Indonesia
Bali in September: weather, sea & travel advice
This month's data profile
Sea conditions lead
Bali in September is climatically well suited to beach holidays, family holidays and city breaks. The average daily high is around 28 °C, and the sea is about 26 °C. With about 5 rainy days it is dry.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
86/100 · #3
Warmth
#4
Dryness
#2
Sun
#2
Sea warmth
#11
Published best categories: Overall, Beach, City break, Active, Family
Bali · SeptemberPhoto: Gunadhi · CC BY-SA 4.0Climate facts
- Average high
- 28 °C
- Average low
- 22 °C
- Sea
- 26 °C
- Rainy days (est.)
- 5 rainy days (est.)
- Sun (est.)
- 8 h/day
- Humidity
- 80 %
For your trip planning
September: among the best months, before October's rain rises
September is one of the best months on Bali in our series. It is a little warmer than August with somewhat more rain, while October brings higher average daily highs and about twice September's precipitation. With the sea at 26 °C, swimming is plausible, which makes September a good fit for a beach-focused trip before the wetter weeks begin.
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| August | 27 | 21 | 5 | 23 | 7.2 | 81 | 1.7 | 26 | 89 |
| September (selected) | 28 | 22 | 5 | 38 | 7.8 | 80 | 1.6 | 26 | 86 |
| October | 30 | 23 | 11 | 80 | 8.1 | 79 | 1.4 | 27 | 73 |
How do the previous and next months compare?
Baseline: September (86/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| August | +3 | -1.3 °C | -0.6 °C | -0.5 | -15.7 mm | -0.6 h | +1.4 % | +0.1 m/s | -0.3 °C |
| October | -13 | +1.3 °C | +1 °C | +5.3 | +41.6 mm | +0.3 h | -0.7 % | -0.2 m/s | +0.9 °C |
All twelve months in context
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Frequently asked questions
How warm is Bali in September?
The average daily high is around 28 °C, with an average daily low of about 22 °C.
Can you swim in Bali in September?
The sea is about 26 °C (warm).
Does it rain a lot in Bali in September?
The curated estimate is about 5 rainy days per month, not a directly measured long-term average. Total precipitation averages around 38 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Bali?
By the climate score, June, July, August and September are the strongest months for Bali. For a beach trip: June, July, August and September. September is one of them.