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Lake Forest Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
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| Chance of Showers | Chance of T-Storm | Mostly Clear | Chance of T-Storm | Mostly Clear | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm |
| Lo: 75°FLo: 24°C | Hi: 89°FHi: 32°C | Lo: 75°FLo: 24°C | Hi: 89°FHi: 32°C | Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C | Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C | Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C | Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C |
| POP: 40% | POP: 20% | POP: 40% | POP: 70% | POP: 20% | POP: 80% | POP: 20% | POP: 80% | POP: 20% | POP: 80% |
POP = Probability of Precipitation.
Weather Outlook Updated: 350 PM EDT Wed Sep 16 2026 
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Issued: 147 AM EDT Thu Sep 17 2026
Key Messages
Issued at 243 PM EDT Wed Sep 16 2026- Breezy to windy, especially at the coast, again Today. The risk of hazardous beach and boating conditions continues, including rough surf/seas and a high risk for life-threatening rip currents.
- A wet pattern of onshore moving showers and a few storms is forecast into late week. Repeated bands of rain and storms over saturated spots may lead to localized flooding in urban areas, especially later in the week.
- Seasonable temperatures are forecast int...