Weather in Vietnam in August

August climate overview

Daytime highs across Vietnam in August run from 27.9°C (Phu Quoc) to 31.4°C (Hanoi). In Hanoi about 100% of August days reach 25°C. Nights average 25.2°C; the coldest 10% of nights in Phu Quoc fall to 25°C or below.

Rainfall in August

Expect around 27 rainy days (1 mm or more) in August, with Hanoi the driest (23 days) and Ho Chi Minh City the wettest (29 days). The wettest August at Hanoi between 1991 and 2020 was 2018 with 524 mm; the driest was 1992 with 165 mm.

Sea temperature

The sea averages 28.7°C around Vietnam in August. That is comfortable for swimming.

Sunshine and daylight

Around 1.8 hours of sunshine a day on average, out of 12.7 hours of daylight (sunshine estimated from cloud cover).

August against the rest of the year in Vietnam

August is the 5th warmest month of the twelve in Vietnam. It is 0.3°C cooler than July and 0.5°C cooler in September. The hottest month here is May (31°C) and the coolest January (26°C).

Which part of Vietnam in August?

• Most sunshine: Hanoi, 2.3 h a day.
• Driest: Hanoi, about 23 rainy days.
• Warmest sea: Phu Quoc, 29°C.
• Hottest: Hanoi, 31°C by day.
• Coolest (better for walking and cities): Phu Quoc, 28°C.

What to pack for Vietnam in August

Based on the averages: light, loose clothing and serious sun protection - midday highs sit around 30°C; a rain jacket - roughly 27 wet days; swimwear - the sea is 29°C.

Similar weather elsewhere in August

Within 1.5°C of Vietnam's August daytime average: Albufeira (31°C, sea 21°C), Hammamet (31°C, sea 27°C), Bangkok (31°C, sea 29°C), Montego Bay (31°C, sea 29°C), Orlando (31°C). See the full ranking for August.

Hanoi has the better rain outlook, but not cooler days

Hanoi is the stronger choice among these destinations if reducing your exposure to rain matters most. Its 23 rainy days still suggest a wet month, so this is a relative advantage rather than a promise of dry weather. Daytime temperatures reach 31°C in both Hanoi and Ho Chi Minh City, making lighter clothing and breaks from the midday heat sensible. Ho Chi Minh City has 29 rainy days, so outdoor plans need particularly generous room for change. Nights average 25°C in Hanoi and 24°C in Ho Chi Minh City: neither offers much of a cool-down. Choose Hanoi for the less rainy outlook, not because it will feel cooler during the day.

Phu Quoc offers warm water, not dependable beach weather

Phu Quoc is the coolest option here by day at 28°C, but that does not make it a dry-weather alternative. With 28 rainy days, it is better suited to travellers who can treat time by the sea as weather-dependent rather than the centre of a fixed schedule. The sea averages 29°C, so water temperature is unlikely to be the drawback; rain is the bigger catch. Warm water alone does not tell you about swimming conditions, so check local advice before entering. Nights remain warm at 26°C. Across Vietnam, average daily sunshine is only 1.8 hours, reinforcing the case for flexible outdoor plans rather than expecting long sunny spells.