Latvia — Water Temperature in Seas, Lakes and Rivers

Sea Water Temperature Along the Coast

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

Water Temperature Trends

Latvia’s coastal waters along the Baltic Sea and inland lakes and rivers are generally cool, with clear seasonal patterns. On the coast, sea surface temperatures typically range from about 0 to 2 °C (32 to 36 °F) in winter when ice can form in sheltered areas, rising to roughly 15–20 °C (59–68 °F) in summer; during warm spells parts of the Gulf of Riga may climb into the low 20s °C (around 72 °F). Spring and autumn see transitional temperatures around 5–15 °C (41–59 °F). Inland, shallow lakes and slow rivers warm more quickly: summer temperatures commonly reach 18–22 °C (64–72 °F) and sometimes approach 25 °C (77 °F) in heatwaves, while shoulder seasons bring cooler conditions of 6–15 °C (43–59 °F) and winter waters sit at or near freezing.

Swimming Conditions

Swimming is broadly allowed and popular in summer at public beaches, lakes and river spots; many coastal beaches are supervised during the bathing season and marked areas indicate safe access. Caution is advised because Baltic waters are brackish and relatively cold even in summer, and currents or sudden weather changes can lower temperatures quickly; wetsuits or shorter exposure times are common for less acclimatized swimmers. Authorities may temporarily restrict bathing after heavy rains or when cyanobacterial blooms occur in late summer, and winter swimming is practiced by enthusiasts only with appropriate precautions such as saunas and cut ice-holes. Overall, Latvia offers legitimate swimming opportunities for a range of preferences, provided swimmers respect signage, local guidance and seasonal safety considerations.