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Pmcalara CC BY-SA 4.0 Wikimedia Commons

Mount Isarog

Mountain

In the Bicol Region, Mount Isarog sits inside Isarog Natural Park, known for rainforest trails, waterfalls and endemic species; hikers and nature observers visit for multi-day treks and biodiversity.

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In this guide

Mount Isarog essentials

Country: Philippines
Driest months: Feb-Apr
Pay in: Peso (₱)

Mount Isarog at a Glance

About Mount Isarog

Mount Isarog is a forested stratovolcano in the Bicol Region of the Philippines that is designated as a protected natural park. It is recognized for its biodiversity and intact montane forest cover.

Hikers use marked trails to reach the summit through primary and secondary forest, and the mountain is an important watershed and refuge for endemic species. Visitor access is managed by park authorities under the natural-park designation.

The volcano sits on the island of Luzon within Camarines Sur province, with the city of Naga and other regional towns providing the usual access points to the park.

  • Protected status: The area is protected as a natural park to conserve montane forest and endemic species, so established trailheads and park regulations govern access to the summit.
When to Go

Best Time to Visit Mount Isarog

Dry season offers safer trail conditions and clearer weather for views.

Dry season
November-May · 20-28°C
Drier trails and clearer summit attempts; hot at lower elevations, cool near the summit.
Wet season
June-October · 22-30°C
Heavy rains and slippery approaches; crater lakes swell.

Weather & Climate near Mount Isarog

Climate

Mount Isarog's climate is classified as Oceanic - Oceanic climate with consistently warm temperatures year-round. Temperatures range from 13°C to 24°C. Heavy rainfall (3399 mm/year), wettest in November.

Air Quality: AQI 51 Moderate
Best Time to Visit
AprilMarchMay
Temperature & Rainfall
Temperature Range
37°
Warmest Month
20°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Acceptable 14° - 21° 17° 239 mm overcast 84% 3.7 m/s 1.6 very high 11.3h
February Good 13° - 21° 17° 148 mm partly cloudy 81% 3.7 m/s 2.0 very high 11.6h
March Very Good 14° - 22° 18° 162 mm partly cloudy 79% 3.3 m/s 2.2 extreme 11.9h
April Very Good 15° - 23° 19° 155 mm some cloud 74% 3.1 m/s 2.5 extreme 12.3h
May Very Good 16° - 24° 20° 237 mm partly cloudy 75% 2.7 m/s 2.3 extreme 12.6h
June Good 16° - 23° 20° 281 mm partly cloudy 80% 2.8 m/s 2.2 extreme 12.8h
July Good 16° - 23° 19° 344 mm overcast 83% 2.6 m/s 2.1 extreme 12.7h
August Good 16° - 23° 19° 263 mm overcast 85% 2.9 m/s 2.1 extreme 12.4h
September Good 16° - 23° 19° 315 mm overcast 85% 2.7 m/s 2.1 extreme 12.1h
October Good 16° - 22° 19° 395 mm overcast 84% 2.3 m/s 1.8 very high 11.7h
November Good 15° - 22° 19° 440 mm overcast 85% 3.4 m/s 1.6 very high 11.4h
December Acceptable 15° - 21° 18° 420 mm overcast 86% 3.4 m/s 1.4 high 11.2h
Getting There & Around

How to Get to Mount Isarog

Isarog is accessible from Naga City (Bicol). Buses and jeepneys run to towns around the mountain where park offices and trailheads are located; local guides and DENR rangers coordinate trekking and camping permits.

Tips for Visiting Mount Isarog

  • If planning a multi-day trek, coordinate with local DENR rangers in Naga City or nearby municipalities for permits and trail info.
  • Monsoon season (June-October) makes lower slopes slippery; consider dry months for safer hiking.
  • Watch for endemic birdlife and the crater lake's changing levels after heavy rain.