Climate Overview
The climate in Honiara is hot. The average annual temperature is 25°C and approximately 4004mm of precipitation falls per year. Honiara receives a notable amount of rainfall throughout the year, including during its driest month. Honiara sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Honiara has relatively stable temperatures year-round, staying within a 3°C range. The warmest month is January, when average highs reach 27°C and the mean temperature sits around 25°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 3°C between highs and lows.
Precipitation
Honiara is a very wet location, receiving approximately 4004mm of precipitation annually, which averages out to around 334mm per month. The wettest month is December, averaging 454mm of rainfall. January and February also tend to see above-average precipitation. The driest month is June, with just 201mm. That's 253mm less than December, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.
Wind
Honiara is relatively calm, with an average annual wind speed of 9km/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 12km/h, though still comfortable for most outdoor activities. The calmest conditions occur in December, with average winds dropping to 7km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/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 11km/h in winter, 9km/h in spring, 8km/h in summer, 8km/h in autumn.
Seasons
1 day until Spring
It is currently winter in Honiara, which began on June 21, 2026. Honiara sits near the equator, so the traditional four-season cycle is less pronounced. Temperatures remain relatively stable year-round. The warmest period peaks in January at around 27°C, while the coldest stretch bottoms out in August near 24°C. Spring is next, beginning on September 23, 2026 (1 days from now).
Spring
Temperatures range from 24 to 27°C. Rainfall is heavy, totalling around 937mm across the season with a monthly average of 312mm. Winds are generally light, averaging 9km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 24 to 27°C. Rainfall is heavy, totalling around 1316mm across the season with a monthly average of 439mm. Winds are generally light, averaging 8km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.
Autumn
Temperatures range from 24 to 27°C. Rainfall is heavy, totalling around 1070mm across the season with a monthly average of 357mm. Winds are generally light, averaging 8km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 24 to 27°C. Rainfall is heavy, totalling around 681mm across the season with a monthly average of 227mm. Winds are generally light, averaging 11km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Honiara 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.
