September 12 is generally a great time to visit Bali. While there is a slight chance of rain (19%), showers are usually brief. Expect comfortable 27°C weather. Bali is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Bali
Currency
IDR
Rp Indonesian rupiah
Language
Indonesian
Driving
Left side
Connect
Unfortunately, it is very unlikely you w...
Safety
High Safety
GPI: 1.8
Bali Weather Forecast for September 12
"Warm & Sunny. Expect average highs of 26.8°C. 19% chance of rain."
What to Wear in Bali in September
Based on historical data for September 12, Bali typically experiences temperatures between 23.9°C and 26.8°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (19% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Bali
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
26.8°C
Daytime Peak
Average Low
23.9°C
Nighttime Low
Feels Like
28.2°C
🔥 Minor difference
Rain Chance
19%
Avg 0.9mm if it rains
Cloud Cover
56%
Light drizzle
Pressure
1012.5 hPa
Low volatility
Bali Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ This date historically delivers consistent weather 75% 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
🔴 22 min to burn
Type III-IV
🟡 33 min to burn
Type V-VI
🟢 55 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
23.5°C
Humid/Sticky
Heat Stress
Low
No heat warning
😐 Best outdoor time:
Morning hours (before 11 AM)
Marine Conditions
Jellyfish Warning
High water temps may attract jellyfish swarms.
Swim Index
⚠️ Mixed Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Indonesia
Flight Traffic
High
96/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~213
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Bali
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:16
☀️ Noon
12:17
🌇 Sunset
18:17
⏱️ Daylight
12h 1m
Wind Speed
20.6 km/h
Moderate wind
Sunshine
10.9 hrs
Direct Sun (Cloud-free)
Humidity
82%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Bali
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Bali
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Mild discomfort possible for arthritic conditions.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Active seismic zone. Multiple earthquakes per year.
Volcanic Activity
Nearest: Mount Agung
55.9km away
Travel Alert: This region has elevated natural risks. We recommend registering with your embassy and keeping emergency numbers handy.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Bali on September 12 averages 26.8°C with a 19% precipitation probability. Wedding/Outdoor Event Score: 95/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Bali Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
September 5
26.8°C • 13% rain
Score
100
September 7
26.8°C • 13% rain
Score
100
September 6
26.8°C • 15% rain
Score
97
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (September 12) in other destinations
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📍 Is Bali Worth Visiting on September 12?
Planning a trip to Bali on September 12? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 26.8°C with a 19% historical precipitation risk.
✈️ Travel Logistics: Approximately 213 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 11 vaccinations are recommended for Indonesia, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 28.2°C (tropical bath). Wave conditions are generally surfers only with heights around 1.33m.
📊 Historical Extremes: The hottest September 12 recorded in the last 30 years saw temperatures hit 28.2°C in 2025, while the coldest dropped to 23.7°C in 2019.