Straits of Florida from Craig Key to West End of Seven Mile Bridge out 20 - 60 NM Marine Forecast
| Tonight...Northeast To East Winds Near 20 Knots, Decreasing To 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 220pm EST Wednesday Jan 21 2026 Issued at 415am EST Wednesday Jan 21 2026 A series of clipper systems across the Great Lakes over the past few days weakened the high over the Carolinas, and the high will make its way out into the Atlantic by Thursday. The pressure gradient will weaken over the Keys, and breezy conditions are not expected for the end of the work week. Broad confluence in the low levels prompted a 30% chance of showers tonight and a slight chance on Thursday. Temperatures will remain above normal through the weekend. Highs in the lower 80s are possible on Saturday and Sunday. Dew points, sadly, may rebound to the lower 70s. Aloft, skies will dry out and shower chances are 10% at most through Monday. Elsewhere in the country, the forecast will be much more complicated. While the clipper lows weakened the Carolina high, they paved the way for a very sharp longwave trough to dig into the central United States. This low will phase together with a slow moving shortwave located over New Mexico tomorrow to Friday. Thus, the environment sets up for a very broad, very amplified winter storm stretching from Texas to the Carolinas. How exactly does this relate to Florida Keys weather? This winter storm will be able to form coastal lows, and statistical models suggest a coastal low could develop off the North Carolina outer bank. In this event, arctic air could be directed south towards the Keys. A cold front associated with this system is forecast to move across the island chain sometime early next week. The most recent model guidance suggests frontal passage next Monday to Tuesday, but the timing and magnitude will change given newer data. Keep an eye on the forecast and to the north, because the upcoming winter system is going to be dramatic. Marine Issued at 1123am EST Wednesday Jan 21 2026 A Small Craft Advisory remains in effect for Hawk Channel and the Florida Straits. Elsewhere, Small Craft Should Exercise Caution Until Winds Decrease. From synopsis, a broad high pressure system located over the Carolinas will slowly weaken as it slides into the western Atlantic during the work week. Breezes will slacken as the pressure gradient diminishes, and gentle to moderate breezes are expected across the nearshore and offshore waters by Thursday. Weekend conditions are more uncertain because a sequence of strong low pressure systems over the southeastern United States. A col region could form over the Keys on Sunday and support light to gentle breezes, or the Keys could be stuck under gentle to moderate northwesterlies. NOAA Key West FL Office: Watches - Warnings - Advisories FL...None. GM...Small Craft Advisory until 1am EST Thursday for GMZ042>044- 052>055-072>075. |
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