Con Dao (Con Son) weather by month
The best time to visit Con Dao (Con Son) is February to April — 92/100 in March, 30°C and 2 rainy days. The best season is the dry season, December to April (85/100 on average).
The worst month is October at 56/100 — hot, soaked, clean air. See October →
Updated September 2026 · climate normals from ERA5 reanalysis
Planning the wider trip? Best time to visit Vietnam →
Best season: December to April (85/100 on average) · worst October (56/100)
- Days
- 30°C
- Nights
- 25°C
- Wet days
- 2
- Sun
- 11.1 h
- Humidity
- 84%
- Daylight
- 12 h
Con Dao, month by month
Comfort score out of 100 for the kind of trip Con Dao is best for, the average high, rainy days and hours of sun a day from the climate normals, and how busy it tends to be.
What's on in Con Dao through the year
Festivals, natural spectacles, holidays and the seasons to watch out for — curated and sourced. The month pages carry the detail.
Crowds in Con Dao in March
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Busyschool holidays in 2 of the markets that fill it, one of its best months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Good to know before you go to Con Dao
Real experiences from travellers' own write-ups, quoted with a link to the original.
practical
The one-hour flight from Ho Chi Minh City made Con Dao feel remarkably easy to reach given how untouched it still felt once we landed. We found a quiet stretch of clear, Caribbean-blue water near the airport close to Bãi Đầm Trầu, complete with natural shade and rocks to sit on, while Lò Vôi Beach further along had shallow, warm water that stayed thigh-deep for what felt like forever out from shore. We learned to plan beach time for late afternoon, around 4 or 5pm, when the sun softened and the crowds picked up in typical Vietnamese fashion. Sandflies caught us off guard on one beach, so we started checking with locals before settling in anywhere new. Seafood at a small spot in Con Son town beat every restaurant meal we'd had on the mainland.
Traveller notes on Con Dao
What people who have been say about the place — the year-round notes first, then month by month.
Forum posters consistently name March among the best months here, with sunny, warm weather and calm, clear seas typical this time of year - part of a broader dry season posters place roughly October through March for southern Vietnam generally, though some extend Con Dao's own good-weather window all the way to December. Posters are clear Con Dao runs its own genuine microclimate distinct from the mainland: forecasts based on general southern Vietnam conditions are often wrong for the island specifically, so posters recommend treating mainland weather apps as unreliable and instead checking conditions once actually on Con Dao or close to departure.
Con Đảo's forum places September inside southern Vietnam's June-through-October monsoon window, but posters were clear it's rarely a washout - the typical pattern is an hour or so of rain that clears back to sun, with some visitors reporting genuinely sunny, hot days and rain arriving mainly late in the evening or overnight. Mainland weather forecasts were repeatedly called unreliable for the island specifically, so posters recommended just watching the sky rather than trusting an app. Flexible plans matter more than picking an exact date within the month.
Add your own note from Con Dao's card on the map.