#1Hot
Bangkok
- Day
- 30.5°C
- Sea
- 29.3°C
- Sun
- 3.0h
- Rain days
- 21
Your October weather guide
Weather in Thailand in October
October is a reasonable month for Thailand if warmth matters more than reliable sunshine, but it is a poor fit for a holiday built around dry beach days. Country averages put daytime temperatures at 29°C, with 25 rainy days and 2.3 hours of sunshine. Chiang Mai offers the best chance of fewer wet days among these destinations. The coastal options need more flexibility: expect warm weather, but leave room to change outdoor plans when it rains.
Long-term climate averages, not a forecast · 1991-2020
- Average daytime high
- 28.7°Cacross 6 destinations
- Average night-time low
- 24.1°Cafter dark
- Sea temperature
- 29.0°Cwarm enough to swim
- Rainy days
- 25days1 mm or more
Thailand, month by month
Turn up the warmth
Warmest places in Thailand in October
Ranked by average daytime high. The full comparison is in the table below.
#2Hot
Chiang Mai
- Day
- 28.9°C
- Sea
- -
- Sun
- 4.3h
- Rain days
- 16
#3Hot
Krabi
- Day
- 28.6°C
- Sea
- 29.1°C
- Sun
- 1.5h
- Rain days
- 29
#4Hot
Khao Lak
- Day
- 28.5°C
- Sea
- 28.7°C
- Sun
- 1.6h
- Rain days
- 29
#5Hot
Koh Samui
- Day
- 28.1°C
- Sea
- 29.1°C
- Sun
- 2.0h
- Rain days
- 26
#6Hot
Phuket
- Day
- 27.8°C
- Sea
- 28.9°C
- Sun
- 1.6h
- Rain days
- 28
Thailand destinations ranked for October
All 6 places we track in Thailand, ordered by daytime high.
Scroll sideways for more weather, down for more places. Click a heading to sort.
| # | Destination | ||||||
|---|---|---|---|---|---|---|---|
| 1 | Bangkok | 30.5°C | 24.1°C | 29.3°C | 3.0 h | 21 | 12 h 42 min |
| 2 | Chiang Mai | 28.9°C | 21.6°C | - | 4.3 h | 16 | 12 h |
| 3 | Krabi | 28.6°C | 24.0°C | 29.1°C | 1.5 h | 29 | 13 h 12 min |
| 4 | Khao Lak | 28.5°C | 24.0°C | 28.7°C | 1.6 h | 29 | 13 h 6 min |
| 5 | Koh Samui | 28.1°C | 25.6°C | 29.1°C | 2.0 h | 26 | 13 h 6 min |
| 6 | Phuket | 27.8°C | 25.2°C | 28.9°C | 1.6 h | 28 | 13 h 6 min |
6 destinations shownClimate averages, not a forecast.
October climate overview
Daytime highs across Thailand in October run from 27.8°C (Phuket) to 30.5°C (Bangkok). In Bangkok about 100% of October days reach 25°C. Nights average 24.1°C; the coldest 10% of nights in Phuket fall to 24°C or below.
Rainfall in October
Expect around 25 rainy days (1 mm or more) in October, with Chiang Mai the driest (16 days) and Khao Lak the wettest (29 days). The wettest October at Bangkok between 1991 and 2020 was 2020 with 476 mm; the driest was 2004 with 73 mm.
Sea temperature
The sea averages 29.0°C around Thailand in October - warmest at Bangkok (29.3°C). That is comfortable for swimming.
Sunshine and daylight
Around 2.3 hours of sunshine a day on average, out of 11.7 hours of daylight (sunshine estimated from cloud cover).
October against the rest of the year in Thailand
October is the 11th warmest month of the twelve in Thailand. It is 0.3°C cooler than September and 0.1°C warmer in November. The hottest month here is April (32°C) and the coolest December (29°C).
Which part of Thailand in October?
- Most sunshine: Chiang Mai, 4.3 h a day.
- Driest: Chiang Mai, about 16 rainy days.
- Warmest sea: Bangkok, 29°C.
- Hottest: Bangkok, 31°C by day.
- Coolest (better for walking and cities): Phuket, 28°C.
What to pack for Thailand in October
Based on the averages: summer clothes for the day; a rain jacket - roughly 25 wet days; swimwear - the sea is 29°C.
Similar weather elsewhere in October
Within 1.5°C of Thailand's October daytime average: Ho Chi Minh City (30°C), Montego Bay (30°C, sea 29°C), Kololi (30°C, sea 29°C), Hurghada (30°C, sea 27°C), Goa (30°C, sea 28°C). See the full ranking for October.
Chiang Mai is the better bet for fewer rainy days
Chiang Mai is the strongest October choice if you want to spend time outdoors without choosing the wettest option. It averages 16 rainy days, compared with 21 in Bangkok, so rain still needs a place in your plans. Daytime temperatures of 29°C mean it is not a cool-weather trip, though nights at 22°C offer more relief than elsewhere in this selection. Bangkok is hotter at 30°C by day and 24°C at night. Choose it if you are comfortable with warm evenings and can switch between outdoor and indoor plans. Neither destination promises dry weather, but both have fewer rainy days than the coastal choices listed here.
The coast is warm, but rain is the main catch
For a coast-focused trip, October asks for realistic expectations. Koh Samui has 26 rainy days, compared with 28 in both Krabi and Phuket and 29 in Khao Lak. That gives Koh Samui a slight advantage on this measure, not a strong case for dependable beach weather. Daytime temperatures range from 28°C in Koh Samui, Phuket and Khao Lak to 29°C in Krabi, so warmth is not the problem. The sea averages 29°C across these coastal destinations, making water temperature appealing, but that does not establish safe swimming conditions. Choose the coast if you can enjoy a stay with disrupted outdoor plans; choose Chiang Mai instead if fewer rainy days matter more than the sea.
A little more detail
Thailand in October FAQs
Plain answers, grounded in the averages.
Where is the hottest place in Thailand in October?
Bangkok is the warmest of the 6 places we track in Thailand in October with an average high of 30.5°C; Phuket is the coolest at 27.8°C.
Is the sea warm in Thailand in October?
The sea averages 22°C or more at Bangkok (29°C), Krabi (29°C), Khao Lak (29°C), Koh Samui (29°C), Phuket (29°C) in October.
What should I pack for Thailand in October?
Pack light clothing for the heat, rain protection and footwear that can cope with getting wet. Average nights stay warm at 24°C nationally. Chiang Mai is cooler at 22°C, while Koh Samui stays particularly warm overnight at 26°C.
How much warmer is Thailand than London in October?
Thailand averages 29°C by day, compared with 15°C in London, so expect a clear shift towards hot-weather clothing. The catch is that warmth does not mean clear skies: Thailand also averages 25 rainy days, making flexible outdoor plans important.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid), 1991-2020
Averages computed from daily values at 6 destination points.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C