Byron Bay weather in September
September in Byron Bay: nice, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Byron Bay · #378 of 897 destinations to visit in September · comfort 85/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Byron Bay in September
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Byron Bay climate normals — September
| Daytime high | 22°C / 71°F | 😎 nice |
|---|---|---|
| Nighttime low | 15°C / 59°F | |
| Rainfall | 52 mm / 2 in | 🌦 some rain |
| Rainy days | 6 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 13°C / 56°F | |
| Sunshine | 10.2 h/day | |
| Daylight | 11.9 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 36 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Byron Bay in September — FAQ
- Is September a good time to visit Byron Bay?
- September in Byron Bay: nice, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Byron Bay on SeasonMap's comfort score (85/100).
- What is the weather like in Byron Bay in September?
- In September, Byron Bay averages a daily high of 21.9°C and a low of 15.1°C, with about 51.6 mm of rain over roughly 6.2 rainy days.
- What is the air quality in Byron Bay in September?
- Byron Bay has a mean US Air Quality Index of about 36 in September.