Climate
| Climate | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| Daily highs °C | 31 | 32 | 33 | 35 | 33 | 32 | 32 | 32 | 31 | 30 | 30 | 30 |
| Nightly lows °C | 20 | 22 | 24 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 22 | 25 |
| Precipitation mm | 39 | 43 | 99 | 112 | 365 | 418 | 439 | 490 | 502 | 274 | 54 | 2 |
Ko Chang has the same seasons as Bangkok. The best season to go is the comparatively cool season between November and February. March to May are roasting hot and between June and October it rains, and a lot at that: 4,000 mm in an average year. Many guest houses close during this season, so accommodation is limited.
History
Prior to World War II, Ko Chang was little known by anyone. During this period, the few families there made a living growing coconuts and fruit on the mainland. In January 1941, during the Japanese occupation, the Thai Navy fought the French in a battle in the waters to the southeast of Ko Chang.
Nothing else happened to Ko Chang until the first backpacker foreigners started arriving on the back of local fishing boats in the mid-1970s. In 1982, Ko Chang along with surrounding area became part of the protected Mu Ko Chang National Marine Park. Only very recently, in less than ten years, Ko Chang has turned itself into a major tourist destination, both for foreigners and local Thais.
This sudden tourism boom however, has been fraught with controversy concerning land encroachment etc. The government is trying to "develop" it from a backpackers' paradise to a top-level destination, and construction work is going on throughout the island, with basic huts torn down to make way for fancy resorts.
Understand
Ko Chang is Thailand's second largest island, and the biggest in Eastern Thailand. With about 5,000 permanent residents the island is not heavily populated, but tourism and development has increased dramatically over the last few years.
Ko Chang is one of Thailand's most beautiful islands with long white sandy beaches, most half deserted. The island is also home to a wide range of wildlife, including a good selection of birds, snakes, deer and a number of elephants. The island and its vicinity are great places for snorkeling, diving and jungle hiking. The "discovery" of the island as a tourist destination since 2000 has brought on a large amount of rapid development, and while still far quieter than places like Phuket or Ko Samui, it's probably better to go now than later. Regarding services and activities specifically aimed at tourists prices have reached such a level that the islanders are pricing themselves out of the market when compared to the other islands.
Geography
Ko Chang is the largest island in the Ko Chang Archipelago. The name means Elephant Island, named for the elephant shape of its headland, although elephants are not indigenous to the island.
Ko Chang has an area of approximately 429 square kilometres. The topography contains high mountains and complex stone cliffs. The highest mount is Khao Salak Phet which is 744 metres high, rich in fertile evergreen forest which is the main water source. Therefore, there are many waterfalls, beaches and splendid reefs in the west of the island.
Most accommodation is located on the western side of the island, where the sandy beaches are. On the eastern side of the island there are no sandy beaches and this side is far less touristy. There are some nice waterfalls though.
70 percent of this undisturbed island is rainforest, steep hills, cliffs, waterfalls, and wildlife, fine beaches, coral reefs and an abundance of marine life. The island also offers tall mountains and rock cliffs.