textproduct: Key West

KEY MESSAGES

-Fresh northwest to north breezes will prevail through at least the mid to late morning hours following yesterday morning's cold front.

-Rain chances near nil expected through the end of the week. -Coldest air of the season so far has arrived! Overnight lows expected to fall into the upper 40s to near 50 degrees in the Upper Keys and mid to upper 50s for the Middle and Lower Keys.

-A slow moderating trend is expected to begin on Friday with temperatures rebounding into the 70s during the day with overnight lows in the 60s.

FORECAST

In the wake of the front yesterday, breezy conditions are expected to continue early this morning. High pressure over southeast Texas this morning will continue moving to the east to southeast throughout the week while slowly weakening. Due to the slow movement of the high, the northwest to north flow will linger into New Years Day/Thursday night before breezes start to shift to the northeast. Even though breezes slacken a little bit today, a subtler wind surge is anticipated tonight into New Years Day due to the mainland nocturnal land breeze. As we approach the weekend, the high will move directly overhead which will result in a period of light to variable breezes. In addition, the coldest temperatures are expected to occur tonight just in time to ring in 2026! Overnight lows into New Years Day morning are expected to be in the upper 40s for the Upper Keys and mid to upper 50s for the Middle and Lower Keys. Temperatures will start to slowly rebound beginning Friday with highs getting back towards 70 degrees and overnight lows back into the 60s. Over the weekend, temperatures will be back to near normal which is highs in the mid 70s and overnight lows in the lower to mid 60s. Dry air will remain entrenched across the Keys through the period leading to nil rain chances through Saturday.

Another potentially reinforcing/weak front may press through the Keys during the second half of the weekend into early next week. However, the timing, intensity, and if this front will even push through remains to be seen. Stay tuned!

MARINE

Issued at 430 AM EST Wed Dec 31 2025 A Small Craft Advisory remains in effect for all the Florida Keys coastal waters this morning. From synopsis, mainly fresh northwest to north breezes will continue this morning. Then, high pressure currently over southeast Texas will slowly weaken as it moves east to southeast into the eastern Gulf promoting gradually slackening breezes. Once the high moves overhead towards the end of the week/weekend, breezes become light and variable.

AVIATION

(06Z TAFS) Issued at 430 AM EST Wed Dec 31 2025 VFR conditions are expected to prevail at both EYW and MTH through the TAF period. Some brief bouts of MVFR CIGs are possible, especially at EYW, given current satellite obs, though these should be short-lived enough to omit from TAF mention. Northerly crosswinds of 10 to 15 knots with gusts above 20 knots will persist until late afternoon, when slackening will occur.

CLIMATE

On this day in 1917, the daily record low temperature of 47F was recorded at Key West. Also on this day in 1956, the daily record low temperature of 48F was recorded at Marathon. Temperature records for Key West date back to 1872, and for Marathon to 1950.

PRELIMINARY POINT TEMPS/POPS

Key West 65 58 68 61 / 0 0 0 0 Marathon 64 54 66 58 / 0 0 0 0

KEY WATCHES/WARNINGS/ADVISORIES

FL...None. GM...Small Craft Advisory until 11 AM EST this morning for GMZ031>035- 042>044-052>055-072>075.