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More summer heat on Long Island Wednesday with scattered evening storms

Reduced air quality lingers this evening with parts of Long Island approaching near 90-degree temperatures on Wednesday along with scattered gusty thunderstorms into Wednesday evening.

Matt Hammer

May 19, 2026, 6:05 PM

Updated

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Long Island Weather Alerts

Weather Alerts for Nassau & Suffolk Counties

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WARM AND MUGGY EVENING

It is a good idea to continue avoiding strenuous outdoor activities this evening because an air quality alert is still in effect. While there is a slight chance for a passing shower or brief downpour this evening, most of the rain misses Long Island to the north. Most of this evening will be partly cloudy, warm, breezy and muggy with temperatures gradually dropping through the 70s.

Overnight lows will be in the upper 60s to lower 70s with patchy fog into early Wednesday morning.

MORE SUMMER HEAT AND STORMS WEDNESDAY

Wednesday will be another day with a wide range of temperatures. It will be cooler - 70s - and breezy along the South Shore and East End, but much of Long Island will get into the 80s to potentially a few lower 90s, especially in northwestern Nassau County, on Wednesday afternoon before any scattered storms develop.

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A few scattered storms from after 3 p.m. through mid-evening can be strong to severe. The primary threats will be heavy rain, lightning, strong wind and hail. Please check the News 12 app for forecast updates through the scattered thunderstorm threat on Wednesday, and be prepared to slow travel from time to time as scattered rain and storms move through.

WEDNESDAY'S STORMS BREAK THE HEAT

The storms on Wednesday arrive ahead of a cold front that will drop temperatures back down into the 60s and lower 70s from Thursday through Memorial Day Weekend. The weather will remain unsettled, though, with scattered showers on Thursday and still a chance of a few showers on Friday.

MEMORIAL DAY WEEKEND

It is a shame this past weekend's weather couldn't have been swapped or continued for the upcoming holiday weekend! Unfortunately, it is not looking like a good weather weekend on Long Island. The wettest day is still likely to be Saturday with periods of light rain and high temperatures in the upper 50s to lower 60s.

Sunday, there is still a chance for some scattered showers, but not necessarily a washout, with highs around 67 degrees.

There is still some hope for Memorial Day Monday with temperatures around 70 degrees, but it still looks mostly cloudy with a spotty rain shower chance at this time. News 12 will continue to have important holiday weekend weather updates throughout the week for you on-air, on social media and the News 12 app.

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EXTENDED FORECAST

TONIGHT: Slight chance for a brief evening shower or downpour. Otherwise, partly cloudy, warm and muggy with lows in the 60s to near 70 degrees. Wind: breezy - southwest 10 to 20 mph.

WEDNESDAY: STORM WATCH -- Sun and clouds. Warm to hot and humid. Scattered thunderstorms develop after around 3 p.m. through mid-evening and can bring heavy rain, frequent lightning, strong wind and small hail. Highs around 86 degrees. Lows near 58 degrees with clouds and spotty showers overnight into Thursday morning.

THURSDAY: Mostly cloudy and cooler with scattered rain showers. Highs around 70 degrees. Lows near 52 degrees.

FRIDAY: Sun and clouds. A few showers possible. Highs around 66 degrees. Lows near 50 degrees.

SATURDAY: Cloudy with periods of rain. Highs around 63 degrees. Lows near 52 degrees.

SUNDAY: Mostly cloudy with scattered showers possible. Highs around 67 degrees. Lows near 54 degrees.

MONDAY: MEMORIAL DAY -- Mostly cloudy and while there is some hope for a decent day, there is also still the chance for some scattered rain showers at this time. Highs around 70 degrees. Lows near 56 degrees.

TUESDAY: Mostly cloudy with highs around 72 degrees. Lows near 59 degrees.

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