US citizens, and other members of the Organization of American States (OAS) do not need a visa. Visitors from all other EU states and Switzerland are also visa exempt. Visitors from these countries will be granted a stay of up to 90 days for tourist purposes on arrival. In order to enter St Kitts and Nevis you are required to have six months validity on your passport and possess a return ticket.
Health and Safety
There is no risk of Yellow Fever in St Kitts and Nevis, however a certificate is required to enter the country. If you do not possess this, you should seek a vaccine eight weeks before you travel. It is recommended that you also seek the following routine vaccinations before you travel: hepatitis A and B, MMR, and typhoid. If your vaccines are not up to date you should renew six to eight weeks before your intended travel date. You may wish to seek a rabies vaccination, although St Kitts and Nevis is presumed a rabies free destination. There is no malaria on the island, although some reports of Dengue fever. It is recommended to use mosquito repellent and cover up exposed skin in order to defend against insect bites.
St Kitts is an extremely safe country, and incidences of crime against tourists are rare. However, robberies on Conaree Beach have been reported, so usual precautions should be taken to look after valuables here. It is best to not carry large amounts of cash, jewelry, and your passport. Avoid walking alone in isolated areas, including beaches, at night. You should leave all valuables in the safe in your hotel. Crime on the island of Nevis is very rare.
Being in the tropics St Kitts and Nevis is at risk of violent storms, and hurricane season lasts from June to November each year. If travelling somewhere remote during this season, it is best to check weather reports or visit the US National Hurricane Center website: http://www.nhc.noaa.gov/.