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Knapps Lake Weather Forecast
| TODAY | TONIGHT | COLUMBUS DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
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| Chance of Rain | Chance of T-Storm | Chance of Rain | Mostly Clear | Mostly Sunny | Partly Cloudy | Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Chance of Showers | Chance of Showers |
| Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C | Lo: 60°FLo: 16°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 61°FHi: 16°C | Lo: 50°FLo: 10°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C |
| POP: 100% | POP: 100% | POP: 40% | POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 536 AM EDT Sun Oct 11 2026 
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Issued: 730 AM EDT Sun Oct 11 2026
Key Messages
1) Low pressure with remnants of Isaias approaches today and moves south of Long Island early Monday with overall minor impacts to the area.
2) Possible isolated minor coastal flooding for NY Harbor, western LI Sound and western South Shore Bays of Long Island during the Monday morning and Tuesday morning high tide cycles. Possible high surf for ocean beaches, especially for Long Island ocean beaches.
3) Chance of showers and possible thunderstorms Tuesday night into early Wednesday wi...