Marine Weather Net

Siesta Key, FL Weather Forecast




Siesta Key, Florida

 Lat: 27.28N, Lon: 82.57W

Current Conditions Updated: 953 AM EDT WED AUG 19 2026

Mostly Cloudy
Temp: 88°F
  • Humidity:
  • 72%
  • Winds:
  • 15 MPH WNW
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.02 in.
  • Dewpoint:
  • 78°F
  • Heat index:
  • 101°F

  • Sunrise:
  • 7:02 AM EDT
  • Sunset:
  • 8:02 PM EDT
  • Moonrise:
  • 1:45 PM EDT
  • Moonset:
  • N/A EDT

REST OF TODAY

MOSTLY SUNNY
Hi: 91°F
Lo: 85°F
Precip: 40%

THURSDAY

MOSTLY SUNNY
Hi: 91°F
Lo: 77°F
Precip: 60%

FRIDAY

MOSTLY SUNNY
Hi: 90°F
Lo: 79°F
Precip: 50%

TUESDAY

MOSTLY SUNNY
Hi: 91°F
Precip: 20%
Weather Forecast In Detail:
Forecast Issued: 817 AM EDT Wed Aug 19 2026

HEAT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING
Rest Of Today...Mostly sunny with scattered showers with isolated thunderstorms. Highs in the lower 90s. Northwest winds 10 to 15 mph. Chance of rain 40 percent. Heat index values up to 110.
Tonight...Partly cloudy with isolated showers and thunderstorms. Humid with lows around 80. West winds 5 to 10 mph. Chance of rain 20 percent.
Thursday...Mostly sunny with scattered thunderstorms. Scattered showers in the morning, then numerous showers in the afternoon. Humid with highs in the lower 90s. West winds 5 to 10 mph. Chance of rain 60 percent. Heat index values up to 109.
Thursday Night...Mostly cloudy in the evening, then becoming partly cloudy. Isolated thunderstorms. Isolated showers in the evening, then scattered showers after midnight. Humid with lows in the upper 70s. Northwest winds 5 to 10 mph, becoming west after midnight. Chance of rain 40 percent.
Friday...Mostly sunny with scattered showers and thunderstorms. Humid with highs around 90. Southwest winds 5 to 10 mph. Chance of rain 50 percent. Heat index values up to 106.
Friday Night...Partly cloudy with scattered showers and thunderstorms. Lows in the upper 70s. Highs around 90. Chance of rain 50 percent.
Saturday...Partly cloudy with scattered showers and thunderstorms. Lows in the upper 70s. Highs around 90. Chance of rain 50 percent.
Sunday...Partly cloudy with scattered showers and thunderstorms. Lows in the upper 70s. Highs around 90. Chance of rain 50 percent.
Sunday Night...Partly cloudy with isolated thunderstorms. Scattered showers, mainly in the evening. Lows in the upper 70s. Chance of rain 30 percent.
Monday And Monday Night...Mostly clear. Isolated showers and thunderstorms. Highs in the lower 90s. Lows in the upper 70s. Chance of rain 20 percent.
Tuesday...Mostly sunny. Isolated showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 105.
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