It’s hard to give general weather forecast for a country with over 2000 miles of coastline and 3 totally different weather syetems plus, when you are having the time of you life ,who cares about a little rain ?
If you don’t have the luxury of choosing when to go and your travel period is dictated by time off from work then don’t worry ,most activities can be arranged around the weather.
If you do get to decide when you will be visiting vietnam then make a list of things that are important for your itinerary and then decide what time would best suit you – for example if you really want to go hiking then avoid the very wet season and so on.
Far North (Sapa , Ha Giang..)
The mountainous far North of VietNam is divided into tow distinct seasons ; the dry season runs from october to the and of march and the wet season from april to september.
If you are heading North to trek through the spectacular surroundings then best time to go is september to November or Marach to May . During these periods you can expect daytime temperatures between 15C and 28C and night temperatures from 10C to 18C.
December and january tend to have good trakking weather but can get very chilly at night , worth bearing in mind if cold then layers are key to keeping warm and a waterproof jacket and gaiters keep you dry.
North ( HaNoi, HaLong bay, Ninh Binh)
Nor thern VietNam has definitive winter and summer seasons . The winter season from November to April is cool but mostly dry with temperatures averaging around 20C but dropping to as low as 17C between the months of january and march.
The summer season is hot wet and humid with the highest rianfall bet july and september .In extreme cases this weather can prevent some tourist típ taking place , this is especially thue with the Halong Bay cruises.
Central Coast ( Hoi AN , Hue ,Nha Trang)
The center of VietNam is generally hot and dry from the middle of january to the end of august with temperatures averaging around 35 C .Slightly further South is Nha Trang which generally has a slightly longer season from january to September.
The wet season is between october and november ( early December in Nha Trang) with over half of the annual rianfall during these months ans some typhoons.
The central highlands ( the inland region of vietnam) have theif own distinct weather patterns . The best time visit is November to January when the tamperature is mild , around 10 C to 15 C but all of the flowers are blooming and the landscape is lush . February and march are also good tims to visit and the weather is slightly warmer.
Rainy season begins in April and the rain is almost constant from june to August tails off in September.
South ( HoChiMinh city , Mekong delta )
Temperatures remain fairly consistent yesr round with the main difference being the distinct wet and dry seasons. Dry season runs from November to early May and the wet season from may to November :June to August are generally the wettest months.
Far South ( Phu Quoc)
The beaches in the far south of vietnam usually have a bi – seasoned monsoon climate . The wet season runs from late july to late Ocber and the rest of the yesr is generally dry . December and January tend to be dry also fairly cold.