So far so good for the first part of the first day of spring, which arrived Monday at 6:29 a.m.

As of just before 3 p.m. the temperature at Long Island MacArthur Airport was 51 degrees, with winds from the northwest of 14 mph, gusting to 22 mph.

That’s just about what forecasters had expected, with the National Weather Service’s Upton office calling for temperatures around 50 degrees — “seasonal temperatures, increasing clouds in the afternoon.”

Conditions will be on the breezy side, with winds from the north-northwest of 10 to 15 mph, said Rich Hoffman, News 12 Long Island meteorologist, Monday morning.

The overnight hours bring increasing clouds, lows of around 38 degrees, with a chance of showers into Tuesday morning, Hoffman said. The day looks to be heading up to the low 50s, he said.

Then, just as we settle in to spring vibes, along comes Wednesday, looking at highs in the low 30s, and Thursday, up to the high 30s. That’s “despite March sunshine,” the weather service said in its forecast discussion.

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Conditions warm up again after that, with the weather service even pointing to a call for the probability of above normal temperatures in the March 27 to April 2 range.

The Climate Prediction Center “is forecasting a 30-40% chance of above normal temps” for those days, the weather service said in a tweet. Normal highs for that time period in the region serviced by the Upton office — including Long Island — is an average 51 to 56 degrees, with lows 35 to 40.