The Plunge San Diego

3115 Ocean Front Walk, San Diego, CA

The Plunge is San Diego's historic Belmont Park aquatic landmark, originally opened in 1925 and recently restored through a 2024-2025 renovation that returned this Mission Beach icon to active use. Today the renovated facility centers on a heated 25-yard saltwater pool inside an architecturally striking glass-walled pavilion, alongside a dedicated dry sauna and cold plunge designed for contrast therapy. Operated inside Fit Mission Beach, The Plunge offers single-day admission and Belmont Park add-on packages, making it accessible for tourists and locals alike. The pool is lap-friendly and family-suitable during open swim hours, while the sauna and cold plunge sit in the recovery zone for post-swim or standalone use. The combination of a working historic pool, ocean-front Mission Beach setting, and modern recovery amenities makes The Plunge a one-of-a-kind San Diego thermaculture destination.