The Lagoon is the heart of Airlie Beach — a free, lifeguard-patrolled, man-made saltwater pool right on the foreshore, surrounded by lawn, palms, and a covered barbecue area. It exists for a simple reason: from October to May, deadly Irukandji and box jellyfish make the open beach unsafe to swim, and a town that markets itself on tropical sun and water needed a guaranteed swim.
The pool is open from dawn until late evening, with a separate shallow children's section and a deeper lap area. Cafes and tour shops line the road behind it, so most people drift between sun lounger, espresso, and tour booking office all afternoon. At night the surrounding gardens are lit, and on weekends the lawn often fills with travellers cooking on the public barbecues.