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STORM WATCH: Strong thunderstorms this evening will break the heat

90s this afternoon will be replaced by 60s with clouds and showers/storms on the way

Rich Hoffman

May 20, 2026, 12:06 PM

Updated

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Long Island Weather Alerts

Weather Alerts for Nassau & Suffolk Counties

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BE ALERT FOR STRONG TO POSSIBLE SEVERE THUNDERSTORMS THROUGH THIS EVENING

Long Island weather alerts

As we head through the afternoon, though, clouds will begin to increase and the atmosphere will turn more unsettled. It’s going to be a hot day, with temperatures ranging from the 70s along the shoreline to the 80s and lower 90s inland away from the water.

Long Island 12 hour planner forecast
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By this evening, scattered showers and thunderstorms are expected to develop. Some of these storms could pack a punch with brief heavy downpours and gusty winds, so you’ll want to stay weather aware if you have outdoor plans later today. The unsettled weather will continue through tonight and into early Thursday morning with additional scattered showers and thunderstorms around. Overnight lows will cool back into the 50s.

Thursday looks much cooler compared to today. We’ll see lots of clouds around along with scattered showers, especially during the morning hours. High temperatures will stay in the mid and upper 60s, making for a much more comfortable afternoon.

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By Friday, conditions improve a bit with partly sunny skies returning. There’s still a slight chance for a passing shower, but much of the day looks dry with highs in the mid-60s.

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As we head into the holiday weekend, the forecast stays somewhat unsettled. Saturday looks cloudy with periods of showers and temperatures in the upper 50s and lower 60s. Showers continue Saturday night with lows staying in the 50s. On Sunday, expect mostly cloudy skies with a few scattered showers around, although there could be some drier weather developing during the afternoon. Highs will be in the 60s. For Memorial Day on Monday, skies remain mostly cloudy with the chance for a passing shower and temperatures close to 70 degrees.

Long Island tonight forecast
Long Island tomorrow forecast
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