textproduct: Key West
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
- Seasonably warm conditions will continue through the rest of the work week.
- Light to gentle breezes will continue for the next couple of days, with a brief uptick to gentle to moderate heading into the weekend.
- Rain chances will remain low through at least Saturday. A wetter pattern is possible beginning Sunday, although there is low confidence in rainfall amounts at this time.
DISCUSSION
Issued at 1020 AM EDT Wed Apr 29 2026 The 12z morning sounding at KEY sampled a boundary layer with meager lapse rates and modest mean moisture, capped at around 800 mb by a 3.5C temperature inversion from 800-750 mb. This inversion is associated with low- and mid-level ridging extending across the Gulf to the Bahama Islands. Available South Florida Doppler radars are detecting nearly nil meteorological echo returns at this late morning hour, with GOES-19 visible satellite imagery highlighting weak anticyclonic flow and fair weather cumuli across the Florida Keys and the adjacent nearshore and offshore marine zones. A rather routine forecast for thie afternoon, with highs peaking in the mid 80s under mostly sunny skies, and rain-free conditions. No changes proposed to the inherited forecast.
MARINE
Issued at 1020 AM EDT Wed Apr 29 2026 There are no watches, warnings, or advisories in effect for the Florida Keys local waters. From synopsis, a small high pressure system centered east of the Florida Peninsula will drift southeastward today, resulting in gentle to moderate easterlies trending downwards and shifting southeast to south. A weak low pressure system swinging off the southeast coast on Thursday will slacken local breezes further and introduce variable direction. Another weak low will push across Florida late this week and into the weekend, likely supporting a period of gentle to moderate southeasterly breezes. Winds should slacken again later in the weekend as the pressure gradient weakens.
AVIATION
(15Z TAFS) Issued at 1020 AM EDT Wed Apr 29 2026 VFR conditions will prevail at both island terminals through 12z Thursday morning, with near-nil rain chances. Near-surface winds out of the southeast will remain sustained at 4 to 7 knots.
PRELIMINARY POINT TEMPS/POPS
Key West 85 76 85 76 / 10 10 0 0 Marathon 84 76 85 76 / 10 10 0 0
KEY WATCHES/WARNINGS/ADVISORIES
FL...None. GM...None.
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