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. - Rain and thunder chances will remain on a plateau through tonight, and gradually decline thereafter.

- Breezy conditions continue for the Island Chain through this evening. Small Craft Should Exercise Caution across all the Florida Keys coastal waters.

AVIATION

(18Z TAFS) Issued at 132 PM EDT Tue May 19 2026 VFR conditions will prevail at both EYW and MTH through the TAF period. Scattered showers will continue to move northwest through the Straits into the island chain through the early evening, therefore, VCSH is included at both EYW and MTH. If direct shower impact is to occur TEMPOs will be included for reduced visibilities, lower cloud ceilings, and gusty winds. Near surface winds outside of convection will be easterly at near 10 knots.

MARINE

Issued at 1124 AM EDT Tue May 19 2026 Small Craft Should Exercise Caution headlines are in effect for all Florida Keys coastal waters through this evening. From synopsis, surface high pressure centered north of Bermuda will continue to promote moderate to fresh east to southeast breezes through tonight. Highest breezes will prevail through this evening. Breezes will then slowly slacken before the weekend with peaks expected during the evenings and lulls during the day. Rain and thunder chances will remain above normal through much of the week.

FORECAST

Surface high pressure across the western North Atlantic will continue to dominate the Keys weather for the next several days. The high will be at its strongest today with gradual weakening each day thereafter. Therefore, breezy conditions are expected to continue through this evening out of the east with modest slackening afterwards. Moisture is expected to remain elevated through at least Wednesday night before slightly drier air rotates in from the southeast for late week into the holiday weekend. This will result in chances of rain becoming slight chances. 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.

KEY WATCHES/WARNINGS/ADVISORIES

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