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Syosset Weather Forecast
| TONIGHT | COLUMBUS DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
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| Chance of T-Storm | Chance of Rain | Mostly Clear | Mostly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Mostly Sunny | Chance of Showers | Showers Likely | Showers Likely | Chance of Showers |
| Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 50°FLo: 10°C | Hi: 55°FHi: 13°C |
| POP: 100% | POP: 20% | POP: 30% | POP: 60% | POP: 60% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 336 PM EDT Sun Oct 11 2026 
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Issued: 148 AM EDT Mon Oct 12 2026
Key Messages
1) Low pressure developing along the front will pass south of Long Island late tonight into early Monday, with overall minor impacts.
2) Brief minor coastal flooding expected Monday morning and again on Tuesday for some spots.
3) A warm front passing to the north could bring shower, possibly thunderstorm to Long Island/SE CT Tuesday night, followed by a warm day on Wednesday.
4) Low pressure with a strong cold front may bring some wind impacts Friday into Saturday.
Discussion
... .KEY MES...