Sea Level at Ningaloo Reef, Western Australia

Ningaloo Reef’s sea level is referenced to the Australian Height Datum (AHD):

• Average: 2.1–2.9 ft (0.65–0.9 m) above AHD
• High tide: 6.2–9.2 ft (1.9–2.8 m) AHD
• Low tide: −3.3 to −1.0 ft (−1.0 to −0.3 m) AHD

Levels fluctuate with season, storms, and atmospheric pressure. The reef’s intertidal zones are highly dynamic.