Climate Insights for Wollongong

The climate in Wollongong is temperate. The average annual temperature is 18°C and approximately 1034mm of precipitation falls per year. Wollongong receives a notable amount of rainfall throughout the year, including during its driest month. Wollongong 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: January, February, December. The coldest months are July, August, June, when temperatures can drop to 11°C.

Wollongong sees moderate temperature variation throughout the year, ranging from 11°C to 25°C. January is the warmest month, though highs remain moderate at 25°C with a mean of 22°C. July is the coolest month, with minimum temperatures around 11°C and an average of 13°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows. The sharpest temperature change occurs between April and May, with a 3°C shift in average temperatures.

Wollongong is a moderately rainy area, receiving approximately 1034mm of precipitation annually, which averages out to around 86mm per month. The wettest month is March, averaging 157mm of rainfall. February and April also tend to see above-average precipitation. The driest month is August, with just 50mm. That's 107mm less than March, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Wollongong is moderately windy, with an average annual wind speed of 22km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 23km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in April, with average winds dropping to 20km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months.

It is currently autumn in Wollongong, which began on March 20, 2026. Wollongong 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 January at around 25°C, while the coldest stretch bottoms out in July near 11°C. Winter is next, beginning on June 21, 2026 — 87 days from now.

The best time to visit Wollongong is during January, May, September, 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 75mm per month. By contrast, July can be quite cold with temperatures dropping to 11°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Wollongong 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.