textproduct: Key West

KEY MESSAGES

- Measurable rain chances will stay low for each forecast period through this weekend, generally at 30% or less.

- Conditions will remain seasonably warm and muggy.

- There will be little relief in the warm temperatures overnight, with minimum temperatures near record values in the lower to mid 80s for most communities.

AVIATION

(18Z TAFS) Issued at 144 PM EDT Fri Jun 26 2026 Scattered SHRA and isolated TSRA will move across the region throughout the remainder of the day with brief IFR VSBYs and MVFR CIGs possible at times, particularly during pockets of heavier precipitation. Due to uncertainty in the timing and coverage of the precipitation activity, have only included VCSH at KMTH at the start of the period due to recent radar trends and opted to leave VCSH out at KEYW for the time being. However, the radar trends will be monitored closely through the remainder of the day in case future amendments will be needed. Otherwise, VFR Conditions will prevail throughout the period at both terminals outside of any precip activity with winds out of the ESE around 10 kts.

MARINE

Issued at 543 AM EDT Fri Jun 26 2026 A broad high pressure system centered over the North Atlantic will continue to extend westward to the Florida Peninsula through early next week. The high will fluctuate in strength and location, while maintaining east to southeast breezes. This will support bouts of light to gentle breezes becoming gentle to moderate at times, mainly in the overnight hours. In addition, scattered showers and isolated storms will move across all coastal waters of the Florida Keys at times, which could produce blinding downpours, gusty winds, and occasional lightning strikes.

PREV DISCUSSION

Issued at 543 AM EDT Fri Jun 26 2026 Typical summer weather continues to occur in the Florida Keys on another late June day. Across the island chain temperatures are in the mid 80s with dewpoints in the mid 70s making it yet again feel pretty muggy out there. According to Nighttime Microphysics skies are partly cloudy. Along the Reef, marine observation sites are reporting easterly winds at near 10 knots. Scattered showers have persisted overnight mostly in the northern Gulf waters and distant Straits with only a few light showers brushing the Upper Keys last night.

A typical late June pattern will keep persisting across the Keys through this weekend as the Atlantic high pressure remains in charge. East to southeast winds will slightly freshen to 10 to 15 knots through the day today and hold through tonight before slightly slackening again this weekend. High temperatures near 90 and dewpoints in the mid to upper 70s will result in higher heat index values. At this time we are below Heat Advisory criteria (108F to 112F) but some locations could get close to those values in the peak of the sun. Rain chances will remain near climatology with most periods at 30%, resulting in isolated to scattered showers with a few thunderstorms possible. Not much is changing from the last few days and not much is expected to change for the coming days either therefore not much adjusting was needed and our forecast is on track as of now!

KEY WATCHES/WARNINGS/ADVISORIES

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