Hoi An in February to August: weather trade-offs, crowds and what to book first

The numbers, from two separate datasets

Vietnam Tourism's national travel site publishes monthly averages for the Hoi An-Da Nang region: February sits at a 26°C high and 19°C low with 32 mm of rain, April reaches 31°C with 48 mm, and June-August holds a 34°C high with 104-142 mm. A second dataset, long-term station data from the Vietnam Institute for Building Science and Technology (IBST) via the Da Nang station about 25 km away, reads the same months a touch cooler on average temperature: February 22.4°C, April 26.5°C, June 29.4°C, with rainy days rising from about 5 a month in spring to 11-12 in August. The two datasets measure different things (regional averages versus one station's average temperature), so expect your days to land somewhere in that band rather than on one exact number.

February to April: the sweet spot

These are the most comfortable months. Days run 26-31°C, nights 19-23°C, rain is rare and humidity is at its lowest for the year, which makes walking the old town genuinely pleasant. Crowds are medium, the monthly lantern night on the 14th of the lunar month runs on schedule, and An Bang Beach is calm and swimmable. If your dates are flexible, March and April are the pick.

May to August: hot, bright, busy

The heat builds through May and peaks June-August at around 33-34°C with high humidity. Afternoon thunderstorms appear from late summer, but they are usually short bursts, not washouts. This is the best beach window: An Bang and Cua Dai are at their finest May-July, with warm calm water, and the Cham Islands boat season runs March-September. The trade-off is crowds: July and August are Vietnam's domestic summer holidays and the busiest months of the year in Hoi An. Plan sightseeing for early morning and evening, and treat 11 am to 3 pm as pool, spa or cafe time.

What sits outside this window

September turns wetter, and October-November is the flood season, when the riverside old town can go under water for days and lantern nights get cancelled. That is a different trip entirely, and not one to book by accident.

What to book first

• Hotels for July-August and for full-moon lantern nights: well-rated homestays near the old town from about 820,000-855,000 VND a night sell out first in the domestic peak.
• Tailoring: a good suit or dress needs two to three fittings over as many days, so start on day one, not the last morning.
• Cham Islands boats (March-September season) and Ba Na Hills cable car tickets if you are combining Da Nang: both sell out on holiday weekends.
• Lantern-making workshops and cooking classes for groups: a day ahead is usually enough outside July-August, two days in it.

For costs in each season, see our Hoi An couple budget, and for a slow, heat-aware day plan, 3 days in Hoi An with parents. Getting there is covered in Da Nang to Hoi An transport combinations.