The best time to go to Ulldecona is during the spring (April to June) and fall (September to October) when the weather is pleasant and comfortable for exploring.During these months, you'll experience mild temperatures, typically ranging from 60°F to 75°F (15°C to 24°C), making it ideal for walking through the town, visiting the Castle of Ulldecona, or exploring the ancient olive trees. The spring brings blooming wildflowers, while the fall offers a gentle warmth great for outdoor activities. This period is particularly good for couples or solo travelers who appreciate comfortable weather for sightseeing without the intensity of summer heat.The summer months (July and August) are also popular, especially for families, as the weather is consistently warm and sunny, often exceeding 85°F (30°C). While it can be quite hot, it's a great time to enjoy activities like visiting the nearby beaches along the Costa Daurada, which are just a short drive away, or spending evenings at outdoor cafes. Many local festivals also take place during the summer, offering a lively experience.Ultimately, your choice depends on your preference for weather and activity.