Gunnamatta Bay
Gunnamatta Bay is on the bay side of Cronulla. It has a large netted cnclosure for swimming, and no waves. Its has a large deep water section, that you can swim laps etc. Although diving is a bad idea, the water is plenty deep enough to jump off the wharf, and there will be plenty of kids doing just that on a summer weekend. A coffee shop, beach, and park..
Cronulla Beach
There is no one Cronulla Beach, but rather South Cronulla and North Cronulla Beaches separated by a headland and connected by a waterfront walk. Both beaches have grassy park areas behind them suitable for picnics etc. South Cronulla is more protected, and tends not to have the stronger currents and waves of the more northern beaches.
Bass and Flinder Memorial
Bass and Flinders discovered the Port Hacking waterway around Cronulla. A memorial to them and and explanation of their journey is on the headland near the entrance to Port Hacking. Nice views across the river and ocean from here.
Eloura Beach and Wanda Beach
North Cronulla, Eloura and Wanda are all part of the same long stretch of sand. These beaches are further to walk, but often offer easier parking and less crowds. They also may be less sheltered than South Cronulla. The length of sand here is greater than any of the other Southern Sydney beaches.