Climate Overview
The climate in Simberi Island is hot. The average annual temperature is 28°C and approximately 3912mm of precipitation falls per year. Simberi Island receives a notable amount of rainfall throughout the year, including during its driest month. Simberi Island sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Simberi Island has relatively stable temperatures year-round, staying within a 3°C range. The warmest month is December, when average highs reach 29°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
Simberi Island is a very wet location, receiving approximately 3912mm of precipitation annually, which averages out to around 326mm per month. The wettest month is July, averaging 482mm of rainfall. March and April also tend to see above-average precipitation. The driest month is September, with just 247mm. That's 235mm less than July, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.
Wind
Simberi Island is relatively calm, with an average annual wind speed of 4km/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 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in April, 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 2km/h gap between the calmest and windiest months.
Seasons
92 days until Spring
It is currently winter in Simberi Island, which began on June 21, 2026. Simberi Island sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in December at around 29°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 29°C. Rainfall is heavy, totalling around 850mm across the season with a monthly average of 283mm. Winds are generally light, averaging 4km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 27 to 29°C. Rainfall is heavy, totalling around 905mm across the season with a monthly average of 302mm. Winds are generally light, averaging 4km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 27 to 28°C. Rainfall is heavy, totalling around 1062mm across the season with a monthly average of 354mm. Winds are generally light, averaging 4km/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 1095mm across the season with a monthly average of 365mm. Winds are generally light, averaging 5km/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 Simberi 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.
