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Germartin1 CC BY-SA 4.0 Wikimedia Commons

Una-Una

Island

A small volcanic island in Central Sulawesi's Gulf of Tomini. Divers and snorkellers visit for coral reefs and clear-water reefs; local villages provide basic guesthouses and boat access.

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In this guide

Una-Una essentials

Address: Una-Una Island, Togian Islands, Central Sulawesi, Indonesia
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About Una-Una

Una-Una is a small volcanic island in Tomini Bay off the central coast of Sulawesi, Indonesia. It is part of Tojo Una-Una Regency in Central Sulawesi.

The island’s reefs and underwater terrain attract divers and snorkelers; shorelines include fringing coral and reef slopes. Land visitors encounter a compact settlement pattern and shoreline access points rather than extensive developed infrastructure.

Formed by volcanic activity, the island has the typical steep topography of volcanic cones and a limited land area. Geological activity created the island’s central elevated area and surrounding coral platforms.

Geographically the island lies in Tomini Bay off Central Sulawesi, Indonesia, and is accessible by boat from mainland ports in the region.

  • Setting: Volcanic island in Tomini Bay off the central Sulawesi coast, administratively part of Tojo Una-Una Regency.
  • Recreation: Known locally for coral reefs and scuba diving, with coastal reef sites surrounding the island.
Things to Do
When to Go

Best Time to Visit Una-Una

Best in the dry season when sea conditions are calm for the long boat rides from the mainland.

Dry season
Apr-Oct · 26-31°C
Calmer seas and clearer water make it the prime season for boat travel and diving.
Monsoon
Nov-Mar · 25-30°C
Rougher seas and irregular boat services; some resorts close for the season.

Weather & Climate near Una-Una

Climate

Una-Una's climate is classified as Tropical Rainforest - Tropical Rainforest climate with consistently warm temperatures year-round. Temperatures range from 22°C to 30°C. Heavy rainfall (2568 mm/year), wettest in June.

Air Quality: AQI 38 Good
Best Time to Visit
AugustSeptemberOctober
Temperature & Rainfall
Temperature Range
32°
Warmest Month
25°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Good 23° - 30° 26° 129 mm overcast 78% 1.9 m/s 2.4 extreme 12.0h
February Good 23° - 30° 26° 150 mm overcast 77% 1.9 m/s 2.5 extreme 12.0h
March Good 22° - 30° 26° 149 mm overcast 77% 1.8 m/s 2.6 extreme 12.0h
April Good 23° - 30° 27° 237 mm overcast 78% 2.0 m/s 2.5 extreme 12.0h
May Good 23° - 30° 26° 310 mm partly cloudy 78% 1.8 m/s 2.3 extreme 12.0h
June Good 22° - 30° 26° 342 mm overcast 78% 1.9 m/s 2.0 extreme 12.0h
July Good 22° - 30° 26° 331 mm partly cloudy 76% 1.8 m/s 2.1 extreme 12.0h
August Very Good 22° - 30° 26° 218 mm partly cloudy 75% 2.0 m/s 2.4 extreme 12.0h
September Very Good 22° - 30° 26° 209 mm partly cloudy 73% 2.0 m/s 2.6 extreme 12.0h
October Very Good 23° - 30° 26° 179 mm partly cloudy 75% 1.8 m/s 2.5 extreme 12.0h
November Good 23° - 30° 26° 173 mm overcast 77% 1.8 m/s 2.3 extreme 12.0h
December Good 23° - 30° 26° 141 mm overcast 78% 1.8 m/s 2.2 extreme 12.0h
Getting There & Around

How to Get to Una-Una

Most visitors reach Una-Una by boat from Ampana on the Sulawesi mainland. Public ferries and private speedboats run seasonally; the trip can take several hours depending on sea conditions. Arrange onward transport from Ampana in advance.

Tips for Visiting Una-Una

  • Travel from Ampana: arrange a speedboat or public ferry - times vary and schedules are often informal.
  • Bring cash and basic supplies; small island shops may have limited stock.
  • If diving, ask about recent eruption history and local dive briefings; currents can be strong.