textproduct: Key West

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 hours, and lulling during the afternoon hours.

FORECAST

Surface high pressure centered just east of Bermuda will continue to dominate the Keys weather through the holiday weekend. A secondary high is expected to drift southeastward from the Canadian Maritimes and New England replacing the current high to the east of Bermuda. This will continue to promote moderate breezes this morning becoming gentle to moderate this afternoon. Breezes will continue to peak in the evenings and overnight and lull in the afternoon as the secondary high replaces the previous high. As the secondary high takes over during the weekend, breezes will freshen back to fresh east to southeast breezes through the holiday into the middle of next week. Persistent moisture rotating around the ridge will keep mainly chances for showers and a slight chance of thunderstorms in the forecast through the holiday weekend. Temperatures will remain quite consistent through the holiday weekend 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 434 AM EDT Fri May 22 2026 There are currently no watches, warnings, or advisories in effect across the Florida Keys coastal waters. From synopsis, high pressure centered just east of Bermuda will maintain mainly moderate breezes this morning before slackening to gentle to moderate breezes this afternoon. The surface pattern will remain generally unchanged for the next few days, with breezes peaking to near fresh in the evening and overnight hours, slackening to gentle to moderate in the late morning and afternoon hours. A second high pressure system will reinforce the first, supporting fresh east to southeast breezes late in the weekend into early next week.

AVIATION

(06Z TAFS) Issued at 434 AM EDT Fri May 22 2026 VFR conditions are largely expected to persist at both EYW and MTH terminals through the TAF period. Near surface winds will remain east to southeast with occasional gusts of 15 to 20 knots, especially early. Moisture surges will continue to move through the Keys in the east to southeast flow keeping chances of showers in the forecast. Any shower will be capable of becoming a thunderstorm with MVFR CIGs and VIS the most likely outcomes from this activity. Timing and placement of this activity remain uncertain and we will amend for VCSH when necessary.

CLIMATE

On this day in 2023, the daily record warm low temperature of 82F was recorded in Key West. Temperature records for Key West date back to 1872.

Also, in 2025, the daily record warm low temperature of 82F was recorded in Marathon. Temperature records for Marathon date back to June 1950.

PRELIMINARY POINT TEMPS/POPS

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

KEY WATCHES/WARNINGS/ADVISORIES

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