National Weather Service Forecast for: Harvey LA
Issued by: National Weather Service New Orleans/Baton Rouge, LA
Updated: 1:25 am CDT Jun 30, 2026
 
Overnight

Overnight: Clear, with a low around 79. Calm wind.
Clear

 Tuesday

Tuesday: Sunny and hot, with a high near 95. Heat index values as high as 105. Calm wind becoming north around 5 mph.
Hot

 Tuesday
Night
Tuesday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 80. South wind around 5 mph becoming calm. Chance of precipitation is 20%.
Slight Chance
T-storms
 Wednesday

Wednesday: A chance of showers and thunderstorms before 4pm, then a chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 92. Heat index values as high as 105. Northwest wind 5 to 10 mph becoming east in the afternoon. Chance of precipitation is 50%.
Chance
T-storms
 Wednesday
Night
Wednesday Night: A 30 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 80. Southeast wind around 5 mph becoming calm in the evening.
Chance
T-storms then
Mostly Clear
 Thursday

Thursday: A slight chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 92. Light east wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 20%.
Slight Chance
T-storms
 Thursday
Night
Thursday Night: Mostly clear, with a low around 80. Southeast wind around 5 mph becoming calm in the evening.
Mostly Clear

 Friday

Friday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 93. Calm wind becoming southeast around 5 mph in the afternoon.
Sunny then
Chance
T-storms
 Friday
Night
Friday Night: Mostly clear, with a low around 79. South wind around 5 mph becoming calm in the evening.
Mostly Clear
Lo 79 °F Hi 95 °F Lo 80 °F Hi 92 °F Lo 80 °F Hi 92 °F Lo 80 °F Hi 93 °F Lo 79 °F

Heat Advisory
 

Overnight
 
 Clear, with a low around 79. Calm wind.
Tuesday
 
 Sunny and hot, with a high near 95. Heat index values as high as 105. Calm wind becoming north around 5 mph.
Tuesday Night
 
 A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 80. South wind around 5 mph becoming calm. Chance of precipitation is 20%.
Wednesday
 
 A chance of showers and thunderstorms before 4pm, then a chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 92. Heat index values as high as 105. Northwest wind 5 to 10 mph becoming east in the afternoon. Chance of precipitation is 50%.
Wednesday Night
 
 A 30 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 80. Southeast wind around 5 mph becoming calm in the evening.
Thursday
 
 A slight chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 92. Light east wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 20%.
Thursday Night
 
 Mostly clear, with a low around 80. Southeast wind around 5 mph becoming calm in the evening.
Friday
 
 A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 93. Calm wind becoming southeast around 5 mph in the afternoon.
Friday Night
 
 Mostly clear, with a low around 79. South wind around 5 mph becoming calm in the evening.
Independence Day
 
 A chance of showers and thunderstorms after 1pm. Sunny, with a high near 93. Calm wind becoming south around 5 mph in the afternoon.
Saturday Night
 
 Mostly clear, with a low around 79. Southwest wind around 5 mph becoming calm in the evening.
Sunday
 
 Showers and thunderstorms likely. Mostly sunny, with a high near 92. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
 
 A slight chance of showers and thunderstorms. Partly cloudy, with a low around 79. Southwest wind around 5 mph becoming calm in the evening.
Monday
 
 Showers and thunderstorms likely. Mostly sunny, with a high near 91. Calm wind becoming southwest around 5 mph in the afternoon.

 

Forecast from NOAA-NWS for Harvey LA.