Sapanca Weather by Month: Temperatures and Rain All Year

Sapanca's weather in general

Sapanca sits at roughly lake level in Sakarya province, in Turkey's Marmara region — milder than nearby highlands like Kartepe, but wetter than most coastal Turkish towns because of its lake and the surrounding forest.

According to Turkey's State Meteorological Service (MGM) long-term averages for the Sakarya region, mean temperatures range from around 6°C in January to a peak near 23–24°C in July and August, with rainfall spread fairly evenly across the year rather than concentrated in one season.

Monthly averages (MGM long-term data, Sakarya region)

Source: Turkish State Meteorological Service (MGM) — Sakarya statistics, long-term averages, accessed October 2026.

What this means in practice

Unlike Turkey's coastal towns, Sapanca has no truly dry month — rain is spread across every season, with only a moderate gap between the wettest month (December, around 100mm) and the driest (June, around 48mm). That makes Sapanca more of a "nature and forest" destination than a "guaranteed sunshine" one, which is part of its appeal: morning mist over the lake and green hills year-round.

This page covers Sapanca's general year-round climate. If your trip is winter-specific and you want to know about Kartepe's ski season and road conditions, see our dedicated Sapanca in winter guide.

Best months to visit

May, June and September are the driest and warmest without being hot, making them best for a private-pool villa trip or outdoor activities. For villa and restaurant details and where to stay, see our complete Sapanca and Maşukiye guide.

FAQ

Is Sapanca rainy all year?

Relatively, yes — rain occurs in every month to varying degrees, peaking in late autumn and winter (October–December) and at its lowest in June.

What's the difference between this page and the Sapanca in winter guide?

This page gives the general year-round climate picture with official figures, while the winter guide focuses on a specific practical decision: whether to go, when Kartepe opens, and road conditions.

Is summer in Sapanca hot?

Mild rather than hot: July and August average around 23–24°C, cooler than Turkey's southern coastal towns thanks to the relative elevation and surrounding forest.