Forecast

WeatherUnderground 6-day Forecast: Riverhead, NY USA

Today	Tomorrow	Monday	Tuesday	Wednesday	Thursday

Sunny	Partly Cloudy	Mostly Sunny	Mostly Sunny	Mostly Cloudy	Few Showers
					0.03 in


86°F	84°F	78°F	75°F	75°F	77°F
UV: 9 Very High	UV: 9 Very High	UV: 9 Very High	UV: 9 Very High	UV: 7 High	UV: 7 High

Tonight	Tomorrow night	Monday night	Tuesday night	Wednesday night	Thursday night

Mostly Clear	Thunderstorms	Partly Cloudy	Partly Cloudy	Showers Late	Showers Early
	0.28 in			0.03 in	0.07 in

	Severe thunderstorms possible
60°F	62°F	55°F	57°F	60°F	65°F

Today	Abundant sunshine. High 86F. Winds WNW at 10 to 20 mph.
Tonight	Clear to partly cloudy. Low around 60F. Winds WSW at 5 to 10 mph.
Tomorrow	Partly cloudy skies. High 84F. Winds SSW at 10 to 20 mph.
Tomorrow night	Thunderstorms in the evening, then variable clouds overnight with still a chance of showers. Potential for severe thunderstorms. Low 62F. Winds SSW at 10 to 15 mph. Chance of rain 80%.
Monday	Mostly sunny skies. High 78F. Winds NW at 10 to 20 mph.
Monday night	A few clouds from time to time. Low near 55F. Winds NNW at 5 to 10 mph.
Tuesday	Mostly sunny skies. High near 75F. Winds WSW at 5 to 10 mph.
Tuesday night	A few clouds. Low 57F. Winds SSW at 5 to 10 mph.
Wednesday	Mainly cloudy. High near 75F. Winds SSE at 10 to 15 mph.
Wednesday night	Mostly cloudy during the evening. A few showers developing late. Low around 60F. Winds S at 5 to 10 mph. Chance of rain 30%.
Thursday	Cloudy with a few showers. High 77F. Winds S at 15 to 25 mph. Chance of rain 30%.
Thursday night	Rain showers early with mostly cloudy conditions late. Low around 65F. Winds SW 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: 7:54 am EDT Jun 13, 2026

Riverhead, NY (ERH)

Today Sunny	Sunday Mostly Sunny	Monday Chance Rain Showers then Mostly Sunny	Tuesday Mostly Sunny	Wednesday Mostly Sunny	Thursday Chance Showers And T-Storms	Juneteenth Slight Chance Rain Showers
Hi 88 °F	Hi 90 °F	Hi 84 °F	Hi 84 °F	Hi 84 °F	Hi 88 °F	Hi 92 °F

Tonight Mostly Clear	Sunday Night Showers And T-Storms Likely	Monday Night Partly Cloudy	Tuesday Night Partly Cloudy	Wednesday Night Partly Cloudy then Slight Chance Rain Showers	Thursday Night Chance Showers And T-Storms	Friday Night Slight Chance Rain Showers then Partly Cloudy
Lo 67 °F	Lo 66 °F	Lo 63 °F	Lo 64 °F	Lo 66 °F	Lo 71 °F	Lo 69 °F

Today	Sunny, with a high near 88. West wind around 10 mph.
Tonight	Mostly clear, with a low around 67. Southwest wind 1 to 7 mph.
Sunday	Mostly sunny. High near 90, with temperatures falling to around 85 in the afternoon. South wind 2 to 14 mph.
Sunday Night	Showers and thunderstorms likely after 8pm. Mostly cloudy, with a low around 66. Southwest wind 8 to 14 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Monday	A chance of rain showers before 8am. Mostly sunny, with a high near 84. West wind around 12 mph. Chance of precipitation is 40%.
Monday Night	Partly cloudy, with a low around 63.
Tuesday	Mostly sunny, with a high near 84.
Tuesday Night	Partly cloudy, with a low around 64.
Wednesday	Mostly sunny, with a high near 84.
Wednesday Night	A slight chance of rain showers after 2am. Partly cloudy, with a low around 66.
Thursday	A slight chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 40%.
Thursday Night	A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 40%.
Juneteenth	A slight chance of rain showers. Mostly sunny, with a high near 92.
Friday Night	A slight chance of rain showers before 8pm. Partly cloudy, with a low around 69.

Forecast from NOAA-NWS for Riverhead, NY.

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