Partly sunny skies and a slight chance of rain are in store for Long Island on Wednesday, the National Weather Service said.

The service's Upton office said high pressure sliding offshore and an incoming cold front will generate some clouds, but mostly it's another summerlike day with temperatures reaching the high 70s across most of Nassau and Suffolk counties with high humidity and a south wind blowing from 13 to 20 mph.

The threat of showers appears mostly from the late afternoon to the overnight hours, the service said.

News 12 Long Island meteorologist Rich Hoffman said daily high temperatures for the week, including the weekend, will continue to be in the mid to upper 70s, slightly above normal.

"The average typical high this time of year is 72," he said.

And even though there is a slight chance of rain Wednesday, Hoffman thinks the best shot at significant rain, one-half inch to 1 inch, is Sunday.

Hoffman said it's more likely rain on Wednesday will fall in Nassau, with a "spotty stray late afternoon and evening shower."

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Patchy fog is likely late Wednesday and into the overnight, with winds from the south-southwest from 10 to 15 mph and gusting up to 30 mph

On Thursday, another warm, humid day is likely, with daily highs in the mid to upper 70s.