GMZ005-190930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
423 PM EST Wed Feb 18 2026
.SYNOPSIS...High pressure centered offshore of Georgia and South
Carolina will continue to drift eastward across the Atlantic.
This will promote gentle to moderate east to southeast breezes
tonight. Thereafter, breezes will generally peak and lull through
the early part of the weekend while this high slowly settles east
of the Bahamas. Dry conditions will prevail through the week. A
potentially strong cold front may sweep through the Keys starting
Sunday evening with freshening northwest to north breezes.
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.
$$
GMZ032-035-190930- 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- 423 PM EST Wed Feb 18 2026 TONIGHT East to southeast winds near 10 knots, becoming southeast. Seas around 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light chop. THURSDAY AND THURSDAY NIGHT Southeast winds near 10 knots. Seas around 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light chop. FRIDAY Southeast winds near 10 knots, decreasing to 5 to 10 knots in the afternoon. Seas around 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light chop, becoming smooth to a light chop. FRIDAY NIGHT East to southeast winds near 10 knots. Seas around 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light chop. SATURDAY Southeast winds 5 to 10 knots, becoming variable and decreasing to near 5 knots in the afternoon. Seas around 1 foot, subsiding to 1 foot or less. Nearshore waters smooth to a light chop, becoming smooth. SATURDAY NIGHT Variable winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. SUNDAY Variable winds near 5 knots, becoming west and increasing to 10 to 15 knots. Seas 1 foot or less, except building to 1 to 2 feet west of the Marquesas Keys. Nearshore waters smooth, becoming a light to moderate chop. Isolated showers. SUNDAY NIGHT Northwest winds near 15 knots, becoming northwest to north and increasing to near 25 knots. Seas 2 to 3 feet, building to 4 to 6 feet, occasionally to 8 feet. West of the Marquesas Keys, seas 2 to 4 feet, occasionally to 5 feet, building to 6 to 8 feet, occasionally to 10 feet. Nearshore waters a moderate chop, becoming extremely rough. Isolated showers. MONDAY North winds 20 to 25 knots, decreasing to near 20 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 very rough, becoming rough. MONDAY NIGHT North winds near 20 knots. Seas 3 to 5 feet, occasionally to 6 feet, except 5 to 7 feet, occasionally to 9 feet west of the Marquesas Keys. Nearshore waters rough. $$
GMZ032-035-190930- 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- 423 PM EST Wed Feb 18 2026 TONIGHT East to southeast winds near 10 knots, becoming southeast. Seas around 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light chop. THURSDAY AND THURSDAY NIGHT Southeast winds near 10 knots. Seas around 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light chop. FRIDAY Southeast winds near 10 knots, decreasing to 5 to 10 knots in the afternoon. Seas around 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light chop, becoming smooth to a light chop. FRIDAY NIGHT East to southeast winds near 10 knots. Seas around 1 foot, except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a light chop. SATURDAY Southeast winds 5 to 10 knots, becoming variable and decreasing to near 5 knots in the afternoon. Seas around 1 foot, subsiding to 1 foot or less. Nearshore waters smooth to a light chop, becoming smooth. SATURDAY NIGHT Variable winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. SUNDAY Variable winds near 5 knots, becoming west and increasing to 10 to 15 knots. Seas 1 foot or less, except building to 1 to 2 feet west of the Marquesas Keys. Nearshore waters smooth, becoming a light to moderate chop. Isolated showers. SUNDAY NIGHT Northwest winds near 15 knots, becoming northwest to north and increasing to near 25 knots. Seas 2 to 3 feet, building to 4 to 6 feet, occasionally to 8 feet. West of the Marquesas Keys, seas 2 to 4 feet, occasionally to 5 feet, building to 6 to 8 feet, occasionally to 10 feet. Nearshore waters a moderate chop, becoming extremely rough. Isolated showers. MONDAY North winds 20 to 25 knots, decreasing to near 20 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 very rough, becoming rough. MONDAY NIGHT North winds near 20 knots. Seas 3 to 5 feet, occasionally to 6 feet, except 5 to 7 feet, occasionally to 9 feet west of the Marquesas Keys. Nearshore waters rough. $$