September · Australia
Best time to visit Byron Bay in September Weather, crowds & prices
Weather in Byron Bay in September
Average temperature 20°C, 55 mm of rain, about 19 days with 6+ hours of sunshine and 73% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
7.6/10
Ranked #5 of 12 months
- Avg temp
- 20°C
- Rainfall
- 55 mm
- Humidity
- 73%
- Days with 6h+ sun
- 19
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Byron Bay scores 7.6/10 for beach and coastal travel - an above-average month (#5 of 12). Expect around 20°C, 55 mm of rain, and roughly 19 days with 6+ hours of sunshine this month.
Byron Bay's lighthouse, surf breaks and hinterland waterfalls anchor Australia's easternmost point.
September holds up well in Byron Bay — 5th best month
With 20°C (68°F) on average, September delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
Budget for roughly 55 mm of rain this month — a flexible day or two helps — with about 19 days with 6+ hours of sunshine and 11.8 hours of daylight to work around it.
That is 7.6/10 on the same scale — 5th of 12 months, versus 8.1/10 for the best month here.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
Expect mid-season pricing, and crowds are moderate.
Frequently asked
- What is the weather like in Byron Bay in September?
- In September, Byron Bay averages 20°C, 55 mm of rain, and about 19 days with 6+ hours of sunshine. Its climate-comfort score is 7.6/10.
- Is September a good time to visit Byron Bay?
- September earns a 7.6/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Byron Bay in September?
- Expect about 55 mm of rain in September. Average humidity is 73% and there are about 19 days with 6+ hours of sunshine.
Curated in Byron Bay
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Things to do in Byron Bay
Byron Bay, Australia. Live activities and tours from GetYourGuide, matched to this destination.