Grab a heavy sweater or coat while heading out the next few days -- especially Sunday, when highs will reach only about 50 degrees across Long Island -- about 14 degrees below normal.

"It'll be quite chilly," said Faye Barthold, a meteorologist for the National Weather Service's Upton office. "It's cold out there now and it'll be cold out there all day today [Sunday]. Today, tonight, tomorrow and Friday will all be cooler than normal."

The morning will be sunny but clouds will increase through the afternoon when it will also become breezy.

"Overnight lows will be in the lower 30s, and as you go out to the pine barrens it'll be in the mid 20s when normally it's about 45," Barthold said.

"Monday will be kind of similar to today," Barthold said. "It'll be another cold day around 50 and sunny." Nighttime lows will be a warmer lower 40s.

"On Tuesday we rebound a bit, with highs in the mid-60s and it'll be mostly sunny," Barthold said. Lows at night will be in the upper 40s.

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Temperatures will continue to be in the mid-60s for the highs on Wednesday, when it will again be mostly sunny with lows at night around 50.

Thursday brings another day of highs around the mid-60s and more sun with temperatures at night in the mid to upper 40s.

Cooler weather returns for the start of the weekend on Friday, when highs will reach only the upper 50s, but it will be sunny. "It'll be a little cooler again at night," Barthold said, with temperatures in the lower to mid 40s.