Do terrapins live in cold water?

Answer 1

All I could find specifically about the Diamondback terrapin turtle and its habitat temperature is that bigger specimens tend to be found in warmer areas than those found in colder areas. The only consistent information I found was that they live in brackish (or slightly salty) water along rivers or in ponds and lakes of the United States.

Answer 2

Terrapins can live in rather cold water, but they normally live in warm climates. In very cold weather, they may hibernate.