This service (updated daily) uses sea-level data streams from NIWA; regional councils (Northland Regional Council, Environment Waikato, Environment Canterbury); territorial authorities (Tasman District Council); port companies (Port Taranaki, Primeport-Timaru, Port Lyttelton); Antarctica NZ; and Bureau of Meteorology (Australia).

For any enquiries, contact sealevels@niwa.co.nz.