Why do tourists often get sick in Barcelona during summer?

Barcelona in August is one of the most exciting places to visit in Europe. With its beautiful beaches, open-air festivals, iconic landmarks, and vibrant food scene, it's easy to get swept up in the magic of the city. But alongside the beauty, there's a pattern I see every year in my medical practice: international visitors getting sick.

From dehydration to food poisoning, there are specific health risks that become more common among tourists—especially those unfamiliar with the Mediterranean climate or local habits. If you're planning a trip, it's crucial to understand these risks so you can enjoy your time in Barcelona to the fullest.

1. Heatstroke: Is Barcelona’s sun more dangerous than you think?

The short answer is yes — especially in August. Temperatures can easily exceed 30ºC (86ºF), and the sun's intensity is often underestimated by visitors used to milder climates. When you're walking all day, sightseeing or queuing outdoors, it adds up quickly.

Common signs of heatstroke include confusion, nausea, throbbing headache, heavy sweating (or a sudden stop in sweating), and rapid pulse. Many tourists mistake these early symptoms for simple tiredness or jet lag.

So how do you avoid heatstroke? 

- Stay out of direct sunlight during peak hours (12–16h)

- Wear light, breathable clothing and a hat

- Carry a refillable water bottle

- Take regular breaks in the shade or air-conditioned spaces

And if you're feeling unwell? Don’t push through it — seek medical help early.

2. Can food poisoning ruin your holiday?

Barcelona is known for its delicious seafood, tapas, and paella — but food safety isn’t always consistent, especially in high-tourism areas. Hot weather can also accelerate spoilage, particularly for shellfish, sauces, and pre-prepared dishes.

Typical symptoms of foodborne illness include vomiting, diarrhea, stomach cramps, and sometimes fever. These symptoms can appear within hours of eating — and if they persist beyond 24 hours, dehydration becomes a risk.

To minimize your chances:

- Choose busy, reputable restaurants with high turnover

- Avoid raw shellfish unless you're certain it's fresh

- Be cautious with street food or buffets left unrefrigerated

Wondering if a stomach bug is serious enough to call a doctor? If you're unable to keep liquids down, have a fever above 38.5ºC, or notice blood in your stool — it’s time to get checked.

3. Why is dehydration so common among travellers in Barcelona?

Because it sneaks up on you. You may not feel thirsty while walking through shaded alleys or sipping cocktails on a rooftop, but your body is constantly losing fluids — through sweat, heat, alcohol, and even air travel.

Early signs of dehydration include dry mouth, dizziness, fatigue, and dark yellow urine. Many tourists ignore these, chalking them up to sleep deprivation or sun exposure.

What can you do? 

- Drink small amounts of water regularly — not just when you're thirsty

- Avoid excessive caffeine or alcohol without hydration in between

- Watch for warning signs and rest when needed

Severe dehydration can cause fainting, confusion, or even hospitalisation. If you’re unsure, it’s always better to check in with a doctor.

Final thoughts: Can these issues be avoided entirely?

In most cases, yes. With the right habits and a bit of awareness, you can significantly reduce the chances of getting sick during your stay in Barcelona.

If symptoms appear, don’t delay. We provide quick and discreet medical care — at your hotel, online, or in our clinic. Consultations are available in English, German, Romanian, Russian, and Spanish.

Let your Barcelona memories be about the views, the food, and the culture — not the ER visit.

About the author

Dr. Stefan Botnar, MD – English Speaking Doctor in Barcelona for Tourists

Dr. Stefan Botnar is a board-certified English speaking doctor in Barcelona with over 15 years of experience in internal medicine and public health. He provides fast, out-of-pocket consultations for international patients, specializing in preventive care, substance metabolism, travel-related issues, and especially STD/ETS testing and treatment. His clinic is centrally located near the Sagrada Familia and offers in-person and telemedicine appointments, immunizations, nutritional advice, and minor emergency care (fever, gastroenteritis, allergic reactions). Patients pay directly—no insurers required.

Dr. Botnar speaks English, Spanish, Russian, Romanian, and German, ensuring clear communication with a diverse tourist clientele. He delivers evidence-based diagnoses and tailored treatment plans, helping visitors prevent common ailments (heatstroke, food poisoning) and offering comprehensive follow-up until they return home. Contact his Barcelona clinic for fast, reliable medical support during your visit.

Dr. Botnar is a specialist in internal medicine with over 15 years of experience in preventive health and patient education. He focuses on the mind-body connection and helping patients navigate seasonal transitions with ease.

Disclaimer

This article is for informational purposes only and is not a substitute for professional medical advice. Always consult a healthcare provider if you experience persistent or worsening symptoms.