
I have lived one house back from the beach @ largs bay (between semaphore and north haven for 20 yrs and so am spoilt ( average 30 -45 each summer )
as a rule I use a 4.7 -5.8 on bump and jump gear (too rough for sharp rails)
northern beaches are 5- 8 knots windier than southern in summer. southern beaches are windier in winter
we get northerlies twice a year sept - oct and late april to may
and north haven in behind the beakwater is the go
I no longer sail in winter (too infrequent fo my age range)
I am used to sharing with up to 20 kites and they dont bother me as they dont venture out too far and a good wind barometer (also makes me feel fast) ha
aslo one tack and jetty foils them and so you are on your pat malone
hope this helps