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Long Island forecast: Mostly cloudy, highs in 60s

The weather forecast for Sunday, May 28, 2017.

The weather forecast for Sunday, May 28, 2017. Credit: Weather Underground

It won’t feel like summer on Sunday but it will be a fairly good day for outdoor Memorial Day weekend activities, with high temperatures in the 60s and mostly cloudy skies.

Jay Engle, a spokesman for the National Weather Service in Upton, said the weekend’s cloudy conditions at times have helped to keep temperatures cooler than normal for this time of year. He said the normal high at Islip is 71 and the low 54.

Lows will be around 55 overnight when showers are forecast.

“You’re talking a good 5 to 10 degrees below normal for the high” in most areas, Engle said. “We’re going to continue to run with clouds much of the day.”

According to News 12 Long Island meteorologist Matt Hammer, the high in Westbury will be 68; Merrick, 67; Coram and Babylon, 66; and Sag Harbor and New Suffolk, 60.

For those headed out to the ocean for the Bethpage Air Show at Jones Beach, it will be a little too cool for a swim. Hammer said the water temperature will range from 53 to 63 degrees but visibility boaters will be good.

A coastal flood advisory is in effect for the high tide cycle for late Sunday into early Monday for the shore back bays of Nassau County and New York City.

A damper on outdoor plans comes on Monday — the official observance of Memorial Day and the unofficial start of summer — with periods of morning rain and a thunderstorm in the forecast along with scattered showers in the afternoon.

Definitely bring along that umbrella, as the chance of rain is 90 percent.

Highs are expected to be near 64 and overnight lows around 55.

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