Weather in Therasia in December
December is early winter in Therasia: cool and often wet. Daytime highs average around 15°C / 60°F, and nights drop to about 11°C / 52°F. Sea temperatures average around 18°C / 64°F, bracing, and too cool for many swimmers. Expect rain on around 9 days and about 82 mm over the month, often in heavy bursts with dry spells between them. Therasia is Santorini's quiet sister, sitting on the western edge of the same volcanic caldera. Strong northerly and southerly winds are common, and the sea can stay rough for days at a time. Daylight lasts about 10 hours, so plan sightseeing for the middle of the day. Bring a warm coat, layers, an umbrella and shoes that can cope with rain. Short days and changeable skies are part of the appeal, with fewer visitors and a more local feel. Plan outdoor time around the middle of the day, when it's at its warmest.
Swimming in Therasia in December
At around 18°C / 64°F, the sea in Therasia is swimmable in December if you don't mind a chill. The best time for swimming is July, August and September, with August usually the warmest. There are no lifeguards or beach services out of season, so swim with care. The sea is usually at its calmest early in the morning. A short wetsuit helps if you feel the cold.
Crowds & Prices in Therasia in December
December is one of the quietest months in Therasia, with few visitors and a local, everyday feel. Prices are at their lowest of the year, although fewer hotels are open. Christmas and New Year bring some Greek visitors home, but it stays quiet. With so few visitors, the atmosphere is genuinely local, and people have time to chat. Book ahead anyway, as the few places that stay open are small.
What's Open in Therasia in December
Ferry links from Santorini to Therasia continue through December, though with fewer sailings than in summer. Very little stays open: expect one or two tavernas and a few rooms at most. Archaeological sites and museums keep shorter winter hours. Most sites close on 25 and 26 December. It's worth calling ahead to restaurants, as off-season hours can be irregular. Check opening days before setting out, as some places open only at weekends.
Festivals & Holidays in Therasia in December
On 6 December, Saint Nicholas, patron saint of sailors, is honored in harbors across Greece, and decorated boats appear alongside Christmas trees. Christmas is celebrated with church services, carols sung door to door by children and festive sweets like melomakarona and kourabiedes. In Therasia, these occasions are celebrated much as they are across the rest of Greece. Otherwise, life follows its normal rhythm, with Sunday lunches and busy cafés rather than big events.
Is December a Good Time to Visit Therasia?
It depends on what you want. In December, Therasia is peaceful and inexpensive, but the season is over, the sea is too cool for most swimmers and the weather can turn. In numbers: highs of about 15°C / 60°F, lows of 11°C / 52°F and rain on around 9 days in a typical December. It's fine for a quiet break or day-tripping from Santorini. For a proper beach holiday, go in June, September or October.
Frequently Asked Questions
What time does the sun set in Therasia in December?
In early December, the sun sets in Therasia at around 5:05 pm. By mid-month it's around 5:05 pm, and by the end of December around 5:10 pm. All times are Greek local time. With short days, plan outdoor sightseeing for the morning and early afternoon.
Does it get stormy in Therasia in December?
December is one of the stormiest months in the Aegean. Strong winds and bands of rain come through regularly, and the worst storms can cancel ferries for a day or more. There are calm, bright days in between, and snow at sea level is very rare. If you're traveling by ferry, allow a buffer day before any flight home.
Can I take a day trip to Therasia in December?
Yes, though it takes more planning. A local ferry links Therasia with Santorini all year, but in December sailings are less frequent and can be cancelled in bad weather. Check the timetable before you go.
Do I need a car on Therasia in December?
No. Therasia is small enough to explore on foot, and the distances between the harbor, village and beaches are short. In December, seasonal minibuses and beach boats usually don't run, so be ready to walk and bring sturdy shoes.
Is December or January better for visiting Therasia?
December has the edge for atmosphere, with Christmas decorations and New Year celebrations, while January is quieter still, with Epiphany on 6 January. The weather is similar: cool, changeable and occasionally stormy. Both suit travelers who want the island at its most local.
Therasia Weather by Month
