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
- Very warm and humid conditions over the next few days will lead to a moderate risk of heat illness with periods of major risk conditions possible. - Quick moving showers and storms may bring bursts of heavy rainfall, reduced visibility, and gusty winds.
- Gentle to moderate east to southeast breezes will continue for the next several days peaking in the evenings and overnight and decreasing in intensity during the afternoon hours.
FORECAST
Surface high pressure near Bermuda will continue to dominate the Keys weather for the next several days. The high will maintain its strength meandering in place. Gentle to moderate east to southeast breezes are expected to continue as a result peaking in the evening and overnight and lulling during the afternoons. Moisture is expected to remain elevated through the remainder of the week and into the start of the holiday weekend. This will keep slightly above rain chances in the forecast. Instability will also remain elevated keeping thunder in the forecast throughout the period. Temperatures will remain quite consistent through the week with highs in the upper 80s to occasionally 90 degrees and overnight lows in the lower 80s to perhaps the upper 70s with any showers.
MARINE
Issued at 436 AM EDT Thu May 21 2026 There are currently no watches, warnings, or advisories in effect across the Florida Keys coastal waters. From synopsis, high pressure centered near Bermuda will maintain east to southeast gentle to moderate breezes today. This regime will continue for the next few days with breezes peaking in the evening and overnight and lulling by day. Some strengthening of this high over the holiday weekend will lead breezes becoming moderate to fresh once again.
AVIATION
(06Z TAFS) Issued at 436 AM EDT Thu May 21 2026 VFR conditions are expected to mostly persist at both EYW and MTH terminals through the TAF period. Near surface winds are expected to remain mostly easterly. There is also the potential for a few passing showers or thunderstorms during the day which may cause brief time periods of MVFR CIGs.
CLIMATE
On this day in 1929, the daily record rainfall of 3.54" was recorded in Key West. Rainfall records for Key West date back to 1871.
PRELIMINARY POINT TEMPS/POPS
Key West 90 81 91 81 / 30 20 30 20 Marathon 86 80 87 80 / 30 20 30 30
KEY WATCHES/WARNINGS/ADVISORIES
FL...None. GM...None.
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