As winters go, this one has not been very “polar” so far, but things still were pretty chill at Penfield Beach as a small band of intrepid swimmers started the new year Friday with a splash at the first Penfield Beach Polar Plunge in support of Save the Children.

The air temperature was 38 degrees and water registered about 50 degrees, but Friday nonetheless was no day for basking on the beach.

Four swimmers, led by event coordinator Robin Myers, of Fairfield, stripped off their winter gear and, in swimsuits, stepped up to the water line. On Myers’ command, they splashed into Long Island Sound, shivered a few moments, gave a celebratory shout and fist pump, and sprinted back to shore.

For the past decade, the event — a fundraiser for the international-relief agency — had been organized under the auspices of the now-disbanded Mossman Triathlon Club at Compo Beach in Westport. The plunge’s new location this year recognizes the recent move of the Save the Children headquarters from Westport to Fairfield.