GMZ005-180930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
427 PM EST Tue Feb 17 2026
.SYNOPSIS...High pressure currently centered just offshore of
Georgia and South Carolina will continue to drift east across the
Atlantic. This will promote gentle to moderate east to southeast
breezes this evening through the overnight. Thereafter, breezes
will generally peak 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.
$$
GMZ032-035-180930- 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- 427 PM EST Tue Feb 17 2026 TONIGHT East winds near 10 knots early, becoming east to southeast 10 to 15 knots. Seas 1 to 2 feet, except building to 2 to 3 feet west of the Marquesas Keys. Nearshore waters a light chop, becoming a light to moderate chop. WEDNESDAY Southeast winds 10 to 15 knots, decreasing to near 10 knots in the afternoon. Seas 1 to 2 feet, subsiding to around 1 foot. West of the Marquesas Keys, seas 2 to 3 feet, subsiding to 1 to 2 feet. Nearshore waters a light to moderate chop, becoming a light chop. WEDNESDAY 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. THURSDAY Southeast winds near 10 knots, decreasing to 5 to 10 knots. Seas around 1 foot. Nearshore waters a light chop, becoming smooth to a light chop. THURSDAY NIGHT Southeast winds increasing to near 10 knots. Seas around 1 foot. Nearshore waters becoming a light chop. FRIDAY Southeast winds decreasing to 5 to 10 knots. Seas 1 foot or less. Nearshore waters becoming smooth to a light chop. FRIDAY NIGHT East to southeast winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. SATURDAY Southeast winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. SATURDAY NIGHT Southeast to south winds near 5 knots, becoming southwest. Seas 1 foot or less. Nearshore waters smooth. SUNDAY Southwest to west winds 5 to 10 knots, becoming west near 15 knots. Seas 1 foot or less, building to 1 to 2 feet, except building to 2 to 3 feet west of the Marquesas Keys. Nearshore waters smooth to a light chop, becoming a moderate chop. Isolated showers. SUNDAY NIGHT Northwest winds 15 to 20 knots, becoming northwest to north 20 to 25 knots. Seas building to 2 to 4 feet, occasionally to 5 feet, except building to 5 to 6 feet, occasionally to 8 feet west of the Marquesas Keys. Nearshore waters choppy, becoming very rough. Isolated showers. $$
GMZ032-035-180930- 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- 427 PM EST Tue Feb 17 2026 TONIGHT East winds near 10 knots early, becoming east to southeast 10 to 15 knots. Seas 1 to 2 feet, except building to 2 to 3 feet west of the Marquesas Keys. Nearshore waters a light chop, becoming a light to moderate chop. WEDNESDAY Southeast winds 10 to 15 knots, decreasing to near 10 knots in the afternoon. Seas 1 to 2 feet, subsiding to around 1 foot. West of the Marquesas Keys, seas 2 to 3 feet, subsiding to 1 to 2 feet. Nearshore waters a light to moderate chop, becoming a light chop. WEDNESDAY 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. THURSDAY Southeast winds near 10 knots, decreasing to 5 to 10 knots. Seas around 1 foot. Nearshore waters a light chop, becoming smooth to a light chop. THURSDAY NIGHT Southeast winds increasing to near 10 knots. Seas around 1 foot. Nearshore waters becoming a light chop. FRIDAY Southeast winds decreasing to 5 to 10 knots. Seas 1 foot or less. Nearshore waters becoming smooth to a light chop. FRIDAY NIGHT East to southeast winds near 10 knots. Seas around 1 foot. Nearshore waters a light chop. SATURDAY Southeast winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop. SATURDAY NIGHT Southeast to south winds near 5 knots, becoming southwest. Seas 1 foot or less. Nearshore waters smooth. SUNDAY Southwest to west winds 5 to 10 knots, becoming west near 15 knots. Seas 1 foot or less, building to 1 to 2 feet, except building to 2 to 3 feet west of the Marquesas Keys. Nearshore waters smooth to a light chop, becoming a moderate chop. Isolated showers. SUNDAY NIGHT Northwest winds 15 to 20 knots, becoming northwest to north 20 to 25 knots. Seas building to 2 to 4 feet, occasionally to 5 feet, except building to 5 to 6 feet, occasionally to 8 feet west of the Marquesas Keys. Nearshore waters choppy, becoming very rough. Isolated showers. $$