Wellington weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Fair
Best time to visit: January – March
What is the weather like in Wellington in September?
In September, Wellington is cool: daytime highs average 13 °C, and nights cool down to about 10 °C. The sea averages 12.6 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 74 mm in total. It is often windy, with gusts of around 30 km/h. All in all, September is a so-so month for a holiday in Wellington.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 33 | 44 | 51 |
| Day | 12° | 13° | 14° |
| Night | 9° | 10° | 11° |
| Sea | 12° | 13° | 13° |
| Sun | 5 h | 6 h | 6 h |
| Rain days | 14 | 12 | 12 |
More details for September
- Daylight
- 11 h 45 min06:24 – 18:09
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 30 km/haverage daily peakAll months
- Cloud cover
- 58 %on averageAll months
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+12Pacific/Auckland
How the score comes together
- Temperatureweight 50 %46 %
- Sunshineweight 20 %42 %
- Few rainy daysweight 30 %43 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
- Windproof jacket
Wellington in September: quick answers
Is Wellington hot in September?
No. In September, Wellington is cool: daytime highs average 13 °C and nights drop to about 10 °C.
Can you swim in Wellington in September?
Only if you don't mind cold water: in September the sea averages just 12.6 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Wellington in September?
Rain is frequent, with about 12 rainy days and 74 mm in total.
Wellington month by month
The whole year in WellingtonAll destinations: New ZealandWhere to go in SeptemberSea temperature in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences