Warm
Average highs sit around 30°C, giving warm days by monthly-average standards.
September verdict
Bolama, Guinea-Bissau in September
Weather score50Mixed
Mixed for holiday weather
Average highs sit around 30°C, giving warm days by monthly-average standards. Sunshine averages 5.7h per day, enough for a balanced month. Rainfall averages 413mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
30°C
Rain
413mm
Sun
5.7h
Sea
28°C
Weather score
50
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 413mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.7h per day, enough for a balanced month.
Warm sea
Sea temperatures average 28°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Bolama, Guinea-Bissau with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September30°C average high
September is on the cooler side of Bolama's year, useful if you prefer less intense daytime heat.
Warmest monthsFebruary to May
This stretch sets the upper range for average daytime heat.
Rain
September413mm average rain
September sits near Bolama's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to June and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5.7 hours average sun
September is below Bolama's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsJanuary to May and November
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September28°C average sea
September sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJune to July and September to November
Sea temperatures are usually near 28°C in this stretch, so swimming comfort is at its strongest.
Weather score
September50 weather score
September is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJanuary to April and November to December
These months have the strongest weather score in the monthly averages.