Quick Summary: Hoi An weather closely tracks nearby Da Nang, with a warm dry season from around February to July and a wetter, flood-prone stretch from August to December. The best time to visit Hoi An is February to May, when the Ancient Town’s canals stay low and rainfall is at its lightest.
Hoi An’s Ancient Town sits right at the mouth of the Thu Bon River, and that low-lying position means the same rains that make the rice fields around it so green can also send river water straight into the old streets. Locals have learned to read the sky here for centuries, since the town’s famous lantern-lit lanes are also its flood zone.
Hoi An Weather at a Glance
- Hoi An weather has a dry stretch from roughly February to July and a wet, flood-prone stretch from August to December.
- Average temperatures run from about 22°C in January to 30°C in June.
- April is the driest month, with only around 7 rain days.
- December is the wettest month, with about 26 rain days and the highest risk of Thu Bon River flooding.
Best Time to Visit
The best time to visit Hoi An is February through May, when average temperatures sit in a comfortable 22–29°C range, rain days are at their lowest, and the river stays well within its banks for lantern-lit evening walks along the water.
Weather by Seasons
Hoi An’s dry season stretches from around February to July, with temperatures climbing from 22°C to a June peak of 30°C and rain days staying mostly under 20. The wet season, August through January, brings heavier and more frequent rain, peaking in October, November and December with roughly 24–26 rain days each month. Regional climate reporting for the Da Nang–Hoi An coast, summarized on Da Nang Fantasticity, puts average relative humidity in this part of central Vietnam at around 83–84%.
Daily Weather & Humidity Insights
Humidity stays high through the year, generally in the low-to-mid 80s percent, with the dampest air settling in during and after the autumn rains. Day-night temperature swings are moderate, usually 4–6°C, so evenings rarely get properly cool even in the dry season, though winter mornings (December–February) can feel noticeably crisper under overcast skies.
What to Wear and Pack
Breathable, lightweight clothing suits most of the year, along with sandals or water-resistant shoes for wet cobblestones on Ancient Town streets. Carry a small umbrella or rain poncho year-round, and pack a light jacket for cooler, cloudier days between December and February.
Essential Local Tips
- Explore the Ancient Town in the early morning or after 4pm during the hot months (May–August) to avoid both the midday sun and the biggest crowds around the Japanese Covered Bridge.
- Check flood forecasts before booking a stay in the Ancient Town from October to December; the Thu Bon River regularly rises over its banks, and some riverside streets and shops close for days at a time.
- Come in February or March to see the town’s lanterns reflected in calm river water, before the busiest spring holiday crowds and well ahead of the autumn flood season. See more things to do in our full Hoi An travel guide.
