Weather in Mermentau, Louisiana
Live weather conditions. Source: Open-Meteo
Updated May 24, 2026 · 04:27 PM ET · Refreshes every hour
79°F
Overcast
Feels like 87°F
82%
Humidity
4 mph
Wind Speed
About Weather in Mermentau
Mermentau is located in Louisiana (coordinates: 30.188007°N, 92.58381°W). Weather data is sourced from Open-Meteo, a free and open meteorological API using data from national weather services including NOAA.
All temperatures are displayed in Fahrenheit. Wind speed is in miles per hour.