Climate Overview
The climate in Biak is hot. The average annual temperature is 27°C and approximately 3186mm of precipitation falls per year. Biak receives a notable amount of rainfall throughout the year, including during its driest month. Biak sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Biak has relatively stable temperatures year-round, staying within a 2°C range. The warmest month is November, when average highs reach 28°C and the mean temperature sits around 28°C. July is the coolest month, with minimum temperatures around 26°C and an average of 27°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows.
Precipitation
Biak is a very wet location, receiving approximately 3186mm of precipitation annually, which averages out to around 265mm per month. The wettest month is June, averaging 375mm of rainfall. April and December also tend to see above-average precipitation. The driest month is October, with just 208mm. That's 167mm less than June, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.
Wind
Biak is relatively calm, with an average annual wind speed of 3km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.
Seasons
92 days until Spring
It is currently winter in Biak, which began on June 21, 2026. Biak sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in November at around 28°C, while the coldest stretch bottoms out in July near 26°C. Spring is next, beginning on September 23, 2026 — 92 days from now.
Spring
Temperatures range from 26 to 28°C. Rainfall is heavy, totalling around 685mm across the season with a monthly average of 228mm. Winds are generally light, averaging 3km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 26 to 28°C. Rainfall is heavy, totalling around 754mm across the season with a monthly average of 251mm. Winds are generally light, averaging 4km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 26 to 28°C. Rainfall is heavy, totalling around 842mm across the season with a monthly average of 281mm. Winds are generally light, averaging 3km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 26 to 28°C. Rainfall is heavy, totalling around 905mm across the season with a monthly average of 302mm. Winds are generally light, averaging 3km/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 Biak 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.
