About Mount Karthala
Mount Karthala is an active shield volcano that dominates the central highlands of Grande Comore (Ngazidja) in the Comoros archipelago. It is the country’s highest mountain and one of the largest active volcanoes in the region.
The summit area contains a large crater and volcanic slopes covered by montane forest and lava fields in places; periodic eruptions have produced lava flows and ash deposits that have altered the landscape. The volcano is of interest to scientists and experienced trekkers, though access and safety depend on current volcanic activity.
Mount Karthala sits near the interior of Grande Comore and is visible from the island’s coastal settlements, including the capital, Moroni. It is the dominant topographic feature of the island.
- Elevation: At about 2,361 metres it is the highest point of Grande Comore and of the Comoros archipelago.
- Volcanic activity: An active shield volcano with documented eruptions in the 20th and 21st centuries; volcanic activity periodically affects local communities and air quality.
Best Time to Visit Mount Karthala
Best visited in the dry season (May-October) for clearer views and safer trekking conditions.
Weather & Climate near Mount Karthala
Mount Karthala's climate is classified as Oceanic - Oceanic climate with consistently warm temperatures year-round. Temperatures range from 7°C to 19°C. Abundant rainfall (1916 mm/year), wettest in January with a pronounced dry season.
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | Acceptable | 11° - 19° | 15° | 347 mm | partly cloudy | 80% | 4.2 m/s | 2.6 extreme | 12.6h |
| February | Acceptable | 11° - 19° | 15° | 284 mm | partly cloudy | 80% | 3.5 m/s | 2.7 extreme | 12.4h |
| March | Good | 11° - 19° | 15° | 306 mm | partly cloudy | 79% | 3.6 m/s | 2.6 extreme | 12.1h |
| April | Good | 10° - 19° | 15° | 197 mm | partly cloudy | 78% | 5.0 m/s | 2.3 extreme | 11.7h |
| May | Very Good | 10° - 18° | 14° | 91 mm | some cloud | 77% | 4.7 m/s | 1.9 very high | 11.5h |
| June | Very Good | 8° - 17° | 13° | 70 mm | some cloud | 75% | 4.1 m/s | 1.7 very high | 11.3h |
| July | Very Good | 8° - 16° | 12° | 75 mm | some cloud | 75% | 4.4 m/s | 1.8 very high | 11.4h |
| August | Very Good | 7° - 16° | 12° | 45 mm | mostly sunny | 75% | 4.1 m/s | 2.1 extreme | 11.6h |
| September | Excellent | 8° - 17° | 12° | 29 mm | some cloud | 76% | 4.9 m/s | 2.4 extreme | 11.9h |
| October | Very Good | 8° - 18° | 13° | 71 mm | mostly sunny | 76% | 4.4 m/s | 2.6 extreme | 12.2h |
| November | Very Good | 9° - 19° | 14° | 137 mm | mostly sunny | 76% | 4.4 m/s | 2.7 extreme | 12.5h |
| December | Good | 10° - 19° | 15° | 264 mm | partly cloudy | 77% | 5.1 m/s | 2.7 extreme | 12.7h |
How to Get to Mount Karthala
Most visitors travel to Moroni (Prince Said Ibrahim International Airport) on Grande Comore and then arrange a local transfer to trailheads. Local guides and park authorities coordinate trekking and safety.
Tips for Visiting Mount Karthala
- Mount Karthala is an active volcano-check local advisories and flight schedules to Grande Comore before planning a trek.
- Hire local guides from Moroni and arrange transport and permits; trails can be muddy and the route unmarked in places.
- Bring warm clothing for summit nights-temperatures fall markedly above the forest line despite the tropical latitude.