Hoi An, Vietnam · Records from 2006 to 2025. Not a forecast.
Mean high34°Hottest day 38.2° (2015)
Mean low26°Coldest night 21.7° (2006)
Rain days4 days0-9 by year
Rainfall86mmDaylight 12.7 → 13.0 h
Hoi An's 12 months iBest: January to March
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Trip typesBeach Goodwarm seaSightseeing on foot Poorhot and muggy
Humidity82%31 muggy days
Clear days4 days14 overcast days
Mean wind8 km/hRarely windy
Sea temperature27.8°27.4-28.2° by year (last 6)
Sunrise / sunset (15th)05:17 / 18:09Daylight 12.7 → 13.0 h
Hoi An in May
An Bang and Cua Dai have warm, calm water, which makes this the best time to swim. The sun is strong during the day, so sunscreen and a hat are essential. Wet days are few, so beach plans are easy to make.
May brought serious heat to Hoi An, 34°C on a typical afternoon and 26°C overnight. Early mornings were the best time to be outside. 4 rain days in a typical May: noticeable, but most days stayed dry. May could skip rain entirely: 2 of 20 years had none, while 2008 had 9 rain days.
Highs topped 30°C on 30 days of the month on average. Mixing in indoor stops at midday made sense. May 2015 averaged 36.0°C by day, 2.2°C above the 20-year mean. Each rainy day brought about 20 mm, closer to downpours than drizzle.
Typhoonsi No tropical storm passed within 300 km in this month over the last 20 years. Typhoons: July to December
Over the past 20 years May averaged 4 rain days (1 mm or more) out of 31. Individual years ran from 0 in the driest to 9 in the wettest.
What should I wear in Hoi An in May?
Days averaged 34°C and nights 26°C. Pack T-shirts, sunscreen plus a hat, a swimsuit, and insect repellent.
Can you swim in Hoi An in May?
Sea surface temperature averaged 27.8°C in May, warm enough to stay in for a long swim. Year to year it ranged 27.4-28.2°C. Check local flags for waves and jellyfish on the day.
Is May a good time to visit Hoi An?
On warmth and rain days alone, Hoi An's easiest months were January to March. May ranked 6 of 12.
Is Hoi An humid in May?
Mean relative humidity was 82%, with about 31 muggy days (dew point of 20°C or more) in the month.