There are usually quite a few people on the Helgoland Südstrand from October to April.
From November to April the water at Helgoland Südstrand is too cold to swim in.
From July to January Helgoland Südstrand has rainy season. This is something to keep in mind when planning your trip since it is quite possible that you may be unable to sunbathe.
Diving
Kiting
Surfing
Windsurfing