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Deer Park Weather Forecast
| THIS AFTERNOON | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
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| Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Partly Cloudy | Sunny | Mostly Clear | Sunny | Mostly Clear | Mostly Sunny | Partly Cloudy |
| Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 59°FHi: 15°C | Lo: 39°FLo: 4°C | Hi: 61°FHi: 16°C | Lo: 50°FLo: 10°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C | Hi: 70°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 222 PM EDT Mon Oct 26 2026 
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Issued: 355 PM EDT Mon Oct 26 2026
Key Messages
1) Despite a dry cold frontal passage tonight, high pressure is expected to dominate the area through the week and possibly into the weekend.
2) Localized minor coastal flooding is possible across southern Nassau and southern Fairfield counties during the morning high tides Tuesday and Wednesday.
Discussion
... .KEY MESSAGE 1... A strong upper low tracking across central and eastern Canada will suppress the upper ridge to the north of our area. Upper ridging will then reestablish itself...