Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
December verdict
Great Australian Bight Marine Park, Australia in December
Weather score77Very good
Very good for holiday weather
Average highs sit around 29°C, giving warm days by monthly-average standards. Sunshine averages 9.8h per day, so bright days are a strong part of the month. Rainfall averages 16mm, which is relatively low for holiday planning.
December weather
Monthly averages
Temp
29°C
Rain
16mm
Sun
9.8h
Sea
19°C
Weather score
77
Very good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 16mm, which is relatively low for holiday planning.
Bright
Sunshine averages 9.8h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 19°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
December29°C average high
December sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJanuary to March and November to December
This stretch sets the upper range for average daytime heat.
Rain
December16mm average rain
December 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
December9.8 hours average sun
December is one of Great Australian Bight Marine Park's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsJanuary to February and November to December
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December19°C average sea
December sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
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
December77 weather score
December scores above Great Australian Bight Marine Park's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsJanuary to March and December
These months have the strongest weather score in the monthly averages.