GMZ005-272130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
429 AM EST Sat Dec 27 2025
.SYNOPSIS...Weak high pressure will meander in the eastern Gulf
over the next few days, resulting in light to gentle breezes.
Mainland nocturnal land breezes may drive brief bouts of gentle to
moderate northerlies in the morning. A healthy cold front is
expected to move through the Keys towards the middle part of next
week. This will lead to freshening northerly breezes throughout
all the Florida Keys coastal waters.
The Approximate Shoreward Edge of the Gulf Stream as of December
27...
18 NM South of Dry Tortugas Light...on Loggerhead Key.
11 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
12 NM South of Sand Key Light...off Key West.
12 NM South of Looe Key...off Big Pine Key.
13 NM Southeast of Sombrero Key Light...off Marathon.
8 NM Southeast of Alligator Reef Light...off Islamorada.
2 NM Southeast of Molasses Reef Light...off Key Largo.
2 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.
$$
GMZ032-035-272130- Bayside and Gulfside from Craig Key to west end of Seven Mile Bridge- Gulf of America from west end of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms- 429 AM EST Sat Dec 27 2025 TODAY Northwest to north winds 10 to 15 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet, subsiding to 1 foot or less. Nearshore waters a light to moderate chop, becoming smooth to a light chop. TONIGHT North winds 5 to 10 knots, becoming north to northeast. Seas 1 foot or less. Nearshore waters smooth to a light chop. SUNDAY Northeast winds 5 to 10 knots, becoming east. Seas 1 foot or less. Nearshore waters smooth to a light chop. SUNDAY NIGHT East winds near 5 knots, becoming northeast to east. Seas less than 1 foot. Nearshore waters smooth. MONDAY Northeast winds near 5 knots, becoming variable. Seas less than 1 foot. Nearshore waters smooth. MONDAY NIGHT Northwest to north near 5 knots, increasing to 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth, becoming smooth to a light chop. TUESDAY Northwest to north winds near 10 knots, increasing to near 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet. West of the Marquesas Keys, seas 2 to 3 feet, building to 3 to 5 feet, occasionally to 6 feet. Nearshore waters a light chop, becoming a moderate chop. Isolated showers. TUESDAY NIGHT North winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet, except 5 to 6 feet, occasionally to 8 feet west of the Marquesas Keys. Nearshore waters choppy. WEDNESDAY North winds 15 to 20 knots, decreasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 2 to 3 feet. West of the Marquesas Keys, seas 5 to 6 feet, occasionally to 8 feet, subsiding to 3 to 4 feet, occasionally to 5 feet. Nearshore waters choppy, becoming a light to moderate chop. WEDNESDAY NIGHT North winds 10 to 15 knots. Seas 1 to 2 feet, except around 3 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop. $$
GMZ032-035-272130- 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- 429 AM EST Sat Dec 27 2025 TODAY Northwest to north winds 10 to 15 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet, subsiding to 1 foot or less. Nearshore waters a light to moderate chop, becoming smooth to a light chop. TONIGHT North winds 5 to 10 knots, becoming north to northeast. Seas 1 foot or less. Nearshore waters smooth to a light chop. SUNDAY Northeast winds 5 to 10 knots, becoming east. Seas 1 foot or less. Nearshore waters smooth to a light chop. SUNDAY NIGHT East winds near 5 knots, becoming northeast to east. Seas less than 1 foot. Nearshore waters smooth. MONDAY Northeast winds near 5 knots, becoming variable. Seas less than 1 foot. Nearshore waters smooth. MONDAY NIGHT Northwest to north near 5 knots, increasing to 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth, becoming smooth to a light chop. TUESDAY Northwest to north winds near 10 knots, increasing to near 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet. West of the Marquesas Keys, seas 2 to 3 feet, building to 3 to 5 feet, occasionally to 6 feet. Nearshore waters a light chop, becoming a moderate chop. Isolated showers. TUESDAY NIGHT North winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet, except 5 to 6 feet, occasionally to 8 feet west of the Marquesas Keys. Nearshore waters choppy. WEDNESDAY North winds 15 to 20 knots, decreasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 2 to 3 feet. West of the Marquesas Keys, seas 5 to 6 feet, occasionally to 8 feet, subsiding to 3 to 4 feet, occasionally to 5 feet. Nearshore waters choppy, becoming a light to moderate chop. WEDNESDAY NIGHT North winds 10 to 15 knots. Seas 1 to 2 feet, except around 3 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop. $$