Quick Summary: Chau Doc weather follows a dry season (roughly December–April) and wet season (May–November) pattern typical of the upper Mekong Delta, with the added twist of the seasonal Mekong flood, or mua nuoc noi, from around August to November. The best time for calm, dry conditions is December to February; the best time to see the flooded rice fields is September–October. April is the hottest month, averaging 29.2°C.
Perched on the Hau (Bassac) River right by the Cambodian border, Chau Doc’s weather is tied closely to the Mekong’s rise and fall — Sam Mountain, rising abruptly from the flat delta floor nearby, is one of the only spots for miles not shaped by the river’s seasonal flood.
Chau Doc Weather at a Glance
- Chau Doc weather peaks in April at 29.2°C and is coolest in January at 26.3°C.
- Dry season runs December–April, with rain days as low as 4 in January and February.
- Wet season runs May–November, with rain days reaching 29 in September.
- The town logs around 218 rain days a year, and its low-lying position along the Mekong means water levels — not just rainfall — shape the local weather story.
Best Time to Visit
December through February brings the driest, most comfortable Chau Doc weather, with only 4–5 rain days a month and average temperatures of 26.3–27.1°C — ideal for visiting Sam Mountain and the floating fish farms in calm conditions. If witnessing the dramatic mua nuoc noi flood season is the goal instead, September and October bring the highest water levels across the surrounding rice fields.
Weather by Seasons
Dry Season (December–April): Temperatures climb from 26.3°C in January to 29.2°C by April, with rain days rising from 4 to 13 as the season transitions. Water levels along the Hau River are at their lowest, and the floating villages sit closer to their permanent moorings.
Wet Season (May–November): Average temperatures ease to 26.7–28.6°C, while rain days climb to 19–29 per month, peaking at 29 in September. Per weather data on Kupi.com’s Chau Doc weather page, average monthly temperatures stay in a narrow 26.7–30.1°C band year-round, with the season’s real defining feature being rainfall and river level rather than temperature swings.
Daily Weather & Humidity Insights
Chau Doc’s proximity to the Mekong keeps humidity high for a delta town — typically 65–75% in the dry season, rising into the high 80s during the wettest months. Day-night temperature swings run moderate, usually 6–8°C, with nights cooling more noticeably during the dry season than the humid, cloud-covered wet months. Once the flood season sets in (roughly August–November), the extra surface water across the rice fields can make evenings feel a touch cooler and mistier than in town.
What to Wear and Pack
- Lightweight, breathable clothing for hot, humid delta days.
- A rain jacket or poncho for the May–November wet season, heavier still during flood season.
- Waterproof sandals or boots if visiting during mua nuoc noi, when paths near the fields can be wet or submerged.
- Sun protection for open-air boat trips to the floating fish farms.
- A light scarf or long sleeves for the climb up Sam Mountain, where temples call for modest dress.
Essential Local Tips
- Visit the floating fish farms and Cham fishing villages in the early morning, when the river is calmest and light is best for photos.
- During flood season (roughly August–November), check locally on which roads and paths are passable, since water levels can rise quickly after heavy rain upstream.
- Time a Sam Mountain sunset for the dry season, when clearer skies give the widest views across the rice fields and the Cambodian border. See more things to do in our our full Chau Doc travel guide.
