Hey matie, just have lessons where you wish to spend the most time on your holiday.
In Exmouth you can have the best of both worlds, wind or no wind!
Snorkel Ningaloo Marine Park, Camp in Cape Range right on the beach, surf (when there is swell), walk trails etc...
*** If you don't have kidlets, make sure to travel out of Sept/Oct school holidays, which this year is the last week of Sept through until the first week of Oct.