When my family from America came to visit us in Australia, I quickly planned a 3-week holiday with stopovers in Sydney, Adelaide, and Melbourne. We started the trip in Sydney. It was winter time and if you didn't know, winter here is between June to August. We had a 13-year-old and a 3-year-old with us so if you're looking to plan a Sydney trip suitable for the whole family, you've come to the right place!