During late May, Madrid enjoys its characteristic Mediterranean climate with maritime influences. Anticipate pleasant daytime conditions as spring is in full swing. The average maximum temperature for this period is around 19–20°C (66–68°F), while the average minimum temperature hovers at approximately 13–14°C (55–57°F).
It’s advisable to have an umbrella on hand, as there might be occasional rainfall during these days. Consider dressing in layers, as daytime temperatures are typically warm, while the evenings can bring a slight chill. The water temperature remains around 14.0°C (57.2°F), making swimwear optional.