The overall outlook is very mixed in terms of weather. The centre of Vietnam remains hot and predominantly dry with infrequent rain expected, but increasing towards the end of the month. The south is firmly in the midst of the wet season with daily downpours to be expected whilst the north is well into summer mode with high temperatures and frequent rain the norm. Visitor numbers relatively remain low and the central beaches still promise a great deal of sunshine. Trekking is off the cards in most regions because of rain in the northern mountains and central highlands.
The north of the country remains in summer meaning you can expect plenty of hot weather as well as rain and at times storms (avg temp: 30 °C). Halong Bay and Hanoi are prone to heavy showers at this time of year, infact August is one of the wettest months of the year in Hanoi. The mountains to the north are also very wet with trekking unadvisable throughout the month.
The beaches of Hoi An and Danang are still the pick of the bunch with good weather expected throughout the month. Temperatures remain high and whilst still predominantly dry, rain is expected more frequently towards the end of the month (avg temp: 30 °C). Nha Trang is likely to see the best of the weather, although towards the end of the month it can become overcast at times. Hue is experiencing higher rainfall whilst to the west the Central Highlands are now very wet making adventure activities unadvisable.
The south is now firmly into its wet season, thankfully however this is unlikely to be severe; whilst the showers will be slightly heavier than in previous months you can still expect plenty of dry and bright daylight hours (avg temp: 29°C).
From mid-August, Green Turtle hatchlings can be observed emerging from the beaches on Con Dao and making their first steps to the sea.