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Australia weather

Weather in Byron Bay for September 2026

Your guide to Byron Bay weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Byron Bay at the beginning of September is 21.7 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 22.7 °C by the end of September.

    • Rain 🌧️

  • The climate of Byron Bay in September is notably wet, with an average of 15 rainy days, and a total of 119.1 mm of precipitation.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
15
Dry days
Average rainy days
15
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/14°
Temperatures
Average wind speed
21 km/h
Avg max wind
Average humidity
71 %
Avg humidity

Byron Bay Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Sunny
23°
2
Sunny
25°
3
Sunny
19°
4
Overcast
20°
5
Sunny
21°
6
Sunny
21°
7
Sunny
23°
8
Sunny
24°
9
Moderate or heavy rain shower
24°
10
Moderate or heavy rain shower
23°
11
Moderate rain at times
21°
12
Moderate or heavy rain shower
21°
13
Moderate or heavy rain shower
19°
14
Patchy rain possible
19°
15
Moderate rain at times
21°
16
Overcast
21°
17
Overcast
23°
18
Sunny
22°
19
Partly cloudy
25°
20
Sunny
23°
21
Sunny
22°
22
Patchy rain possible
22°
23
Sunny
21°
24
Overcast
22°
25
Cloudy
23°
26
Moderate or heavy rain shower
24°
27
Moderate or heavy rain shower
21°
28
Moderate or heavy rain shower
22°
29
Moderate rain at times
23°
30
Moderate rain
24°

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

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 23° /15° 1.9 mm 7
2 Sept. Sunny
Sunny
 25° /15° 0.6 mm 7
3 Sept. Sunny
Sunny
 19° /14° 0.1 mm 6
4 Sept. Overcast
Overcast
 20° /12° 0 mm 6
5 Sept. Sunny
Sunny
 21° /13° 0.1 mm 7
6 Sept. Sunny
Sunny
 21° /14° 2.8 mm 6
7 Sept. Sunny
Sunny
 23° /14° 0 mm 7
8 Sept. Sunny
Sunny
 24° /13° 0 mm 8
9 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 24° /15° 6.4 mm 6
10 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 23° /16° 9.8 mm 6
11 Sept. Moderate rain at times
Moderate rain at times
 21° /14° 0.9 mm 7
12 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 21° /13° 6.9 mm 6
13 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 19° /14° 3.9 mm 5
14 Sept. Patchy rain possible
Patchy rain possible
 19° /13° 1.8 mm 6
15 Sept. Moderate rain at times
Moderate rain at times
 21° /12° 1 mm 6
16 Sept. Overcast
Overcast
 21° /12° 0 mm 6
17 Sept. Overcast
Overcast
 23° /13° 0.1 mm 6
18 Sept. Sunny
Sunny
 22° /13° 0 mm 7
19 Sept. Partly cloudy
Partly cloudy
 25° /15° 0 mm 8
20 Sept. Sunny
Sunny
 23° /15° 4.7 mm 7
21 Sept. Sunny
Sunny
 22° /13° 0 mm 7
22 Sept. Patchy rain possible
Patchy rain possible
 22° /13° 0.1 mm 7
23 Sept. Sunny
Sunny
 21° /12° 1.2 mm 6
24 Sept. Overcast
Overcast
 22° /12° 0 mm 7
25 Sept. Cloudy
Cloudy
 23° /13° 0 mm 7
26 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 24° /14° 6.4 mm 7
27 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 21° /15° 26.8 mm 6
28 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 22° /15° 38.1 mm 6
29 Sept. Moderate rain at times
Moderate rain at times
 23° /16° 3 mm 7
30 Sept. Moderate rain
Moderate rain
 24° /16° 2.9 mm 7
Next
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.
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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 22° 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 119.1 mm is expected in Byron Bay during September, occurring over more than 15 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 21 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 💧
Typically, Byron Bay has 15 rainy days in September with a total of 119.1 mm of rainfall.

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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Location coordinates Where is Byron Bay?

Get accurate weather forecasts for Byron Bay, located at latitude -28.65 and longitude 153.612. Stay updated with localized weather information tailored for Byron Bay.

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