Piracy remains a significant threat in the Gulf of Aden and Indian Ocean. See Sea travel
Crime levels are rising and there has been an increase in burglaries and opportunist thefts against residents, expatriates and tourists. You should take sensible precautions to safeguard yourself and your possessions. Parked cars, residential accommodation including guest houses and hotels, beaches and walking trails may be targeted. See Crime
Caution should be exercised when swimming, especially with children. Currents can be strong and drownings occur. See Swimming
Some UK networks don’t allow roaming in Seychelles. You can buy local SIM cards in Victoria. You should check with your UK service provider to make sure that you can use a different SIM card in your phone before you travel.
Most visits to Seychelles are trouble-free.
Although there is no recent history of terrorism in the Seychelles, attacks can’t be ruled out. See Terrorism
If you’re abroad and you need emergency help from the UK government, contact the nearest British embassy, consulate or high commission.
Take out comprehensive travel and medical insurance before you travel.
Source Article from https://www.gov.uk/foreign-travel-advice/seychelles