Forecasting Tides at Selected Sites

Specify a date and tide station and this routine will calculate the tides for that day.

Input Data

Date: yyyymmdd format.

Time Base
NZ Standard Time (NZST)
NZ Daylight Time (NZDT)
NZDT goes from the last Sunday in September
to the first Sunday in April.

Height Datum
Mean Sea Level
Chart Datum

Select a Station:

Tides for Port Levy:

25-Jul-2025 NZST(m above MSL)
High Tides Low Tides
04:03 0.863 10:14 -1.048
16:37 1.084 22:53 -0.905

Add -0.001 m for storm surge.
Storm surge is explained here

Acronyms of tidal parameters are explained here.
The effects of Moon's phases and apsides are explained here.



Please address enquiries to:
Derek Goring
Mulgor Consulting Ltd
Christchurch
New Zealand

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