Climate Insights for Bunbury

The climate in Bunbury is temperate. The average annual temperature is 18°C and approximately 727mm of precipitation falls per year. July is the wettest month, receiving around 160mm of rainfall. Bunbury is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: February, January, March. The coldest months are August, September, July, when temperatures can drop to 13°C.

Bunbury sees moderate temperature variation throughout the year, ranging from 13°C to 24°C. February is the warmest month, though highs remain moderate at 24°C with a mean of 22°C. August is the coolest month, with minimum temperatures around 13°C and an average of 15°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between November and December, with a 2°C shift in average temperatures.

Bunbury is a relatively dry area, receiving approximately 727mm of precipitation annually, which averages out to around 61mm per month. The wettest month is July, averaging 160mm of rainfall. June and August also tend to see above-average precipitation. The driest month is December, with just 9mm. That's 151mm less than July, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Bunbury is very windy, with an average annual wind speed of 31km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 35km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in April, with average winds dropping to 28km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 7km/h between the calmest and windiest months.

It is currently autumn in Bunbury, which began on March 20, 2026. Bunbury is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in February at around 24°C, while the coldest stretch bottoms out in August near 13°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Bunbury is during January, February, March, April, May, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 33mm per month. By contrast, August can be quite cold with temperatures dropping to 13°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Bunbury based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.