William Villatoro, 6, of Port Jefferson, runs in excitement after...

William Villatoro, 6, of Port Jefferson, runs in excitement after catching a blueclaw crab in Patchogue on Sunday. Credit: James Carbone

Long Island can expect cool temperatures, cloudy skies and rainy conditions Mondaybefore a warmup later in the week and the return of partially sunny skies by the weekend, forecasters said.

After overnight showers Sunday into Monday, rain and strong winds will dominate, with temperatures in the 60s and low 70s during the day, according to the National Weather Service.

The Weather Service expects "widespread moderate coastal flooding" during high tide Monday morning on the South Shore of Nassau County. High surf through Monday night could additionally erode Atlantic Ocean beaches, according to Nelson Vaz of the Weather Service's New York City bureau.

The chance of rain and thunderstorms will continue Tuesday, when the temperature will rise to 82 degress, said Jay Engle, a meterologist with the National Weather Service's Upton bureau.

"Temperatures climb back above normal into the middle of the week," Engle said.

On Wednesday, skies are expected to remain cloudy, with a 30-percent chance of thunderstorms, a high near 82 degrees and a low of 71. Mostly cloudy skies with occasional sun is in the forecast Thursday, with a high near 80 and a low of 70.

Clearer skies are forecast Friday into the weekend, with partly sunny days and temperatures reaching the high 70s expected Friday, Saturday and Sunday.

Long Island is not expected to take a direct hit from Hurricane Florence, but the storm is likely to cause ocean swells, rip currents and beach erosion in the area, forecasters said.

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