Nha Trang
The best time for to visit Nha Trang is between February and October when air temperatures are between 25°C and 35°C, and water temperatures between 20°C to 25°C. Diving is pointless from late October to mid–December because the water is badly muddied by sediment ‘run-off’ caused by heavy rain.

Da Lat
Da Lat’s weather is much cooler than other places in the central and southern areas. Its dry season is very short – only the few months from December to March. Local people say that Da Lat experiences four seasons every day. Mornings tend to be chilly enough to wear sweaters. By mid-day, Da Lat’s altitude and proximity to the equator can make the sun unbearably hot. As the sun dips lower in the sky, the temperature becomes balmy and pleasant. When the sun sets, it gets downright cold. If you’re intending to visit Da Lat, take a warm jacket or pullover and always wear sun cream.

The Central Highlands
Inland, the weather on the Central Highland plateau is at its best in November, December and January. The landscape is green and verdant, flowers bloom profusely and the temperature hovers between 10°C and 15°C, on the chilly side, but comfortable. February and March are good as well, but hotter.

In some years, heat waves push the temperature into the high thirties, parching the landscape, causing brush fires, and creating drought conditions. The rain begins in April, and the weather steadily deteriorates into more or less continuous rain from June to August, and easing off in September.