Gusty.... not by European (Irish) standards.
OK listen up!
WA....................Dec - March strong daily SSW consistent.
Sm to med kite
Head north of Perth. eg Geraldton or Lancilen
Outside of these months watch and wait for weather fronts and head south of Perth.
QLD...................pick a season pick a spot.
Tropical north. Daily SE 20knots+ Marchish - Octoberish.
Central coast Dailyish SE 20knots+ Marchish - Octoberish
and then Dailyish NE trades octorberish to marchish.
SE QLD coast. The SEs blow in spring and autumn head to just about any beach. Watch for local regulations and talk to the locals.
Good spot to head in SE are Gold Coast, Wellington point, Brighton Beach, Caloundra(local knowledge here is a must).
In the summer months the trades blow NE head to the same spots but instead of Caloundra head to NOOSA. Make sure you talk to the locals.
Caloundra and Noosa(river) are both estuary mouths. So watch your tides. They make for good light wind sailing with a 6knot tide. The current is very strong. You will loose your board. The locals will help(talk to them). But while body dragging bare this in mind. Sharks hunt at river mouths. You are bait on the end of a line.
Ok I'm outta time but if you have more when you are over there head down the coast NSW, VIC, SA.......... places like Byron, Merrimbula etc.