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Foster Lake, WI Weather Forecast
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Foster Lake Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  |  |  |  |  | |  | | |  | |
| Chance of T-Storm | Chance of Showers | Mostly Cloudy | Partly Cloudy | Mostly Clear | Showers | Showers | Partly Sunny | Mostly Clear | Partly Cloudy | Chance of Showers | Partly Cloudy |
| Lo: 61°FLo: 16°C | Hi: 75°FHi: 24°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C Lo: 45°FLo: 7°C |
| POP: 50% | POP: 20% | POP: 70% | POP: 90% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 542 PM CDT Fri Sep 11 2026 
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Issued: 703 PM CDT Fri Sep 11 2026
Key Messages
- Chances for storms return late tonight into Saturday morning, mainly in north-central WI. Severe weather threat is very low, but brief gusty winds are possible.
- A round or two of heavy rain and storms is possible Monday into Tuesday. The severe weather threat is low.
- Gusty south-southwest winds will generate high waves along Lake Michigan this afternoon through Saturday morning, causing hazardous conditions to small craft and dangerous swimming conditions at Lake Michigan beaches.