Una-Una
Island Volcanic island in Tomini Gulf, Central Sulawesi
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.
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.
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.
Best Time to Visit Una-Una #
Best in the dry season when sea conditions are calm for the long boat rides from the mainland.
Weather & Climate near Una-Una #
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.
January
January is warm with stifling humidity (dew point 24°C). Significant rainfall (129 mm) and mostly overcast skies.
Comfort
Weather
February
February is warm with muggy conditions (dew point 24°C). Significant rainfall (150 mm) and mostly overcast skies.
Comfort
Weather
March
March is warm with muggy conditions (dew point 24°C). Significant rainfall (149 mm) and mostly overcast skies.
Comfort
Weather
April
April is the warmest month with stifling humidity (dew point 24°C). Heavy rain (237 mm) and mostly overcast skies.
Comfort
Weather
May
May is warm with stifling humidity (dew point 25°C). Heavy rain (310 mm) and partly cloudy skies.
Comfort
Weather
June
June is warm with stifling humidity (dew point 24°C). The wettest month with heavy rain (342 mm) and mostly overcast skies.
Comfort
Weather
July
July is warm with muggy conditions (dew point 24°C). Heavy rain (331 mm) and partly cloudy skies.
Comfort
Weather
August
August is warm with muggy conditions (dew point 23°C). Heavy rain (218 mm) and partly cloudy skies.
Comfort
Weather
September
September is warm with muggy conditions (dew point 23°C). Heavy rain (209 mm) and partly cloudy skies.
Comfort
Weather
October
October is warm with muggy conditions (dew point 24°C). Significant rainfall (179 mm) and partly cloudy skies.
Comfort
Weather
November
November is warm with stifling humidity (dew point 24°C). Significant rainfall (173 mm) and mostly overcast skies.
Comfort
Weather
December
December is warm with stifling humidity (dew point 24°C). Significant rainfall (141 mm) and mostly overcast skies.
