January is the coldest month in the Costa Brava, with average temperatures hovering around 8°C (46°F). While the region enjoys a Mediterranean climate, the winter months can be surprisingly crisp, especially when the "Tramuntana" (a strong northern wind) blows down from the Pyrenees. In 2026, nighttime lows in January and February can dip to 3°C or 4°C, though it rarely snows along the coast. For travelers visiting in early 2026, the sea temperature is also at its lowest, around 13°C, making it unsuitable for swimming. However, winter on the Costa Brava is often characterized by bright, clear blue skies and thin crowds. It is a "high-value" time for hikers and culture seekers to visit the Dali Triangle or walk the Camí de Ronda coastal paths without the oppressive heat or swarms of summer tourists.