Ports forecast is that of Cairns. The BOM is forecasting 10 to 15 knots Sat increasing to 20 to 25 knots Sunday. I would recommend the 12m as we have yet to really get any wind above 20 knots at Yorkies this year (can't say for Port) despite 25+ knots out on the reef.
It has been a very ordinary year for Cairns to say the least. I hope you it blows for you (us

)
Cheers