Climate Insights for Kiama

The climate in Kiama is warm and mild. The average annual temperature is 18°C and approximately 1267mm of precipitation falls per year. Kiama receives a notable amount of rainfall throughout the year, including during its driest month. Kiama 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 July, August, June, when temperatures can drop to 13°C.

Kiama has relatively stable temperatures year-round, staying within a 10°C range. February is the warmest month, though highs remain moderate at 23°C with a mean of 22°C. July 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. The sharpest temperature change occurs between April and May, with a 2°C shift in average temperatures.

Kiama is a fairly wet location, receiving approximately 1267mm of precipitation annually, which averages out to around 106mm per month. The wettest month is March, averaging 194mm of rainfall. June and February also tend to see above-average precipitation. The driest month is September, with just 64mm. That's 129mm 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.

Kiama 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 October, averaging 32km/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 4km/h between the calmest and windiest months.

It is currently autumn in Kiama, which began on March 20, 2026. Kiama 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 23°C, while the coldest stretch bottoms out in July near 13°C. Winter is next, beginning on June 21, 2026 — 88 days from now.

The best time to visit Kiama is during 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 76mm per month. By contrast, February can be uncomfortably hot with highs reaching 23°C, while July is the coldest period with lows dropping to 13°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 Kiama 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.