Thailand has three seasons, not the usual four: hot, cool, and wet. The hottest and driest months are usually April and May, while the monsoon season (complete with heavy rains and choppy seas) depends on which side of the country you're on.
Let’s break it down:
The Gulf of Thailand Islands
Koh Tao, Koh Samui, and Koh Phangan are like hidden gems on the map that have been stealing hearts for over two decades. Here at Coral Grand Divers, we’re lucky to call Koh Tao, the smallest of the three, our home! These islands are the ultimate destination for those looking for sun, sea, and a touch of island magic all year long. Now, when it comes to the monsoon season, the Gulf Islands have their own vibe. The rains typically start rolling in around early November, peak towards the end of the month, and then ease up by late December or early January. But don’t worry ; it’s still warm here and it doesn’t rain all the time, but if you’re looking for endless sunshine and a perfect tan, this might not be the best time to visit. That said, don’t let the rain stop you ; if scuba diving in Koh Tao is on your list, some of the dive sites are well sheltered from the rough waves, so you can still dive in and explore the underwater world!
The Andaman Side - South-West Thailand
Over on the Andaman side (think Phuket, Koh Phi Phi, Krabi, and more), the monsoon brings a steady stream of moisture from the Indian Ocean, usually starting in June and sticking around until October. Sometimes, it even starts as early as April or May. And when it hits, you’ll get to experience the full force of tropical storms! Think big waves and heavy rain pretty much every day. September is typically the wettest month, and many island resorts actually shut down during the monsoon. Boat trips can get canceled due to rough weather, and those that do still go out? Well, they might be a bit... bumpy! So, if you're after calm seas and perfect weather, this might not be the best time for an Andaman adventure.
The Eastern Islands - Koh Chang, Koh Kood, Koh Mak
On the eastern side of Thailand, islands like Koh Chang, Koh Kood, and Koh Mak experience a strong monsoon season. The rains typically start around May and intensify through the peak months of July, August, and September. By November, the weather starts to calm down. During the monsoon, the seas can get rough, and strong winds can make water activities tricky and dangerous. Swimmers and divers should exercise caution, as the choppy waters can pose a risk.
The Central Plains (Bangkok, Ayutthaya)
In the Central Plains, including Bangkok and Ayutthaya, the rain tends to be more intermittent, with the wettest months typically being August and September. While you might get occasional downpours, flooding is more common in Bangkok during September, particularly in low-lying areas. It’s always a good idea to check the weather forecast before you go, as rain can sometimes come unexpectedly and heavy. Even though the rain can be a bit of a nuisance, it usually doesn’t last long, and you can still enjoy exploring the city’s cultural sites and vibrant street life between showers.
The North - Chiang Mai, Chiang Rai, Pai
The monsoon season in Northern Thailand runs from May to November, with the heaviest rains typically falling between July and September but hey, this is the perfect time for nature lovers, as waterfalls are at their most impressive. It’s also considered the off-season, meaning you’ll encounter fewer tourists, but be prepared for muddy trails and the potential for flooding on less stable roads. If you enjoy trekking and exploring the lush greenery, the rainy season offers a different, quieter experience. Just be sure to bring sturdy footwear and check weather conditions before heading out!
Think positive! If you’re traveling during the rainy season in any of the destinations listed, don’t stress; you can always head to another part of Thailand since the monsoon doesn’t hit everywhere at once. Plus, the rain brings some awesome accommodation deals!
The weather in Thailand can be unpredictable. Some years, the Koh Tao monsoon lasts just a couple of weeks, while other times it lingers into January. You could even get lucky during the peak monsoon season and enjoy nothing but sunshine! On the other hand, don’t be surprised if you’re hit with unexpected downpours during what are supposed to be the driest months!
The trick is to flash your best smile, and embrace the rain when it comes. And when it all gets a bit too much? Just dive in! Wet to be wet, and it’s always better down there!
