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If you are used to spring, summer, autumn and winter, Southeast Asia's climate can seem baffling at first. In truth it is refreshingly simple, running mostly on a dry season and a wet (monsoon) season. This guide explains the difference so you can plan with confidence.
Across most of the region, the year splits into two.
On the mainland the dry season broadly runs November to April and the wet season May to October, but as we will see, the coasts and islands can flip this on its head.
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The word monsoon sounds ominous, but the reality is rarely a washout. In most places the rain arrives as a dramatic afternoon downpour that clears within an hour or two, leaving the rest of the day warm and bright.
The upside is considerable: vivid green landscapes, full waterfalls, thinner crowds and noticeably cheaper flights and hotels. Only a handful of months and regions see prolonged, trip-disrupting rain.
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Thailand is the perfect illustration. Its Andaman coast (Phuket, Krabi) is driest from November to April, while its Gulf coast (Koh Samui) is often driest from June to September.
So when one side is under cloud, the other is usually basking in sunshine. Knowing this lets you pick a beach that is in season whatever month you can travel.
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Head south towards the equator and the pattern shifts again. Bali and much of Indonesia enjoy their dry season from around April to October, exactly when parts of the mainland turn wet.
This is why a well-planned regional trip can effectively follow the sunshine, pairing the mainland's cool season with the islands' dry months for near-constant blue skies.
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You do not need to memorise every micro-climate. Remember two things: the mainland is at its easiest from November to March, and if you are travelling in the wetter months, simply steer towards whichever coast or island is currently dry.
Because our small-group departures are scheduled around these seasonal windows, the hardest part of the planning is already done for you.
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