Auf der Schlei is a kitesurfing spot located on the Schlei, a narrow coastal lagoon in Schleswig-Holstein, Germany. This inland water body offers protected conditions with an east-facing shoreline and limited fetch. The spot features relatively shallow waters with scattered moored boats visible in satellite imagery, indicating mixed recreational and maritime use. Wind conditions are marginal, with an average of just 8.5 knots and low reliability at 16%, making this spot suitable primarily for lighter wind days. The side-shore wind direction from the north provides safe lateral conditions for kitesurfing. Best suited for beginners and intermediate riders seeking flat-water practice in controlled conditions rather than wave riding. Water temperature averages around 10.2°C, requiring proper thermal protection. Kiters should be aware of boat traffic, shallow water zones, and moored vessels before launching. This lagoon environment lacks significant swell and offers predictable, mellow conditions ideal for skill development rather than progression. Local regulations regarding boat interaction and designated riding zones should be observed.