Hi Peter,
I live about 30 mins drive from Noosa; alas no windsurf hire on the water there. In fact the closest windsurf hire is probably Brisbane these days (surfconnect) so you'd need a car for that. There is SUP and surfboard hire on the main beach at Noosa though.
Adventure sports Noosa on Gympie Terrace have various watersports stuff-for hire they're by the river
www.kitesurfaustralia.com.au/pages/hire-rental-gear-noosa-sunshine-coastCheers,
Pete