Shamijima Beach is the most developed beach in the Sakaide area and generally safe for families and swimming during the summer season. The sandy shoreline provides comfortable entry, and the beach is well-maintained with reasonable facilities. Lifeguard presence during peak summer months enhances safety, though confirming current services is recommended. The Seto Inland Sea here typically has calm conditions suitable for children, but always supervise young swimmers. Check weather and water conditions before visiting. The beach's popularity among local families indicates good safety standards and family-friendly amenities making it a reliable choice for beach outings.

The best time to visit Shamijima Beach is from late June through early September for swimming, with July and August offering peak beach weather and warmest water temperatures. The beach's famous Seto Ohashi Bridge views are spectacular at sunset year-round, making late afternoon visits particularly rewarding. For fewer crowds while maintaining good weather, visit on weekdays in June or September. Spring and autumn offer pleasant conditions for coastal walks and photography without swimming. The beach is officially open for swimming during summer months when facilities and services are fully operational.

Shamijima Beach is accessible from JR Sakaide Station by bus, taxi, or car, located approximately 15-25 minutes away depending on route and traffic. Local buses operate toward the Shamijima area, though schedules should be checked in advance as frequency may be limited. Taxis from the station provide direct, convenient access. Driving is straightforward via coastal roads with parking available near the beach. Bicycle rental could be an option for active visitors. The beach is the main coastal destination in the Sakaide–Utazu area, so locals can provide directions if needed.

Shamijima Beach area has some seasonal food vendors and cafes during summer months, though options may be limited outside peak season. Nearby areas offer restaurants serving local Kagawa specialties including sanuki udon and fresh seafood. Convenience stores in the vicinity provide snacks and basic supplies. For accommodation, Sakaide city center (15-20 minutes away) offers business hotels and some traditional lodging. Beachside accommodation is limited, so booking ahead is wise during summer. Takamatsu, about 30 minutes away, provides wider dining and hotel choices if Sakaide options are limited.

Shamijima Beach is famous for its spectacular views of the Seto Ohashi Bridge, one of Japan's most impressive engineering landmarks connecting Honshu and Shikoku. The beach offers a unique combination of natural sandy shoreline with dramatic modern architecture backdrop, making it highly photogenic and Instagram-worthy. Sunset views with the bridge silhouetted are particularly stunning. This combination of beach recreation and iconic landmark viewing sets Shamijima apart from typical Japanese beaches. The beach serves as the main legitimate beach destination in the Sakaide–Utazu coastal area, offering the best facilities and scenic appeal in this segment of Kagawa's coast.