Fehmarnsund Beach offers generally safe swimming conditions in the Fehmarn Sound, the strait between the island and mainland Germany. The location in the sound rather than open Baltic Sea typically means calmer waters with less wave action. The sandy bottom provides comfortable entry, though depth and currents can vary with tides and weather. Adult supervision of children is essential as no lifeguards are regularly present. Water quality is monitored and typically suitable for swimming. The proximity to the bridge means boat traffic passes through the sound, though swimming areas are separated from navigation channels. Check local conditions before entering the water.

Fehmarnsund Beach is accessible and enjoyable year-round, with each season offering different appeals. Summer months from June to August provide warmest weather for swimming and sunbathing, though this also means more visitors. The beach's unique feature—views of the Fehmarn Sound Bridge—is impressive in any season and particularly dramatic during sunsets. Spring and autumn offer pleasant temperatures for beach walks and photography with fewer crowds. The bridge is illuminated at night, creating striking evening views. Anytime visits work well because the beach serves both active beachgoers and those simply enjoying coastal scenery and the engineering landmark.