We (Vicco family totally jack of winter) are heading on a road trip up the NSW south coast to Newcastle in the spring school holidays (late sept early oct) with extended stays in Merimbula, Jervis Bay and Newcastle. Taking all the toys, but particularly keen to score some good wavesailing.

I kinda know the main spots but don't know what conditions to expect i.e. typical spring wind and wave directions. Not too fusy about windstrength (if I can waterstart I can wavesail).

Any tips would be awesome.Thanks.

First stop check the spot guide here: nswwavesailing.org/spot-guide/

This roughly covers from Coffs Harbour to Jervis Bay. Depending on how early / late in spring you are travelling you can expect:

Light NE seabreezes (early in the season NE sea breezes tend to be stronger around Wollongong rather than further down around Gerroa)
Strong and gusty Westerlies (Not many places where you can wave sail in a Westerly - Gerroa can work as can Port Kembla and sometimes Narabeen / Long Reef)
Strong Southerlies (Plenty of great wave sailing both in Sydney as well as North and South of Sydney)
Ultra gusty NW (these mainly work for wave sailing around Anna Bay North of Newcastle)

Nobbies beach in Newcastle works really well in a NEer with a SE swell. NEers are usually pretty reliable in Sept / Oct