Where abouts near Byron?
I'm down a few hrs south from there at Coffs (Harbour)
If it's like here, NE dominant seabreezes in summer, Sth busters in winter
See BOM averages for byron Lighthouse
www.bom.gov.au/climate/averages/tables/cw_058009.shtml See climate averages for wind for Coffs
http://www.bom.gov.au/weather/nsw/coffs_harbour/climate.shtml My sail range is 4.7 to 6.5 at 70odd kegs with 105L board, but i'm a beginner