Mount Ruang

Mountain Active volcanic island in the Sangihe archipelago

A steep volcanic island off North Sulawesi that rises directly from the sea. It draws mariners and researchers for its dramatic cone, fishing waters and periodic volcanic activity; landings are weather-dependent and facilities are minimal.

Main image
Ash Cloud Spreads Out From Ruang Volcano on 17-18 April.gif
Calon papan WikiLatih.jpg
COLLECTIE TROPENMUSEUM S.S. Van Overstraten van de KPM bij de Sangihe-eilanden TMnr 60018649.jpg
COLLECTIE TROPENMUSEUM Vulkaan op Poelau Roeang TMnr 60018638.jpg
COLLECTIE TROPENMUSEUM Vulkaan op Poelau Roeang TMnr 60018639.jpg
Gunung Ruang.jpg
Ruang Galeri Foto.jpg
Ruang Island, Tagulandang Island, North Celebes.jpg

Mount Ruang is a volcanic island and stratovolcano in Indonesia’s North Sulawesi province, part of the Sangihe volcanic arc. The volcano forms a steep conical island rising directly from the sea and is volcanically active.

Historical eruptions have produced explosive activity and local tsunamis, and the island is monitored for volcanic unrest. There are no large permanent settlements on the cone itself; nearby islands host local communities that are affected when activity occurs.

Ruang sits offshore of northern Sulawesi within the Indonesian archipelago; access to the island is by boat from nearby inhabited islands and coastal ports in North Sulawesi.

  • Volcanic island: A steep volcanic island in the Sangihe volcanic arc, it rises abruptly from surrounding seas and is notable for its active volcanic history and local tsunami-generating eruptions.
Mount Ruang
Mount Ruang (Ruang Island), North Sulawesi, Indonesia
2.3051, 125.3659

How to Get to Mount Ruang #

Access is by boat from nearby ports in North Sulawesi-charter boats from Ternate or other regional harbors. Sea conditions dictate feasibility; local operators provide the most reliable information and transport arrangements.

Tips for Visiting Mount Ruang #

  • If hiking, start early to avoid sudden tropical showers and to see seabird activity on the island's flanks.
  • Respect local signs and avoid landing on private or protected beaches without permission.
  • Check with local authorities for entry rules-some islands require permits or have seasonal restrictions for wildlife protection.

Best Time to Visit Mount Ruang #

May-September is generally the most reliable window for visiting and boating.

Dry season
May-September · 24-30°C (75-86°F)
Calmer seas and clearer skies-best for boat access and trekking.
Wet season
October-April · 24-30°C (75-86°F)
Heavy rains and rougher seas; visibility for diving and approach reduced.

Weather & Climate near Mount Ruang #

Climate

Mount Ruang's climate is classified as Tropical Rainforest - Tropical Rainforest climate with consistently warm temperatures year-round. Temperatures range from 22°C to 31°C. Heavy rainfall (2844 mm/year), wettest in January.

Best Time to Visit
AugustSeptemberApril
Temperature & Rainfall
Temperature Range
30°
Warmest Month
25°
Coldest Month
Monthly Conditions

January

January is warm with stifling humidity (dew point 24°C). The wettest month with heavy rain (324 mm) and mostly overcast skies.

65 Good

Comfort

26°
Feels Like Warm
26°C
Temperature
22° 29°
83%
Humidity
Very Humid

Weather

324 mm
Rainfall
1.8 m/s
Wind
Calm
2.3
UV Index
Extreme
11.9h daylight

February

February is warm with stifling humidity (dew point 24°C). Heavy rain (280 mm) and partly cloudy skies.

69 Good

Comfort

26°
Feels Like Warm
26°C
Temperature
22° 30°
82%
Humidity
Very Humid

Weather

280 mm
Rainfall
1.8 m/s
Wind
Calm
2.5
UV Index
Extreme
11.9h daylight

March

March is warm with stifling humidity (dew point 24°C). Heavy rain (259 mm) and partly cloudy skies.

69 Good

Comfort

26°
Feels Like Warm
26°C
Temperature
22° 30°
82%
Humidity
Very Humid

Weather

259 mm
Rainfall
1.9 m/s
Wind
Calm
2.7
UV Index
Extreme
12.0h daylight

April

April is warm with stifling humidity (dew point 24°C). Heavy rain (238 mm) and partly cloudy skies.

73 Very Good

Comfort

27°
Feels Like Warm
27°C
Temperature
23° 31°
81%
Humidity
Very Humid

Weather

238 mm
Rainfall
1.6 m/s
Wind
Calm
2.7
UV Index
Extreme
12.1h daylight

May

May is the hottest month, feeling like 30°C with oppressive humidity. Heavy rain (248 mm) and partly cloudy skies.

65 Good

Comfort

30°
Feels Like Hot
27°C
Temperature
23° 31°
82%
Humidity
Very Humid

Weather

248 mm
Rainfall
1.5 m/s
Wind
Calm
2.5
UV Index
Extreme
12.1h daylight

June

June is warm with stifling humidity (dew point 24°C). Heavy rain (227 mm) and partly cloudy skies.

69 Good

Comfort

27°
Feels Like Warm
27°C
Temperature
23° 31°
82%
Humidity
Very Humid

Weather

227 mm
Rainfall
1.7 m/s
Wind
Calm
2.2
UV Index
Extreme
12.1h daylight

July

July is warm with stifling humidity (dew point 24°C). Significant rainfall (161 mm) and partly cloudy skies.

71 Very Good

Comfort

26°
Feels Like Warm
26°C
Temperature
23° 30°
83%
Humidity
Very Humid

Weather

161 mm
Rainfall
2.1 m/s
Wind
Calm
2.3
UV Index
Extreme
12.1h daylight

August

August is warm with stifling humidity (dew point 24°C). Significant rainfall (136 mm) and partly cloudy skies.

77 Very Good

Comfort

27°
Feels Like Warm
27°C
Temperature
23° 31°
83%
Humidity
Very Humid

Weather

136 mm
Rainfall
2.5 m/s
Wind
Calm
2.6
UV Index
Extreme
12.1h daylight

September

September is warm with stifling humidity (dew point 24°C). Significant rainfall (176 mm) and partly cloudy skies.

75 Very Good

Comfort

27°
Feels Like Warm
27°C
Temperature
23° 31°
82%
Humidity
Very Humid

Weather

176 mm
Rainfall
2.2 m/s
Wind
Calm
2.7
UV Index
Extreme
12.0h daylight

October

October is warm with stifling humidity (dew point 24°C). Heavy rain (214 mm) and partly cloudy skies.

73 Very Good

Comfort

27°
Feels Like Warm
27°C
Temperature
22° 31°
80%
Humidity
Very Humid

Weather

214 mm
Rainfall
1.7 m/s
Wind
Calm
2.5
UV Index
Extreme
12.0h daylight

November

November is warm with stifling humidity (dew point 24°C). Heavy rain (275 mm) and partly cloudy skies.

69 Good

Comfort

26°
Feels Like Warm
26°C
Temperature
23° 30°
81%
Humidity
Very Humid

Weather

275 mm
Rainfall
1.7 m/s
Wind
Calm
2.3
UV Index
Extreme
11.9h daylight

December

December is warm with stifling humidity (dew point 25°C). Heavy rain (306 mm) and mostly overcast skies.

65 Good

Comfort

26°
Feels Like Warm
26°C
Temperature
22° 30°
82%
Humidity
Very Humid

Weather

306 mm
Rainfall
1.7 m/s
Wind
Calm
2.2
UV Index
Extreme
11.9h daylight

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