| NWS Forecast for: Upper St. Martin Issued by: National Weather Service Lake Charles, LA Last Update: 306 PM CDT Sat Aug 1 2026 |  |
| Tonight: Partly cloudy with a slight chance of thunderstorms. A slight chance of showers this evening, then a chance of showers after midnight. Lows in the upper 70s. Southwest winds 10 to 15 mph. Chance of rain 50 percent. Heat index values up to 107 early this evening. Sunday: Mostly sunny. Highs in the lower 90s. Northwest winds 5 to 10 mph. Sunday Night: Mostly clear. Lows in the mid 70s. West winds around 5 mph in the evening, becoming light and variable. Monday: Sunny. Highs in the mid 90s. West winds around 5 mph. Monday Night: Clear with lows in the mid 70s. Southwest winds around 5 mph. Tuesday Through Wednesday Night: Mostly clear. Highs in the mid 90s. Lows in the mid 70s. Heat index values up to 105. Thursday: Sunny. A chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 30 percent. Heat index values up to 105. Thursday Night: Partly cloudy in the evening, then becoming mostly clear. Lows in the mid 70s. Friday: Sunny. A chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 30 percent. Heat index values up to 105. Friday Night: Partly cloudy in the evening, then clearing. Lows in the mid 70s. Saturday: Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 40 percent. Heat index values up to 110. | |
| Zone Forecast: Upper St. Martin | |
Visit your local NWS office at: https://www.weather.gov/lch |