Yes July is windy and at least one kite school operates at Kuta. SE trades can start early morning (~8AM) and usually by midday are at full strength, can be easily 18-20knts
Due to wind factor options for surfing are narrowed somewhat and you must be prepared to travel and explore well beyond Kuta. Traffic is not an issue so scooters are the norm for getting around if ur from oz. Japs and others rent vans with drivers/guides and travel as a large collective (no surprises there!)
Plenty of surf guides available but have never used one myself.