Predicted spring tides in the days following new moon (perigee) on 28 July 1965 were considerably exceeded on the west coast of the North Island. The surface weather maps showed high pressures over south-east Australia, a south-westerly airstream covering New Zealand, and a deep depression over the Chatham Islands: the whole system moving slowly eastwards. Before examining meteorological factQirs which may have contributed to the record high-water levels experienced in both Manukau and Kaipara Harbours on 31 July, consider the automatic tide gauge data.