Health in Sri Lanka: vaccines, dengue and drinking water

For Sri Lanka, the UK's TravelHealthPro says all travellers should be up to date with routine vaccines, and lists tetanus for most. The US CDC recommends typhoid for most travellers, and hepatitis A if unvaccinated. Sri Lanka has been malaria-free since 2016, but dengue is a risk all year. See a travel clinic before you go (checked October 2026).

This guide sets out what the official health agencies say, with the date we checked. It is not medical advice: a doctor or travel clinic can tell you what fits your health and your plans.

Which vaccinations do you need for Sri Lanka?

The two main sources disagree on some details, so here is each one.

United Kingdom. The UK's official travel health service, TravelHealthPro, says all travellers to Sri Lanka should be up to date with routine UK vaccines, including MMR (measles, mumps and rubella). It lists tetanus for most travellers. For some travellers, depending on their plans, it lists hepatitis A, hepatitis B, typhoid, rabies, Japanese encephalitis, cholera, chikungunya, dengue and tuberculosis (BCG) (checked 5 October 2026).

United States. The Centers for Disease Control and Prevention (CDC) recommends routine vaccines, including MMR, before every trip. For Sri Lanka it recommends hepatitis A for unvaccinated travellers aged one year or older, typhoid for most travellers, and hepatitis B for unvaccinated travellers under 60. It recommends Japanese encephalitis and rabies vaccines only for some travellers, and says chikungunya vaccination is generally not recommended (page last reviewed 25 August 2026; checked 5 October 2026).

How far ahead should you get advice?

How far ahead to get advice differs by source (checked 5 October 2026):

• TravelHealthPro: ideally at least four to six weeks before travel.
• NHS inform: six to eight weeks.
• The UK Foreign Office: check vaccine advice at least eight weeks before.
• The CDC: at least a month.

All say a late appointment is still worth having or simply give the minimum.

Japanese encephalitis

Japanese encephalitis, spread by mosquitoes that bite mainly between dusk and dawn, occurs in Sri Lanka. TravelHealthPro says the risk is year-round, with peaks around the monsoon seasons. Both TravelHealthPro and the CDC suggest the vaccine mainly for people staying a month or more, travelling often, or doing higher-risk things such as visiting rural areas and rice fields. The CDC does not recommend it for short trips to cities (checked 5 October 2026).

Rabies

Rabies is present in Sri Lanka. TravelHealthPro and the CDC suggest a pre-trip rabies vaccine for some travellers, such as those working with animals, long-stay travellers and people going where treatment is hard to reach. Sri Lanka's Ministry of Health says its government hospitals give rabies vaccine and immunoglobulin after a bite free of charge, but the CDC warns that rabies vaccines are typically not readily available there. Whatever you decide, any bite or scratch needs a doctor the same day (checked 5 October 2026).

The CDC says dogs with rabies are commonly found in Sri Lanka. Do not touch or feed animals you do not know, including dogs, cats and monkeys. The World Health Organization says that if an animal bites or scratches you, wash the wound with soap and water for at least 15 minutes and get medical help straight away, even if the wound looks small.

Cholera and chikungunya

TravelHealthPro says cholera has previously been reported in Sri Lanka and that the risk for most travellers is low. It suggests the oral cholera vaccine only for people at higher risk, such as aid workers. The CDC page for Sri Lanka does not list a cholera vaccine.

There is a chikungunya vaccine. TravelHealthPro says it may be considered for people aged 12 and over who are travelling to an area with a current outbreak or who travel there often or for long periods. The CDC says chikungunya vaccination is generally not recommended. Both say the main protection is avoiding mosquito bites (checked 5 October 2026).

Do you need a yellow fever certificate for Sri Lanka?

There is no yellow fever in Sri Lanka, and visitors coming from Europe, North America or Australia do not need a yellow fever certificate. You need one only if you are aged over nine months and arrive from a country with yellow fever risk, mainly in tropical Africa and South America, or have spent more than 12 hours in transit at an airport in such a country. Sri Lanka's immigration department says travellers who cannot show a required certificate are not allowed to enter (checked 5 October 2026).

Is there malaria in Sri Lanka?

The World Health Organization certified Sri Lanka malaria-free in September 2016. TravelHealthPro says there is no risk of malaria in Sri Lanka, though it still recommends avoiding mosquito bites (checked 5 October 2026).

How big is the dengue risk in Sri Lanka?

Dengue is endemic in Sri Lanka and is found in every district. The National Dengue Control Unit reported 101,370 cases and 78 deaths in 2026 up to midnight on 4 October 2026. About half the cases were in Western Province, which includes Colombo and Gampaha.

Sri Lanka's National Dengue Control Unit says dengue has two peaks each year, during the south-west and north-east monsoons. In 2026 the busiest months so far were June and July, with almost 30,000 cases in July alone. Dengue is a risk all year. Our guide to the best time to visit explains when each monsoon arrives.

Sri Lanka's Epidemiology Unit also reported chikungunya outbreaks in several districts in 2025, first around Colombo, Gampaha and Kandy and later reaching Jaffna. In 2026 the UK Health Security Agency had recorded 18 chikungunya cases in UK travellers returning from Sri Lanka by mid-July. Like dengue, chikungunya is spread by day-biting mosquitoes.

How do you avoid mosquito bites?

The mosquitoes that spread dengue bite mainly in the daytime and are most common in towns and cities. TravelHealthPro advises avoiding mosquito bites, particularly during the day. The CDC advises (checked 5 October 2026):

• Cover up with long sleeves and long trousers.
• Use an insect repellent such as DEET, picaridin (icaridin), oil of lemon eucalyptus or IR3535.
• Sleep in air-conditioned or screened rooms, or under a bed net if the room is open to the outdoors.

