Thousands of people kicked off the new year with a freezing splash at Coney Island Beach. They ran straight into the Atlantic Ocean as part of the annual Polar Bear Plunge — all to support the local community.

Wrapped in robes, dressed in costumes or wearing swimsuits, participants packed the beach, hyping themselves up before racing into the water. Organizers say the plunge is about more than just braving the cold. It’s about tradition, community and giving back.

Long lines formed early as people checked in for the event. Some were taking part for the first time, while others said it’s their favorite way to start the year.

Organizers say about 4,000 people had already registered by midday, with that number expected to grow. A final count will be released later.

There was no required fee to participate, but plungers were strongly encouraged to donate at least $30. Every dollar raised goes back into the Coney Island community, supporting local nonprofits focused on youth programs, job training, education and ocean protection.

“This is everybody participating together with the community here,” said organizer Jared Lustgartan. “We’re partnering with local groups to raise money that goes right back into the neighborhood. The Polar Bear Club doesn’t keep any of that money.”

For many, the plunge is about mindset and fresh starts.

“Really, it’s about priming my mind for the harsh challenges of life,” said participant True, from New Jersey.

Another plunger - Vincent, from Sheepshead Bay - said the icy water helps reset the year ahead.

“We washed off all the negativity, and we’re starting fresh,” he said.

The event is hosted by the Coney Island Polar Bear Club, which has organized the New Year’s Day plunge for generations.

Organizers say the event has already raised more than $80,000, with donations still coming in as the day wraps up.