Yalong Bay is a protected bay located on Hainan Island's southeastern coast, facing south toward the South China Sea. The bay is characterized by a curved shoreline with a significant freshwater river mouth on the western side, creating a semi-enclosed water body typical of tropical bay environments. The extensive sandy beach and shallow lagoon areas make this an accessible location for water sports. Wind conditions are notably weak with an average of only 5.3 knots and very low reliability at 1.1%, making consistent kitesurfing sessions challenging. Wave heights average 0.67m, indicating light swell conditions. Easterly winds would provide optimal side-shore conditions for the south-facing beach. The shallow, protected waters and minimal wave energy suit beginner-level riders seeking calm conditions, though limited wind makes this spot unreliable for regular kitesurfing. The presence of river outflow, boat traffic, and shallow areas requires careful route planning. Best conditions occur during seasonal wind shifts when easterly sea breezes develop.