Marine Weather Net

Grassy Key, FL Weather Forecast




Grassy Key, Florida

 Lat: 24.72N, Lon: 81.05W

Current Conditions Updated: 953 AM EDT WED MAY 6 2026

Clear


Temp: 81°F
  • Humidity:
  • 71%
  • Winds:
  • 8 MPH SE
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.02 in.
  • Dewpoint:
  • 71°F
  • Heat index:
  • 85°F

  • Sunrise:
  • 6:44 AM EDT
  • Sunset:
  • 7:55 PM EDT
  • Moonrise:
  • N/A EDT
  • Moonset:
  • 10:13 AM EDT

TODAY

MOSTLY SUNNY
Hi: 87°F
Lo: 79°F

THURSDAY

MOSTLY SUNNY
Hi: 87°F
Lo: 79°F

FRIDAY

MOSTLY SUNNY
Hi: 87°F
Lo: 79°F

TUESDAY

PARTLY CLOUDY
Hi: 87°F
Precip: 20%
Weather Forecast In Detail:
Forecast Issued: 357 AM EDT Wed May 06 2026

Today...Mostly sunny. Highs in the mid to upper 80s. East to southeast winds 5 to 10 mph.
Tonight...Mostly clear. Lows in the upper 70s. East to southeast winds 5 to 10 mph.
Thursday...Mostly sunny. Highs in the mid to upper 80s. Southeast winds 5 to 10 mph.
Thursday Night...Mostly clear. Lows in the upper 70s. East to southeast winds 5 to 10 mph.
Friday...Mostly sunny. Highs in the mid to upper 80s. Southeast winds near 5 mph.
Friday Night...Partly cloudy. Lows near 80. Highs in the mid to upper 80s.
Saturday...Partly cloudy. Lows near 80. Highs in the mid to upper 80s.
Sunday...Partly cloudy. Lows near 80. Highs in the mid to upper 80s.
Monday And Monday Night...Partly cloudy with a slight chance of showers and thunderstorms. Highs in the mid to upper 80s. Lows in the upper 70s. Chance of rain 10 percent.
Tuesday...Partly cloudy with a slight chance of showers and thunderstorms. Highs in the mid to upper 80s. Chance of rain 20 percent.
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