Byron Bay weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Excellent
Best time to visit: October – April
What is the weather like in Byron Bay in December?
In December, Byron Bay is warm: daytime highs average 26 °C, and even at night it stays warm at around 20 °C. The sea averages 24.8 °C – pleasant for swimming. With around 9 hours of sunshine a day, there is plenty of sun. Rain is frequent, with about 13 rainy days and 108 mm in total. The air is often humid and muggy. All in all, December is an excellent month for a holiday in Byron Bay.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 87 | 87 | 85 |
| Day | 25° | 26° | 27° |
| Night | 19° | 20° | 21° |
| Sea | 23° | 25° | 26° |
| Sun | 10 h | 9 h | 10 h |
| Rain days | 12 | 13 | 14 |
More details for December
- Daylight
- 13 h 57 min05:42 – 19:39
- UV index
- 12 · extremeclear sky, noon (estimate)All months
- Muggy days
- 18 daysdew point 18 °C or moreAll months
- Wind
- 19 km/haverage daily peakAll months
- Cloud cover
- 56 %on averageAll months
- Hot days
- 3 days30 °C or moreAll months
- Time zone
- UTC+11Australia/Sydney
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 20 %37 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in December
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Byron Bay in December: quick answers
Is Byron Bay hot in December?
Warm rather than hot: in December, daytime highs in Byron Bay average 26 °C and nights cool to about 20 °C. On about 3 days the thermometer climbs to 30 °C or more.
Can you swim in Byron Bay in December?
Yes. In December the sea averages 24.8 °C – pleasant for swimming.
Does it rain much in Byron Bay in December?
Rain is frequent, with about 13 rainy days and 108 mm in total.
Byron Bay month by month
The whole year in Byron BayAll destinations: AustraliaWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences