What's on in Lake Toba (Toba), Indonesia through the year

Peak crowds — Batak Christmas, Year-end break in Indonesia

Nothing new starts in January.

Still on: Wet season on the caldera (1 Oct – 30 Apr (usually)), Batak Christmas (15 Dec – 5 Jan)

Busy — school holidays in 2 of the markets that fill it, one of its best months for weather

Nothing new starts in February.

Still on: Wet season on the caldera (1 Oct – 30 Apr (usually))

Busy — Lebaran (Idul Fitri) break in Indonesia, school holidays in 2 of the markets that fill it

Nothing new starts in March.

Still on: Wet season on the caldera (1 Oct – 30 Apr (usually))

Shoulder season — school holidays in 3 of the markets that fill it, an ordinary month

Nothing new starts in April.

Still on: Wet season on the caldera (1 Oct – 30 Apr (usually))

Shoulder season — school holidays in 2 of the markets that fill it, an ordinary month

Nothing new starts in May.

Peak crowds — Festival Danau Toba, Mid-year break in Indonesia

• Festival

  Festival Danau Toba

  1 Jun – 30 Sep · usuallyMajor festivalCrowded

  The regional government's flagship week of Batak music, canoe racing and dance, usually held on Samosir in the dry half of the year. The dates move and have been postponed more than once. Source ↗

• Season

  Dry season

  1 Jun – 30 Sep · usually

  The clearest air and the flattest water of the year, when the far wall of the caldera is visible from Tuk Tuk all day. Nights on the lake stay cool enough for a blanket.

Peak crowds — Festival Danau Toba, Mid-year break in Indonesia

• Hazard

  Sumatran haze

  15 Jul – 15 Oct · usuallySmoke season

  In a dry year, smoke from land clearing further south on the island drifts north and the caldera rim goes flat and grey. Some years it never arrives at all. Source ↗

Still on: Festival Danau Toba (1 Jun – 30 Sep (usually)), Dry season (1 Jun – 30 Sep (usually))

Peak crowds — travelers describe it as peak season, Festival Danau Toba

Nothing new starts in August.

Still on: Festival Danau Toba (1 Jun – 30 Sep (usually)), Dry season (1 Jun – 30 Sep (usually)), Sumatran haze (15 Jul – 15 Oct (usually))

Busy — Festival Danau Toba, school holidays in 3 of the markets that fill it

Nothing new starts in September.

Still on: Festival Danau Toba (1 Jun – 30 Sep (usually)), Dry season (1 Jun – 30 Sep (usually)), Sumatran haze (15 Jul – 15 Oct (usually))

Quiet — school holidays in 3 of the markets that fill it, one of its worst months for weather

• Season

  Wet season on the caldera

  1 Oct – 30 Apr · usuallyMonsoon

  Afternoon and evening storms roll down the crater walls onto the lake, and the ferry to Samosir gets choppy. Mornings are usually clear, which is when the walking is done.

Still on: Sumatran haze (15 Jul – 15 Oct (usually))

Quiet — one of its worst months for weather

Nothing new starts in November.

Still on: Wet season on the caldera (1 Oct – 30 Apr (usually))

Peak crowds — Batak Christmas, Year-end break in Indonesia

• Holiday

  Batak Christmas

  15 Dec – 5 JanChristmas & New YearCrowdedBook early

  Toba is Christian Batak country and the diaspora comes home for it: full churches, brass bands, and every guesthouse on Samosir taken by families rather than travellers. Source ↗

Still on: Wet season on the caldera (1 Oct – 30 Apr (usually))