- The average sea level at Ningaloo Reef is approximately 2.1 - 2.9 feet (0.65 - 0.9 metres) above the Australian Height Datum (AHD).
- Tidal ranges can vary but, typically, high tides can reach up to 6.2 - 9.2 feet (1.9 - 2.8 metres) AHD, while low tides can recede to around -3.3 to -1.0 feet (-1.0 to -0.3 metres) AHD.
- These values can fluctuate based on various factors such as seasonal changes, meteorological conditions, such as storms or atmospheric pressure systems