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Town of Riverhead, New YorkRiverhead, NY Weather Forecast
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Riverhead Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
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| Sunny | Mostly Clear | Mostly Sunny | Clear | Sunny | Clear | Sunny | Clear | Sunny | Mostly Clear | Mostly Sunny | Partly Cloudy |
| Hi: 55°FHi: 13°C | Lo: 40°FLo: 4°C | Hi: 59°FHi: 15°C | Lo: 45°FLo: 7°C | Hi: 59°FHi: 15°C | Lo: 49°FLo: 9°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 59°FHi: 15°C | Lo: 41°FLo: 5°C | Hi: 55°FHi: 13°C | Lo: 45°FLo: 7°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 546 AM EDT Fri Oct 23 2026 
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Issued: 730 AM EDT Fri Oct 23 2026
Key Messages
1) Dry conditions continue through much of next week.
2) Frost expected overnight from tonight through Sunday night in the interior. Frost Advisories issued for coastal CT and southern Westchester.
3) Minor coastal flooding possible in back bays of Nassau County NY for the morning high tide. For subsequent high tide cycles through early Saturday, additional minor coastal flooding possible for the same location.
Discussion
... .KEY MESSAGE 1... High pressure builds in from the north today...