Weather in Cala Millor: forecast, climate and sea temperature

1Weather forecast for Cala Millor

The forecast comes from the Norwegian weather service MET Norway, through its Locationforecast service, and applies to the coordinates of Cala Millor. It updates itself and covers around 9 to 10 days. MET Norway does not provide a forecast for longer periods. Anything further ahead is described only by the averages below, and they show what is usual, not what is coming.

Why the forecast stops after 9 to 10 days is explained under forecast for Mallorca.

2The climate of Cala Millor month by month

Averages of past years, not a forecast. Station: Son Servera (AEMET B496X). Fuente: AEMET. Years with complete data per month: 12 to 15. Sea: NOAA OISST v2.1, open sea.

Cala Millor is warmest in August with an average of 30.3 °C by day, just ahead of July with 30.0 °C. Nights are mildest in August at 20.6 °C. In May the average high is 23.0 °C, and in October it is still 25.0 °C.

Autumn is the wettest season. September brings an average of 57.4 mm, October 67.7 mm and November 88.9 mm on 8.7 rain days. July is almost dry with 4.3 mm and 0.7 rain days. Days stay mild in winter, with 16.6 °C in January and 16.4 °C in February. Nights cool to an average of 6.4 °C in February.

3Sea temperature in the open sea off Cala Millor by month

The sea off Cala Millor is coldest in February at 14.4 °C and barely warmer in March at 14.5 °C. In April it reaches 16.0 °C, in May 18.5 °C. In June the water rises to 22.5 °C, in July to 25.5 °C and in August to 26.8 °C, the highest monthly value.

The sea stays warm in autumn, with 25.8 °C in September, 23.4 °C in October and 20.1 °C in November. In December it is still 17.1 °C, in January 15.3 °C. So the water is warmer in October than in June.

The figures apply to the open sea around 21 km east of Cala Millor in a straight line, not to the swimming spot on the beach. More on the sea around the island under sea temperature in Mallorca.

4When to go to Cala Millor, depending on what you want to do

• Swimming in warm water: In July, August and September the water off Cala Millor is 25.5 °C, 26.8 °C and 25.8 °C. July is the driest month with 0.7 rain days.
• Warm but not hot: In May days reach 23.0 °C, in October 25.0 °C. The open sea still averages 23.4 °C in October, but only 18.5 °C in May. On the other hand, October brings 67.7 mm of rain.
• Walking and cycling: In March the average high is 17.9 °C, in April 20.0 °C.
• Winter: From December to February days range between 16.4 °C and 18.0 °C, nights between 6.4 °C and 8.0 °C.

How October turns out across Mallorca is shown under Mallorca in October. Further north on the east coast lies Cala Ratjada, and every month side by side is in the Mallorca climate table.

5Where and how the Cala Millor figures are measured

Cala Millor lies on the bay of Son Servera. According to Wikipedia, the northern part of the town belongs to the municipality of Son Servera and the southern part to Sant Llorenç des Cardassar.

Air temperature and rain come from station B496X, named Son Servera, retrieved through AEMET OpenData, the data service of the Spanish weather agency. It stands at 39.6303 degrees north and 3.3836 degrees east at 25 m above sea level, 3.8 km north of the centre of Cala Millor in a straight line.

The analysis uses the daily values of the 15 years from 2011 to 2025. For temperature, July, October and December rest on 14 years, for rain July and October on 14 and November on 12 years. A rain day is a day with at least 1 mm of precipitation. This analysis contains no data on sunshine or wind.

The sea temperature comes from a different source, the NOAA OISST analysis for the grid cell at 39.625 degrees north and 3.625 degrees east. It is not a measurement on the beach. In shallow coves the water can differ.