Marine Weather Net

Grassy Key, FL Weather Forecast




Grassy Key, Florida

 Lat: 24.72N, Lon: 81.05W

Current Conditions Updated: 553 PM EDT WED JUL 29 2026

Clear


Temp: 89°F
  • Humidity:
  • 65%
  • Winds:
  • 7 MPH W
  • Gusts:
  • N/A MPH
  • Barometer:
  • 29.96 in.
  • Dewpoint:
  • 76°F
  • Heat index:
  • 100°F

  • Sunrise:
  • 6:49 AM EDT
  • Sunset:
  • 8:08 PM EDT
  • Moonrise:
  • 8:28 PM EDT
  • Moonset:
  • 6:43 AM EDT

TONIGHT

PARTLY CLOUDY
Lo: 81°F

THURSDAY

MOSTLY SUNNY
Hi: 91°F
Lo: 81°F
Precip: 10%

FRIDAY

PARTLY CLOUDY
Hi: 91°F
Lo: 81°F
Precip: 10%

SATURDAY

PARTLY SUNNY
Hi: 91°F
Lo: 81°F
Precip: 20%
Weather Forecast In Detail:
Forecast Issued: 400 PM EDT Wed Jul 29 2026

Tonight...Partly cloudy. Lows in the lower 80s. Southwest winds near 15 mph, Decreasing to 5 to 10 mph.
Thursday...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Southwest winds 5 to 10 mph. Chance of rain 10 percent.
Thursday Night...Partly cloudy. Lows in the lower 80s. Southwest winds 5 to 10 mph, becoming light and variable.
Friday...Partly cloudy with a slight chance of showers and thunderstorms. Highs in the lower 90s. Light and variable winds, becoming south to southwest and increasing to 5 to 10 mph. Chance of rain 10 percent.
Friday Night...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 80s. Light and variable winds. Chance of rain 10 percent.
Saturday...Partly sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20 percent.
Saturday Night And Sunday...Mostly cloudy with a slight chance of showers. Lows in the lower 80s. Highs near 90. Chance of rain 10 percent.
Sunday Night And Monday...Mostly cloudy with a slight chance of showers. Lows in the lower 80s. Highs near 90. Chance of rain 20 percent.
Monday Night...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 80s. Chance of rain 20 percent.
Tuesday...Partly cloudy with a chance of showers and thunderstorms. Highs near 90. Lows in the lower 80s. Chance of rain 30 percent.
Wednesday...Partly cloudy with a chance of showers and thunderstorms. Highs near 90. Lows in the lower 80s. Chance of rain 30 percent.
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