Around 1.7m is a minimum- pt Noarlunga tide predictions- but still sketchy in a few spots - if its really windy 30+ the tidal surge can add half a metre 1.9ish is probably safest
Living here and enjoying low / incoming tide sails don't have a fin that isn't a few cm shorter - those carbon MFC in the tri waves just blew apart at the smallest smack - great tip flex and stiffness at base & sailing but pissweak strength wise - theG10's are the only ones that seem ti handle the constant reef grinding - triggs and ueys the worst