The weekend brings one dry, mostly sunny day, with the other cloudier and set to introduce some widespread rain, forecasters say.

For outdoor activities, Saturday is your better bet — a “good beach day,” with highs in the mid-70s, and water temperatures ranging from 67 to 72 degrees, said Rich Hoffman, News 12 Long Island meteorologist.

Don’t be deceived, though, by Saturday’s early morning patchy fog and low stratus clouds, especially along the coast, said Tim Morrin, National Weather Service meteorologist based in Upton. That’s expected to burn off, making way for “flat-out sunny” skies by mid- to late- morning, he said.

Sunday, forecast to reach highs mostly in the upper 70s, sees effects from “a relatively slow-moving frontal zone,” expected to bring low clouds, patchy fog and a little more humidity for the morning hours — and even a possible hint of sunshine, Morrin said.

However, in mid- to late-afternoon, chances increase for that widespread rain to start moving in, continuing for the evening to overnight hours, he said.

With Long Island in moderate to severe drought, both he and Hoffman point to the need for that rainfall.

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With “a lot of moisture available,” there’s a chance Sunday into Monday for half an inch to an inch of rain — “a well-needed, long-overdue extended period of showers,” Morrin said.

It’s the kind of event, needed over and over again, he said, that can start chiseling away at the area’s precipitation deficit.