Climate Insights for Thursday Island

The climate in Thursday Island is hot. The average annual temperature is 27°C and approximately 1782mm of precipitation falls per year. January is the wettest month, receiving around 462mm of rainfall. Thursday Island 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: December, January, March. The coldest months are August, July, September, when temperatures can drop to 24°C.

Thursday Island has relatively stable temperatures year-round, staying within a 5°C range. The warmest month is December, when average highs reach 29°C and the mean temperature sits around 28°C. August is the coolest month, with minimum temperatures around 24°C and an average of 25°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows.

Thursday Island is a fairly wet location, receiving approximately 1782mm of precipitation annually, which averages out to around 148mm per month. The wettest month is January, averaging 462mm of rainfall. March and February also tend to see above-average precipitation. The driest month is August, with just 2mm. That's 460mm less than January, 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.

Thursday Island is moderately windy, with an average annual wind speed of 30km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is September, averaging 35km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in March, with average winds dropping to 24km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 11km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 34km/h in winter, 32km/h in spring, 26km/h in summer, 28km/h in autumn.

It is currently autumn in Thursday Island, which began on March 20, 2026. Thursday Island 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 December at around 29°C, while the coldest stretch bottoms out in August near 24°C. Winter is next, beginning on June 21, 2026 — 88 days from now.

The table below shows monthly climate averages for Thursday Island 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.