Koh Samui Weather in November
November in Koh Samui typically sees daytime highs of 29°C (84°F) and nighttime lows of 26°C (79°F). Rainfall is also possible this month, so it's worth packing an umbrella.
Rainfall in Koh Samui in November
Looking at the last 30 years, the data shows about 19 days with rain, averaging 294 mm (12 in) for the month. Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.
Temperature in Koh Samui in November
If you're visiting Koh Samui in November, expect highs of 29°C (84°F) and overnight lows around 26°C (79°F). Overall, the month follows a fairly predictable daily temperature pattern. With lows of 26°C (79°F), it stays warm throughout the night. A cold shower before going to sleep is one of the easiest ways to cool down before bed.
Sunshine in Koh Samui in November
With about 175 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.
Average water temperature in November
The water is 29°C (84°F) — very warm by most standards. Comfortable to swim in, but not particularly refreshing if you're looking to cool off.If you prefer dry days with pleasant temperatures, November may not be the ideal month to visit Koh Samui. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Thailand, check out our Koh Samui's climate page.
Koh Samui Temperature in November
Min Temperature
26°C (79°F)
Max Temperature
29°C (84°F)
Water Temperature
29°C (84°F)
Chance of Rain
63%
Precipitation
294 mm (12 in)
Rainy days
19 days
Humidity
85%
Sunshine
175 hours
Percentage Sunshine
Daily Historical Temperatures
47-year average (1976-2025)
Based on our historical records, temperatures in Koh Samui typically stay consistent throughout November, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in November
Daily Historical Precipitation
47-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in November
Historical weather for Koh Samui in November
Browse day-by-day weather records for Koh Samui spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Koh Samui historical weather extremes in November
According to our 33 years of weather records for Koh Samui, the following extremes were recorded between 1992 and 2025.
- Koh Samui recorded its highest November temperature of 35°C (95°F) on November 13, 2019.
- The coldest November day was on November 4, 2000, with a maximum of 25°C (77°F).
- Nighttime temperatures dropped to 21°C (70°F) on November 27, 1993, marking the coldest November night on record.
Best Places in Thailand in November
Find out more about the weather in Thailand and which places have the best travel conditions in this month. See all of Thailand in November →
perfect weather
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tolerable
unpleasant
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What to Wear in Koh Samui in November
Warm temperatures in November make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! The water temperature sits at about 29°C (84°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Koh Samui in November
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Thailand, check out our Koh Samui's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Koh Samui climate overview or explore weather in Thailand.
