Dads can look forward to a great day for cookouts or other outings — and it will hang around longer than usual because Sunday is the second longest day of the year and the last day of spring.

The 2016 summer solstice occurs at 6:34 p.m. Monday, marking the first day of astronomical summer and the longest day of the year in the northern hemisphere.

Sunday also will be a great day for the beach, with lots of sun, a nice cool breeze and water temperatures around 65 degrees.

It “will be a continuation of Saturday’s wonderful weather,” Bruce Avery, a News 12 Long Island meteorologist, said. He said Sunday will be part of “A Father’s Day weekend gift.”

Avery said to expect Sunday highs of 77, 79, 80 and 81 in East Hampton, Coram, Kings Park and Wantagh, respectively.

“The air is not all that humid, so it’s nearly perfect conditions,” Avery said.

Highs Sunday are expected to be in the upper 70s to low 80s, with lots of sun, agreed David Stark, a meteorologist with the National Weather Service in Upton.

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“It’s going to be a beautiful day,” Stark said. “It’ll be a little breezy in the afternoon with winds about 10 miles per hour. It’ll be an all-around nice day.”

There will be a few clouds at night, when temperatures will drop to the upper 50s to lower 60s.

But all looks good again for the start of summer Monday, which will usher in more days of pleasant weather and bright sunshine for the rest of the week, with the exception of Tuesday, which could dampen things a bit.

On Monday look for highs again in the upper 70s to low 80s and only a few clouds. Monday night will be slightly milder than on Sunday, with lows in the 60s.

“There’ll be increasing clouds — a cold front is coming in but it’s nothing significant,” Stark said.

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“There’s just a chance of a shower or thunderstorm Tuesday morning but by afternoon it’s outta here,” he said. “It’ll be quite warm with highs in the mid to upper 80s.”

The front will move offshore and then temperatures will drop to highs in the upper 70s to low 80s for Wednesday, Thursday and Friday, he said.

Stark said from Tuesday through Friday lows will be in the lower 60s.