Tuesday’s forecast is for increasing clouds and a chance of afternoon rain over parts of Long Island, the National Weather Service said.

Both Nassau and Suffolk counties could get rain, mainly after 2 p.m., with winds from the west-southwest, the service’s Upton office said.

News 12 Long Island meteorologist Rich Hoffman said the day will be mostly cloudy with a few late-day “spotty showers.”

Some scattered showers could develop after sundown, he said.

Hoffman said the average daily high for this time in May is 68 degrees; Tuesday’s high is forecast to be 65 with winds blowing at 5 to 15 mph.

Clouds continue to increase during the nighttime hours, with winds shifting to the west-northwest at 5 to 10 mph. Overnight lows are shy of 50 degrees.

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Wednesday opens with clouds and possibly morning showers, Hoffman said. Sunshine pushes its way into the act during the late afternoon, he said.

Daily highs are in the mid to upper 60s, with winds from the north shifting to the south-southwest at 5 to 10 mph.