Forecast

WeatherUnderground 6-day Forecast: Riverhead, NY USA

Today	A mix of clouds and sun. High 42F. Winds W at 15 to 25 mph. Higher wind gusts possible.
Tonight	Some passing clouds. Cold. Low 24F. Winds WNW at 10 to 15 mph.
Tomorrow	Partly cloudy skies. High near 35F. Winds WNW at 5 to 10 mph.
Tomorrow night	A few clouds. Low near 25F. Winds light and variable.
Thursday	Sunshine along with some cloudy intervals. High 41F. Winds SE at 5 to 10 mph.
Thursday night	Partly cloudy during the evening followed by cloudy skies overnight. Low 32F. Winds light and variable.
Friday	Partly cloudy. High 48F. Winds light and variable.
Friday night	Mostly cloudy skies. Low 34F. Winds light and variable.
Saturday	Intervals of clouds and sunshine in the morning with more clouds for later in the day. Slight chance of a rain shower. High 47F. Winds SE at 5 to 10 mph.
Saturday night	Cloudy with showers. Low 38F. Winds S at 5 to 10 mph. Chance of rain 40%.
Sunday	Mostly cloudy skies. Slight chance of a rain shower. High 53F. Winds W at 10 to 15 mph.
Sunday night	Rain showers early with clearing later at night. Low 29F. Winds NW at 10 to 20 mph. Chance of rain 50%.

WeatherUnderground forecast for Riverhead, NY USA.
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National Weather Service Forecast for: Riverhead, NY
Issued by: National Weather Service New York/Upton, NY

Updated: 4:00 am EDT Mar 17, 2026

Riverhead, NY (ERH)

Today Mostly Sunny	Wednesday Mostly Sunny	Thursday Mostly Sunny	Friday Mostly Sunny	Saturday Chance Light Rain	Sunday Chance Light Rain	Monday Slight Chance Rain And Snow
Hi 41 °F	Hi 36 °F	Hi 43 °F	Hi 48 °F	Hi 48 °F	Hi 49 °F	Hi 43 °F

Tonight Chance Snow Showers then Partly Cloudy	Wednesday Night Partly Cloudy	Thursday Night Partly Cloudy	Friday Night Chance Light Rain	Saturday Night Chance Light Rain	Sunday Night Chance Light Rain	Monday Night Partly Cloudy
Lo 22 °F	Lo 22 °F	Lo 32 °F	Lo 36 °F	Lo 34 °F	Lo 31 °F	Lo 27 °F

Today	Mostly sunny, with a high near 41. Wind chill values as low as 23. West wind 15 to 21 mph, with gusts as high as 32 mph.
Tonight	A chance of snow showers between 8pm and 11pm. Partly cloudy, with a low around 22. Wind chill values as low as 15. West wind 7 to 14 mph, with gusts as high as 25 mph.
Wednesday	Mostly sunny, with a high near 36. Wind chill values as low as 15. West wind 5 to 8 mph.
Wednesday Night	Partly cloudy, with a low around 22. Wind chill values as low as 22. South wind 0 to 3 mph.
Thursday	Mostly sunny. High near 43, with temperatures falling to around 41 in the afternoon. Southeast wind 1 to 7 mph.
Thursday Night	Partly cloudy, with a low around 32.
Friday	Mostly sunny, with a high near 48.
Friday Night	A chance of rain after 8pm. Mostly cloudy, with a low around 36. Chance of precipitation is 30%.
Saturday	A chance of rain. Partly sunny, with a high near 48. Chance of precipitation is 30%.
Saturday Night	A chance of rain. Mostly cloudy, with a low around 34. Chance of precipitation is 30%.
Sunday	A chance of rain. Mostly cloudy, with a high near 49. Chance of precipitation is 30%.
Sunday Night	A chance of rain. Mostly cloudy, with a low around 31. Chance of precipitation is 30%.
Monday	A chance of rain before 8am, then a slight chance of rain and snow between 8am and 2pm. Partly sunny, with a high near 43. Chance of precipitation is 30%.
Monday Night	Partly cloudy, with a low around 27.

Forecast from NOAA-NWS for Riverhead, NY.

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