GMZ005-221545-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1033 PM EST Sat Feb 21 2026
.SYNOPSIS...Light and variable breezes will continue overnight
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
shift to the east to southeast Tuesday through Thursday.
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.
$$
GMZ032-035-221545- Bayside and Gulfside from Craig Key to west end of Seven Mile Bridge- Gulf of America from west end of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms- 1033 PM EST Sat Feb 21 2026 OVERNIGHT Variable winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. Patchy fog developing. SUNDAY Variable winds near 5 knots, becoming west to northwest and increasing to near 15 knots. Seas 1 foot or less, building to around 1 foot. Nearshore waters smooth. Isolated showers in the afternoon. Patchy fog early. SUNDAY NIGHT Northwest to north winds 15 to 20 knots, increasing to 25 to 30 knots. Seas 1 to 2 feet, building to 4 to 6 feet, occasionally to 8 feet. West of the Marquesas Keys, seas 2 to 3 feet, building to 7 to 10 feet, occasionally to 13 feet. Nearshore waters choppy, becoming extremely rough. 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 4 to 6 feet, occasionally to 8 feet. West of the Marquesas Keys, seas 9 to 11 feet, occasionally to 14 feet, subsiding to 7 to 9 feet, occasionally to 11 feet. Nearshore waters extremely rough, becoming very rough. MONDAY NIGHT Northwest to north winds near 25 knots, decreasing to 20 to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet, except 6 to 9 feet, occasionally to 11 feet west of the Marquesas Keys. Nearshore waters extremely rough, becoming very rough. TUESDAY North winds 20 to 25 knots, becoming north to northeast and decreasing to 10 to 15 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 2 to 3 feet. West of the Marquesas Keys, seas 5 to 7 feet, occasionally to 9 feet, subsiding to 3 to 5 feet, occasionally to 7 feet. Nearshore waters very rough, becoming a light to moderate chop. TUESDAY NIGHT North winds 10 to 15 knots, becoming northeast to east and decreasing to near 10 knots. Seas 1 to 3 feet, subsiding to 1 to 2 feet. West of the Marquesas Keys, seas 3 to 4 feet, occasionally to 5 feet, subsiding to around 3 feet. Nearshore waters a light to moderate chop, becoming a light chop. WEDNESDAY East winds 10 to 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop. WEDNESDAY NIGHT East to southeast winds near 15 knots. Seas 1 to 2 feet, except building to 2 to 4 feet, occasionally to 5 feet west of the Marquesas Keys. Nearshore waters a moderate chop. THURSDAY AND THURSDAY NIGHT Southeast winds 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters a light to moderate chop. Isolated showers. $$
GMZ032-035-221545- Bayside and Gulfside from Craig Key to west end of Seven Mile Bridge- Gulf of America from west end of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms- 1033 PM EST Sat Feb 21 2026 OVERNIGHT Variable winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. Patchy fog developing. SUNDAY Variable winds near 5 knots, becoming west to northwest and increasing to near 15 knots. Seas 1 foot or less, building to around 1 foot. Nearshore waters smooth. Isolated showers in the afternoon. Patchy fog early. SUNDAY NIGHT Northwest to north winds 15 to 20 knots, increasing to 25 to 30 knots. Seas 1 to 2 feet, building to 4 to 6 feet, occasionally to 8 feet. West of the Marquesas Keys, seas 2 to 3 feet, building to 7 to 10 feet, occasionally to 13 feet. Nearshore waters choppy, becoming extremely rough. 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 4 to 6 feet, occasionally to 8 feet. West of the Marquesas Keys, seas 9 to 11 feet, occasionally to 14 feet, subsiding to 7 to 9 feet, occasionally to 11 feet. Nearshore waters extremely rough, becoming very rough. MONDAY NIGHT Northwest to north winds near 25 knots, decreasing to 20 to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet, except 6 to 9 feet, occasionally to 11 feet west of the Marquesas Keys. Nearshore waters extremely rough, becoming very rough. TUESDAY North winds 20 to 25 knots, becoming north to northeast and decreasing to 10 to 15 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 2 to 3 feet. West of the Marquesas Keys, seas 5 to 7 feet, occasionally to 9 feet, subsiding to 3 to 5 feet, occasionally to 7 feet. Nearshore waters very rough, becoming a light to moderate chop. TUESDAY NIGHT North winds 10 to 15 knots, becoming northeast to east and decreasing to near 10 knots. Seas 1 to 3 feet, subsiding to 1 to 2 feet. West of the Marquesas Keys, seas 3 to 4 feet, occasionally to 5 feet, subsiding to around 3 feet. Nearshore waters a light to moderate chop, becoming a light chop. WEDNESDAY East winds 10 to 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop. WEDNESDAY NIGHT East to southeast winds near 15 knots. Seas 1 to 2 feet, except building to 2 to 4 feet, occasionally to 5 feet west of the Marquesas Keys. Nearshore waters a moderate chop. THURSDAY AND THURSDAY NIGHT Southeast winds 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters a light to moderate chop. Isolated showers. $$