Sumbawa
Island Indonesian island in the Lesser Sunda chain with volcanoes
East of Lombok, Sumbawa island includes Mount Tambora’s slopes and surf breaks like Lakey Peak; travelers come for surfing, diving, trekking and less-developed beaches than nearby tourist hubs.
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Sumbawa is an island in Indonesia’s West Nusa Tenggara province, located east of Lombok and west of Flores. The island is volcanic in origin and combines rugged interior highlands with coastal plains and reef-fringed shores.
The island’s most prominent feature is Mount Tambora on its northern flank, the site of the huge 1815 eruption that produced one of the largest historic volcanic explosions, left a large caldera and had measurable global climatic effects. The island is also known for surf breaks, diving sites off its coasts and traditional coastal fisheries.
Sumbawa’s communities are concentrated along the coast and in several inland towns such as Sumbawa Besar, which provide transport links and services. The island is accessed by ferry and by air via regional airports on neighbouring islands and in Sumbawa Besar.
- Tambora eruption: Home to Mount Tambora, whose 1815 eruption was a major global event and reshaped the volcano's summit caldera and regional climate impacts.
What to See #
- Mount Tambora: Mount Tambora - a large stratovolcano on the northern part of the island whose 1815 eruption was one of the largest in recorded history.
- Sumbawa Besar: Sumbawa Besar - the island's main administrative town and a local hub for transport and access to inland areas and beaches.
How to Get to Sumbawa #
Sumbawa is an island in West Nusa Tenggara best reached by ferry or by limited domestic flights. Regular roll-on/roll-off ferries connect western Sumbawa (Poto Tano) with eastern Lombok and eastern Sumbawa (Sape) with Flores; those ferry ports are the main overland links to Lombok (Mataram) and Flores. There are also small domestic airports on the island (Bima and Sumbawa/Sumbawa Besar) with infrequent flights to larger hubs such as Lombok and Bali.
On the island itself travel is by road: expect to use local buses, shared taxis or private car to reach towns and beaches from the ferry terminals or airports. If arriving from Lombok or Bali, plan for the ferry crossing plus driving time on Sumbawa’s main coastal roads to your destination.
Tips for Visiting Sumbawa #
- Plan Sumbawa trips for the dry season (roughly April-October) when roads and boat links are most reliable and surf breaks are at their best; avoid the monsoon months if you want predictable conditions.
- Use the island's main transport hubs rather than random jetties: Poto Tano is the principal ferry link to Lombok on the west coast, while Bima (Sultan Muhammad Salahuddin) is the main airport-book connections in advance as services can be infrequent.
- Most visitors stay around the well-known surf beaches (Lakey Peak/Dompu area); to avoid crowds and discover quieter coastal villages, head east or inland from the surf strip and ask local operators about short boat trips to nearby lesser-known beaches and islands.
Best Time to Visit Sumbawa #
Visit Sumbawa in the dry season (May-October) for the most reliable weather for beaches, diving and boat travel.
Weather & Climate near Sumbawa #
Sumbawa's climate is classified as Tropical Savanna - Tropical Savanna climate with consistently warm temperatures year-round. Temperatures range from 21°C to 33°C. Abundant rainfall (1315 mm/year), wettest in December with a pronounced dry season.
January
January is hot, feeling like 30°C with oppressive humidity. Heavy rain (220 mm) and mostly overcast skies.
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February
February is hot, feeling like 30°C with oppressive humidity. Significant rainfall (173 mm) and mostly overcast skies.
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March
March is hot, feeling like 30°C with oppressive humidity. Significant rainfall (174 mm) and mostly overcast skies.
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April
April is hot, feeling like 30°C due to high humidity. Significant rainfall (106 mm) and partly cloudy skies.
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May
May is hot, feeling like 30°C due to high humidity. Moderate rainfall (60 mm).
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June
June is warm with muggy conditions (dew point 22°C). Moderate rainfall (34 mm).
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July
July is warm with highs of 31°C and lows of 21°C. The driest month with just 14 mm.
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August
August is warm with highs of 32°C and lows of 21°C. Light rainfall and mostly sunny skies.
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September
September is hot, feeling like 30°C due to high humidity. Light rainfall and mostly sunny skies.
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October
October is the hottest month, feeling like 32°C due to high humidity. Regular rainfall (86 mm).
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November
November is hot, feeling like 32°C due to high humidity. Significant rainfall (155 mm) and partly cloudy skies.
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December
December is hot, feeling like 30°C due to high humidity. The wettest month with heavy rain (243 mm) and mostly overcast skies.
