Byron Bay weather in December
In December, Byron Bay sees average daytime highs of 27°C and overnight lows near 20°C, with 109 mm of rain across 12.5 wet days and about 13.8 hours of daylight. It is the 3rd-warmest and 4th-wettest month of the year here.
Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 33% of the time in December, and the air most often feels muggy.
Daylight stretches from about 13 h 42 min at the start of December to 13 h 48 min by month's end. Set against the rest of the year, December is Byron Bay's 10th-clearest and 3rd-windiest month. For the whole year in context, see Byron Bay's year-round climate.
- Daytime high
- 27°
- 3rd warmest
- Overnight low
- 20°
- 10th coldest
- Rainfall
- 109 mm
- 12.5 wet days
- Daylight
- 13 h 48 min
- 5:47 AM – 7:36 PM
- Cloud cover
- 56%
- 10th clearest
- Wind
- 13 km/h
- 3rd windiest
- Solar energy
- 6.81 kWh/m²
- Travel score
- 6.2
- out of 10
Byron Bay is town in New South Wales, Australia.
- Density
- 1/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Day-to-day highs hold fairly steady near 27°C through the month.
A typical December day in Byron Bay reaches about 27°C in the afternoon and slips back to 20°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 30°C. Set against its neighbours, December runs about 1°C warmer than November and on par with January.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 |
| Avg low (°C) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 26 | 20 |
| 2 | 26 | 20 |
| 3 | 26 | 20 |
| 4 | 26 | 20 |
| 5 | 27 | 20 |
| 6 | 27 | 20 |
| 7 | 27 | 20 |
| 8 | 27 | 20 |
| 9 | 27 | 20 |
| 10 | 27 | 20 |
| 11 | 27 | 20 |
| 12 | 27 | 20 |
| 13 | 27 | 20 |
| 14 | 27 | 20 |
| 15 | 27 | 20 |
| 16 | 27 | 20 |
| 17 | 27 | 20 |
| 18 | 27 | 20 |
| 19 | 27 | 20 |
| 20 | 27 | 20 |
| 21 | 27 | 20 |
| 22 | 27 | 21 |
| 23 | 27 | 21 |
| 24 | 27 | 21 |
| 25 | 27 | 21 |
| 26 | 27 | 21 |
| 27 | 27 | 21 |
| 28 | 27 | 21 |
| 29 | 27 | 21 |
| 30 | 27 | 21 |
| 31 | 27 | 21 |
Byron Bay weather by month
How December compares with the rest of the year at a glance. December is the 3rd-warmest and 4th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 27° / 21° | 140 | 13.6 | 13.6 | 6.0 |
| Feb | 27° / 21° | 138 | 13.7 | 13 | 5.7 |
| Mar | 26° / 20° | 128 | 15.3 | 12.2 | 6.0 |
| Apr | 24° / 17° | 78 | 12.5 | 11.3 | 6.6 |
| May | 22° / 14° | 87 | 10.4 | 10.6 | 6.8 |
| Jun | 20° / 12° | 102 | 9.7 | 10.2 | 6.5 |
| Jul | 19° / 11° | 50 | 7 | 10.4 | 7.0 |
| Aug | 20° / 11° | 55 | 6.4 | 11 | 7.4 |
| Sep | 22° / 14° | 40 | 6.8 | 11.8 | 7.6 |
| Oct | 24° / 16° | 78 | 9.5 | 12.7 | 7.3 |
| Nov | 25° / 18° | 104 | 11.1 | 13.4 | 6.7 |
| Dec | 27° / 20° | 109 | 12.5 | 13.8 | 6.2 |
Cloud cover in December
The sky is clear or mostly clear about 33% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 21% of December, with mostly cloudy or overcast conditions the remaining 45%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 59 | 57 | 56 | 56 | 54 | 54 | 53 | 53 | 53 | 52 | 52 | 52 | 52 | 53 | 53 | 53 | 53 | 54 | 54 | 54 | 55 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 55 | 55 |
| Cloudier (%) | 41 | 43 | 44 | 44 | 46 | 46 | 47 | 47 | 47 | 48 | 48 | 48 | 48 | 47 | 47 | 47 | 47 | 46 | 46 | 46 | 45 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 45 | 45 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 59 | 41 |
