What's the weather like in Australia and New Zealand in April? Is it suitable for traveling?

In Australia, the temperature in Tasmania may be a little low. It's late autumn. The rest of the country is still warm, between short sleeves and thin coats. But it will be colder in New Zealand. As far as the South Island with the best natural scenery is concerned, it has entered early winter in April, and there will be snow on the top of the mountain. When you go, you need to take some slightly thicker coats, not too thick, unless you have a skiing plan, because the sunshine problem will not be too cold.