Best time to swim in Lisbon in Portugal Sea temperature by month

The city of Lisbon benefits from its geographic location. It opens directly onto the Atlantic Ocean, which influences its climate. Year-round, it enjoys a mild and pleasant climate with a peak of heat in summer. One might be tempted to believe the water is ideal all year. But, to the disappointment of many, the sea temperature in Lisbon rarely exceeds 23°C even during the summer season. Still, this area offers visitors the opportunity to enjoy pleasant moments of relaxation, whether to swim in Lisbon or to practice water sports like surfing or bodyboarding. You just need to choose the right moment to go.

Best times for a seaside vacation in Lisbon

The water temperature in Lisbon is cool most of the time due to the proximity of the Atlantic Ocean, which affects the coast's climate. From May to November, the period is favorable for visiting the beaches.

In May and June, most swimming spots are deserted and are ideal for those who want to enjoy the tranquility of the beaches. Swimming is certainly cool, but the sun and warmth are already present to provide a pleasant feeling.

From July to September, a slight rise in Lisbon's sea temperature is barely noticeable because swimming remains cool. It is the warmth of the air and the stronger presence of the sun that make the difference, which explains the influx of holidaymakers to Lisbon's beaches.

October and November present the same swimming conditions as in May and June. The coolness of the water is not enough to keep people from the beaches.

Unfavorable periods for swimming in Lisbon

Because mildness characterizes the water temperature in Lisbon, you are unlikely to face freezing conditions. The period between December and April corresponds to the unfavorable time for visiting beaches and swimming spots. However, it is not uncommon to see surfers and bodyboarders, wearing comfortable wetsuits, brave the cold water.