Mild
Average highs are around 21°C, so days are mild rather than hot.
September verdict
Port St Johns, South Africa in September
Weather score56Good
Good for holiday weather
Average highs are around 21°C, so days are mild rather than hot. Sunshine averages 6.9h per day, enough for a balanced month. Rainfall averages 77mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
21°C
Rain
77mm
Sun
6.9h
Sea
22°C
Weather score
56
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 77mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 6.9h per day, enough for a balanced month.
Cool sea
Sea temperatures average 22°C, so the water can feel cool.
Map
Weather map
Compare Port St Johns, South Africa with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September21°C average high
September is cooler than the yearly average, which can make sightseeing feel gentler than in hotter months.
Warmest monthsJanuary to April and December
This stretch sets the upper range for average daytime heat.
Rain
September77mm average rain
September sits near Port St Johns' yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsMay to August
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September6.9 hours average sun
September is close to Port St Johns' usual sunshine level, with limited seasonal swing across the year.
Brightest monthsAll year
Sunshine stays consistently strong through the year.
Sea temperature
September22°C average sea
September is one of the coolest sea months, so the water may feel fresher than in peak months.
Warmest seaJanuary to April
Sea temperatures are usually near 25°C in this stretch, so swimming comfort is at its strongest.
Weather score
September56 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 June and December
These months have the strongest weather score in the monthly averages.
