Mallorca in September: weather, temperatures and rain days

1What the weather is like in Mallorca in September

In Mallorca September is a late-summer month. The heat eases, the sea stays very warm. Rain increases markedly: after November and October, September is the month with the third largest amount of rain.

On average over the years 2011 to 2025, the Palma de Mallorca CMT station reaches 28.3 °C by day and 21.0 °C at night in September. On 5.1 days at least 1 mm of rain falls, adding up to 56.3 mm in the month.

For comparison: in August the average high is 30.9 °C, in October it is 25.1 °C. For rainfall, September ranks number 3 of 12 months. The wettest is November with 87.3 mm, the driest is July with 2.7 mm.

Individual days deviate strongly from the average. The highest value for September in the years 2011 to 2025 was 34.1 °C on 4 September 2023, the lowest 14.8 °C on 17 September 2017.

The figures apply to Palma right on the coast. Inland and in the Serra de Tramuntana, the weather can turn out very different on the same day.

2Day by day: September in Palma in the calendar

The calendar shows for each day in September the average high and low for the years 2011 to 2025 and the share of years in which at least 1 mm of rain fell on that date. These are averages from past years and not a forecast. For the next few days, see the live forecast for Mallorca.

Averages of past years, not a forecast. Station: PALMA DE MALLORCA CMT. Data: NOAA GHCN-Daily.

3Sea temperature in Mallorca in September

Off the Bay of Palma the sea averages 25.9 °C in September. In August it is 26.9 °C, in October 23.5 °C. The sea has stored the warmth of the summer. Swimming is pleasant throughout the month.

The value comes from the NOAA OISST satellite analysis for open water off the bay, averaged over 2011 to 2025. In shallow coves and right at the beach the water can be warmer or colder.

4What to pack for Mallorca in September

For September you pack summer clothing and swimwear. Add a light jacket or a thin jumper for later evenings and rain protection for showers. Sun cream is still needed.

5Which activities suit the weather in September

• Beach: Very good, the water is warmer than in July.
• Boat trip: Good on calm days. In thundery weather, follow the provider's advice.
• Hiking: Easier again than in high summer, best in the morning.
• Caves: A good choice for one of the rain days.
• City: More pleasant than in July and August, still warm at midday.

The climate table for Mallorca and the overview of the best time to visit show how September fits into the whole year. Right next to it are August and October. The travel guide mallorcaplaner.com collects ideas for outings.