Romania — Water Temperature in Seas, Lakes and Rivers
Check today’s water temperatures across Romania, 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
Romania’s Black Sea coast and its inland waters offer a range of swimming conditions driven largely by season and geography. Along the Black Sea, surface temperatures rise from roughly 6–9 °C (43–48 °F) in winter to about 20–24 °C (68–75 °F) in late spring and early summer, peaking around 24–28 °C (75–82 °F) in July and August before cooling to 15–20 °C (59–68 °F) in autumn. Coastal lagoons and sheltered bays can be warmer than open sea. Inland, lowland lakes and reservoirs commonly reach 20–26 °C (68–79 °F) in summer, while shallow salt or mineral lakes can climb into the high 20s °C (mid- to high-70s–80s °F). Major rivers such as the Danube warm to roughly 18–25 °C (64–77 °F) in summer but can fall to near freezing in winter; mountain rivers and alpine lakes remain much colder year-round, often 5–12 °C (41–54 °F).
Swimming Conditions
Swimming is widely permitted and popular during the warmer months, generally from late spring through early autumn when temperatures and monitored water quality are suitable. Public beaches on the coast and many lakes are managed with seasonal lifeguards and water-quality testing; authorities may restrict access during pollution events, algal blooms, strong currents, or jellyfish sightings. Caution is advised in rivers and mountain streams because of cold water, swift currents, and changing conditions even in summer. Practical considerations—temperature, depth, currents and official advisories—determine when and where swimming is safe.