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September weather forecast in Byron Bay

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Sun

Sunday

Mon

Monday

Tue

Tuesday

Wed

Wednesday

Thu

Thursday

Fri

Friday

Sat

Saturday

31 August, sun

	757 mmHg		77%
	4.5 m/s		+21

31 August, Sunday. day, 20°; night, 13°; clear

1 September, mon

	758 mmHg		77%
	4.5 m/s		+21

1 September, Monday. day, 20°; night, 13°; clear

2 September, tue

	758 mmHg		74%
	4.9 m/s		+21

2 September, Tuesday. day, 20°; night, 13°; rain

3 September, wed

	758 mmHg		73%
	5.1 m/s		+21

3 September, Wednesday. day, 20°; night, 13°; clear

4 September, thu

	758 mmHg		78%
	5 m/s		+21

4 September, Thursday. day, 20°; night, 13°; rain

5 September, fri

	757 mmHg		75%
	4.8 m/s		+21

5 September, Friday. day, 20°; night, 13°; rain

6 September, sat

	758 mmHg		74%
	5 m/s		+21

6 September, Saturday. day, 20°; night, 13°; clear

7 September, sun

	758 mmHg		73%
	4.8 m/s		+21

7 September, Sunday. day, 21°; night, 13°; clear

8 September, mon

	757 mmHg		72%
	4.6 m/s		+21

8 September, Monday. day, 20°; night, 13°; partly cloudy

9 September, tue

	757 mmHg		73%
	4.69 m/s		+21

9 September, Tuesday. day, 20°; night, 12°; clear

10 September, wed

	757 mmHg		74%
	5.2 m/s		+21

10 September, Wednesday. day, 20°; night, 12°; rain

11 September, thu

	758 mmHg		76%
	5 m/s		+22

11 September, Thursday. day, 20°; night, 13°; clear

12 September, fri

	758 mmHg		75%
	5 m/s		+22

12 September, Friday. day, 21°; night, 13°; clear

13 September, sat

	758 mmHg		75%
	4.6 m/s		+22

13 September, Saturday. day, 21°; night, 13°; clear

14 September, sun

	758 mmHg		73%
	4.8 m/s		+22

14 September, Sunday. day, 21°; night, 13°; clear

15 September, mon

	758 mmHg		74%
	4.69 m/s		+22

15 September, Monday. day, 21°; night, 13°; clear

16 September, tue

	757 mmHg		75%
	4.9 m/s		+22

16 September, Tuesday. day, 21°; night, 13°; clear

17 September, wed

	758 mmHg		73%
	4.69 m/s		+21

17 September, Wednesday. day, 21°; night, 13°; partly cloudy

18 September, thu

	758 mmHg		73%
	4.5 m/s		+21

18 September, Thursday. day, 21°; night, 14°; clear

19 September, fri

	757 mmHg		77%
	4.6 m/s		+22

19 September, Friday. day, 21°; night, 14°; clear

20 September, sat

	757 mmHg		76%
	4.9 m/s		+22

20 September, Saturday. day, 22°; night, 14°; rain

21 September, sun

	757 mmHg		78%
	5 m/s		+22

21 September, Sunday. day, 21°; night, 14°; partly cloudy

22 September, mon

	757 mmHg		78%
	5.3 m/s		+22

22 September, Monday. day, 21°; night, 14°; partly cloudy

23 September, tue

	757 mmHg		76%
	4.9 m/s		+22

23 September, Tuesday. day, 22°; night, 14°; clear

24 September, wed

	756 mmHg		78%
	4.9 m/s		+22

24 September, Wednesday. day, 22°; night, 15°; clear

25 September, thu

	756 mmHg		76%
	5.2 m/s		+22

25 September, Thursday. day, 22°; night, 15°; clear

26 September, fri

	757 mmHg		77%
	4.9 m/s		+22

26 September, Friday. day, 21°; night, 15°; rain

27 September, sat

	757 mmHg		76%
	4.9 m/s		+22

27 September, Saturday. day, 22°; night, 15°; partly cloudy

28 September, sun

	756 mmHg		77%
	5.2 m/s		+22

28 September, Sunday. day, 22°; night, 15°; rain

29 September, mon

	756 mmHg		77%
	5.4 m/s		+22

29 September, Monday. day, 22°; night, 15°; rain

30 September, tue

	757 mmHg		74%
	5 m/s		+22

30 September, Tuesday. day, 22°; night, 15°; rain

1 October, wed

	758 mmHg		74%
	5.1 m/s		+22

1 October, Wednesday. day, 22°; night, 14°; clear

2 October, thu

	757 mmHg		76%
	5 m/s		+22

2 October, Thursday. day, 22°; night, 15°; clear

3 October, fri

	757 mmHg		76%
	5.2 m/s		+22

3 October, Friday. day, 22°; night, 15°; clear

4 October, sat

	757 mmHg		75%
	4.9 m/s		+22

4 October, Saturday. day, 22°; night, 15°; clear

Average data for 10 years

Byron Bay September

16

sunny days

9

days with precipitation

2

cloudy days

16 sunny days; 9 days with precipitation; 2 cloudy days;

75

%

air humidity

3.3

m/s

WindS

57

mm of precipitation

(5% of annual average)

+22

°C

Water temperature

air humidity 75%; 57 millimeters of precipitation (5% of annual average); Wind southerly 3.3 Meters per second; Water temperature +22°

Weather graphs for September

TemperatureWater temperaturePrecipitation chance, %Humidity, %Wind, m/sPressure, mmHg

S

S

S

SW

SW

S

S

S

SW

SW

S

SW

S

S

SW

SW

S

S

S

S

S

S

SW

S

S

S

S

S

S

S

1

Average data for 10 years

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

Daytime temperature

Night-time temperature

Cities near you

Brisbane
Gold Coast
Bargara
Casino
Bundaberg
Ballina
Yamba
Sunshine Coast
Oakey

Cities with similar weather in September

Sydney
San Francisco
Vancouver
Genoa
Seattle
Lima
San Remo
San Sebastian
San Jose

The weather forecast for September 2025 is based on historical data from the past 10 years.

In September, the weather in Byron Bay is typically warm. Average daily high temperature in September is about 21 degrees above zero. On average, Byron Bay has 16 sunny, 9 rainy, and 5 partly cloudy days in September. The rains are usually moderate.

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