December in Byron Bay typically sees daytime highs of 27°C (81°F) and nighttime lows of 21°C (70°F). Rainfall is also possible this month, so it's worth packing an umbrella.
December in Byron Bay has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Min Temperature
Max Temperature
Water Temperature
Chance of Rain
Precipitation
Rainy days
Sunshine
Percentage Sunshine
Pick a month to see the average temperature, rainfall and sunshine in Byron Bay - and find the best time to visit.
43-year average (1976-2025)
Based on our historical records, temperatures in Byron Bay typically stay consistent throughout December, with daily highs averaging around 27°C (81°F). Nights are warm, with lows around 20°C (68°F).
43-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Byron Bay spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Based on 35 years of weather observations in Byron Bay between 1990 and 2025, these are the recorded extremes.
Find out more about the weather in Australia and which places have the best travel conditions in this month. See all of Australia in December →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Warm weather calls for comfortable, breathable clothing in December. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Expect water temperatures of around 25°C (77°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Water Temp
See the full Byron Bay climate overview or explore weather in Australia.
Where to go in December - average daytime high across popular destinations.
Need travel inspiration? Check out our bucket list articles and be inspired.
The most relaxed and alternative area of Australia is called the Byron Shire
The Byron Shire is one of the most pretty areas in the world. Not only in terms on natural beauty, also the relaxed vibe and people make this an area that remains close to your heart.
An alternative way to discover Sydney
We have made an overview of the sights in Sydney that you must see if you want to visit Sydney in an alternative way.
Sail the Whitsunday islands
The best travel period to sail the Whitsunday islands is “winter” between June and October, with pleasant temperatures around 23 degrees Celsius (74 Fahrenheit).
The best dive spots in Australia
Explore Australia's best dive spots: from the Great Barrier Reef to HMAS Perth. Discover vibrant corals, marine life, and historic wrecks.
