Apia 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: May – November
What is the weather like in Apia in September?
In September, Apia is hot: daytime highs average 28 °C, and even at night it stays warm at around 24 °C. The sea averages 28.0 °C – lovely and warm for swimming. The sun shines for around 7 hours a day. It is the rainy season: rain falls on about 23 days, totalling 161 mm. The air is often humid and muggy. All in all, September is a so-so month for a holiday in Apia.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 58 | 57 | 56 |
| Day | 28° | 28° | 28° |
| Night | 24° | 24° | 25° |
| Sea | 28° | 28° | 28° |
| Sun | 7 h | 7 h | 7 h |
| Rain days | 21 | 23 | 26 |
More details for September
- Daylight
- 12 h 0 min06:22 – 18:23
- UV index
- 12 · extremeclear sky, noon (estimate)All months
- Muggy days
- 29 daysdew point 18 °C or moreAll months
- Wind
- 25 km/haverage daily peakAll months
- Cloud cover
- 50 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+13Pacific/Apia
How the score comes together
- Temperatureweight 50 %88 %
- Sunshineweight 20 %68 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Apia in September: quick answers
Is Apia hot in September?
Yes. In September, Apia is hot: daytime highs average 28 °C and nights stay around 24 °C.
Can you swim in Apia in September?
Yes. In September the sea averages 28.0 °C – lovely and warm for swimming.
Does it rain much in Apia in September?
It rains often – on about 23 days, adding up to 161 mm.
Apia month by month
The whole year in ApiaAll destinations: SamoaWhere 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