Summer is nice and warm. High season a shorty is ok, a few weeks with just shorts is possible. Usually a wetsuit is always needed. Water max 22°C in summer, normally around 15°C. Winter gets cold, but a thick wetsuit, gloves, mask and shoes make kiting almost year-round possible. Air: summer between 20-30°C, spring and fall around 15°C.
Get to Fehmarn and take the first exit after crossing the bridge. Turn right and follow signs to Avendorf. Pass Avendorf and follow signs to Fehmarnsund. You will head to the water and once the street makes a 90° right turn, drive straight and enter Fehmarnsund. Drive all the way to the water and park for free directly behind the small dam.