Outside of the main cities, our advice would be not to bother with dressy clothes.
However if you plan to visit city restaurants then you may feel more comfortable in smart casual wear.
They say you can even wear jeans to the opera or casinos without getting a second glance - although our experience is that people do make an effort in these venues, and men tend to wear smart suits although no bow ties.
Clothes in natural fibers will work better in the heat and it is worth popping in a lightweight sweater, cardigan or pashmina wrap for cooler weather or overly fierce air conditioning.
Travel light and buy your toiletries there.
Our advice for must haves include sunglasses and wear plenty of high factor sunscreen (we love the Riemann P20 range for 10 hour protection).
If you are planning to visit very hot areas then we would recommend that you pack a shirt with long sleeves and a higher neckline to prevent burning. A sunhat is also very useful in the intense sunshine and our packable one is just perfect for traveling.
A soft-sided rucksack is more practical than a hard suitcase if you plan to travel around - it's easier to fit into the small planes or transfer vehicles.
A lightweight day sack will come in handy to carry your sightseeing essentials.
When arriving in Australia make very sure you are not carrying food of any description in your suitcases or hand luggage. The search dogs have a very acute sense of smell and they will find it and you may be fined, which is not a great way to start your trip.
Clothing Tips for Women
Take comfortable footwear for all the walking (try Hotter shoes, comfy and stylish) and lovely flip flops or sandals for going out. We love the Lindsay Phillips Switch Flops range - using interchangeable shoe and flip-flop bases with snap-on decorations, you can change your look from day to evening in an instant whilst still packing light.
Jeans are always popular and will serve as a versatile base to your wardrobe. Wear them with cool layers such as a tank undershirt for the summer; December, January and February or warmer ones e.g. a long sleeved shirt and cardigan in the winter; June, July and August.
Clothing Tips for Men
The word is casual and calf-length shorts/ board shorts and casual shoes work brilliantly here.
Pack for the Weather
June, July and August is winter so pop a long-sleeved shirt or sweater in for the evenings as it is cooler at around 12/13C.
If you are planning to visit Melbourne then pop a lightweight raincoat in your bag – it tends to rain quite often.
On the Sunshine coast when the weather's hot (which it mostly is), it's beach wear all the way. And why not buy it there? There's a vast array of styles to choose from, so you're sure to find something that suits you and is a bit different too.
Regions of Australia
If you're going trekking in the wilderness of Tasmania on the World Heritage Overland Track, make sure you have comfortable, well-broken-in sturdy footwear, and pack light. Take a good head torch, and also take antihistamine cream in case you get a painful bite from the aggressive jack sweater ants. If you travel outside of the main trekking season (November, December, January, February, March and April) conditions will be particularly tough.
Long distance train travel is a relaxing way to see some remote areas and cover the vast distances of this great country. There are various classes of budget/comfort, but it's always handy to have a Swiss army knife and small roll of gaffer tape to fix rattling windows and the like, plus a cloth in case you need to clean the window. Also don't forget high SPF sun screen (some stops are very remote, very exposed and very hot), good insect/mosquito repellent and warm layers for the train - the air-con can be very strong.