Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
December verdict
Very good for holiday weather
Average highs sit around 28°C, giving warm days by monthly-average standards. Sunshine averages 9.5h per day, so bright days are a strong part of the month. Rainfall averages 34mm, which is relatively low for holiday planning.
Monthly averages
Temp
28°C
Rain
34mm
Sun
9.5h
Sea
20°C
Weather score
75
Very good
Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
Drier
Rainfall averages 34mm, which is relatively low for holiday planning.
Bright
Sunshine averages 9.5h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 20°C, so the water can feel cool.
Map
Compare Swellendam, South Africa with nearby places by weather score, rain, sun, temperature, and swim conditions.
December28°C average high
December sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJanuary to March and December
This stretch sets the upper range for average daytime heat.
December34mm average rain
December is one of Swellendam's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJanuary to March, May to July, and September to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
December9.5 hours average sun
December is one of Swellendam's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsJanuary to February and November to December
This stretch has the strongest sunshine in the monthly averages.
December20°C average sea
December sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJanuary to March and December
Sea temperatures are usually near 21°C in this stretch, so swimming comfort is at its strongest.
December75 weather score
December is one of Swellendam's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJanuary to March and December
These months have the strongest weather score in the monthly averages.
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