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Spectacular weather for Sunday, but a potential heat wave returns mid-week on Long Island

It's absolutely perfect Sunday weather for any plans. We have the latest boat and beach forecast & are tracking some big changes for the end of the week.

Alex Calamia

Jul 12, 2026, 7:41 AM

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It's a sunny Sunday with low humidity and light wind and rain is not expected for the next few days. However, the comfortable weather will be brief. We're tracking a potential heat wave starting Tuesday and the heat will last possibly through Friday. There's some uncertainty about when the heat will end with a storm system just to our north potentially bringing clouds and gloomy weather next weekend.

Sunny Sunday

It's a beautiful day with low humidity and high temperatures in the mid-80s. The wind is light from the east shifting to the southeast this afternoon at 5-10 mph. Tonight is comfortable and even "window opening weather!" Overnight lows are in the 60s with a calm wind and less humidity.

Twinning on Monday

Monday is nearly a repeat of today! We have plenty of sunshine in the forecast with highs in the mid 80s and low humidity. There could be a few more clouds on Monday than today, but they'll be thin so the sun will still shine through. The wind will pick up for Atlantic facing beaches in the afternoon from the ESE at 10-20 mph which will cool things for people heading to the ocean facing beaches.

Potential Heat Wave: Tuesday - Friday

Heat and humidity is back on Tuesday and it will linger through at least Friday. Rain is not expected until Friday afternoon and the chance for rain on Friday will be in the form of pop-up storms.

Close call next weekend

We're on the edge of a gloomy and cooler storm system to the north and major heat to the south. It's too early to make a call about the weather for next weekend so stay tuned for changes.

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Long Island 10 day forecast

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