Mild
Average highs are around 22°C, so days are mild rather than hot.
September verdict
Great Australian Bight Marine Park, Australia in September
Weather score51Mixed
Mixed for holiday weather
Average highs are around 22°C, so days are mild rather than hot. Sunshine averages 8.2h per day, so bright days are a strong part of the month. Rainfall averages 24mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
22°C
Rain
24mm
Sun
8.2h
Sea
16°C
Weather score
51
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 24mm, which is relatively low for holiday planning.
Bright
Sunshine averages 8.2h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 16°C, so the water can feel cool.
Map
Weather map
Compare Great Australian Bight Marine Park, Australia with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September22°C average high
September is on the cooler side of Great Australian Bight Marine Park's year, useful if you prefer less intense daytime heat.
Warmest monthsJanuary to March and November to December
This stretch sets the upper range for average daytime heat.
Rain
September24mm average rain
September is close to Great Australian Bight Marine Park's usual rainfall pattern, with little seasonal change across the year.
Driest monthsAll year
Rainfall stays comparatively low through the year.
Sun
September8.2 hours average sun
September sits close to Great Australian Bight Marine Park's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsJanuary to February and November to December
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September16°C average sea
September is one of the coolest sea months, so the water may feel fresher than in peak months.
Warmest seaJanuary to April and December
Sea temperatures are usually near 20°C in this stretch, so swimming comfort is at its strongest.
Weather score
September51 weather score
September scores below Great Australian Bight Marine Park's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJanuary to March and December
These months have the strongest weather score in the monthly averages.