feet. Wave Detail: West 2 feet at 3 seconds. Patchy fog in the morning. Scattered showers in the afternoon. SUNDAY NIGHT Northwest to north winds near 20 knots, becoming north and increasing to near 30 knots. Seas 2 to 4 feet, occasionally to 5 feet, building to 8 to 11 feet, occasionally to 14 feet. Isolated showers in the evening. MONDAY North winds 25 to 30 knots, becoming northwest to north and decreasing to 20 to 25 knots in the afternoon. Seas 8 to 11 feet, occasionally to 14 feet, subsiding to 7 to 9 feet, occasionally to 11 feet. MONDAY NIGHT Northwest to north winds near 25 knots. Seas 6 to 9 feet, occasionally to 11 feet. TUESDAY North winds 20 to 25 knots, decreasing to 10 to 15 knots in the afternoon. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 3 to 5 feet, occasionally to 6 feet. TUESDAY NIGHT North to northeast winds 10 to 15 knots, becoming northeast to east and decreasing to near 10 knots. Seas 3 to 5 feet, occasionally to 5 feet, subsiding to 2 to 4 feet, occasionally to 5 feet. WEDNESDAY East to southeast winds near 10 knots. Seas 2 to 3 feet. WEDNESDAY NIGHT East to southeast winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. $$