How to use the weather map: Click the weather icon on the map, you can get a 4 days weather forecast!
The climate of Vietnam varies considerably from region to region. Although the entire country lies in the tropics and subtropics, local conditions vary from frosty winters in the far northern hills to year-round, subequatorial warmth in the Mekong Delta.
When to visit Vietnam: When it comes to weather, it's a tough call, as Vietnam's climate is so diverse. Think frosts and occasional snow in the mountains of the north, and temperatures soaring to 40oC in the south during the dry season.
Vietnam's weather is dictated by two monsoons, meaning double trouble on the rain front. The winter monsoon comes from the northeast between October and March, bringing damp and chilly winters to all areas north of Nha Trang, and dry and warm temperatures to the south. From April or May to October, the summer monsoon brings hot, humid weather to the whole country except for those areas sheltered by mountains. For the best balance, we'd vote for the months of April, May or October. For those sticking to the south, November to February is dry and a touch cooler. From July to November, violent and unpredictable typhoons hit central and northern Vietnam, which can dampen the spirits of even the most enthusiastic traveller.
It gets pretty crowded from November to March and in July and August during high season. Domestic tourists are a major force now and they tend to travel in numbers during July and August as well. Prices peak over the Christmas and New Year period, and if you don't fancy sharing the sites with the masses, try to avoid this busy time. May, June and September are usually the quietest months.
Some travellers like to time a visit with Tet (Vietnamese New Year), the biggest festival in the calendar, which falls in late January or early February. It's a nice idea in principle, but not in practice, as the whole country is on the move and prices rise dramatically. Transport is crammed in the runup and aftermath, the Reunification Express shuts down during festivities, and most shops and businesses are closed for the best part of a week.