Ibiza and Formentera will say goodbye to 2025 with a winter that, according to the forecasts of the State Meteorological Agency (AEMET), will be warmer than usual and with rainfall within the average. The forecast comes after an exceptionally wet autumn in the Pitiusas, which has left historical precipitation records and a notable increase of tropical nights.
A warmer than normal winter
Winter will begin on December 21 at 16.03 hours and will last until March 20, with a total duration of 88 days. AEMET anticipates that between January and March 2026 temperatures will be higher than usual, standing above 12 °C on average in Ibiza and 13 °C in Formentera.
Throughout the quarter, the thermal trend will decrease until the end of January and then rebound towards spring, although the agency stresses that most days will record above-average values. As for rainfall, a normal situation is expected, around 106 l/m² in Ibiza and 75 l/m² in Formentera.
For the Christmas period, the models forecast mild temperatures, with highs of 16-17 °C and lows of 8 °C, plus the possibility of some rain that could add up to 28 l/m², the usual value for these dates.
Very warm autumn with more tropical nights
The autumn of 2025 was characterized by a very warm environment, with average temperatures of 19.7 °C in Ibiza and 21.1 °C in Formentera. The anomalies recorded (+0.7 °C and +0.6 °C, respectively) reflect a clear upward trend.
September was the hottest month, followed by October and November. The number of tropical nights, those with minimums equal to or above 20 °C, increased markedly: at Ibiza Airport alone, 20 tropical nights were recorded, 15% more than usual.
An extremely wet autumn: historical records
If anything has marked the autumn in Ibiza and Formentera, it has been the rain. Ibiza recorded an average of 362 l/m², 91% above the normal value, while in Formentera it reached 237 l/m², 70% more than usual. In Ibiza it practically rained in one quarter what usually falls in the whole year.
Episodes of torrential rains were decisive. On September 30, the Ex-Gabrielle squall left 253 l/m² in Eivissa, the maximum since records have been kept (2015), and 176 l/m² at the Airport, an all-time record since 1952. Formentera collected 115 l/m² that same day. In addition, September closed with a monthly record in Eivissa: 264 l/m².
On October 11, another DANA, baptized Alice, discharged again with intensity: 89.4 l/m² at Ibiza Airport and 78.8 l/m² at Formentera.
Despite this succession of severe episodes, the number of days with storms remained within the normal range: 13 days, compared to the usual 14.
Wind and annual balance
The autumn also left normal values of strong wind: 13 days recorded at Ibiza Airport. The maximum gust of the quarter reached 87 km/h during the squall Benjamin, on October 23. In Formentera, the most intense gust was 55 km/h on November 21.
With the year still to close, 2025 is confirmed as a very warm and humid period: anomalies of +1.1 °C in Ibiza and +0.8 °C in Formentera, in addition to an increase in precipitation of 21% and 16%, respectively.
