Sawajiri Bay is generally safe for swimming due to its sheltered bay location, with calm waters ideal for snorkeling. However, always check local conditions before entering the water, as currents can vary. The rocky seabed means water shoes are recommended. Snorkeling visibility is excellent, making it popular for underwater exploration. There are no lifeguards on duty, so swim at your own risk and never snorkel alone. Stay close to shore and be aware of boat traffic during summer months.

The best time to visit is during weekdays and shoulder seasons (late May-June and September) for fewer crowds, as indicated by its classification. Summer months (July-August) offer the warmest water temperatures for snorkeling but attract more visitors. Water clarity for snorkeling is typically best in calmer weather conditions. Avoid visiting during typhoon season (late August-October) when seas can be rough. Early morning visits provide the calmest conditions and best underwater visibility for snorkeling enthusiasts.

Kozushima is accessible by ferry from Tokyo's Takeshiba Terminal (approximately 3-4 hours by high-speed jet ferry or 8-10 hours by overnight ferry) or by small aircraft from Chofu Airport. Once on the island, Sawajiri Bay is reached by rental car, bicycle, or scooter, as public transportation is limited. The bay is located on the island's coastline and requires a short walk from parking areas. Check ferry schedules in advance as they vary seasonally and can be affected by weather conditions.

Sawajiri Bay Beach itself has no facilities, so visitors should bring their own food, water, and supplies. Accommodation is available in Kozushima's main village area, including small hotels, guesthouses, and minshuku (family-run inns). The island has limited dining options, primarily small restaurants and cafes serving local seafood. It's advisable to book accommodation well in advance, especially during peak summer season. Many visitors stay in the village and travel to various beaches around the island by rental transportation.

Sawajiri Bay is renowned for exceptional water clarity, making it one of the best snorkeling spots in the Izu Islands. The secluded bay location protects it from strong currents and waves, creating calm conditions ideal for observing marine life. The underwater landscape features interesting rock formations and diverse fish species typical of volcanic islands. Because it's less crowded than other beaches, the marine environment remains relatively pristine. The clear visibility often extends several meters, allowing snorkelers to explore the rich underwater ecosystem in comfort and safety.