Byron Bay
September
Weather in Byron Bay for September 2025
Your guide to Byron Bay weather in September - trends and predictions
Until now, September 2025 in Byron Bay is slightly cooler than the historical average by -1.5 °C.
The forecast for the upcoming days in Byron Bay predicts a temperature of 23.6 °C, which is slightly above the historical average.
In general, the average temperature in Byron Bay at the beginning of September is 21.7 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 24.1 °C by the end of September.
The climate of Byron Bay in September is notably wet, with an average of 11 rainy days, and a total of 207.2 mm of precipitation.
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Temperatures
Rain 🌧️
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19
Dry days
11
Rainy days
0
Snow days
23°/14°
Temperatures
22 km/h
Avg max wind
70 %
Avg humidity
Byron Bay Weather September
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Temperatures trend during September in Byron Bay
See the weather trend as well as the moving average line
September weather in Byron Bay day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 23° /15° | 1.9 mm | 7 | |
| 2 Sept. | Sunny | 25° /15° | 0.6 mm | 7 | |
| 3 Sept. | Sunny | 19° /14° | 0.1 mm | 6 | |
| 4 Sept. |  Overcast | 20° /12° | 0 mm | 6 | |
| 5 Sept. | Sunny | 21° /13° | 0.1 mm | 7 | |
| 6 Sept. | Sunny | 21° /14° | 2.8 mm | 6 | |
| 7 Sept. | Sunny | 23° /14° | 0 mm | 7 | |
| 8 Sept. | Sunny | 24° /13° | 0 mm | 8 | |
| 9 Sept. |  Moderate or heavy rain shower | 24° /15° | 6.4 mm | 6 | |
| 10 Sept. | Moderate or heavy rain shower | 23° /16° | 9.8 mm | 6 | |
| 11 Sept. | Moderate rain at times | 21° /14° | 0.9 mm | 7 | |
| 12 Sept. | Moderate or heavy rain shower | 21° /13° | 6.9 mm | 6 | |
| 13 Sept. | Moderate or heavy rain shower | 19° /14° | 3.9 mm | 5 | |
| 14 Sept. |  Patchy rain possible | 19° /13° | 1.8 mm | 6 | |
| 15 Sept. | Moderate rain at times | 19° /11° | 2 mm | 5 | |
| 16 Sept. | Sunny | 22° /15° | 0 mm | 1.9 | |
| 17 Sept. | Patchy rain possible | 26° /16° | 0.1 mm | 1.9 | |
| 18 Sept. | Patchy rain possible | 21° /18° | 0.5 mm | 1.1 | |
| 19 Sept. | Patchy rain possible | 24° /18° | 0.3 mm | 1.9 | |
| 20 Sept. |  Moderate rain | 25° /18° | 5.4 mm | 1.4 | |
| 21 Sept. | Sunny | 23° /17° | 0 mm | 6 | |
| 22 Sept. | Sunny | 22° /15° | 0.1 mm | 6 | |
| 23 Sept. | Patchy rain possible | 21° /16° | 0.8 mm | 5 | |
| 24 Sept. | Patchy rain possible | 23° /15° | 1.1 mm | 5 | |
| 25 Sept. | Patchy rain possible | 20° /15° | 0.8 mm | 5 | |
| 26 Sept. | Sunny | 22° /14° | 0.1 mm | 6 | |
| 27 Sept. | Sunny | 24° /15° | 0 mm | 6 | |
| 28 Sept. | Sunny | 26° /16° | 0 mm | 7 | |
| 29 Sept. | Sunny | 31° /17° | 0 mm | 7 | |
| 30 Sept. | Moderate rain | 23° /16° | 5.8 mm | 6 | |
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Important Notice
Our weather forecast for Byron Bay in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Byron Bay forecast closer to your planned date for the most up-to-date weather information.
Change Month
Byron Bay in September - FAQ
What are the expected maximum and minimum temperatures in Byron Bay during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Byron Bay during September?
Significant rainfall exceeding 207.2 mm is expected in Byron Bay during September, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Byron Bay during September?
The average wind speed in Byron Bay during September is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Byron Bay
Explore the daily rainfall trends and prepare for Byron Bays September weather 💧
UV exposure in Byron Bay during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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