Climate Insights for Dunsborough

The climate in Dunsborough is temperate. The average annual temperature is 17°C and approximately 768mm of precipitation falls per year. July is the wettest month, receiving around 164mm of rainfall. Dunsborough 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, March, January. The coldest months are August, September, October, when temperatures can drop to 13°C.

Dunsborough has relatively stable temperatures year-round, staying within a 8°C range. February is the warmest month, though highs remain moderate at 21°C with a mean of 20°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 3°C between highs and lows.

Dunsborough is a relatively dry area, receiving approximately 768mm of precipitation annually, which averages out to around 64mm per month. The wettest month is July, averaging 164mm of rainfall. June and August also tend to see above-average precipitation. The driest month is December, with just 14mm. That's 150mm 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.

Dunsborough is relatively calm, with an average annual wind speed of 7km/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 8km/h, though still comfortable for most outdoor activities. The calmest conditions occur in April, with average winds dropping to 7km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.

It is currently winter in Dunsborough, which began on June 21, 2026. Dunsborough 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 21°C, while the coldest stretch bottoms out in August near 13°C. Spring is next, beginning on September 23, 2026 — 89 days from now.

The best time to visit Dunsborough 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 18°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 Dunsborough 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.