Indonesia in September
September is one of Indonesia's best months (rank 3 of 12): its 18 destinations average 76/100, led by Gili Trawangan at 91 — 35°C and 6 rainy days — while Uluwatu is cooler at 28°C and scores 89.
#3 of 12 months for Indonesia · 18 destinations · updated September 2026 · climate normals from ERA5 reanalysis
🇮🇩 Indonesia, month by month
76/100 in SeptemberWhere in Indonesia in September
Comfort is SeasonMap's 0–100 score; each place is judged through the lens that suits it — beaches on beach weather, ski resorts on snow. "At its best" means September is one of that place's own top three months. Feels-like highs fold in humidity, wind and sun.
What's on in Indonesia in September
- Turtle nesting · Gili Trawangan · 1 May – 31 Oct (usually)
- Mola season · Nusa Penida · 1 Jul – 31 Oct (usually)
- Sekaten and Grebeg Maulud · Yogyakarta · 1 Aug – 15 Oct (usually)
- Festival Danau Toba · Lake Toba · 1 Jun – 30 Sep (usually)
Seasons in force
Peak crowds at 2 of Indonesia's 10 well-known places this month.