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O'Neill Lake, CA Weather Forecast
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O'Neill Lake Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | COLUMBUS DAY | MONDAY NIGHT | TUESDAY |
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| Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Partly Cloudy | Partly Cloudy | Chance of Showers | Chance of T-Storm | Showers | Showers Likely | Chance of Showers | Chance of Showers |
| Lo: 70°FLo: 21°C | Hi: 92°FHi: 33°C | Lo: 67°FLo: 19°C | Hi: 91°FHi: 33°C | Lo: 64°FLo: 18°C | Hi: 84°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 76°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 72°FHi: 22°C | Lo: 52°FLo: 11°C | Hi: 73°FHi: 23°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1135 AM PDT Wed Oct 07 2026 
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Issued: 457 PM PDT Wed Oct 7 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
...UPDATED AVIATION DISCUSSION...
KEY POINTS
1. Coastal flooding and beach erosion from high tides 6.5 to 7 ft and elevated surf at times is expected through next week.
2. Rain chances increase for Sunday through Tuesday across the area. Highest chances of rain are Sunday into Monday. We`re monitoring the potential for flash and urban flooding.
3. There is a p...