September 15 is statistically one of the best days of the year in Byron Bay. With minimal rain risk (11%) and pleasant highs of 22°C, it's ideal for outdoor adventures. As it's peak season for Byron Bay, we recommend booking your stay well in advance to secure the best rates.
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Essential Travel Info for Byron Bay
Currency
AUD
$ Australian dollar
Language
English
Driving
Left side
Safety
High Safety
GPI: 1.565
Byron Bay Weather Forecast for September 15
"Mild & Comfortable. Expect average highs of 22°C. 11% chance of rain."
What to Wear in Byron Bay in September
Based on historical data for September 15, Byron Bay typically experiences temperatures between 14°C and 22°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (11% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Byron Bay
Smart Suitcase
- Light Jacket
- Long Pants
Average High
22°C
Daytime Peak
Average Low
14°C
Nighttime Low
Feels Like
22.3°C
☀️ Feels accurate
Rain Chance
11%
Avg 0.5mm if it rains
Cloud Cover
30%
Light drizzle
Pressure
1019.7 hPa
Medium volatility
Byron Bay Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 93% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
06:00 - 10:00
16:00 - 18:00
Type I-II
🔴 19 min to burn
Type III-IV
🟡 29 min to burn
Type V-VI
🟢 48 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
16.7°C
Noticeable
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
⚠️ Mixed Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Australia
Flight Traffic
High
81/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~58
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Byron Bay
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:45
☀️ Noon
12:42
🌇 Sunset
18:39
⏱️ Daylight
11h 53m
Wind Speed
17.5 km/h
Gentle breeze
Sunshine
10.5 hrs
Direct Sun (Cloud-free)
Humidity
72%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Byron Bay
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Byron Bay
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Byron Bay on September 15 averages 22°C with a 11% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Byron Bay Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (September 15) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Byron Bay Worth Visiting on September 15?
Planning a trip to Byron Bay on September 15? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 22°C with a 11% historical precipitation risk.
✈️ Travel Logistics: Approximately 58 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 6 vaccinations are recommended for Australia, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 20.9°C (refreshing tonic). Wave conditions are generally surfers only with heights around 1.58m.
📊 Historical Extremes: The hottest September 15 recorded in the last 30 years saw temperatures hit 24.3°C in 2016, while the coldest dropped to 10.3°C in 2017.