You will need a valid passport and a Cambodian visa to enter Cambodia. Tourist and business visas are valid for one month from the date of entry into Cambodia. Cambodia offers on-line visa processing. Click here to apply. You may also apply in person at the Cambodian Embassy or consulate offices in your country
Tourists and business travelers may also obtain a Cambodian visa at the airports in Phnom Penh, Siem Reap, and at all major border crossings. Cambodian immigration officials at airports now collect fingerprints upon entry using an inkless, electronic process. You will need two passport-sized (4cm by 6cm) photographs and a passport valid for a minimum of six months beyond the date of entry into Cambodia.
If you remain in Cambodia beyond the date of your authorized stay, Cambodian immigration officials will impose a fine of $10 per day overstayed. In cases of excessive overstays, you may be arrested for violating immigration laws, and detained as you undergo official deportation proceedings at your own expense. Deportation from Cambodia may result in your being prohibited from reentering Cambodia in the future.
Kingdom of Cambodia is blessed with one of Asia's simpler weather systems. The country has two distinct weather seasons, but you can travel in Cambodia all year round. In general, the entire country is subject to the same weather patterns, mainly due to the relatively uniform altitude and latitude throughout Cambodia.
There are two distinct seasons – dry (October to late April) and wet (May to late September). Within each season there are variations in temperature, with the final few dry months leading up to the wet season (March and April) and the early months of the wet season (May and June) usually being the hottest of the year with temperatures in excess of 35°C at times.
Humidity is at its highest during March and April whilst the coolest months of the year tend to be between October and December, however this is cool for Cambodia but far from chilly with average temperatures hovering around 24°C-26°C.
The best time to visit Cambodia depends on the heat, rainfall and number of tourists. Most travelers visit Cambodia from November to March. If you prefer to dodge the crowds and go when prices are lower, the best time to visit Cambodia is from May to early October.
There are no direct flights to Cambodia from Europe, North America, Australasia or South Africa, so if you plan to fly into the country you’ll need to get a connecting flight from elsewhere in Southeast or East Asia.
There are direct flights to Phnom Penh from an increasing number of cities in the region including Kuala Lumpur, Singapore, Seoul, Bangkok, Vientiane, Ho Chi Minh City, and several cities in China (including frequent connections with Hong Kong). Alternatively, it’s also possible to fly direct to Siem Reap from Singapore, Bangkok, Ho Chi Minh City, Kuala Lumpur and a number of other Asian destinations.