National Weather Service

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Drought Conditions Deteriorated a Little Over Eastern Areas And Improved a Little Over Western Areas Of South Florida.

Hazardous Weather Conditions

Heat Advisory in effect from August 18, 11:00 AM EDT until August 18, 07:00 PM EDT

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

80°F

27°C

Humidity	85%
Wind Speed	S 3 mph
Barometer	30.07 in (1018.3 mb)
Dewpoint	75°F (24°C)
Visibility	10.00 mi
Heat Index	85°F (29°C)
Last update	18 Aug 12:53 am EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

23 Miles NNW Long Key FL

Heat Advisory August 18, 11:00am until August 18, 07:00pm

Click here for hazard details and duration

Heat Advisory

Overnight
Low: 78 °F
Clear
Tuesday
High: 93 °F
Sunny
Tuesday Night
Low: 77 °F
Partly Cloudy
Wednesday
High: 92 °F
Sunny then
Slight Chance
T-storms
Wednesday Night
Low: 78 °F
Slight Chance
T-storms
Thursday
High: 91 °F
Slight Chance
T-storms
Thursday Night
Low: 80 °F
Partly Cloudy
Friday
High: 88 °F
Mostly Sunny
then Slight
Chance
T-storms
Friday Night
Low: 81 °F
Slight Chance
T-storms

Detailed Forecast

Overnight

Clear, with a low around 78. Calm wind.

Tuesday

Sunny, with a high near 93. Heat index values as high as 103. Light and variable wind becoming west 5 to 10 mph in the afternoon.

Tuesday Night

Partly cloudy, with a low around 77. West wind 5 to 11 mph, with gusts as high as 18 mph.

Wednesday

A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 92. Heat index values as high as 102. Light and variable wind becoming west 5 to 10 mph in the afternoon.

Wednesday Night

A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 78. West wind 5 to 9 mph becoming calm in the evening.

Thursday

A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Calm wind becoming southwest 5 to 8 mph in the afternoon.

Thursday Night

Partly cloudy, with a low around 80. West wind around 6 mph becoming calm in the evening.

Friday

A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 88. South wind 3 to 8 mph.

Friday Night

A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 2am. Mostly clear, with a low around 81. Southeast wind 3 to 5 mph. Chance of precipitation is 20%.

Saturday

A slight chance of showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms after 2pm. Sunny, with a high near 88. Chance of precipitation is 20%.

Saturday Night

A 10 percent chance of showers and thunderstorms. Partly cloudy, with a low around 80.

Sunday

A 30 percent chance of showers and thunderstorms. Sunny, with a high near 88.

Sunday Night

A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 81.

Monday

A 30 percent chance of showers and thunderstorms. Sunny, with a high near 89.