Tenerife is often called the "Island of Eternal Spring," and while it isn't "scorching" in December, it remains one of the warmest places in Europe. In 2026, you can expect average daytime temperatures between 18°C and 22°C (64°F–72°F). The southern part of the island, including Costa Adeje and Los Cristianos, is significantly sunnier and drier than the north. While the air is mild and perfect for hiking or outdoor dining, the Atlantic Ocean remains around 20°C, which many find refreshing for a swim. You might experience occasional "Calima" winds from the Sahara, which can temporarily spike temperatures into the mid-20s. For a 2026 winter escape, Tenerife is a high-value destination because it offers reliable sunshine and a "t-shirt weather" atmosphere that is far superior to the freezing temperatures of mainland Europe, though you will still need a light jacket or sweater for the refreshingly cool evenings.