Si Nan National Park
Park Mountainous park protecting river valleys, trails, and waterfalls
A mountain park in northern Thailand protecting forested ridges, waterfalls and limestone outcrops. Visitors hike trails, seek viewpoints and visit small village markets along the park roads.
Si Nan National Park is a protected mountainous area in northern Thailand centered on steep forested terrain and river valleys. It preserves upland forest, watershed areas and a network of trails and waterfalls frequented by local visitors.
Waterfalls, river valleys and ridge viewpoints provide the main reasons people visit, with hiking and nature observation the primary activities. Trails vary from short walks to longer treks into the park interior.
The territory was designated for protection under Thailand’s park system to conserve watershed forests and local biodiversity. Management has aimed to maintain natural habitats while providing basic visitor infrastructure.
The park is located in northern Thailand, within the uplands of the region and near the provincial town that gives the area its name; the surrounding landscape is mountainous with river valleys.
- Best season to visit: The cool, dry months are the most comfortable for hiking and viewing waterfalls; rainy season can make some trails slippery or impassable.
How to Get to Si Nan National Park #
Si Nan National Park is accessed from Nan town via provincial roads; expect a 1-2 hour drive depending on which entrance is used. Buses and vans connect Nan with small district centers; from there, local transport or hired motorbike taxis reach the park gates.
Tips for Visiting Si Nan National Park #
- If aiming for the higher-elevation trails, carry a torch and plan to start before noon-some trails can be muddy and overgrown.
- Visit the park office in the nearby district (Nan province) for updated trail maps and to register-some areas require permits.
- Bring binoculars for birding: hornbills and other montane species can be spotted on early-morning walks.
Best Time to Visit Si Nan National Park #
Si Nan National Park in northern Thailand-straddling Nan and Uttaradit provinces-is most pleasant between November and February when temperatures cool and trails dry.
Weather & Climate near Si Nan National Park #
Si Nan National Park's climate is classified as Tropical Savanna - Tropical Savanna climate with hot summers (peaking in April) and mild winters (coldest in December). Temperatures range from 13°C to 34°C. Abundant rainfall (1084 mm/year), wettest in September with a pronounced dry season.
January
January is mild with highs of 28°C and lows of 13°C. The driest month with just 3 mm and mostly sunny skies.
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February
February is mild with highs of 31°C and lows of 14°C. Almost no rain and mostly sunny skies.
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March
March is warm with highs of 33°C and lows of 18°C. Moderate rainfall (37 mm) and mostly sunny skies.
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April
April is the hottest month, feeling like 29°C. Regular rainfall (88 mm).
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May
May is warm with highs of 32°C and lows of 22°C. Significant rainfall (176 mm) and mostly overcast skies.
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June
June is warm with muggy conditions (dew point 22°C). Significant rainfall (125 mm) and mostly overcast skies.
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July
July is warm with muggy conditions (dew point 22°C). Significant rainfall (146 mm) and mostly overcast skies.
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August
August is warm with muggy conditions (dew point 23°C). Significant rainfall (193 mm) and mostly overcast skies.
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September
September is warm with muggy conditions (dew point 22°C). The wettest month with heavy rain (199 mm) and mostly overcast skies.
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October
October is warm with highs of 29°C and lows of 20°C. Regular rainfall (85 mm) and partly cloudy skies.
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November
November is mild with highs of 28°C and lows of 17°C. Light rainfall.
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December
December is mild with highs of 26°C and lows of 13°C. Almost no rain and mostly sunny skies.
