Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM Marine Forecast
| Overnight...Northeast To East Winds 15 To 20 Knots. Seas 5 To 8 Feet, Occasionally To 10 Feet, Subsiding To 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: Northeast To East 8 Feet At 7 Seconds. Scattered Showers. |
| Thursday...Northeast To East Winds Near 15 Knots, Decreasing To 10 To 15 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet, Subsiding To 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Northeast To East 5 Feet At 7 Seconds, Becoming Northeast To East 4 Feet At 6 Seconds. Scattered Showers. |
| Thursday Night...Northeast To East Winds 10 To 15 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Northeast To East 3 Feet At 6 Seconds. Isolated Showers. |
| Friday...Northeast To East Winds 10 To 15 Knots. Seas 2 To 3 Feet. Isolated Showers. |
| Friday Night...Northeast To East Winds 10 To 15 Knots. Seas 2 To 3 Feet. Isolated Showers. |
| Saturday...East Winds 10 To 15 Knots. Seas 2 To 3 Feet. Isolated Showers. |
| Saturday Night...East To Southeast Winds 10 To 15 Knots. Seas 2 To 3 Feet. |
| Sunday...East To Southeast Winds 10 To 15 Knots. Seas 2 To 3 Feet. Isolated Showers. |
| Sunday Night...East To Southeast Winds Near 10 Knots, Becoming Variable And Decreasing To 5 To 10 Knots. Seas Around 2 Feet. Isolated Showers. |
| Monday...Variable Winds 5 To 10 Knots, Becoming North And Increasing To Near 10 Knots. Seas Around 2 Feet, Building To 2 To 4 Feet, Occasionally To 5 Feet. Isolated Showers. |
| Monday Night...North Winds 10 To 15 Knots, Increasing To 15 To 20 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet, Building To 5 To 8 Feet, Occasionally To 10 Feet. Isolated Showers. |
| Area Forecast Discussion National Weather Service Key West FL 1025pm EST Wednesday Jan 21 2026 Issued at 1030pm EST Wednesday Jan 21 2026 The 00z evening sounding at KEY highlighted a relatively thick mid- level cloud deck between 5-8 kft, with a formidable inversion just above based at around 750 mb. CIMSS satellite-derived total precipitable water product depicts a moisture surge currently approaching the Florida Keys from the east. Isentropic analysis for the 300K potential temperature surface derived from the College of DuPage product depicts decent lift, with the 300K surface right at the interface of the mid- level cloud deck and the inversion. The result is light showers advecting from east to west across the Keys being detected by available KBYX and KAMX Doppler radar, struggling to surface the trek to the Lower Keys likely owed to modest entrainment from the dry air aloft. Surface- based observations depict partly to mostly cloudy skies across the Keys, with temperatures generally in the upper 60s. The forecast calls for slackening breezes overnight as high pressure off the Mid- Atlantic continues to weaken and slide eastward, along with possible light showers, especially in the Middle and Upper Keys. No changes proposed to the inherited package for the overnight period. Marine Issued at 1030pm EST Wednesday Jan 21 2026 A Small Craft Advisory remains in effect for the Straits of Florida for residual seas up to 8 feet. In addition, Small Craft Should Exercise Caution Headlines remain posted for Hawk Channel, with northeast winds remaining 15 to 20 knots overnight. From synopsis, a broad high pressure system located just off the Mid-Atlantic will continue slowly weaken as it slides further eastward through the rest of the work week. Breezes will slacken as the pressure gradient weakens, and gentle to moderate breezes are expected across the nearshore and offshore waters for Thursday through Saturday, becoming light to gentle for Sunday. A strong winter storm will impact the Southeast over the weekend, driving a strong frontal boundary through the Keys marine zones Monday afternoon and evening. Winds will clock around to the north in its wake for early next week, becoming fresh to strong. NOAA Key West FL Office: Watches - Warnings - Advisories FL...None. GM...Small Craft Advisory until 5am EST Thursday for GMZ052>055- 072>075. |
Key West FL Radar
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