| 2 | 57 | 43 |
| 3 | 56 | 44 |
| 4 | 56 | 44 |
| 5 | 54 | 46 |
| 6 | 54 | 46 |
| 7 | 53 | 47 |
| 8 | 53 | 47 |
| 9 | 53 | 47 |
| 10 | 52 | 48 |
| 11 | 52 | 48 |
| 12 | 52 | 48 |
| 13 | 52 | 48 |
| 14 | 53 | 47 |
| 15 | 53 | 47 |
| 16 | 53 | 47 |
| 17 | 53 | 47 |
| 18 | 54 | 46 |
| 19 | 54 | 46 |
| 20 | 54 | 46 |
| 21 | 55 | 45 |
| 22 | 56 | 44 |
| 23 | 56 | 44 |
| 24 | 56 | 44 |
| 25 | 56 | 44 |
| 26 | 56 | 44 |
| 27 | 56 | 44 |
| 28 | 56 | 44 |
| 29 | 56 | 44 |
| 30 | 55 | 45 |
| 31 | 55 | 45 |
Chance of precipitation in December
Byron Bay gets around 109 mm of rain over 12.5 wet days in December. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 40% and peaks near 42% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 36 | 36 | 37 | 38 | 39 | 39 | 40 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 40 | 40 | 40 | 40 | 41 | 41 | 41 | 42 | 42 | 42 |
| Rain chance (%) | |
|---|---|
| 1 | 36 |
| 2 | 36 |
| 3 | 37 |
| 4 | 38 |
| 5 | 39 |
| 6 | 39 |
| 7 | 40 |
| 8 | 41 |
| 9 | 41 |
| 10 | 41 |
| 11 | 41 |
| 12 | 41 |
| 13 | 41 |
| 14 | 41 |
| 15 | 41 |
| 16 | 41 |
| 17 | 41 |
| 18 | 41 |
| 19 | 41 |
| 20 | 41 |
| 21 | 41 |
| 22 | 40 |
| 23 | 40 |
| 24 | 40 |
| 25 | 40 |
| 26 | 41 |
| 27 | 41 |
| 28 | 41 |
| 29 | 42 |
| 30 | 42 |
| 31 | 42 |
Humidity in December
Most of December feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the muggy band about 41% of days. Sticky, muggy-or-worse air turns up on roughly 52% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 |
| Comfortable (%) | 18 | 18 | 18 | 17 | 17 | 17 | 16 | 16 | 16 | 15 | 15 | 15 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 8 | 8 | 8 |
| Humid (%) | 36 | 35 | 35 | 34 | 33 | 33 | 33 | 32 | 32 | 32 | 32 | 32 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 32 | 32 | 32 | 31 | 31 | 30 |
| Muggy (%) | 36 | 37 | 37 | 38 | 39 | 40 | 40 | 41 | 41 | 41 | 42 | 42 | 42 | 41 | 41 | 41 | 41 | 41 | 41 | 40 | 40 | 40 | 40 | 40 | 40 | 41 | 41 | 42 | 43 | 43 | 44 |
| Oppressive (%) | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 10 | 10 | 11 | 11 | 12 | 12 | 13 | 13 | 14 | 14 | 15 | 15 | 15 | 16 | 16 | 16 | 17 | 17 | 17 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 4 | 18 | 36 | 36 | 6 |
| 2 | 4 | 18 | 35 | 37 | 6 |
| 3 | 3 | 18 | 35 | 37 | 7 |
| 4 | 3 | 17 | 34 | 38 | 7 |
| 5 | 3 | 17 | 33 | 39 | 7 |
| 6 | 3 | 17 | 33 | 40 | 8 |
| 7 | 3 | 16 | 33 | 40 | 8 |
| 8 | 3 | 16 | 32 | 41 | 8 |
| 9 | 3 | 16 | 32 | 41 | 8 |
| 10 | 2 | 15 | 32 | 41 | 9 |
| 11 | 2 | 15 | 32 | 42 | 9 |
| 12 | 2 | 15 | 32 | 42 | 9 |
| 13 | 2 | 14 | 33 | 42 | 10 |
| 14 | 2 | 14 | 33 | 41 | 10 |
| 15 | 2 | 13 | 33 | 41 | 11 |
| 16 | 2 | 13 | 33 | 41 | 11 |
| 17 | 1 | 13 | 33 | 41 | 12 |
| 18 | 1 | 12 | 33 | 41 | 12 |
| 19 | 1 | 12 | 33 | 41 | 13 |
| 20 | 2 | 12 | 33 | 40 | 13 |
| 21 | 2 | 11 | 33 | 40 | 14 |
| 22 | 2 | 11 | 33 | 40 | 14 |
| 23 | 2 | 11 | 33 | 40 | 15 |
| 24 | 2 | 10 | 33 | 40 | 15 |
| 25 | 2 | 10 | 33 | 40 | 15 |
| 26 | 1 | 10 | 32 | 41 | 16 |
| 27 | 1 | 9 | 32 | 41 | 16 |
| 28 | 1 | 9 | 32 | 42 | 16 |
| 29 | 1 | 8 | 31 | 43 | 17 |
| 30 | 1 | 8 | 31 | 43 | 17 |
| 31 | 1 | 8 | 30 | 44 | 17 |
Wind in December
Winds average 13 km/h in December.
