Weather in Auckland in September 2025
Average weather
Average temperature in Auckland in September
Going from a maximum of +21°C during the day to a minimum of +8°C during the night, the temperature in September averages around +17°C.
The average maximum temperature goes down 15% by the end of the month, compared with the beginning of the month, from +17°C to +15°C.
Is Auckland warm or cold in September?
Auckland is typically mild in September.
Maximum temperatures go up compared to the previous month from +14°C to +16°C. The minimum temperature also goes up from +10°C to +11°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how September is compared to other months in Auckland:
Water temperature in Auckland in September
Water in Auckland in September is Cold. It varies from +14°C to +16°C, with an average of +15°C. This is almost similar to the air temperature, which averages +16°C.
The water temperature in September is one of the coldest of the entire year:
Can you swim in Auckland in September?
Climate in Auckland in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +14°C | +16°C | +17°C | ||||
| Min. temperature | ||||||
| +3°C | +2°C | +5°C | ||||
| Max. temperature | ||||||
| +21°C | +21°C | +23°C | ||||
| Rainfall | ||||||
| 121 mm | 112 mm | 97 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 5 m/s | ||||
| Avg. water temperature | ||||||
| +15°C | +15°C | +16°C | ||||
| Humidity | ||||||
| 82% | 80% | 78% | ||||
| Air pressure | ||||||
| 1014 HPa | 1015 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 3 | 2 | 2 | ||||
| Cloudy days | ||||||
| 6 | 7 | 8 | ||||
| Rainy days | ||||||
| 21 | 21 | 21 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as ok as in August. It’s getting warmer as September arrives. The average maximum temperature goes up from +14°C to +16°C during the day. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 121 mm to 112 mm. It feels drier, as humidity decreases from 82% to 80%. The average wind speed doesn’t change much during September, staying around 4 m/s. The days becoming less sunny, going from 3 sunny days in August to 2 in September.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 5 m/s getting up to 11 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Auckland is gradually increasing during September, going from 3 m/s to 8 m/s over the course of the month.
Rain
How was the weather last September in Auckland?
Climate Change over Years
The climate in Auckland in September has not changed much over the last 43 years.
The average temperature was the lowest in 1992 (+17°C) and the highest in 2022 (+20°C). The driest year was 1993 with only 852 mm of rainfall, and the wettest year was 2023 with 2571 mm.
FAQ
Is September a good time to visit Auckland?
Can you sunbathe in Auckland in September?
Can you swim in Auckland in September?
Is Auckland rainy in September?
Is it sunny in Auckland in September?
Other cities in New Zealand
Monthly weather in Auckland
Source of the data
For this page, we’ve looked at the typical weather in Auckland, 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.