The best time for this walk is late autumn, winter and spring. Summer can be amazingly hot and should be avoided. Summer is also the wettest season of the year for the Sydney area which is a surprise to those from other regions of Australia.
The walk starts at Sydney but heads inland almost immediately. The best selection for the weather for the southern section is Pennant Hills - a northern suburb of Sydney which the track passes through. The northern end of the track is at Newcastle and the weather is quite different to the southern end with rainfall being spread over more of the year. Newcastle has significant rainfall extending from summer well into autumn and this should be considered when planning a trip.>