Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
Weather Guide
Mentawai Islands, Indonesia Average Monthly Weather
Weather score58Good annual avg
Best months: June, February, August
Across the year, average daytime temperatures are around 31°C, sunshine averages 6.6h per day, and rainfall totals about 3184mm. Sea temperatures average 29°C across the year.
Annual weather
Annual averages
Temp
31°C
Rain
3184mm
Annual total
Sun
6.6h
Sea
29°C
Weather score
58
Good avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 207mm, so showers are a real planning factor.
Some sun
Sunshine averages 6.9h per day, enough for a balanced month.
Warm sea
Sea temperatures average 29°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Mentawai Islands, Indonesia with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August31°C average high
August is close to Mentawai Islands' usual daytime heat, with little temperature swing across the year.
Warmest monthsAll year
Daytime heat stays consistently warm through the year.
Rain
August207mm average rain
August sits on the drier side of Mentawai Islands' year, which helps with sightseeing and transfers.
Driest monthsFebruary, May to June, and August
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August6.9 hours average sun
August is brighter than Mentawai Islands' yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsFebruary and April to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
August29°C average sea
August is part of a consistently warm sea-temperature pattern, so swimming comfort changes little through the year.
Warmest seaAll year
Sea temperatures stay warm enough for easy swimming through the year.
Weather score
August63 weather score
August scores above Mentawai Islands' yearly average, so the overall weather mix is stronger than most months.
Best weather monthsFebruary and May to August
These months have the strongest weather score in the monthly averages.