Across December, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 13 | light breeze |
| 2 | 13 | light breeze |
| 3 | 13 | light breeze |
| 4 | 13 | light breeze |
| 5 | 13 | light breeze |
| 6 | 13 | light breeze |
| 7 | 13 | light breeze |
| 8 | 13 | light breeze |
| 9 | 13 | light breeze |
| 10 | 13 | light breeze |
| 11 | 13 | light breeze |
| 12 | 13 | light breeze |
| 13 | 13 | light breeze |
| 14 | 13 | light breeze |
| 15 | 13 | light breeze |
| 16 | 13 | light breeze |
| 17 | 13 | light breeze |
| 18 | 13 | light breeze |
| 19 | 13 | light breeze |
| 20 | 13 | light breeze |
| 21 | 13 | light breeze |
| 22 | 13 | light breeze |
| 23 | 13 | light breeze |
| 24 | 13 | light breeze |
| 25 | 13 | light breeze |
| 26 | 13 | light breeze |
| 27 | 13 | light breeze |
| 28 | 13 | light breeze |
| 29 | 13 | light breeze |
| 30 | 13 | light breeze |
| 31 | 13 | light breeze |
Sunrise & sunset in December
Daylight runs from about 13 h 42 min at the start of December to 13 h 48 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 6 minutes over December. Sunrise moves from 5:44 AM to 5:55 AM, and sunset from 7:26 PM to 7:43 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 |
| Sunrise (AM) | 5:44 | 5:45 | 5:45 | 5:45 | 5:45 | 5:45 | 5:45 | 5:45 | 5:45 | 5:46 | 5:46 | 5:46 | 5:46 | 5:47 | 5:47 | 5:47 | 5:48 | 5:48 | 5:48 | 5:49 | 5:49 | 5:50 | 5:50 | 5:51 | 5:51 | 5:52 | 5:52 | 5:53 | 5:53 | 5:54 | 5:55 |
| Sunset (PM) | 7:26 | 7:27 | 7:28 | 7:28 | 7:29 | 7:30 | 7:30 | 7:31 | 7:32 | 7:32 | 7:33 | 7:34 | 7:34 | 7:35 | 7:36 | 7:36 | 7:37 | 7:37 | 7:38 | 7:38 | 7:39 | 7:39 | 7:40 | 7:40 | 7:41 | 7:41 | 7:41 | 7:42 | 7:42 | 7:42 | 7:43 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.7 | 5:44 | 7:26 |
| 2 | 13.7 | 5:45 | 7:27 |
| 3 | 13.7 | 5:45 | 7:28 |
| 4 | 13.7 | 5:45 | 7:28 |
| 5 | 13.7 | 5:45 | 7:29 |
| 6 | 13.7 | 5:45 | 7:30 |
| 7 | 13.8 | 5:45 | 7:30 |
| 8 | 13.8 | 5:45 | 7:31 |
| 9 | 13.8 | 5:45 | 7:32 |
| 10 | 13.8 | 5:46 | 7:32 |
| 11 | 13.8 | 5:46 | 7:33 |
| 12 | 13.8 | 5:46 | 7:34 |
| 13 | 13.8 | 5:46 | 7:34 |
| 14 | 13.8 | 5:47 | 7:35 |
| 15 | 13.8 | 5:47 | 7:36 |
| 16 | 13.8 | 5:47 | 7:36 |
| 17 | 13.8 | 5:48 | 7:37 |
| 18 | 13.8 | 5:48 | 7:37 |
| 19 | 13.8 | 5:48 | 7:38 |
| 20 | 13.8 | 5:49 | 7:38 |
| 21 | 13.8 | 5:49 | 7:39 |
| 22 | 13.8 | 5:50 | 7:39 |
| 23 | 13.8 | 5:50 | 7:40 |
| 24 | 13.8 | 5:51 | 7:40 |
| 25 | 13.8 | 5:51 | 7:41 |
| 26 | 13.8 | 5:52 | 7:41 |
| 27 | 13.8 | 5:52 | 7:41 |
| 28 | 13.8 | 5:53 | 7:42 |
| 29 | 13.8 | 5:53 | 7:42 |
| 30 | 13.8 | 5:54 | 7:42 |
| 31 | 13.8 | 5:55 | 7:43 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 6.81 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 2.92 kWh/m² to a high of 6.81 kWh/m² in December across the year — December's 6.81 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.9 | 6.9 | 6.9 | 6.9 | 7.0 | 7.0 | 7.0 | 7.0 | 7.0 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.8 | Intense |
| 2 | 6.8 | Intense |
| 3 | 6.8 | Intense |
| 4 | 6.8 | Intense |
| 5 | 6.8 | Intense |
| 6 | 6.8 | Intense |
| 7 | 6.8 | Intense |
| 8 | 6.8 | Intense |
| 9 | 6.8 | Intense |
| 10 | 6.8 | Intense |
| 11 | 6.8 | Intense |
| 12 | 6.8 | Intense |
| 13 | 6.8 | Intense |
| 14 | 6.8 | Intense |
