textproduct: Key West

KEY MESSAGES

- Very warm and humid conditions over the next few days will lead to a generally moderate risk of heat illness with periods of high risk conditions. - Chances of showers and a slight chance of thunderstorms today will decrease to slight chance of showers and storms tonight into the holiday weekend.

- Gentle to moderate easterly breezes will continue for the next several days peaking in the evenings and overnight and lulling in the afternoon.

FORECAST

Surface high pressure across the western North Atlantic will continue to dominate the Keys weather for the next several days. The high will maintain its strength over the next several days to week meandering in place as it does so. Gentle to moderate east 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 at least tonight before slightly drier air rotates in from the southeast for the remainder of the week and into the holiday weekend. This will result in chances of rain today becoming slight chances for tonight on through the extended 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 near 80 degrees with any showers.

MARINE

Issued at 445 AM EDT Wed May 20 2026 There are currently no watches, warnings, or advisories in effect across the Florida Keys coastal waters. From synopsis, surface high pressure centered north of Bermuda will continue to support gentle to moderate breezes across the Florida Keys waters. Breezes are on track to slowly decrease during the week with peaks expected during the evenings and lulls during the day. Rain and thunder chances will remain above normal through much of the week.

AVIATION

(06Z TAFS) Issued at 445 AM EDT Wed May 20 2026 VFR conditions are expected to persist at both EYW and MTH terminals through the TAF period. Occasional periods of MVFR CIGs are possible, though, these are expected to be short-lived and mostly associated with any shower activity. Near surface winds will remain mostly easterly through the period.

CLIMATE

On this day in 1932, the daily record rainfall of 3.83 inches was recorded in Key West. Rainfall records for Key West date back to 1871.

On this day in 2024, the daily record rainfall of 7.08" was recorded in Marathon. This also ranks as the wettest day ever recorded in May. Rainfall records for Marathon date back to June 1950.

PRELIMINARY POINT TEMPS/POPS

Key West 90 81 91 81 / 30 20 20 20 Marathon 86 80 87 80 / 30 20 20 20

KEY WATCHES/WARNINGS/ADVISORIES

FL...None. GM...None.