Climate Insights for Rottnest Island Airport

The climate in Rottnest Island Airport is warm and mild. The average annual temperature is 19°C and approximately 701mm of precipitation falls per year. June is the wettest month, receiving around 143mm of rainfall. Rottnest Island Airport 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 14°C.

Rottnest Island Airport has relatively stable temperatures year-round, staying within a 10°C range. 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 14°C and an average of 16°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows.

Rottnest Island Airport is a relatively dry area, receiving approximately 701mm of precipitation annually, which averages out to around 58mm per month. The wettest month is June, averaging 143mm of rainfall. July and August also tend to see above-average precipitation. The driest month is December, with just 5mm. That's 138mm less than June, 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.

Rottnest Island Airport is very windy, with an average annual wind speed of 34km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 37km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in April, with average winds dropping to 31km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 6km/h between the calmest and windiest months.

It is currently autumn in Rottnest Island Airport, which began on March 20, 2026. Rottnest Island Airport 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 14°C. Winter is next, beginning on June 21, 2026 — 88 days from now.

The best time to visit Rottnest Island Airport is during January, February, March, April, May, September, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 33mm per month. By contrast, August can be quite cold with temperatures dropping to 14°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 Rottnest Island Airport 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.