| 15 | 6.8 | Intense |
| 16 | 6.9 | Intense |
| 17 | 6.9 | Intense |
| 18 | 6.9 | Intense |
| 19 | 6.9 | Intense |
| 20 | 7.0 | Intense |
| 21 | 7.0 | Intense |
| 22 | 7.0 | Intense |
| 23 | 7.0 | Intense |
| 24 | 7.0 | Intense |
| 25 | 7.1 | Intense |
| 26 | 7.1 | Intense |
| 27 | 7.1 | Intense |
| 28 | 7.1 | Intense |
| 29 | 7.1 | Intense |
| 30 | 7.1 | Intense |
| 31 | 7.1 | Intense |
Hazard calendar for Byron Bay
In December, Byron Bay sits inside its cyclone season. The full year is below, with each hazard's peak months called out.
Byron Bay sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Is December a good time to visit Byron Bay?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a reasonable time to visit Byron Bay for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Byron Bay in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Byron Bay sees daytime highs around 27°C and nights near 20°C. Pack sun protection. Worth having: light clothes and rain gear. About 13 days see rain.
Sea temperature near Byron Bay in December
The nearest coast averages about 25°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in February at about 26°C and coldest in August near 21°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 26 | 26 | 26 | 25 | 24 | 22 | 21 | 21 | 21 | 22 | 24 | 25 |
| Comfort | Warm | Warm | Warm | Warm | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 26 | Warm |
| Feb | 26 | Warm |
| Mar | 26 | Warm |
| Apr | 25 | Warm |
| May | 24 | Refreshing |
| Jun | 22 | Refreshing |
| Jul | 21 | Refreshing |
| Aug | 21 | Refreshing |
| Sep | 21 | Refreshing |
| Oct | 22 | Refreshing |
| Nov | 24 | Refreshing |
| Dec | 25 | Warm |
UV index in Byron Bay in December
Clear-sky midday UV in December peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Byron Bay peaks around January 21 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 14 | 13 | 11 | 8 | 5 | 4 | 4 | 6 | 7 | 10 | 11 | 13 |
| Level | Extreme | Extreme | Extreme | Very high | Moderate | Moderate | Moderate | High | Very high | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 13 | Extreme |
| Mar | 11 | Extreme |
| Apr | 8 | Very high |
| May | 5 | Moderate |
| Jun | 4 | Moderate |
| Jul | 4 | Moderate |
| Aug | 6 | High |
| Sep | 7 | Very high |
| Oct | 10 | Very high |
| Nov | 11 | Extreme |
| Dec | 13 | Extreme |
Where is Byron Bay?
Byron Bay sits at 28.6°S, 153.6°E, 0 m above sea level, in Australia. The nearest listed city is Banora Point, 49 km away.
Topography around Byron Bay
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Byron Bay.
Within 3 km, the terrain around Byron Bay has only modest variations in elevation — a maximum elevation change of 91 m around an average of 8 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 263 m; within 80 km, large variations in elevation — a maximum elevation change of 1,197 m.
The land around Byron Bay is covered by water (40%) and trees (38%) within 3 km, water (58%) and trees (22%) within 16 km, and water (39%) and trees (38%) within 80 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
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 Byron Bay (-28.6499°, 153.6125°, elevation 0 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).