Climate Insights for Koolbaai

The climate in Koolbaai is hot. The average annual temperature is 26°C and approximately 750mm of precipitation falls per year. September is the wettest month, receiving around 127mm of rainfall. Koolbaai is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: September, August, October. The coldest months are February, March, January, when temperatures can drop to 24°C.

Koolbaai has relatively stable temperatures year-round, staying within a 4°C range. The warmest month is September, when average highs reach 28°C and the mean temperature sits around 28°C. February is the coolest month, with minimum temperatures around 24°C and an average of 25°C. Daily temperature variation is modest, with an average difference of 1°C between highs and lows.

Koolbaai is a relatively dry area, receiving approximately 750mm of precipitation annually, which averages out to around 63mm per month. The wettest month is September, averaging 127mm of rainfall. October and November also tend to see above-average precipitation. The driest month is March, with just 20mm. That's 108mm less than September, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Koolbaai is moderately windy, with an average annual wind speed of 29km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 33km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in October, with average winds dropping to 26km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 7km/h between the calmest and windiest months.

It is currently spring in Koolbaai, which began on March 20, 2026. Koolbaai is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in September at around 28°C, while the coldest stretch bottoms out in February near 24°C. Summer is next, beginning on June 21, 2026 — 90 days from now.

The best time to visit Koolbaai is during February, when the weather is most comfortable for travellers. During these months, average temperatures hover around 25°C with modest rainfall averaging 36mm per month. By contrast, September can be uncomfortably hot with temperatures reaching 28°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Koolbaai based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.