Gulf of Mexico from Seven Mile Bridge to Halfmoon Shoal Marine Forecast
| Overnight...Northwest To North Winds 20 To 25 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 Very Rough. Isolated Showers. |
| Monday...North Winds 20 To 25 Knots, Becoming North To Northeast Near 15 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet, Subsiding To 2 To 4 Feet, Occasionally To 5 Feet. West Of The Marquesas Keys, Seas 5 To 7 Feet, Occasionally To 9 Feet, Subsiding To 4 To 6 Feet, Occasionally To 8 Feet. Nearshore Waters Very Rough, Becoming A Moderate Chop. |
| Monday Night...North To Northeast Winds Near 15 Knots, Increasing To 20 To 25 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Nearshore Waters A Moderate Chop, Becoming Very Rough. |
| Tuesday...North To Northeast Winds 20 To 25 Knots, Becoming Northeast 15 To 20 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Nearshore Waters Very Rough, Becoming Choppy. |
| Tuesday Night...Northeast Winds Near 20 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Nearshore Waters Rough. |
| Wednesday...Northeast Winds Near 20 Knots. Seas 2 To 3 Feet. Nearshore Waters Rough. Isolated Showers. |
| Wednesday Night...Northeast To East Winds 15 To 20 Knots, Decreasing To Near 15 Knots. Seas 2 To 3 Feet, Subsiding To Around 2 Feet. Nearshore Waters Choppy, Becoming A Moderate Chop. Isolated Showers. |
| Thursday...Northeast Winds 10 To 15 Knots. Seas 1 To 2 Feet. Nearshore Waters A Light To Moderate Chop. Scattered Showers. |
| Thursday Night...North To Northeast Winds Near 15 Knots. Seas Around 2 Feet. Nearshore Waters A Moderate Chop. Isolated Showers. |
| Friday...Northeast Winds 10 To 15 Knots. Seas 1 To 2 Feet. Nearshore Waters A Light To Moderate Chop. Isolated Showers. |
| Friday Night...Northeast To East Winds 10 To 15 Knots. Seas 1 To 2 Feet. Nearshore Waters A Light To Moderate Chop. Isolated Showers. |
| Area Forecast Discussion National Weather Service Key West FL 1031pm EST Sunday Jan 18 2026 Issued at 1030pm EST Sunday Jan 18 2026 A strong cold front blasted through the Florida Keys late this afternoon and early evening, with gale force wind gusts observed at several locations as the front pushed through. Windy conditions continue in the wake of the front at this late evening hour, with temperatures slowly falling into the lower to mid 60s. KBYX Doppler radar is void of any meteorological echo returns across the Keys marine zones. Overnight, northerlies will support continued continental, cold advection. As is often the case in this setup, there will likely be quite a range in minimum temperatures overnight, with most of the Middle and Upper Keys dropping into the lower to mid 50s owed to drainage of the cool South Florida Mainland, and the Lower Keys struggling to drop much below 60F, especially with adjacent Gulf waters still in the upper 60s to near 70F. An isolated passing light shower cannot be ruled out overnight in the fresh breezes, although most island communities will likely stay dry. No changes proposed to the inherited package for this late evening forecast update cycle. Marine Issued at 1030pm EST Sunday Jan 18 2026 A Small Craft Advisory is in effect for all Florida Keys marine zones. From synopsis, in the wake of a strong cold front, fresh to strong northerly breezes will continue overnight. An expansive high pressure system will move across the eastern United States over the next several days. This will continue to promote bouts of fresh to strong breezes throughout the work week. NOAA Key West FL Office: Watches - Warnings - Advisories FL...None. GM...Small Craft Advisory until 5am EST Monday for GMZ031>035- 042>044-052>055-072>075. |
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