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Town of Brookhaven, NYStony Brook, NY Weather Forecast
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Stony Brook Weather Forecast
| TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
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| Sunny | Partly Cloudy | Sunny | Mostly Clear | Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Partly Sunny | Mostly Cloudy | Partly Sunny | Mostly Cloudy |
| Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 41°FLo: 5°C | Hi: 59°FHi: 15°C | Lo: 41°FLo: 5°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 50°FLo: 10°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 231 AM EDT Thu Oct 29 2026 
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Issued: 322 AM EDT Thu Oct 29 2026
Key Messages
1) A dry cold frontal passage on Friday will be followed by another strong area of high pressure for the weekend.
Discussion
... .KEY MESSAGE 1... A shortwave trough riding over top of the upper ridge will send a cold front toward the area today, with the frontal passage Friday morning. Another area of strong high pressure builds into the area for the weekend with more autum-like airmass. System is moisture starved and any shower activity with the front is forecast to remain north of t...