Our guide to what to wear in Sri Lanka covers clothes for the heat.

Is there a dengue vaccine?

The UK and US positions on a dengue vaccine differ. TravelHealthPro says a dengue vaccine can be considered for people aged four and over who have had dengue before, and only exceptionally for those who have not, after expert advice. The CDC says there are currently no dengue vaccines available in the United States. Neither recommends it for most travellers (checked 5 October 2026).

What if you get a fever?

A fever in Sri Lanka may be dengue, so see a doctor. The World Health Organization says dengue pain can be treated with paracetamol, and that ibuprofen and aspirin should be avoided because they can increase the risk of bleeding.

Is the tap water safe to drink in Sri Lanka?

Health agencies advise visitors to take care with water. TravelHealthPro says sealed bottled drinks and drinks made with boiled water, such as hot tea and coffee, are usually safe, and that in countries with poor sanitation you should not drink tap water or brush your teeth with it unless it has been treated, and should avoid ice. Neither the UK nor the US agency names Sri Lanka's tap water as unsafe in so many words, so ask your hotel how its water is treated (checked 5 October 2026).

TravelHealthPro suggests choosing food that is freshly cooked and served piping hot, fruit you peel yourself, and pasteurised dairy products. Washing your hands often, especially before eating, also helps, the CDC says. Our guide to Sri Lankan food explains what to order.

The CDC says leptospirosis, a bacterial infection spread in fresh water and mud contaminated by animal urine, is found in Sri Lanka. It advises avoiding floodwater and swimming in fresh, unchlorinated water such as lakes, ponds and rivers.

Are there leeches in Sri Lanka?

Land leeches are common in Sri Lanka's wet forests, such as the Sinharaja rainforest, especially after rain. Lonely Planet advises bringing repellent and leech socks if you trek in the hill country in the rainy season. Leeches are a nuisance rather than a danger, but keep any bite clean.

Heat, sun and Zika

Sri Lanka is hot and humid, and the CDC warns that heat stroke can kill. It advises drinking water and eating regularly, wearing loose, light clothing, limiting hard activity in the heat, using sunscreen of at least SPF 15, and seeking shade in the hottest part of the day, 10 am to 4 pm (checked 5 October 2026).

TravelHealthPro says there is a risk of Zika virus in Sri Lanka and that pregnant women should discuss travel with their health professional before going. Couples planning a pregnancy should check its guidance on how long to wait after travel.

What if you need a doctor in Sri Lanka?

Sri Lanka has a long-standing policy of free health care for its whole population in government hospitals. A 2018 World Bank study notes that even non-citizens are typically treated free, although there is no explicit policy on this, and that government hospitals cannot always stock every medicine. In 2025 the Ministry of Health announced plans for paid services for foreign tourists at state hospitals in tourist areas, starting at Pottuvil near Arugam Bay, so do not count on free treatment.

The UK Foreign Office says emergency medical treatment is not readily available outside the main cities, and you may need to be taken to Colombo for treatment. It publishes a list of medical providers in Sri Lanka where some staff speak English.

For an ambulance, call 1990. This is Suwa Seriya, Sri Lanka's free, island-wide emergency ambulance service, and Sri Lanka Tourism lists it as the ambulance number for tourists. The UK Foreign Office also gives the Accident Service at Colombo General Hospital: 011 269 1111 (checked 5 October 2026).

Do you need travel insurance?

The UK Foreign Office advises having travel insurance that covers local medical treatment and unexpected medical evacuation. It warns that private hospitals can be expensive and that getting home in an emergency is very expensive. The CDC also suggests travel health and medical evacuation insurance.

Can you bring your own medicines?

Sri Lanka's National Medicines Regulatory Authority (NMRA) says visitors may bring medicine for their own use without prior approval, up to the amount needed for their stay or for 90 days, whichever is less. Keep medicines in their original containers, or labelled with the name and strength, and carry your prescription or medical records. Medicines given by injection into a muscle or vein, and medicines on the NMRA's Schedule III, are not allowed without approval. The UK Foreign Office warns that some medicines legal at home may be regulated differently abroad (checked 5 October 2026).

For the wider safety picture, see is Sri Lanka safe?, and for everyday traps, first-time mistakes in Sri Lanka.

Questions people ask

What vaccines do I need for Sri Lanka?

TravelHealthPro (UK) says all travellers should be up to date with routine vaccines and lists tetanus for most. The CDC (US) also recommends typhoid for most travellers, hepatitis A for unvaccinated travellers aged one or older, and hepatitis B for unvaccinated travellers under 60 (checked 5 October 2026). A travel clinic can advise on the rest.

Is dengue a problem in Sri Lanka?

Yes. Dengue is found in every district. The National Dengue Control Unit reported 101,370 cases and 78 deaths in 2026 up to 4 October. The mosquitoes bite mainly in the daytime, so avoid bites all day.

Do I need malaria tablets for Sri Lanka?

The World Health Organization certified Sri Lanka malaria-free in 2016, and TravelHealthPro says there is no risk of malaria there. It still advises avoiding mosquito bites, because of dengue.

Is tap water safe in Sri Lanka?

Neither the UK nor the US health agency names Sri Lanka's tap water as unsafe, but TravelHealthPro advises against untreated tap water and ice in countries with poor sanitation. Sealed bottled drinks and boiled water are usually safe. Ask your hotel how its water is treated.

Are there leeches in Sri Lanka?

Yes. Land leeches are common in wet forests such as Sinharaja, especially after rain. Lonely Planet suggests repellent and leech socks for hill-country treks in the rainy season. They are a nuisance rather than a danger.