The best time to visit Tammisaari is during the summer months, from June to August, when the weather is warmest and most inviting for outdoor activities.
During this period, the average daytime temperatures are comfortably mild, ranging from 18°C to 22°C (64°F to 72°F). The long daylight hours, often extending past 10 PM, provide ample opportunity to explore the town and its surroundings. This is ideal for couples seeking a romantic getaway, as they can enjoy leisurely strolls along the guest harbor, dine alfresco at waterfront restaurants, and take boat trips through the archipelago.
Families will also find summer a great time to visit. The warmer water temperatures make swimming and other water sports enjoyable at the local beaches, such as the popular Plagen beach near the town center. Many local events and festivals are scheduled during these months, offering entertainment for all ages.
While the summer is the most popular, late spring (May) and early autumn (September) also offer pleasant conditions with fewer crowds.