Climate Overview
The climate in Batam is hot. The average annual temperature is 27°C and approximately 2609mm of precipitation falls per year. Batam receives a notable amount of rainfall throughout the year, including during its driest month. Batam sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Batam has relatively stable temperatures year-round, staying within a 3°C range. The warmest month is May, when average highs reach 29°C and the mean temperature sits around 28°C. January 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
Batam is a very wet location, receiving approximately 2609mm of precipitation annually, which averages out to around 217mm per month. The wettest month is November, averaging 362mm of rainfall. May and December also tend to see above-average precipitation. The driest month is March, with just 127mm. That's 235mm less than November, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.
Wind
Batam 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 6km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 3km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans.
Seasons
92 days until Autumn
It is currently summer in Batam, which began on June 21, 2026. Batam sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in May at around 29°C, while the coldest stretch bottoms out in January near 26°C. Autumn is next, beginning on September 23, 2026 — 92 days from now.
Spring
Temperatures range from 27 to 29°C. Rainfall is heavy, totalling around 626mm across the season with a monthly average of 209mm. Winds are generally light, averaging 3km/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 583mm across the season with a monthly average of 194mm. 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 776mm across the season with a monthly average of 259mm. 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 625mm across the season with a monthly average of 208mm. 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 Batam 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.
