Climate Insights for Mossel Bay

The climate in Mossel Bay is temperate. The average annual temperature is 18°C and approximately 408mm of precipitation falls per year. July is the wettest month, receiving around 63mm of rainfall. Mossel Bay is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: December, January, February. The coldest months are July, June, August, when temperatures can drop to 8°C.

Mossel Bay sees moderate temperature variation throughout the year, ranging from 8°C to 27°C. The warmest month is December, when average highs reach 27°C and the mean temperature sits around 22°C. July is the coolest month, with minimum temperatures around 8°C and an average of 13°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between November and December, with a 3°C shift in average temperatures.

Mossel Bay is a relatively dry area, receiving approximately 408mm of precipitation annually, which averages out to around 34mm per month. The wettest month is July, averaging 63mm of rainfall. February and March also tend to see above-average precipitation. The driest month is December, with just 10mm. That's 52mm less than July, 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.

Mossel Bay is relatively calm, with an average annual wind speed of 3km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

It is currently winter in Mossel Bay, which began on June 21, 2026. Mossel Bay is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in December at around 27°C, while the coldest stretch bottoms out in July near 8°C. Spring is next, beginning on September 23, 2026 — 52 days from now.

The best time to visit Mossel Bay is during January, February, March, April, May, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 29mm per month. By contrast, July can be quite cold with temperatures dropping to 8°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Mossel Bay 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.