Sai Yok National Park Park

National park in Kanchanaburi with waterfalls and caves

Sai Yok National Park in western Thailand draws visitors to waterfalls such as Sai Yok Yai, limestone caves, river rafting on the Kwai and jungle hiking around Kanchanaburi.

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Sai Yok National Park at a Glance#

Address: Sai Yok National Park, Kanchanaburi Province, Thailand

Hours: Daylight hours (park often managed locally; ranger station hours vary)

Admission: Entrance fees vary by park zone; day permits commonly required for non-residents (check local signage)

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How to Get to Sai Yok National Park#

Sai Yok National Park is approximately 100-130 km northwest of Bangkok (depending on route). The nearest major town is Kanchanaburi; visitors normally travel by car or book minibus tours from Kanchanaburi (roughly 1-1.5 hours) or Bangkok (2-3 hours). Local buses and tour operators run regular day trips.

Tips for Visiting Sai Yok National Park#

  • Visit early in the morning to catch waterfalls and avoid the midday heat and day-tripper crowds.
  • Hire a licensed local guide for jungle trails and river crossings-weather and terrain can change quickly.
  • Bring mosquito repellent and dry bags for electronics if planning river activities.

Best Time to Visit Sai Yok National Park#

November-February (cool/dry) is the optimal time for hiking and waterfall viewing; rainy season offers dramatic flows but complicates access.

Cool/dry season
November-February · 18-28°C
Best for trails, waterfalls (water clearer), and cooler nights.
Hot season
March-May · 25-35°C
Hotter conditions; water activities attractive but midday hiking is uncomfortable.
Rainy season
June-October · 24-30°C
Lush jungle and swollen waterfalls, but some trails may be slippery or closed.

Weather & Climate near Sai Yok National Park#

Climate

Sai Yok National Park's climate is classified as Tropical Savanna - Tropical Savanna climate with hot summers (peaking in April) and warm winters (coldest in December). Temperatures range from 18°C to 36°C. Heavy rainfall (2290 mm/year), wettest in August with a pronounced dry season.

Air Quality: AQI 75 Moderate
Best Time to Visit
DecemberJanuaryFebruary
Temperature & Rainfall
Temperature Range
40°
Warmest Month
8°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Excellent 18° - 32° 25° 7 mm some cloud 70% 0.7 m/s 1.7 very high 11.3h
February Excellent 20° - 34° 27° 18 mm mostly sunny 64% 0.8 m/s 2.0 very high 11.6h
March Excellent 22° - 35° 31° 35 mm some cloud 64% 1.2 m/s 2.1 extreme 11.9h
April Very Good 24° - 36° 34° 87 mm partly cloudy 68% 0.9 m/s 2.3 extreme 12.3h
May Acceptable 24° - 33° 33° 264 mm overcast 81% 1.3 m/s 2.1 extreme 12.7h
June Acceptable 23° - 31° 30° 376 mm overcast 85% 1.1 m/s 1.9 very high 12.8h
July Good 23° - 30° 27° 396 mm overcast 86% 1.1 m/s 1.8 very high 12.8h
August Good 23° - 30° 26° 431 mm overcast 88% 0.9 m/s 1.8 very high 12.5h
September Acceptable 23° - 31° 27° 375 mm overcast 90% 0.7 m/s 1.9 very high 12.1h
October Acceptable 23° - 31° 27° 249 mm overcast 89% 0.6 m/s 1.9 very high 11.7h
November Very Good 21° - 31° 26° 48 mm partly cloudy 83% 0.7 m/s 1.9 very high 11.3h
December Ideal 18° - 31° 24° 4 mm some cloud 76% 0.8 m/s 1.7 very high 11.2h