Wattamolla is a short 45 minute drive out of Sydney. Entry via car to the national park does incur a $10 flat rate however there is plenty of parking.
The walk down the lagoon and sea is a 10.minute walk through a trail but the walk is worth the wait. The lagoon is shallow and the water quite warm. If you want to have a real cool down the sea is freshing with small waves.
Wattamolla also offers a cliff that many people jump from into the deeper waters of the lagoon. You will.have to climb up the cliff for a jump if you are brave enough.