Lake St Lucia and the St Lucia Estuary form part of the iSimangaliso Wetland Park in KwaZulu-Natal, on South Africa's Elephant Coast, approximately 57 kilometres from Richards Bay. The water body is a large estuarine system where tidal waters connect to the Indian Ocean through a mouth that can shift in position depending on conditions. The estuary is characterised by calm, flat water that makes it accessible to paddlers of all skill levels, including complete beginners.

The most significant hazard on these waters is wildlife. The estuary supports a substantial population of hippopotamuses and Nile crocodiles, both of which are genuinely dangerous. Hippos have been observed charging motorised tour boats, and paddlers should expect close encounters. Bull sharks are also present in the estuary. Guided tours are strongly recommended, as experienced local guides understand how to navigate proximity to these animals safely. Paddlers should not venture out independently without thorough knowledge of the area.

The estuary mouth presents a separate set of challenges for those launching to sea. The sandbar at the mouth is subject to tidal variation, and launching is described as technically demanding. Timing relative to the tide is critical — launching at full low tide is inadvisable due to insufficient water depth and strong seaward suction. The launch site itself can shift, sometimes positioned just left of the mouth or further north toward Ingwe Beach. Conditions can include surf that is closely spaced and difficult to read, particularly in winter with northwesterly winds.

For estuary paddling, tours typically last around three hours and can begin any time between 6 am and 3 pm, with booking essential. The route takes paddlers around mangrove-covered islands where crocodiles bask and waterbirds fish. Fish eagles, African Golden Weavers, Yellow-Billed Storks, and a wide variety of other bird species are regularly observed. Hippos are frequently seen resting in the shallows or on grassy sandbanks.

Guided tours provide stable kayaks, paddles, and personal flotation devices. Participants are advised to bring a hat, sunglasses, sunscreen, a towel, and a change of clothes, along with a raincoat or jacket for cold or wet conditions. Participants must be at least 12 years of age and have a reasonable level of fitness. Pickup from St Lucia town accommodation is available through at least one operator.