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Enjoy the sunshine as wet weather returns to Long Island for the end of the week

Sunshine fades to clouds and showers by the end of the week.

Rich Hoffman

Aug 25, 2026, 5:42 AM

Updated

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Islip Information

Islip Information

Islip, New York
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Mostly sunny skies are on tap for today, and overall it’s another pretty nice late-August day across Long Island. There is still a slight chance of an isolated shower developing late this afternoon into the evening, but most areas stay dry. High temperatures will reach the upper 70s and low 80s. The UV index will be on the high side, so don’t forget the sunscreen if you’re spending time outdoors. If you’re headed to the beaches, watch out for some rip currents along the South Shore and always swim near a lifeguard.

Long Island Today forecast

For tonight, we’re looking at partly cloudy skies and a nice, comfortable overnight. Low temperatures will generally fall into the 60s, with some cooler 50s possible around the Pine Barrens.

Long Island tonight forecast

Wednesday is looking beautiful, with mostly sunny skies and comfortable conditions. High temperatures will once again be in the upper 70s to low 80s.

Changes arrive Thursday as we track our next round of wet weather. We’ll start the day with some morning sunshine, but clouds will increase as we head through the afternoon. Rain showers develop later in the day, and there could even be a thunderstorm. High temperatures will be in the upper 70s. Showers and some thunderstorms continue Thursday night, with overnight lows in the 60s.

Long Island tomorrow forecast

Clouds and showers will linger for the first part of Friday before we start to see some late-day breaks of sunshine. High temperatures will be in the upper 70s. The good news is the weekend is looking very nice right now. Expect mostly sunny skies Saturday and Sunday, with high temperatures in the upper 70s and low 80s — some great late-summer weather to close out the weekend.

Long Island 10 day forecast

Beach and Boating Forecast

Long Island Rip Currents

Take a look at the new beach and surf forecast - plus a look at the tides

FUTURECAST

Expect cool conditions and partly cloudy skies during the overnight hours for some across the island.

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