First and last swim in Mallorca: what the sea does month by month
Wetter Mallorca editorial team · · 2 min read
Going by the averages, the swimming season in Mallorca runs from June to October: the sea off Palma is 22.7 °C in June and 23.5 °C in October, and warmest in August at 26.9 °C (NOAA OISST, 15-year average). May is only 18.9 °C, November still 20.0 °C.
The sea off Palma month by month
According to NOAA OISST, the sea off the Bay of Palma has these average temperatures over 15 years:
- April: 16.3 °C
- May: 18.9 °C
- June: 22.7 °C
- July: 25.7 °C
- August: 26.9 °C
- September: 25.9 °C
- October: 23.5 °C
- November: 20.0 °C
The water is coldest in February at 14.5 °C and warmest in August. The figure comes from satellite data for the open sea, not from a beach measurement, and shallow bays can differ. Every month is on the sea temperature page.
The first swim in Mallorca: May or June
In May the air already feels like summer but the sea does not. Palma averages highs of 23.5 °C over 2011 to 2025, according to AEMET OpenData, while the water is only at 18.9 °C. Swimming in May takes some resolve. In June the sea climbs to 22.7 °C with air at 27.8 °C, and for most people that is when the swimming season really begins. Details for May are on the May weather page.
The last swim in Mallorca: October, or November for the hardy
The sea stores summer heat and cools more slowly than the air. As a result, the water in October is warmer than in June at 23.5 °C, even though the air only averages 25.1 °C. Even November, at 20.0 °C, is warmer than May, with daytime highs on land of 20.3 °C. The October weather page has more.
What this means for planning a Mallorca trip
Here the swimming season counts every month in which the sea off Palma averages above 20 °C. The reading is clear: by that rule the season in Mallorca runs from June at 22.7 °C to October at 23.5 °C, with November right on the line at 20.0 °C. Early in the year you get warm air and a cool sea, late in the year the reverse. All values are averages, not a forecast. All months side by side are in the calendar and on best time to visit.
Frequently asked questions
When can you start swimming in the sea in Mallorca?
For most people from June, when the sea off Palma averages 22.7 °C according to NOAA OISST. In May it is only 18.9 °C.
Until when is the sea in Mallorca warm enough to swim?
Into October, when the water off Palma still averages 23.5 °C, warmer than in June. In November it is 20.0 °C.
When is the sea warmest in Mallorca?
In August, at an average of 26.9 °C off Palma according to NOAA OISST. It is coldest in February at 14.5 °C.
Is the sea in Mallorca warmer in October than in May?
Yes, clearly: an average of 23.5 °C in October against 18.9 °C in May, according to NOAA OISST. The sea releases summer heat only slowly.
Text written with AI and automatically checked against editorial rules before publication. Figures come from the linked sources. Wetter Mallorca is not an official weather service.
