Brisbane, where it lies

The climate of Brisbane, capital of Queensland, and lying on the east coast of Australia, is subtropical oceanic, with very mild and relatively dry winters, and hot and rainy summers.
Being in the Southern Hemisphere, like the rest of Australia it has reversed seasons in comparison with Europe or North America.
Here are the average temperatures.
Brisbane - Average temperatures
Min (°C)21201916131191013161819
Max (°C)292928262321202224272829
Min (°F)706866615552485055616466
Max (°F)848482797370687275818284

Because of its location, in winter the city is more sheltered from the cold, and also from wind and rain, than the southern cities (Perth, Melbourne, Sydney), but it is also sheltered from heatwaves from the desert, because in summer the eastern ocean currents prevail. However, in summer it can sometimes be affected by tropical cyclones, or at least their remains, which in any case are able to bring heavy rains.
Precipitation is quite abundant: in an average year, 1,200 millimetres (47 inches) of rain fall, of which more than 100 mm (4 in) per month from December to March, while the driest period is winter, together with early spring.
Here is the average precipitation.
Brisbane - Average precipitation

Winter, from June to August, is very mild: the average daytime temperatures are about 20 °C (68 °F). At night, at certain times it can be cold, so that the temperature can drop to around 3/5 °C (37/41 °F), but daytime temperatures remain mild. There are many sunny days, and the rains are quite rare.

Spring, in September and October, is pleasantly warm, but the rains start to increase.

Summer is long, going from November to March, and it's hot and muggy, but tempered by sea breezes, which regularly blow, especially in the afternoon. The weather is often good, but thunderstorms can break out quite often, sometimes accompanied by hail and wind gusts. In the years of La Niña, the rains may be particularly abundant, as happened in January 2011, when the Brisbane River flooded the city.
Every now and then, a tropical cyclone can reach the city, although this rarely happens, because cyclones usually pass to the north, beyond the Tropic. Sometimes, cyclones can pass at some distance, causing storm surges which can reach the coast.

Autumn, in April and May, is pleasantly warm, and it is quite rainy, although the rains are generally less intense than the summer thunderstorms. In May, sometimes at night it can get a little cold, with minimum temperatures below 10 °C (50 °F).


The amount of sunshine in Brisbane is good all year round, since there are several fine days in all seasons.
Brisbane - Sunshine

For swimming, the sea is quite warm from December to April, when the temperature is 24/26 °C (75/79 °F), while in winter, from July to September, it's cool, about 21 °C (70 °F), but after all it's not impossible. So, if you go in the Southern Hemisphere winter, maybe in July and August, on a fine day you can even try a swim in the sea.
The Goald Coast to the south and the Sunshine Coast to the north of the city are popular with surfers, while the city is located in a bay (the Moreton Bay) which is more sheltered from waves.
Here are the average sea temperatures.
Gold Coast - Sea temperature
Temp (°C)262626252422212121222325
Temp (°F)797979777572707070727377

When to go

Having a good climate, Brisbane can be visited all year round. Being the driest period, you can choose winter and early spring, from June to September. October is a bit more rainy, but is pleasantly warm, without excesses. Summer is hot and muggy, but generally the heat is bearable and it's a good period for swimming and sunbathing; sometimes, however, there can be severe thunderstorms, and even a cyclone can approach the city.