Weather WorldFlat Lake, IN Weather Forecast
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Flat Lake Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  |  | | | | | | |  | | |
| Chance of T-Storm | Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm |
| Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 60°FLo: 16°C |
| POP: 30% | POP: 20% | POP: 40% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 358 AM EDT Sat Aug 22 2026 
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Flat Lake Forecast Discussion
Issued: 609 AM EDT Sat Aug 22 2026
Key Messages
- Chances (30-50 percent)for showers and thunderstorms today. A few strong storms are possible east of Interstate 69 this afternoon and evening.
- Hazardous swimming conditions are expected on Lake MI beaches along Berrien Co, MI and La Porte County, IN this weekend. Dangerous waves and currents are expected. Monitor the beach forecast for updates.
- Dry conditions return Sunday night into Wednesday afternoon. Highs will be in the 70s and low 80s.
Discussion
... Issued at 607 AM EDT Sat Aug ...