SOUTH BOSTON (CBS) – If there was ever a year to do the annual Polar Plunge in South Boston, this was it.

Hundreds of people lined up outside the L Street Bathhouse Tuesday morning to run into Boston Harbor on a warmer than usual New Year’s Day.

The air temperature was in the 50’s and the water temperature was in the low 40’s.

In fact, this was the warmest New Year’s Day since 1979 – 40 years ago.

Swimmers enter the water during the annual L Street Brownies New Year’s Day Plunge at the Curley Community Center in South Boston on January 1, 2019. (Photo credit JOSEPH PREZIOSO/AFP/Getty Images)

Last year, the air temperature was about zero degrees.