Straits of Florida from Ocean Reef to Craig Key out 20 NM Marine Forecast
| This Afternoon...East To Southeast Winds 5 To 10 Knots. Seas 1 To 2 Feet. Wave Detail: East To Southeast 1 Foot At 4 Seconds. A Slight Chance Of Showers And Thunderstorms. |
| Tonight...East Winds 5 To 10 Knots, Increasing To 10 To 15 Knots. Seas 1 To 2 Feet, Building To Around 2 Feet. Wave Detail: East To Southeast 2 Feet At 4 Seconds. A Slight Chance Of Showers And Thunderstorms. |
| Monday...East To Southeast Winds Near 10 Knots. Seas Around 2 Feet. Wave Detail: East 2 Feet At 4 Seconds. A Slight Chance Of Showers And Thunderstorms. |
| Monday Night...East Winds 10 To 15 Knots. Seas 2 To 3 Feet. A Slight Chance Of Showers And Thunderstorms. |
| Tuesday...East Winds Near 10 Knots. Seas Around 2 Feet. A Chance Of Showers With A Slight Chance Of Thunderstorms. |
| Tuesday Night...East To Southeast Winds 10 To 15 Knots. Seas 2 To 3 Feet. A Chance Of Showers And Thunderstorms. |
| Wednesday...East To Southeast Winds 10 To 15 Knots. Seas 2 To 3 Feet. A Chance Of Showers And Thunderstorms. |
| Wednesday Night...East To Southeast Winds 10 To 15 Knots. Seas 2 To 3 Feet. A Chance Of Showers And Thunderstorms. |
| Thursday...East To Southeast Winds 5 To 10 Knots. Seas 1 To 2 Feet. A Slight Chance Of Showers And Thunderstorms. |
| Thursday Night...East Winds Near 10 Knots. Seas Around 2 Feet. A Chance Of Showers And Thunderstorms. |
| Area Forecast Discussion National Weather Service Key West FL 1049am EDT Sunday August 23 2026 Issued at 1016am EDT Sunday August 23 2026 Surface analysis continues to depict a split ridge pattern, with a climatological high pressure system centered between Bermuda and the Azores in the North Atlantic, separated from a weak area of high pressure over the Gulf by a weak trough north of the Leeward and Windward Islands. The 12z morning sounding at KEY sampled quasi-steady geopotential heights, with an uncapped environment, along with an unstable and moist environment below the 850 mb isobaric surface. The sounding also sampled mean southerly flow up to around 5 kft, with GOES-19 visible satellite imagery indicating a discernible Cuban shadow progressing across the Straits of Florida. A bit of a challenging forecast for the balance of today. Convective allowing model (CAM) guidance suggests possible cloud line formation later this afternoon, as heating of the South Florida Mainland causes winds to variable for a bit this afternoon. We are a bit skeptical of this, as ridging in the North Atlantic continues to become better established. The forecast calls for slight rain and thunder chances from any developing cloud line, temperatures peaking near 90, and dew points in the normal August mid to upper 70s. No changes proposed to the inherited forecast. Marine Issued at 1016am EDT Sunday August 23 2026 Conditions will be somewhat favorable for island cloud line formation, mainly in the vicinity of the Lower and Middle Keys. Any cloud line may produce a few waterspouts. Mariners are reminded that a waterspout would most likely appear beneath a dark, flat bottom of a building cumulus line, just at the hint of rain. From synopsis, a split ridge pattern remains in place across the Florida Keys coastal waters. This will promote generally light to gentle southeast to east breezes through tonight, becoming variable at times during the afternoon hours. While North Atlantic ridging builds westward, east to southeast breezes will become more established from tonight through Thursday, becoming gentle and at times moderate during the overnight hours. NOAA Key West FL Office: Watches - Warnings - Advisories FL...None. GM...None. |
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