Indonesia Bali Weather in September — Climate Guide
September in Bali is Excellent
September is Excellent for Bali.
September is the unsung best month for many Bali travelers. Weather remains at dry-season peak; crowds drop 20-30% as Northern Hemisphere schools restart; hotel rates begin declining from August peak. The best value-to-weather ratio of the second half of the year.
All outdoor activities continue at peak operation. Diving + snorkeling visibility still excellent. Mt. Batur sunrise reliability 95%+. Nusa Penida boats calm. Surf continues.
Travel score
Bali September Weather Stats
Avg High
30°C
Avg Low
24°C
Rainy Days
4
66mm total
Sunshine
10h
Daily avg
Humidity
74%
Comfortable
UV Index
11
Extreme
Wind
13 km/h
Gusts 26
Sea Temp
27°C
Avg water temp
Crowds
Busy
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
14 μg/m³
PM10
28 μg/m³
Status
Good
Feels-Like Temperature & Wind
Feels like
Daytime
33°C
Nighttime
26°C
Humidity and wind affect how the actual temperature feels.
Wind
13 km/h
Max gust 26 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Continued dry-season weather
- Crowds drop 20-30% from August
- Hotel rates begin declining mid-month
Cons
- Late September first rain returns
- Still high prices early month
- Peak surf season starting to fade
September Events & Festivals
- Crowds begin declining after Northern Hemisphere school start
- Hotel rates start declining mid-September
- Best shoulder month for value-to-weather
Bali in September — Full Picture
September is the unsung best month for many Bali travelers. Weather remains at dry-season peak; crowds drop 20-30% as Northern Hemisphere schools restart; hotel rates begin declining from August peak. The best value-to-weather ratio of the second half of the year.
All outdoor activities continue at peak operation. Diving + snorkeling visibility still excellent. Mt. Batur sunrise reliability 95%+. Nusa Penida boats calm. Surf continues.
Late September has the marginal increase in rain (first hints of wet season returning). Early-to-mid September is the optimal window. Hotel rates drop 20-30% by end of month.
What to Wear & What to Pack
Dry-season packing continues. Marginal warming from August. Standard T-shirts + shorts + swimwear + light evening layer.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
31.3°C
24°C
9.3/mo
Summer (Jun·Jul·Aug)
29.3°C
23°C
3.7/mo
Autumn (Sep·Oct·Nov)
Current30.7°C
24°C
8.7/mo
Winter (Dec·Jan·Feb)
31°C
24°C
17/mo
Bali Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 31° | 24° | 18d·326mm | 6.5h | 85% | 12 | Quiet | Low season | |
| 31° | 24° | 16d·286mm | 7h | 84% | 12 | Quiet | Low season | |
| 31° | 24° | 15d·235mm | 7.5h | 83% | 12 | Moderate | Shoulder | |
| 32° | 24° | 8d·87mm | 8.5h | 80% | 12 | Moderate | Shoulder | |
| May (Best) | 31° | 24° | 5d·71mm | 9h | 78% | 11 | Busy | Peak |
| June (Best) | 30° | 23° | 4d·47mm | 9.5h | 76% | 11 | Busy | Peak |
| July (Best) | 29° | 23° | 4d·51mm | 9.5h | 75% | 11 | Very busy | Peak |
| August (Best) | 29° | 23° | 3d·38mm | 10h | 73% | 11 | Very busy | Peak |
| September (Best) | 30° | 24° | 4d·66mm | 10h | 74% | 11 | Busy | Peak |
| 31° | 24° | 9d·116mm | 8.5h | 77% | 12 | Moderate | Shoulder | |
| 31° | 24° | 13d·187mm | 7.5h | 80% | 12 | Quiet | Low season | |
| 31° | 24° | 17d·273mm | 6.5h | 83% | 12 | Very busy | Peak |
View Other Months
Bali September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Bali?
Bali in September is Excellent. Tourist crowds are busy and flight/hotel prices are peak.
What's the average temperature in Bali in September?
Bali September averages a high of 30°C and a low of 24°C.
Does it rain much in Bali in September?
Bali September averages 66mm of rainfall over about 4 rainy days.
What should I wear in Bali in September?
Dry-season packing continues. Marginal warming from August. Standard T-shirts + shorts + swimwear + light evening layer.
What time are sunrise and sunset in Bali in September?
Bali September sunrise is 06:14 and sunset is 17:58, with 11h 44m of daylight.
What's the air quality like in Bali in September?
Bali September air quality (AQI) averages 42, rated Good. PM2.5 averages 14μg/m³.
What activities are recommended in Bali in September?
In September, Bali is great for All beach + snorkeling, Mt. Batur sunrise, Nusa Penida.
Is September peak season in Bali?
Bali September crowds are busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Bali
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.