Shanhaiguan Beach generally provides safe swimming conditions during the main season, with calmer waters suitable for most visitors. The beach typically has lifeguard supervision during peak months. However, always observe local safety flags and warnings before entering the water. Currents and conditions can change, so exercise appropriate caution. The beach's romantic and scenic focus rather than water sports emphasis suggests relatively gentle conditions. Families and couples can usually swim comfortably in designated areas. Avoid swimming during adverse weather and always supervise children closely near the water.

To experience Shanhaiguan Beach with fewer crowds, visit during weekdays in May, June, or September. These shoulder season months offer pleasant weather while avoiding the peak July-August rush and Chinese national holidays. Early mornings and late afternoons throughout the season also see fewer visitors, which additionally provides the best light for enjoying the famous sunsets. Autumn weekdays can be particularly peaceful. Winter months are virtually empty but unsuitable for typical beach activities. For the most romantic and uncrowded sunset experience, aim for September when weather remains good but summer crowds have dispersed.