Best Time to Visit Khao Sok: Dry Season vs Rainy Season Guide
When to visit Khao Sok National Park
Khao Sok is green and beautiful all year, but the weather changes a lot between seasons. The dry months bring sunny days, drier trails and access to Nam Talu Cave. The rainy months bring lush jungle, fewer crowds and cheaper rooms. They also bring heavy downpours, leeches and some closures.
This guide covers month-by-month weather, what's open when and the best time for your trip.
- Rainfall figures differ by source. Weather2Travel gives about 20 mm for February and 409 mm for September. Visit Thailand Today (October 2026) gives about 33 mm and 450 mm. Both agree February is driest and September is wettest. I've used Weather2Travel's figures for the monthly table.
- Sources disagree on when the rainy season starts. Khaosok.com (updated 2023) says rain can fall from April to December, with the heaviest from June to November. Weather2Travel's data shows rainfall jumping in May. Visit Thailand Today calls May to November very wet.
- Sources disagree on tubing. Visit Thailand Today says river tubing and canoeing are only for the dry season, never after heavy rain. Couples Travel Stories says tubing is most popular when the water is high or after rain. Always check river conditions with your operator.
- Weather2Travel's "best month" scores are based only on temperature and sunshine, not rainfall. It rates December highest. Its own data shows December still gets about 89 mm of rain.
- Khaosok.com's temperature data is from 2019.
Khao Sok weather at a glance
| Season | Months | What to expect |
|---|---|---|
| Dry season | December to April | Sunny, drier trails, Nam Talu Cave open, busiest |
| Driest months | January to March | Least rain, best for hiking and the lake |
| Rainy season | May to November | Daily downpours, lush jungle, fewer crowds, some closures |
| Wettest month | September | Rivers can flood, some trails and caves close |
Khao Sok weather by month
| Month | Max °C | Min °C | Rainfall (mm) | Rainy days | Sunshine (hours/day) |
|---|---|---|---|---|---|
| January | 31.1 | 20.0 | 43 | 6 | 8 |
| February | 32.2 | 18.9 | 20 | 4 | 9 |
| March | 32.8 | 21.1 | 41 | 5 | 9 |
| April | 32.8 | 22.2 | 112 | 11 | 8 |
| May | 31.1 | 22.2 | 333 | 21 | 6 |
| June | 30.0 | 22.2 | 363 | 21 | 5 |
| July | 30.0 | 22.2 | 358 | 21 | 6 |
| August | 30.0 | 22.2 | 376 | 22 | 6 |
| September | 30.0 | 22.2 | 409 | 23 | 5 |
| October | 30.0 | 21.1 | 328 | 22 | 6 |
| November | 28.9 | 21.1 | 246 | 18 | 6 |
| December | 28.9 | 20.0 | 89 | 10 | 7 |
Data from Weather2Travel, converted to Celsius and millimetres. Driest month highlighted.
Dry season: December to April
The dry season brings calm water and clear skies
The dry season is the most popular time to visit. Visit Thailand Today calls December to April the best time, with drier trails. It says February is the driest month.
Pros:
- Nam Talu Cave is open. It's closed from June to November because of flash floods.
- Drier jungle trails and fewer leeches. Couples Travel Stories says leeches are rarely seen from December to April.
- Calmer lake water, which is better for swimming and kayaking.
- Better wildlife chances. Couples Travel Stories says February to May is the best time to see wild elephants at Cheow Lan Lake.
The giant Rafflesia flower blooms mainly from January to March
Rafflesia flowers: Wikipedia says the giant Rafflesia kerrii flower, which grows in Khao Sok, blooms mainly from January to March. Each flower lasts only about a week.
Cons:
- Busiest time. Visit Thailand Today says raft houses are busiest from November to mid-April, so book ahead.
- Hottest in March and April, with highs of about 33°C.
- Waterfalls are lower. Khao Sok Jungle Hostel notes that waterfalls are seasonal and may be low in the dry season.
Rainy season: May to November
The jungle is at its greenest in the rainy season
The rainy season is wetter but still worth visiting. Khaosok.com says rain usually comes as a downpour for an hour or two, followed by sunshine. It rarely rains all day.
Pros:
- Lush, green jungle. Visit Thailand Today says the forest is at its greenest.
- Fuller waterfalls.
- Fewer crowds and lower prices. Khaosok.com says guesthouses often offer discounts, especially in May, June, September and October.
- Slightly cooler, with highs around 30°C.
Waterfalls are at their fullest after the rains
Cons:
- Nam Talu Cave is closed from June to November.
- Leeches. Wear leech socks on jungle trails.
- Some trails and caves may close. Khaosoknationalpark.org says rangers can close vulnerable trails after heavy rain, especially in September and October.
- Flooding risk. Visit Thailand Today says flash floods closed Route 401 near the park in September 2026.
Best time for each activity
February to May is the best time to spot wild elephants
| Activity | Best months | Why |
|---|---|---|
| Nam Talu Cave | December to May | Closed June to November |
| Jungle hiking | January to March | Driest trails, fewest leeches |
| Cheow Lan Lake overnight | December to April | Calmer water, clearer skies |
| Wildlife spotting at the lake | February to May | Best chance of elephants (Couples Travel Stories) |
| Rafflesia flower | January to March | Main blooming season |
| Waterfalls | May to November | Fuller water flow |
| Budget travel | May, June, September, October | Discounts on rooms |
Month-by-month summary
- January: Dry and sunny. A great all-round month.
- February: The driest month. Best for hiking and Nam Talu.
- March: Dry but hot. Good for the lake.
- April: Hottest month. Rain starts to increase.
- May: Rainy season begins. Still a good chance of elephants.
- June: Wet. Nam Talu closes. Fewer crowds.
- July and August: Wet, but Visit Thailand Today says raft houses get busy again.
- September: The wettest month. Expect closures and flooding risk.
- October: Still very wet. Room discounts are common.
- November: Rain eases. Raft houses start getting busy.
- December: Drier and cooler. Raft houses are busy.
Tips for Malaysian travellers
- Plan school holiday trips early. Khaosok.com says school holidays bring bigger crowds.
- For a quieter trip, go in May, June, September or October. Pack for rain.
- Pack a poncho or rain jacket in any season. Rain can fall at any time.
- Bring leech socks from May to November.
- Book raft houses early for December to April.
Common mistakes to avoid
- Booking Nam Talu Cave between June and November.
- Going tubing after heavy rain.
- Expecting no rain in the dry season. Khaosok.com says Khao Sok has no fully dry season.
- Not checking road conditions in September and October.
Sourced from Weather2Travel Khao Sok Climate, Weather2Travel Best Time to Visit Khao Sok, Visit Thailand Today Khao Sok Guide, Khaosok.com When to Visit, Couples Travel Stories Khao Sok Guide, Couples Travel Stories Wild Elephants, Khao Sok National Park Hours and Fees, Khao Sok Jungle Hostel 3D2N Lake Tour and Wikipedia Rafflesia kerrii.