Weather World
Grand Lagoon, LA Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Grand Lagoon Weather Forecast
| TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
 |  |  |  | | | |  | | | | |
| Chance of T-Storm | Mostly Clear | Mostly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Sunny | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Chance of T-Storm | Chance of T-Storm |
| Hi: 99°FHi: 37°C | Lo: 80°FLo: 27°C | Hi: 99°FHi: 37°C | Lo: 80°FLo: 27°C | Hi: 99°FHi: 37°C | Lo: 79°FLo: 26°C | Hi: 99°FHi: 37°C | Lo: 79°FLo: 26°C | Hi: 95°FHi: 35°C | Lo: 79°FLo: 26°C | Hi: 95°FHi: 35°C | Hi: 95°FHi: 35°C Lo: 75°FLo: 24°C |
| POP: 30% | POP: 20% | POP: 30% | POP: 50% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 535 AM CDT Mon Aug 17 2026 
Grand Lagoon Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Grand Lagoon Weather Map
Grand Lagoon Quick Facts
Grand Lagoon Forecast Discussion
Issued: 554 AM CDT Mon Aug 17 2026
Key Messages
Updated at 524 AM CDT Mon Aug 17 2026
- Hot temperatures are expected for much of the forecast. Highs mainly in the mid to upper 90s with heat index values climbing into the lower to mid 110s. Excessive Heat Warnings are in effect for today. Beyond today, Heat Advisories are anticipated. The impact of the afternoon highs will be exacerbated by the slightly higher than normal overnight lows.
Aviation
... (12Z TAFS) Issued at 524 AM CDT Mon Aug 17 2026
Outside ...