Yes. Be sure to freeze your chowder in airtight containers or heavy-duty freezer bags. Properly stored, it will be good for 4 to 6 months. When you’re ready to thaw your frozen New England clam chowder, remove it from the freezer and place it in your refrigerator overnight. Pour defrosted chowder into a pot over medium-high heat, cover the pot with a lid until it is brought to a slight boil. Be sure to stir regularly to prevent the cream from curdling.