Denmark — Water Temperature in Seas, Lakes and Rivers
Check today’s water temperatures across Denmark, including seas, lakes, and rivers. View real-time updates and seasonal ranges for both coastal and inland waters. We find every place where you can swim and show you the water temperature there today and throughout the year.
Sea Water Temperature Along the Coast
Chart of Average Temperature Changes Over the Last 60 Days
Places with the Warmest Sea Water Today
The Most Popular Seaside Places
Coastal Seas and Oceans
Water Temperature in Lakes and Rivers
Popular Lakes
Popular Rivers
Popular Places
Water Temperature and Swimming Overview
Regions and Map
Water Temperature Trends
Denmark’s extensive coastline and numerous inland lakes and rivers provide a wide range of swimming conditions. Coastal sea temperatures are typically cold in winter, averaging around 2–6 °C (36–43 °F) from December to March. In spring the water slowly rises to about 6–12 °C (43–54 °F), and by summer coastal averages reach roughly 17–20 °C (63–68 °F), with sheltered bays and southern Baltic spots occasionally climbing to 21–23 °C (70–73 °F) during warm spells. Autumn sees a gradual cooling, commonly in the 10–15 °C (50–59 °F) range. Because Danish coastal waters are relatively shallow and influenced by local currents, temperatures can vary noticeably between exposed beaches and sheltered fjords.
Swimming Conditions
Freshwater lakes and slow rivers warm more quickly and usually offer higher summer temperatures than the open sea. Typical lake and river temperatures in summer are about 18–22 °C (64–72 °F), and small shallow lakes can reach mid-20s °C (mid-70s °F) in hot weather. Swimming is widely permitted and popular year-round; Denmark has a strong bathing culture with monitored beaches in the bathing season (summer months) and lifeguard services at many main beaches. However, swimmers should heed local safety notices: strong currents or shipping lanes affect some coastal areas, and occasional algal blooms or poor water quality after heavy rains can lead to temporary closures. Cold-water bathing and winter swimming are also practiced, often combined with saunas, but require experience and caution because of low temperatures and related risks.