One of the great benefits of living on Maui is the FREE admission to the various community pools on the island. Even though we are fortunate to live near warm, beautiful ocean water where the swimming can be wonderful, the Maui county pools provide a great alternative option.
No need to worry about sand, currents, or waves that may knock your kids over. Plus, you can swim some laps, take swimming lessons, or join a water aerobics class. 
One of these community pools is located in Kihei, The Kihei Aquatic Center. I love coming here since it is within walking distance to my house and my 2 year-old daughter loves it too!
The Aquatic center has THREE pools: a keiki (kiddie) pool with a waterfall fountain, a training pool for lap swimming, water aerobics and recreational swimming for the kids, and a competition pool that is OLYMPIC size.
There are other pools are located in Wailuku, Kahului, Lahaina, and Pukalani, which are also free to the public, but vary in amenities.
You can also attend any pool regardless of which town you live in. Click here for more information.
On a hot summer day when you need some exercise or a place to take the family, but want to escape the heat, the community pools are a great place to go!
Its great that you have such nice pools there -- never thought much about pools in Hawaii as you have the ocean but pools can be nice too.