Heat, humidity and the use of shared spaces create the ideal conditions for the spread of fungal infections.

How to prevent fungal infections at swimming pools and in public showers?

Humidity, higher temperatures and contaminated surfaces provide the ideal environment for these organisms to thrive, leading to redness, inflammation and itching.

BY Mariona Fernández | 12 June 2026

In summer, there is nothing more appealing than spending the day at the swimming pool or taking a refreshing dip. However, these same conditions that we enjoy so much can also favour the development of fungal infections. Humidity, increased temperatures and contaminated surfaces provide the perfect environment for these organisms to thrive and cause redness, inflammation and itching.

Although these infections are common during the warmer months, experts remind us that there are numerous myths surrounding their transmission and prevention. Understanding how they are actually spread and which preventive measures are effective can help people enjoy the summer with greater peace of mind.

Factors that contribute to fungal growth in summer

Heat, humidity and the use of shared spaces create the ideal conditions for the spread of fungal skin infections. These infections tend to appear more frequently in areas of the body where sweat and moisture accumulate, particularly on the feet, where athlete’s foot is especially common during the summer. Other areas where they may develop include the groin, armpits and trunk, which are common sites for tinea versicolour.

For this reason, it is advisable to take extra precautions during the warmer months, particularly in places such as swimming pools, beaches, gyms and changing rooms, where moisture tends to accumulate.

Myths and facts about fungal infections in summer

There is a common belief that fungal infections are more easily transmitted during the summer and that, as a result, this is the time of year when more measures should be taken to prevent it. However, there is no conclusive scientific evidence to support this claim, nor are all fungal conditions transmitted in the same way.

This is according to the Spanish Academy of Dermatology and Venereology (AEDV), which debunks some of the most widespread misconceptions surrounding this type of infection.

The perception they are more common in summer is largely explained by the conditions associated with this season. Many fungi form part of the skin’s natural microbiota and do not usually cause symptoms.

People enjoying a sunny day at the swimming pool

As temperatures rise, together with humidity and occlusion, these organisms multiply and symptoms may appear, including itching, changes in nail colour or painful blisters. Therefore, in many cases, fungal infections are caused by the overgrowth of these microorganisms rather than by transmission.

However, this does not mean that preventive measures against fungal growth are unnecessary or that there is no risk of transmission. Some infections, such as athlete’s foot, can indeed be contagious. They are usually spread through direct contact with infected skin, the sharing of personal items or contact with contaminated damp surfaces.

Even so, transmission is not automatic and depends on various factors, including genetic predisposition and environmental conditions that favour the development of infection.

Habits to prevent fungal infections in summer

The best way to prevent fungal conditions during the summer is to adopt a series of simple habits that help keep the skin clean and dry. For example:

Dry the body thoroughly after bathing or showering. Particular attention should be paid to areas where moisture tends to accumulate, such as between the toes, in the groin or under the arms.
Change clothes regularly. Moisture caused by perspiration can encourage fungal growth, especially in garments such as underwear and socks.
Wear breathable fabrics and footwear. Allowing the skin to ventilate helps prevent the build-up of heat and moisture.
Do not share personal items. Towels, footwear, deodorants and personal clothing can facilitate the transmission of certain infections.
Avoid walking barefoot in damp communal areas. Swimming pools, showers and changing rooms are places where wearing flip-flops is advisable to reduce the risk of infection.
Maintain a healthy lifestyle. A strong immune system helps the body better control the proliferation of microorganisms.

In summary, during the summer conditions may arise that favour the development or transmission of certain fungal infections, although the process is more complex than is commonly believed. For this reason, adopting simple preventive habits is essential both for protecting yourself and for reducing the risk of transmitting infections to others.

If you experience any symptoms consistent with a fungal growth, it is advisable to consult a healthcare professional for an appropriate diagnosis and treatment.