Busselton weather in September

In September, Busselton sees average daytime highs of 16°C and overnight lows near 11°C, with 66 mm of rain across 10.5 wet days and about 11.8 hours of daylight. It is the 10th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 16°C through the month. The sky is clear or mostly clear about 20% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 18 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Busselton's 12th-clearest and 5th-windiest month. For the whole year in context, see Busselton's year-round climate.

Daytime high
16°
10th warmest
Overnight low
11°
2nd coldest
Rainfall
66 mm
10.5 wet days
Daylight
11 h 48 min
6:19 AM – 6:07 PM
Cloud cover
59%
12th clearest
Wind
18 km/h
5th windiest
Solar energy
4.16 kWh/m²
Travel score
5.1
out of 10

Busselton is city in the South West region of Western Australia.

Air quality
Good
PM2.5 8.1 µg/m³ · 2016
Founded
1832

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 16°C through the month.

A typical September day in Busselton reaches about 16°C in the afternoon and slips back to 11°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 19°C. Set against its neighbours, September runs on par with August and about 2°C cooler than October.

10°15°20°151015202530
Avg high (°C)Avg low (°C)
11611
21611
31611
41611
51611
61611
71611
81611
91611
101611
111611
121611
131611
141611
151611
161611
171611
181711
191711
201711
211711
221711
231711
241711
251711
261711
271711
281711
291711
301711

Busselton weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 16°111.4148.7
Feb26° / 17°101.413.38.6
Mar24° / 16°222.912.38.3
Apr21° / 15°294.511.27.5
May19° / 13°829.110.36.2
Jun17° / 12°11312.39.85.0
Jul16° / 11°12514.3104.5
Aug16° / 11°9712.510.84.7
Sep16° / 11°6610.511.85.1
Oct19° / 12°335.812.86.6
Nov21° / 13°274.613.77.5
Dec24° / 15°112.214.28.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 26% of September, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14852
24852
34852
44753
54654
64555
74555
84555
94555
104555
114555
124555
134654
144654
154654
164654
174654
184654
194654
204654
214555
224555
234654
244555
254555
264555
274555
284555
294654
304654

Chance of precipitation in September

Any precipitation

Busselton gets around 66 mm of rain over 10.5 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 35% and peaks near 39% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
139
239
339
439
539
638
738
837
937
1037
1136
1236
1336
1436
1535
1635
1735
1834
1934
2033
2133
2232
2332
2432
2531
2630
2730
2829
2929
3028

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the dry band about 96% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19730
29730
39730
49730
59730
69730
79631
89631
99631
109631
119631
129541
139541
149541
159541
169541
179640
189640
199640
209640
219640
229640
239640
249640
259640
269640
279640
289640
299550
309550

Wind in September

Winds average 18 km/h in September.

Across September, daily wind ranges from about 17 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2917light breeze
3017light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 18 min at the start of September to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over September. Sunrise moves from 6:40 AM to 5:59 AM, and sunset from 5:56 PM to 6:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.36:405:56
211.36:395:57
311.36:385:58
411.46:365:58
511.46:355:59
611.46:336:00
711.56:326:01
811.56:316:01
911.56:296:02
1011.66:286:03
1111.66:266:03
1211.76:256:04
1311.76:236:05
1411.76:226:05
1511.86:216:06
1611.86:196:07
1711.86:186:07
1811.96:166:08
1911.96:156:09
2011.96:136:10
2112.06:126:10
2212.06:106:11
2312.06:096:12
2412.16:086:12
2512.16:066:13
2612.26:056:14
2712.26:036:15
2812.26:026:15
2912.36:006:16
3012.35:596:17

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.16 kWh/m².

For context, solar energy here swings from a low near 2.19 kWh/m² to a high of 8.03 kWh/m² in January across the year — September's 4.16 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.6Moderate
33.7Moderate
43.7Moderate
53.7Moderate
63.8Moderate
73.8Moderate
83.9Moderate
93.9Moderate
103.9Moderate
114.0Moderate
124.0Bright
134.1Bright
144.1Bright
154.2Bright
164.2Bright
174.2Bright
184.3Bright
194.3Bright
204.4Bright
214.4Bright
224.5Bright
234.5Bright
244.5Bright
254.6Bright
264.6Bright
274.7Bright
284.7Bright
294.8Bright
304.8Bright
Planning a trip in September

Hazard calendar for Busselton

In seasonPeak

In September, Busselton sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Busselton sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Busselton's rainy season runs May–September, when most of the year's rain falls.

Cyclone
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Busselton?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.1
Sightseeing
9th-best month of the year
0.9
Beach & pool
10th-best month of the year

September is a reasonable time to visit Busselton for sightseeing.

What to pack for Busselton in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Busselton sees daytime highs around 16°C and nights near 11°C. Worth packing: a warm layer and rain gear. About 11 days see rain.

a warm layerrain gear

Sea temperature near Busselton in September

The nearest coast averages about 17°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in March at about 21°C and coldest in September near 17°C.

It's comfortable for a long swim from Dec 14 to May 18 — about 5.1 months when the water holds above 20°C.

16°18°20°22°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan21Refreshing
Feb21Refreshing
Mar21Refreshing
Apr21Refreshing
May20Refreshing
Jun19Cool
Jul18Cool
Aug17Cool
Sep17Cool
Oct18Cool
Nov19Cool
Dec20Refreshing

UV index in Busselton in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Busselton peaks around January 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeModerateVery highExtremeJan 12UV 13Jun 20UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar10Extreme
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep7Very high
Oct8Very high
Nov10Very high
Dec12Extreme
Location & terrain

Where is Busselton?

Busselton sits at 33.7°S, 115.3°E, 7 m above sea level, in Australia. The nearest listed city is Margaret River, 42 km away.

Topography around Busselton

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Busselton.

Within 3 km, the terrain around Busselton has only modest variations in elevation — a maximum elevation change of 16 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 165 m; within 80 km, significant variations in elevation — a maximum elevation change of 376 m.

The land around Busselton is covered by water (37%), grassland (27%) and artificial surfaces (22%) within 3 km, water (41%) and grassland (36%) within 16 km, and trees (43%) and water (39%) within 80 km.

3 km
16 m
16 km
165 m
80 km
376 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Margaret River 42 km · Bunbury 45 km · Australind 54 km · Mandurah 130 km · Baldivis 154 km · Rockingham 157 km · Kwinana 163 km · Byford 171 km

Australia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type I
230 V · 50 Hz
Prices
≈ 90% of US
price level, 2025
GDP per capita
$65,130
2025
Happiness
6.9 / 10
World Happiness, 2025
Homicide rate
0.9
per 100k, 2023
Road deaths
4.9
per 100k/yr, 2019
Income group
High
World Bank
Religion
none 38%Roman Catholic 20%Protestant 18%other Christian 4%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Busselton (-33.6525°, 115.3455°, elevation 7 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).