Hoi An weather in August
Hoi An averages 34°C by day and 27°C at night in August, with the sea at 31°C and 18 days with at least 1 mm of rain. It cools by about 3°C into September.
Day
34°C
Night
27°C
Sea
31°C
Rainy days
18
Flight from London
12h
What August feels like
August is hot but wet in Hoi An: rainy season, so pack for showers.
The sea is warm at 31°C: comfortable for long swims.
It is rainy season, with rain on about 18 days.
Of the 48 sun destinations we track, Hoi An is the #10 warmest in August.
Want it warmer in August?
These are hotter than Hoi An this month for at most an hour and a half more flying:
Hoi An weather by month
August is highlighted. Compare with July and September, or see the full year in Hoi An.
Hoi An in August: quick answers
Is Hoi An hot in August?
August is hot but wet in Hoi An: rainy season, so pack for showers. Average highs are 34°C and lows 27°C.
Can you swim in Hoi An in August?
The sea is warm at 31°C: comfortable for long swims.
Does it rain in Hoi An in August?
It is rainy season, with rain on about 18 days.
What is the warmest month in Hoi An?
June, at an average high of 34°C. The coolest is January at 24°C.
How long is the flight to Hoi An from the UK?
About 12h direct from London, estimated from the 9,873 km distance. Check your airline for exact times.
Still choosing? See where is hot in August for every destination ranked by temperature, sea and flight time.
How we measured this
Averages of every day in August from 2016 to 2025, from the Open-Meteo historical weather archive (ECMWF ERA5 reanalysis). Sea temperature is the 2023 to 2025 average from the Open-Meteo marine archive. A rainy day has at least 1 mm of rain. Reanalysis describes an area about 25 km across, so sheltered resorts can run a degree or two warmer. Flight time is a distance-based estimate from London Heathrow.
Planning Hoi An in August?
Save the restaurants, beaches and views you find on TikTok and Instagram for Hoi An straight to a map, then let Dream Trip turn them into a day-by-day plan.
