Secondary port · referenced to Onehunga
Cornwallis tide times
Cornwallis has no predictions of its own. These times are Onehunga's, shifted by the difference LINZ publishes for Cornwallis (−13m at high water, −17m at low water), with heights scaled by the published ratio of 0.86.
Predictions — not for navigation
These are LINZ's astronomical predictions. Actual water levels differ with barometric pressure, wind and storm surge — commonly by 0.3 m, and by a metre or more in a severe low. Do not use this site for navigation or for any decision where being wrong is dangerous. For navigation use the official LINZ tide tables and current charts. Heights are metres above chart datum, not above sea level, and times are New Zealand local time including daylight saving.
Friday 7 August 2026
Saturday 8 August 2026
Sunday 9 August 2026
Monday 10 August 2026
Tuesday 11 August 2026
Wednesday 12 August 2026
Thursday 13 August 2026
Source · LINZ tide predictions · Derived from Onehunga using LINZ secondary-port differences · Reviewed Aug 2026 · Method
Tidal levels at Cornwallis
| Level | Height above chart datum |
|---|---|
| Mean high water springs (MHWS) | 3.70 m |
| Mean high water neaps (MHWN) | 3.00 m |
| Mean sea level (MSL) | 2.20 m |
| Mean low water neaps (MLWN) | 1.30 m |
| Mean low water springs (MLWS) | 0.60 m |
Source · LINZ tide predictions · LINZ secondary ports table 2026–27 · Reviewed Aug 2026 · Method