Shirahama Beach is very family-friendly with generally calm, shallow waters near shore that are safe for children during summer months when lifeguards are on duty. The designated swimming areas are protected, though parents should always supervise children as waves can vary. The beach has excellent facilities including restrooms, showers, and changing rooms. The wide sandy shore provides plenty of space for building sandcastles and beach play. However, be aware that certain areas have stronger waves suitable for surfing, so stick to marked swimming zones for the safest family experience.

Summer (July-August) is the most popular time when the beach offers full facilities, warm water, and lifeguard services, though it can be crowded, especially on weekends. Early summer (June) and early autumn (September) provide pleasant weather with fewer crowds and still-warm water temperatures. Winter visits offer beautiful scenery and peaceful walks, but swimming is generally too cold except for the hearty. The beach's white sand and turquoise water are photogenic year-round. For the best balance of good weather and manageable crowds, consider visiting on weekdays in June or September.