Tide Information for OTIData here is provided as is with no warranty ! Let us know if it's wrong!
The Cnut method of checking is not advised ;-)
The information is based on harmonic data obtained from the RAN with permission. (See also the Medsci wiki on Tides)
***The Heron Island resort operates on daylight saving time all year round.
The above 2 lines are VERY important - please read them again ;-)
Check with the OTI staff to confirm your findings here.
Predictions as PDF files :-
Reef clearance for MV Linckia II 2012 2013 2014 2015 2016 Reef clearance for MV Orcinus 2012 2013 2014 2015 2016 Tides for One Tree Island 2012 2013 2014 2015 2016
Online tide predictions:-
Wikipedia Tide page
Why are there 2 high tides each day?
John Holden's Maritime pages
AusTides 2013 (From Aust. Hydrographic Service - via the Chart & Map Shop in Sydney - where I usually get a copy)
Australian Hydrographic Service - http://www.hydro.gov.au/