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Flat Lake Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY | MONDAY NIGHT | TUESDAY | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
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| Partly Cloudy | Chance of Showers | Chance of Showers | Mostly Cloudy | Mostly Cloudy | Mostly Cloudy | Mostly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Chance of Showers | Chance of Showers |
| Lo: 50°FLo: 10°C | Hi: 61°FHi: 16°C | Lo: 50°FLo: 10°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 61°FHi: 16°C Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C Lo: 41°FLo: 5°C | Hi: 65°FHi: 18°C Lo: 41°FLo: 5°C | Hi: 65°FHi: 18°C Lo: 41°FLo: 5°C | Hi: 69°FHi: 21°C Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C Lo: 49°FLo: 9°C |
| POP: 50% | POP: 50% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 640 PM CDT Thu Sep 17 2026 
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Issued: 632 PM CDT Thu Sep 17 2026
Key Messages
- Showers will spread across the region early Friday and linger into Saturday morning. The heaviest rainfall (30-50% of 1") will be south of a line from Brainerd to Sandstone to Hayward to Park Falls.
- Dangerous swimming conditions expected for the beaches of the Twin Ports Friday and Saturday then again Sunday and Monday afternoons and evening.
Discussion
... Issued at 220 PM CDT Thu Sep 17 2026
Dense cumulus field across the region this afternoon as low level moisture remains in place fr...