Holnis is a protected bay spot located on the Schlei estuary in northern Germany, characterized by extremely shallow, flat water with extensive sandbars and tidal mudflats. The coastline faces east toward protected waters, with modest fetch limited by the narrow bay configuration. Water conditions are consistently flat with minimal wave generation, making this a dedicated flat-water or light-wind spot. Wind reliability is poor at 24.1% with average winds of only 9.6 knots, requiring patience and selective session timing. The spot suits beginners and intermediates seeking calm, protected conditions with minimal wave hazard. Tidal fluctuations significantly affect water depth and usable space, necessitating awareness of tide schedules. The surrounding agricultural landscape and scattered residential development indicate moderate human activity. Best conditions occur with northerly winds providing side-shore access across the bay. This spot prioritizes flat-water progression and light-wind technique development over wave riding. Local knowledge of tidal patterns and shallow-water navigation is essential for safe, enjoyable sessions.