Cyclone season is normally between November and April but cyclones can occur throughout the year. Severe weather may result in flooding, landslides, and disruption to essential services and infrastructure. See Natural Disasters
There is no British diplomatic representation in Tonga. The British High Commission in Suva can provide routine consular assistance. In an emergency you can also contact the New Zealand High Commission in Nuku’alofa.
There is a low threat from terrorism. See Terrorism
Most visits to Tonga are trouble free. The crime rate is relatively low. However, petty crime and theft do take place. You should remain vigilant, especially at night. See Crime.
Take out comprehensive travel and medical insurance before you travel. Medical evacuation from Tonga is required for most non-basic medical problems. You should make sure that your policy covers you for medical evacuation by air ambulance.