If you prefer warm weather and swimming, the best time to visit is during the summer months of June to August. During this time, the temperatures are high and the sea is perfect for swimming and water sports.
If you prefer cooler weather and hiking, the best time to visit is during the spring and fall months of April to May and September to October. During these months, the weather is mild and perfect for exploring the national parks. And even better, there are fewer tourists crowding around the most popular spots.
Overall, the best time to come to Croatia for an activity holiday is when you can find the perfect balance of weather and activities that suit your preferences.