Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM Marine Forecast
| Tonight...Northeast To East Winds Near 10 Knots, Becoming East To Southeast 5 To 10 Knots. Seas 1 To 2 Feet. Wave Detail: East 2 Feet At 5 Seconds. Scattered Showers. |
| Saturday...East Winds Near 5 Knots. Seas Around 1 Foot. Wave Detail: East 1 Foot At 4 Seconds. Isolated Showers. |
| Saturday Night...East To Southeast Winds 5 To 10 Knots. Seas Around 1 Foot. Wave Detail: East 1 Foot At 4 Seconds. Isolated Showers. |
| Sunday...East To Southeast Winds 5 To 10 Knots, Becoming Variable Near 5 Knots. Seas Around 1 Foot. Isolated Showers. |
| Sunday Night...Variable Winds Near 5 Knots, Becoming West To Northwest Near 10 Knots After Midnight. Seas Around 1 Foot, Building To 1 To 2 Feet. Isolated Showers. |
| Monday...Northwest Winds 10 To 15 Knots, Increasing To 20 To 25 Knots In The Afternoon. Seas 2 To 3 Feet, Building To 4 To 7 Feet, Occasionally To 9 Feet. Isolated Showers. |
| Monday Night...North Winds 25 To 30 Knots. Seas 5 To 8 Feet, Occasionally To 10 Feet, Building To 7 To 10 Feet, Occasionally To 13 Feet. Isolated Showers. |
| Tuesday...North To Northeast Winds 25 To 30 Knots, Decreasing To Near 25 Knots. Seas 7 To 10 Feet, Occasionally To 13 Feet. Isolated Showers. |
| Tuesday Night...Northeast To East Winds 20 To 25 Knots, Decreasing To Near 20 Knots. Seas 7 To 9 Feet, Occasionally To 11 Feet, Subsiding To 5 To 8 Feet, Occasionally To 10 Feet. Isolated Showers. |
| Wednesday...Northeast To East Winds 15 To 20 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet, Subsiding To 4 To 6 Feet, Occasionally To 7 Feet. Isolated Showers. |
| Wednesday Night...Northeast Winds 15 To 20 Knots. Seas 4 To 6 Feet, Occasionally To 7 Feet. Isolated Showers. |
| Area Forecast Discussion National Weather Service Key West FL 254pm EST Fri Nov 7 2025 Marine Issued at 254pm EST Fri Nov 7 2025 High pressure will continue to slide eastward across the central North Atlantic Saturday and Sunday. This will result breezes slackening and potentially becoming variable are times. A potent cold front will push through the Florida Keys marine zones on Monday, with fresh to strong northerlies expected in its wake for early next week. As the next high builds in behind the front, winds will shift out of the northeast and gradually slacken. However, moderate to occasional fresh breezes will remain possible. Issued at 515am EST Fri Nov 7 2025 Composite tropospheric and surface analysis depicts a shortwave trough in the central to eastern Gulf, impinging on the Florida Keys. At the surface, a complex interaction of a series of frontal boundaries remain in the vicinity of the Florida Keys, resulting in light to gentle synoptic flow. KBYX radar is highlighting a few clusters of showers and thunderstorms in the southwestern Straits of Florida. Stagnant temperatures remain in the mid to upper 70s. The confidence in the forecast for today is rather challenging. All available statistical numerical weather prediction guidance suggests today should be quite wet, given the synoptic forcing for ascent. Our local meteorological expertise suggests otherwise, supported by a sampled surface to 900 mb dry-adiabatically mixed profile. We will roll with chance level Probability of Precipitation today, with a potential boom or bust rainfall forecast (although amounts should be light either way). The main weather story will be the strong early-season cold front forecast to roll through the Keys on Monday, with cool and windy conditions in its wake. Although models suggest mostly sunny and dry conditions, we expect bouts of low cirrostratus decks. Highs will generally be in the mid 70s, and lows in the lower 60s. NOAA Key West FL Office: Watches - Warnings - Advisories FL...None. GM...None. |
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