Weather in Vũng Tàu in August

A hard month. August is a hard month in Vũng Tàu, and worth planning around. You should expect rain on 24 days of the month, which is more days wet than dry.

August ranks 10 of 12 — near the bottom of Vũng Tàu's year. January is the month that works, and the swing between the two is 39 points, which is a different holiday rather than a slightly better one.

Rain on 24 of the month's 31 days, 7 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Natural fibres and a second shirt for the day. At 87% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: 13 days top 30 °C — hot spells arrive, but they break; the day barely swings — 4.8 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest August day reached 32.2 °C and the coldest night fell to 22.7 °C, and the wettest single day dropped 76 mm — roughly 38% of the month's rain in one day.

August is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest August on record still delivered 298 mm against 104 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 199 mm average is a reasonable planning figure, not a promise.

Wind is light at 11.7 km/h, so the temperature on the page is close to the temperature on your skin, and humidity at 87% is the real story though — it is the number that decides how the day feels, not the 29.8 °C.

How August sits in the year

Temperatures hold steady either side: 29.8 °C in July, 29.8 here, 29.6 in September. Nothing about the timing within the month matters much.

Daylight in August

Vũng Tàu sits close enough to the equator that daylight barely moves all year — 12.5 hours in August, against a range of just 1.2 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 28.6 °C in August — warm enough that the water offers no relief from the heat. The sea peaks at 29.9 °C in May and bottoms out at 25.3 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

August in Vũng Tàu versus nearby

If Vũng Tàu is one option among several, the nearby comparison is worth making. Ho Chi Minh City is close enough to be a coin toss — within a degree on temperature, 2 days less rain. Cần Thơ is close enough to be a coin toss — within a degree on temperature, 1 day less rain.

So: August is a compromise. January is 32 points better and is what Vũng Tàu is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Vũng Tàu

See all twelve months in Vũng Tàu, or where else to go in August.