Yes — with management. The double coat that makes them famous is also the thing you have to think about from November onwards.
Highlands evolved on the west coast of Scotland, so the question is fair and it comes up in almost every enquiry. The short answer: they cope well across most of southern Australia, they need real management in the north, and everywhere they need shade and water you have actually thought about rather than assumed.
A Highland carries a double coat. The outer layer is long, coarse and oily, and its job is to shed rain — water runs off it rather than soaking through to the skin. Underneath sits a soft, dense undercoat that does the insulating.
In winter this combination is why Highlands need no shelter at all. Rain and wind that would have a British breed miserable barely register.
In summer they shed the undercoat, and a healthy Highland in January looks strikingly different to the same animal in July — lighter, sleeker, sometimes patchy while it is coming out. That shedding is normal and is not a sign anything is wrong. What is left is the outer coat, which is less insulating than it looks, and Highlands manage heat better than people expect once the undercoat is gone.
The real enemy is not dry heat. It is sustained heat combined with humidity, because that is where an animal struggles to shed heat at all.
Our country is 137 acres of grazing at Freshwater Creek, on the coast in Victoria. The summers are dry rather than humid, with a handful of genuinely hot days driven by northerly wind, usually broken in the afternoon by a change off the water. That is close to ideal for Highlands: the heat is real but it does not sit overnight, and the humidity that would trouble them is not there.
On a hot day the fold does what cattle everywhere do — they move to shade mid-morning, camp there through the worst of it, and come out to graze again in the evening. Provided the trough keeps up and there is somewhere decent to stand, they simply manage it. The harder parts of our year are the wet ones, not the hot ones, and mud through a coastal winter is a bigger practical problem than January ever is.
Sustained high humidity with no shade is where we would think carefully. Much of coastal Queensland and the Top End is a genuine challenge for the breed, not impossible but a different proposition, and it usually means more shade, more water, and accepting the animals will be sluggish through the wet season.
Tick country is the other consideration. Long coats and cattle ticks are a poor combination, and if you are in a tick area you need a program and you need to be honest with yourself about doing it.
Tell us where you are and what your place looks like, and we will give you an honest view rather than a sale. Sometimes the answer is that it would work with a shelterbelt and a bigger trough. Sometimes it is that a different breed would have an easier life.