Wivenhoe Dam / Wivenhoe Lake

Moderate risk: Designated swimming area only

Snorkelling is only permitted within the marked designated swimming area at Logan's Inlet. Entering other parts of the lake is prohibited for safety reasons.

Moderate risk: Blue-green algae blooms

Blue-green algae (cyanobacteria) can bloom in warmer months, particularly in still conditions. Check Seqwater alerts before visiting and avoid water contact if blooms are present.

Low risk: Submerged timber and debris

As a dam reservoir, the lake contains submerged trees, stumps, and debris that may pose entanglement or injury risks, especially outside the designated area.

Low risk: Freshwater limited visibility

The lake is a freshwater reservoir with typically low visibility (1–3 m), especially after rainfall. Snorkellers should expect murky conditions compared to ocean sites.