Areas of Severe Thunderstorms and Excessive Rainfall Sunday

Scattered strong to severe thunderstorms may pose a risk for damaging wind gusts over the Carolinas, southeast Virginia, and the Tennessee Valley Sunday afternoon then the northern Plains from late afternoon into Sunday night. Monsoonal thunderstorms may cause locally considerable flash, urban, and small stream flooding in the Southwest U.S. the next few days. Read More >

7-Day Zone Forecast for Lower St. Martin (Text-Only)
NWS Forecast for: Lower St. Martin
Issued by: National Weather Service Lake Charles, LA
Last Update: 306 AM CDT Sun Jul 19 2026


Today: Sunny. Highs in the mid 90s. Northwest winds around 5 mph. Heat index values up to 107.

Tonight: Partly cloudy. Humid with lows in the upper 70s. West winds around 5 mph. Heat index values up to 107 early in the evening.

Monday: Sunny with highs in the mid 90s. Northwest winds 5 to 10 mph. Heat index values up to 108.

Monday Night: Mostly clear. Humid with lows in the upper 70s. West winds around 5 mph. Heat index values up to 107 early in the evening.

Tuesday: Mostly sunny. Humid with highs in the mid 90s. West winds 5 to 10 mph. Heat index values up to 109.

Tuesday Night Through Wednesday Night: Partly cloudy. Lows in the upper 70s. Highs in the mid 90s. Heat index values up to 115.

Thursday: Mostly sunny with a chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 40 percent. Heat index values up to 110.

Thursday Night Through Friday Night: Partly cloudy. Lows in the upper 70s. Highs in the mid 90s. Heat index values up to 110.

Saturday: Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 40 percent. Heat index values up to 105.







Zone Forecast: Lower St. Martin

Visit your local NWS office at: https://www.weather.gov/lch