Stillinge Strand is generally safe for swimming, with calm waters typical of the Great Belt's inner shores. The long, sandy beach slopes gently, making it suitable for families and swimmers of varying abilities. Water quality is typically monitored and good, though checking current conditions via local notices is recommended. The beach's popularity means it's well-visited, providing some informal safety through numbers, though lifeguards may not be permanently stationed. Supervise children closely, particularly during busier periods. The west-facing position and sheltered location usually mean mild wave action and manageable swimming conditions throughout summer.

The ideal time to visit Stillinge Strand is June through August when Denmark experiences its warmest weather and the beach's summer services are fully operational. July offers peak season atmosphere with warmest water, though it's also busiest. The west-facing orientation makes this beach exceptional for sunset viewing, so late afternoon and evening visits during long summer days are particularly rewarding. Early June or late August provide good weather with fewer crowds. The beach is accessible year-round for walks, but swimming and services are seasonal. Weekdays are generally less crowded than summer weekends.