Cool
Average highs are around 18°C, so pack for cooler days.
Weather Guide
Knysna, South Africa Average Monthly Weather
Weather score51Mixed annual avg
Best months: January, February, December
Across the year, average daytime temperatures are around 21°C, sunshine averages 7.4h per day, and rainfall totals about 888mm. Sea temperatures average 18°C across the year.
Annual weather
Annual averages
Temp
21°C
Rain
888mm
Annual total
Sun
7.4h
Sea
18°C
Weather score
51
Mixed avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 95mm, so some wet days are possible.
Some sun
Sunshine averages 6.8h per day, enough for a balanced month.
Cool sea
Sea temperatures average 16°C, so the water can feel cool.
Map
Weather map
Compare Knysna, South Africa with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August18°C average high
August has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsJanuary to March and December
This stretch sets the upper range for average daytime heat.
Rain
August95mm average rain
August is one of Knysna's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to July and September to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August6.8 hours average sun
August is below Knysna's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsJanuary to February and November to December
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
August16°C average sea
August is one of the coolest sea months, so the water may feel fresher than in peak months.
Warmest seaJanuary to March and December
Sea temperatures are usually near 21°C in this stretch, so swimming comfort is at its strongest.
Weather score
August39 weather score
August 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 March and December
These months have the strongest weather score in the monthly averages.
