Chaweng Beach Weather in December

Chaweng Beach in December sees high temperatures, with highs around 29°C (84°F) and overnight lows of 26°C (79°F). Rainfall is fairly high at around 150 mm (5.9 in) on average, so pack waterproofs just in case.

Rainfall in Chaweng Beach in December

Historically, the month has about 14 days of rain, averaging 150 mm (5.9 in) in total. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Chaweng Beach in December

December in Chaweng Beach brings high temperatures, with highs of 29°C (84°F) and nights 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 Chaweng Beach in December

The area enjoys a moderate level of sunlight, with around 177 hours. It's a good balance between sunny and cloudy days.

Average water temperature in December

At 29°C (84°F), the water is very warm — more like a heated pool than the sea. Great for those who like warm water, though some may find it less refreshing on a hot day.

If you prefer dry days with pleasant temperatures, January and February typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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Check the conditions for any month of the year.

• January
• February
• March
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• May
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For a detailed overview over the year and the best time to visit Thailand, check out our Chaweng Beach's climate page.

Chaweng Beach Temperature in December

Min Temperature 26°C (79°F)  

Max Temperature 29°C (84°F)  

Water Temperature 29°C (84°F) *  

Chance of Rain 46%  

Precipitation 150 mm (5.9 in)  

Rainy days 14 days  

Humidity 82% *  

Sunshine 177 hours *  

Percentage Sunshine *  

* Data from: Koh Samui, Thailand (13 KM, 8 Miles).

Daily Historical Temperatures

48-year average (1976-2025)

Based on our historical records, temperatures in Chaweng Beach typically stay consistent throughout December, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 25°C (77°F).

Average temperatures in December

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Daily Historical Precipitation

48-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in December

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Historical weather for Chaweng Beach in December

Browse day-by-day weather records for Chaweng Beach spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Chaweng Beach historical weather extremes in December

Based on weather observations in Chaweng Beach between 1986 and 2025, these are the recorded extremes during December.

• The hottest December day on record in Chaweng Beach reached 34°C (93°F) (December 11, 2023).
• On December 25, 1999, Chaweng Beach saw its coldest December day with temperatures maxing out at 24°C (75°F).
• The coldest night in December in Chaweng Beach was on December 21, 1999, with a minimum of 20°C (68°F).

What to Wear in Chaweng Beach in December

Warm weather calls for comfortable, breathable clothing in December. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. With water temperatures around 29°C (84°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Chaweng Beach in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

7/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Thailand, check out our Chaweng Beach's climate page.

More climate data for Chaweng Beach

Temperature Rainfall Sunshine Humidity Water Temp

See the full Chaweng Beach climate overview or explore weather in Thailand.