Forecast

WeatherUnderground 5-day Forecast: Riverhead, NY USA

	Tomorrow	Tuesday	Wednesday	Thursday	Friday

	AM Showers	PM Thunderstorms	AM Thunderstorms	Showers	AM Showers
	0.02 in	0.08 in	0.06 in	0.12 in	0.03 in

		Thunder expected	Thunder expected
	81°F	89°F	84°F	78°F	79°F
	UV: 6 High	UV: 9 Very High	UV: 8 Very High	UV: 4 Moderate	UV: 4 Moderate

Tonight	Tomorrow night	Tuesday night	Wednesday night	Thursday night	Friday night

Mostly Cloudy	Thunderstorms Early	Scattered Thunderstorms	Rain	Rain	Mostly Cloudy
	0.01 in	0.12 in	0.4 in	0.44 in

	Thunder expected	Thunder expected
72°F	73°F	71°F	69°F	67°F	67°F

Tonight	Partly cloudy early followed by cloudy skies overnight. Slight chance of a rain shower. Low 72F. Winds SSW at 5 to 10 mph.
Tomorrow	Showers in the morning, then cloudy in the afternoon. High 81F. Winds SSW at 10 to 15 mph. Chance of rain 40%.
Tomorrow night	Scattered thunderstorms in the evening, with fog developing late. Low 73F. Winds SSW at 10 to 15 mph. Chance of rain 30%.
Tuesday	Partly cloudy with afternoon showers or thunderstorms. Storms may contain strong gusty winds. High 89F. Winds SW at 10 to 15 mph. Chance of rain 40%.
Tuesday night	Scattered thunderstorms during the evening followed by occasional showers overnight. Low 71F. Winds SW at 5 to 10 mph. Chance of rain 60%.
Wednesday	Scattered thunderstorms in the morning, with mostly cloudy skies late. High 84F. Winds WSW at 5 to 10 mph. Chance of rain 40%.
Wednesday night	Rain showers in the evening will evolve into a more steady rain overnight. Low 69F. Winds light and variable. Chance of rain 70%. Rainfall near a half an inch.
Thursday	Overcast with rain showers at times. High 78F. Winds ESE at 5 to 10 mph. Chance of rain 60%.
Thursday night	Cloudy with periods of rain. Low 67F. Winds E at 5 to 10 mph. Chance of rain 70%. Rainfall around a half an inch.
Friday	Rain showers early with overcast skies later in the day. High 79F. Winds ENE at 5 to 10 mph. Chance of rain 50%.
Friday night	Mostly cloudy. Low 67F. Winds E at 5 to 10 mph.

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: 2:33 pm EDT Jul 06, 2025

Riverhead, NY (ERH)

	Monday Slight Chance Rain Showers	Tuesday Chance Rain Showers then Chance Showers And T-Storms	Wednesday Chance Rain Showers	Thursday Chance Rain Showers then Chance Showers And T-Storms	Friday Chance Rain Showers	Saturday Chance Rain Showers	Sunday Chance Rain Showers
	Hi 86 °F	Hi 89 °F	Hi 84 °F	Hi 82 °F	Hi 81 °F	Hi 81 °F	Hi 82 °F

Tonight Partly Cloudy then Patchy Fog	Monday Night Chance Showers And T-Storms	Tuesday Night Chance Showers And T-Storms	Wednesday Night Chance Showers And T-Storms	Thursday Night Chance Showers And T-Storms then Showers And T-Storms Likely	Friday Night Chance Showers And T-Storms	Saturday Night Chance Rain Showers
Lo 72 °F	Lo 72 °F	Lo 71 °F	Lo 69 °F	Lo 69 °F	Lo 68 °F	Lo 68 °F

Tonight	Patchy fog after 2am. Partly cloudy. Low around 72, with temperatures rising to around 74 overnight. Southwest wind 7 to 10 mph.
Monday	Patchy fog before 8am, then a slight chance of rain showers. Partly sunny. High near 86, with temperatures falling to around 83 in the afternoon. South wind 7 to 14 mph. Chance of precipitation is 20%.
Monday Night	A slight chance of rain showers before 8pm, then a chance of showers and thunderstorms. Mostly cloudy. Low around 72, with temperatures rising to around 74 overnight. South wind 6 to 12 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Tuesday	A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny. High near 89, with temperatures falling to around 86 in the afternoon. Southwest wind around 8 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Tuesday Night	A chance of showers and thunderstorms. Mostly cloudy. Low around 71, with temperatures rising to around 73 overnight. West wind 3 to 7 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
Wednesday	A chance of rain showers. Partly sunny, with a high near 84. Chance of precipitation is 30%.
Wednesday Night	A chance of rain showers before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Chance of precipitation is 50%.
Thursday	A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Cloudy, with a high near 82. Chance of precipitation is 50%.
Thursday Night	A chance of showers and thunderstorms before 8pm, then showers and thunderstorms likely. Cloudy, with a low around 69. Chance of precipitation is 60%.
Friday	A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Chance of precipitation is 50%.
Friday Night	A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 40%.
Saturday	A chance of rain showers. Mostly cloudy, with a high near 81. Chance of precipitation is 30%.
Saturday Night	A chance of rain showers. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
Sunday	A chance of rain showers. Mostly cloudy, with a high near 82.

Forecast from NOAA-NWS for Riverhead, NY.

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