Weather WorldSurprise Lake, WA Weather Forecast
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Surprise Lake Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
 |  | |  |  | | |  |  |  |  | |
| Hazy | Smoke | Smoke | Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Partly Cloudy | Chance of Showers | Chance of Showers | Chance of T-Storm | Chance of Showers |
| Lo: 60°FLo: 16°C | Hi: 86°FHi: 30°C | Lo: 60°FLo: 16°C | Hi: 89°FHi: 32°C | Lo: 56°FLo: 13°C | Hi: 86°FHi: 30°C Lo: 56°FLo: 13°C | Hi: 86°FHi: 30°C Lo: 56°FLo: 13°C | Lo: 60°FLo: 16°C | Hi: 86°FHi: 30°C | Lo: 56°FLo: 13°C | Hi: 76°FHi: 24°C | Hi: 76°FHi: 24°C Lo: 55°FLo: 13°C |
| POP: 20% | POP: 40% | POP: 50% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 255 PM PDT Sun Aug 16 2026 
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Surprise Lake Forecast Discussion
Issued: 350 PM PDT Sun Aug 16 2026
Key Messages
- Showers and thunderstorm chances continue on Sunday.
- Temperatures warm back into the mid 80s to mid 90s by Sunday.
- Drier air returns midweek.
Discussion
... Today: A low sitting off the PNW coast is bringing overall southwest flow to the area, increasing PWATs to 100 to 150 percent of normal (0.75 to 1 inch). A few weak impulses moving through the area combined with the added moisture and daytime heading has led to thunderstorms in the Cascades, northern m...