Summer is nice and warm. High season a short 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.
Take A28 and A31 to Emden. Exit at Emden-Nord onto B210 and Georgsheil turn left onto B72 direction Norden. In Norden towards Norddeich. Now you need to take a ferry for about 45min. When arriving on Norderney the beach is 300m to the West of the ferry harbour. Just next to the small boat ramp with the wooden stakes. Special rules for using your car during the season. Check the internet before you go.
Watch out for boat traffic and the current. Keep distance from the wooden stakes. Only ride here if the `Yachthafen` has no water and the winds are southerlies.