textproduct: Key West

KEY MESSAGES

- Island cloud line formation will be possible in the late morning or early afternoon hours through Tuesday.

- A Coastal Flood Statement remains in effect for the Lower Keys due to higher water levels around the time of high tide.

- Conditions will remain seasonably warm and muggy, but Wednesday and Thursday may see heat index values above 100F, particularly along the Upper Keys.

AVIATION

(18Z TAFS) Issued at 232 PM EDT Mon Jun 15 2026 VFR conditions will prevail at both island terminals, but occasional MVFR CIGs may be reported in observations due to cloud cover near FL020. MVFR CIGs will be short lived and unrepresentative of the area around both air fields. Rain chances remain low, near 10 percent, due to the possibility of cloudline development. Southwest surface winds of 5 to 10 knots may become variable at times.

PREV DISCUSSION

Issued at 422 AM EDT Mon Jun 15 2026 Looking ahead, the most notable change to the forecast pattern may start mid-week. Model ensembles show the Atlantic High able to rebuild and shift west towards Bermuda. Breezes would be able to freshen somewhat and shift southeasterly. Slightly stronger breezes would limit cloud line formation. Unfortunately, this pattern shift would not help the heat and humidity. A lack of cloud cover, continuous daytime heating, and persistent southeasterly winds near the surface mean the heat will be a concern throughout the week.

MARINE

Issued at 1111 AM EDT Mon Jun 15 2026 A Coastal Flood Statement remains in effect for the Lower Keys, and mariners should expect less clearance under fixed bridges near the time of high tide. Otherwise, no watches, warnings, or advisories are in effect for the Florida Keys local waters. From synopsis, light to gentle breezes will persist through the middle of the week across the Florida Keys coastal waters. Starting Tuesday night to Wednesday, the Mid-Atlantic high will begin to strengthen and support slightly fresher breezes through the end of the week. Breezes will generally be southerly and trend southeasterly after Wednesday. Shower and thunder chances are expected to remain very low through the forecast period. The greatest chances for showers would be in the nearshore waters off the Lower and Middle Keys in the late morning and early afternoon as island cloud lines.

PRELIMINARY POINT TEMPS/POPS

Key West 81 91 82 91 / 10 10 10 10 Marathon 82 88 82 88 / 10 10 10 10

KEY WATCHES/WARNINGS/ADVISORIES

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