Temperatures in the 90s may be in Friday’s forecast for Long Island, but don’t expect it to be that hot early next week, when a “massive dome of heat” is expected to form over the central United States.

“The hottest weather will remain stuck in the nation’s midsection next week,” said News 12 Long Island meteorologist Bill Korbel.

Of the upcoming seven days on Long Island, “Friday will likely be the hottest day . . . with highs around 90,” Korbel said.

After that, look for highs generally in the mid-80s, “with most days producing an afternoon sea breeze that will make” the South Shore and East End “a bit more comfortable,” he said.

Average highs for this period will be around 83, Korbel said, “so nothing out of the ordinary.”

The National Weather Service is indicating highs Friday will reach the low 90s, pulling back to the mid-to-upper 80s for the weekend and then to the mid-to-low 80s by next Tuesday and Wednesday. The service’s forecast goes out as far as seven days.

Still, for the central part of the country there’s an 80 percent to 90 percent chance for above normal temperatures from next Tuesday through Saturday, according to the Climate Prediction Center, which is under the umbrella of the National Oceanic and Atmospheric Administration.

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The area that includes Long Island is looking at a 50 percent to 60 percent chance for above average temperatures for that same time frame.

By late next week, the central United States and the upper Midwest may see temperatures ranging from 10 degrees to 20 degrees above average, according to The Washington Post.