Swimming at Bolshoy Atlesh requires caution due to the rocky coastline and cliff environment. The cove offers some protection, but depths can change quickly near rocks. Wear water shoes to protect against sharp surfaces. Snorkelers and divers should be comfortable in open water, as currents can occur around the headlands. Always check weather conditions before entering the water, and avoid swimming alone. There are no lifeguards on duty, so assess your abilities honestly and stay within your comfort zone.

The optimal visiting period runs from late May through September, when weather is warm and seas are calmer for boat access. July and August offer the warmest water temperatures, ideal for extended swimming and snorkeling sessions. Early summer (June) and early autumn (September) provide excellent conditions with fewer visitors. Clear, calm days are essential for appreciating the dramatic cliff scenery and underwater visibility. Spring and autumn can be beautiful for photography but water activities may be limited by cooler temperatures and rougher seas.