Szczecin, West Pomerania
Tuesday, 03 November 2026 PL / EN
Lakes

Lake Jamno

Mielno
About Lake Jamno

A coastal lake in Mielno municipality, cut off from the Baltic by a spit, with sailing marinas and tourist boat trips.

Lake Jamno is a coastal lake on the Koszalin Coast, in Mielno municipality, cut off from the Baltic Sea by a spit. According to the Wikipedia entry it ranks 9th in Poland by area, and 3rd in the voivodeship. The water surface measures from 2205.2 to 2239.6 ha, depending on the measurement.

How it came to be and how it is linked to the sea

Jamno was formed from a former sea bay. It is connected to the Baltic by the Jamieński Nurt canal, located about 2 km beyond Unieście, and the mouth of the canal is sometimes silted up during storms. As a result, sea water affects the state of the lake's waters.

The lake is shallow: the average depth is 1.4 m and the maximum 3.9 m. The water surface lies at 0.1 m above sea level, and the shape of the basin is irregular, narrowed in the west and widening towards the east.

Sailing, water sports and cruises

Water sports are practised intensively on Jamno. There are numerous sailing harbours on the lake, and in season the tourist boats “Mila”, “Koszałek” and “Parostatek” sail on it. Of the harbours in the area, the portal describes Podamirowo Harbour and the Fishing Harbour in Unieście.

Fish and nature

According to the regional water management board, bream, pikeperch and European eel dominate here, and pike, tench, crucian carp, perch, roach, silver bream, ruffe and sea trout are also present. The lake is home to the river lamprey, a species under strict protection in Poland. In the fishing typology Jamno is classed as a pikeperch type.

The name

The name Jamundsche See was recorded on a map of 1789. The name Jamno was introduced officially in 1948 in place of the German Jamunder See; the names commission drew on the word “jama” (pit).

Practical information

  • Location: Mielno municipality, Koszalin County; the whole lake lies within the municipality's boundaries.
  • Cruises and harbours: timetables, rules for boarding and equipment hire are provided by the operators and harbour managers, so check them before your visit.
  • Nearby: Zagroda Jamneńska and the Church of Our Lady of the Rosary in Jamno.
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