Keep an eye on
www.seabreeze.com.au/weather/wa/perthWoodmans Point (Woodies) will be the closest spot to Coogee - refer to the Garden Island chart.
I would've thought your 8 and 11 would be ideal - 11 for under 22 knots, 8 for over?
We've had afternoons gusting 25-30knots the last few days - would you put an 8 or 9 up?