Weather in Christchurch in August 2025
Average weather
Average temperature in Christchurch in August
Going from a maximum of +18°C during the day to a minimum of 0°C during the night, the temperature in August averages around +13°C.
The average maximum temperature goes down 6% by the end of the month, compared with the beginning of the month, from +17°C to +16°C.
Is Christchurch warm or cold in August?
Christchurch is typically mild in August.
Maximum temperatures go up compared to the previous month from +11°C to +12°C. The minimum temperature also goes up from +4°C to +5°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
August is one of the coolest months in Christchurch, here is the comparison with other months:
Water temperature in Christchurch in August
Water in Christchurch in August is Cold. It varies from +9°C to +10°C, with an average of +10°C. This is almost similar to the air temperature, which averages +12°C.
The water temperature in August is one of the coldest of the entire year:
Can you swim in Christchurch in August?
Climate in Christchurch in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +11°C | +12°C | +15°C | ||||
| Min. temperature | ||||||
| -5°C | -5°C | -4°C | ||||
| Max. temperature | ||||||
| +22°C | +22°C | +25°C | ||||
| Rainfall | ||||||
| 61 mm | 56 mm | 47 mm | ||||
| Wind | ||||||
| 2 m/s | 3 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +10°C | +10°C | +10°C | ||||
| Humidity | ||||||
| 81% | 79% | 75% | ||||
| Air pressure | ||||||
| 1011 HPa | 1011 HPa | 1010 HPa | ||||
| Sunny days | ||||||
| 6 | 5 | 5 | ||||
| Cloudy days | ||||||
| 10 | 10 | 10 | ||||
| Rainy days | ||||||
| 15 | 15 | 14 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as ok as in July. It’s getting warmer as August arrives. The average maximum temperature goes up from +11°C to +12°C during the day. As August arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 61 mm to 56 mm. It feels drier, as humidity decreases from 81% to 79%. Winds are stronger in comparison to July, going up from 2 m/s to 3 m/s on average. The days becoming less sunny, going from 6 sunny days in July to 5 in August.
September brings much the same weather, it remains ok.
Wind
The average wind speed is 3 m/s getting up to 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Christchurch is gradually decreasing during August, going from 7 m/s to 2 m/s over the course of the month.
Rain
How was the weather last August in Christchurch?
Climate Change over Years
The climate in Christchurch in August has not changed much over the last 43 years.
The average temperature was the lowest in 1992 (+15°C) and the highest in 2019 (+18°C). The driest year was 1988 with only 348 mm of rainfall, and the wettest year was 2021 with 963 mm.
FAQ
Is August a good time to visit Christchurch?
Can you sunbathe in Christchurch in August?
Can you swim in Christchurch in August?
Is Christchurch rainy in August?
Is it sunny in Christchurch in August?
Other cities in New Zealand
Monthly weather in Christchurch
Source of the data
For this page, we’ve looked at the typical weather in Christchurch, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.