National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Lafayette, Lafayette Regional Airport (KLFT)

Lat: 30.2°NLon: 91.99°WElev: 39ft.

Mostly Cloudy

90°F

32°C

Humidity 63%
Wind Speed S 5 mph
Barometer 30.11 in (1019.5 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index101°F (38°C)
Last update 15 Aug 10:53 am CDT
Extended Forecast for

Mermentau LA

  • Today

    Today: Showers and thunderstorms likely, mainly between 1pm and 2pm. Mostly sunny, with a high near 93. Heat index values as high as 106. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 93 °F

    T-storms
    Likely

  • Tonight

    Tonight: Mostly clear, with a low around 77. South wind around 5 mph becoming calm in the evening.

    Low: 77 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 10am. Sunny, with a high near 95. Heat index values as high as 107. Calm wind. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 95 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 77. Calm wind.

    Low: 77 °F

    Partly Cloudy

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms. Sunny, with a high near 95. Calm wind becoming northwest around 5 mph.

    High: 95 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76. Calm wind.

    Low: 76 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94. Calm wind becoming northeast around 5 mph.

    High: 94 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 75. Calm wind.

    Low: 75 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Sunny, with a high near 94. Calm wind becoming northeast around 5 mph.

    High: 94 °F

    Chance
    T-storms

Detailed Forecast

Today
Showers and thunderstorms likely, mainly between 1pm and 2pm. Mostly sunny, with a high near 93. Heat index values as high as 106. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Mostly clear, with a low around 77. South wind around 5 mph becoming calm in the evening.
Saturday
A chance of showers, with thunderstorms also possible after 10am. Sunny, with a high near 95. Heat index values as high as 107. Calm wind. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Partly cloudy, with a low around 77. Calm wind.
Sunday
A 50 percent chance of showers and thunderstorms. Sunny, with a high near 95. Calm wind becoming northwest around 5 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76. Calm wind.
Monday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94. Calm wind becoming northeast around 5 mph.
Monday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 75. Calm wind.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Sunny, with a high near 94. Calm wind becoming northeast around 5 mph.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 74.
Wednesday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 94.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 75.
Thursday
A 50 percent chance of showers and thunderstorms. Sunny, with a high near 94.
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ABOUT THIS FORECAST

 
Point Forecast:
Mermentau LA
 30.18°N 92.58°W
Last Update:
7:45 am CDT Aug 15, 2025
Forecast Valid:
11am CDT Aug 15, 2025-6pm CDT Aug 21, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation