A high-pressure system over Long Island has brought with it a picture-perfect weekend forecast.

Just a few clouds are expected to dot the sky at any given time, said David Stark, a meteorologist with the National Weather Service’s Upton bureau, but the sun will reign both Saturday and Sunday — good news for planning outdoor activities for Father’s Day. Temperatures on both days will be in the upper 70s to lower 80s, which is close to normal for this time of year, with the immediate coastal areas and the East End hitting the upper 70s.

“Overall, it looks like it’ll be a very nice and early summerlike weekend,” Stark said.

Matt Hammer, meteorologist with News 12 Long Island, summed up this weekend’s forecast in one word: “Perfect.”

“It doesn’t get much better than this time of year,” Hammer said.

The high-pressure air mass coming from southern Canada will keep it dry over the Island with minimal humidity and bring “typical mid-June weather” and “pleasant conditions,” Stark said.

“We’ll likely end up seeing more typical Long Island afternoons with a nice sea breeze influence,” Stark said.

Lows both Saturday night and Sunday night will be in the upper 50s to lower 60s, Stark said.

Because the warming of ocean temperatures tends to lag behind rising air temperatures, waters off Long Island are still in the lower 60s, Stark said.

“We’re still kind of early in the season,” Stark said. “We don’t see the water start to warm up until summer hits.”

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Winds will remain calm Saturday, at 5 mph in the morning and up to 10 mph in the afternoon. Sunday will be a bit more breezy, with winds whipping up to 15 to 20 mph, Stark said.

“Overall, this a pretty good beach weather weekend, especially today,” Stark said.

The “perfect” weather will stick around for the official start of summer, which rings in at 6:34 p.m. Monday, Hammer said, with temperatures in the lower to middle 80s with “lots of sun.”

The temperatures will stick in the upper 70s to lower 80s range the rest of the week, Hammer said, although they may cool down a bit toward the end of the week. As for precipitation, the forecast shows only a spot shower on Tuesday.