How much does it cost to go just swim in the pool once?

Hi Cassandra, like Scott posted, a guest pass for the day is $8/youth; $12/adult; $20/family. A guest pass allows access to our facility as a whole, not just the pool. https://www.ymcaofsouthernmaine.org/rates

$12 adult, $8 child, $20 family. https://www.ymcaofsouthernmaine.org/main/faq/