Tidal streams can be very strong through the east entrance to Tory Channel / Kura te Au, reaching rates of 5 knots as indicated on chart NZ 6154
Tide rips form along the western approaches to the entrance and eddies form around Okukari Bay. Some cross-channel shear is present but is generally weak relative to normal channel flows.
Vessels approaching the entrance from Cook Strait against an east-going tidal stream will find that the stream at the entrance normally sets SSE onto the starboard bow. When abreast of West Head Light the stream sets onto the port bow. Care must be taken to account for the effect of the streams. Without local knowledge, low-powered vessels should not use the entrance at spring tides, whether entering or leaving Tory Channel / Kura te Au.
Times and direction of tidal streams.
- Tory Channel / Kura te Au tidal stream predictions (CSV)
- Tory Channel / Kura te Au tidal stream predictions (PDF)
- Tory Channel / Kura te Au spring tide diagrams (PDF 1.49MB)
- Tory Channel / Kura te Au neap tide diagrams (PDF 1.28MB)
Diagrams and animations
Diagrams showing the direction and rate of tidal streams at hourly intervals during average spring and neap tide conditions are also available below, along with animations of spring and neap tides.
The tidal stream predictions on this website are not official tide tables as specified in Maritime Rules Part 25 Nautical Charts and Publications (pursuant to Section 36 of the Maritime Transport Act 1994).
LINZ accepts no liability for any direct, indirect, consequential or incidental damages that result from any errors in the information, whether due to LINZ or a third party, or that arise from the use, or misuse, of the information available from this site.