Memorial Day weekend on Long Island will start off chilly and rainy but will slowly warm up through Monday, when the weather is expected to be sunny and in the 70s, according to the National Weather Service forecast.

Friday’s high temperature is 63 degrees. Parts of eastern Long Island may have "pokes of sun," but most of the region will be cloudy with a chance of some light rain during the afternoon, according to weather service meteorologist James Tomasini.

"Some clouds have moved in, which is probably going to lead to a mostly cloudy-to-overcast day," he said. "There is also a chance of some afternoon scattered showers around the area — not a washout by any means, like what we saw" on Thursday.

Saturday is expected to be slightly sunnier and warmer, with highs in the mid-60s and "just a slight chance" of afternoon showers, the meteorologist said.

"And then both Sunday and Monday we’re expecting dry and mostly sunny conditions with highs on Sunday in the upper 60s and highs on Monday in the lower 70s," he said.

Memorial Day is expected to be sunny and 71 degrees, but the oceans may still be too cold for safe swimming, Tomasini said, adding: "Water temperatures are still in the 50s. So, even though the air temperature will be in the lower 70s, the waters are still cold."

The weather service has also issued a rip current warning for Friday and Saturday, mostly for beaches on the South Shore. The National Ocean Service defines rip currents as "powerful, narrow channels of fast-moving water" that can sweep beachgoers away from the shore.

Tomasini said "there is a high risk of rip currents" on Friday and a moderate risk on Saturday. He said forecasters will have a clearer idea of the rip current risk for Memorial Day as Monday approaches.