Climate Overview
The climate in Simon's Town is temperate. The average annual temperature is 17°C and approximately 571mm of precipitation falls per year. June is the wettest month, receiving around 112mm of rainfall. Simon's Town 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: January, February, December. The coldest months are August, July, September, when temperatures can drop to 12°C.
Temperature
Simon's Town has relatively stable temperatures year-round, staying within a 9°C range. January is the warmest month, though highs remain moderate at 21°C with a mean of 20°C. August is the coolest month, with minimum temperatures around 12°C and an average of 14°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows.
Precipitation
Simon's Town is a relatively dry area, receiving approximately 571mm of precipitation annually, which averages out to around 48mm per month. The wettest month is June, averaging 112mm of rainfall. July and August also tend to see above-average precipitation. The driest month is February, with just 14mm. That's 97mm less than June, 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.
Wind
Simon's Town is relatively calm, with an average annual wind speed of 6km/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 7km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 5km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.
Seasons
2 days until Winter
It is currently autumn in Simon's Town, which began on March 20, 2026. Simon's Town 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 January at around 21°C, while the coldest stretch bottoms out in August near 12°C. Winter is next, beginning on June 21, 2026 — 2 days from now.
Spring
Temperatures range from 13 to 18°C. Rainfall is relatively light, with around 129mm over the season and a monthly average of 43mm. Winds are generally light, averaging 6km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 17 to 21°C. Rainfall is relatively light, with around 60mm over the season and a monthly average of 20mm. Winds are generally light, averaging 7km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 15 to 20°C. Rainfall is relatively light, with around 111mm over the season and a monthly average of 37mm. Winds are generally light, averaging 5km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from 12 to 16°C. Precipitation is moderate at around 271mm for the season, averaging 90mm per month. Winds are generally light, averaging 5km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Simon's Town 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 18°C with modest rainfall averaging 31mm per month. By contrast, August can be quite cold with temperatures dropping to 12°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.
Monthly Climate Data
The table below shows monthly climate averages for Simon's Town 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.
