Kotka tide times

Predictions: Open-Meteo Marine (MeteoFrance SMOC, 0.08° grid) — heights relative to MSL (not chart datum / LAT). Model-derived.

Model-derived from a global ocean grid. Useful indication; expect about ±45 minutes on average vs. a local harmonic gauge, individual stations vary widely. See /methodology for per-region detail. Not for navigation.

Conditions as of 07:00 local time. Refreshes daily.

Predictions: Open-Meteo Marine (MeteoFrance SMOC, 0.08° grid) — heights relative to MSL (not chart datum / LAT). Model-derived. · Not for navigation.

The angler tradition for major/minor fishing windows: major ≈3-hour windows around moon transit and opposition; minor ≈2-hour windows around moonrise and moonset. Times are Europe/Helsinki local. Folk tradition, not a scientific forecast.

Kotka is a maritime industrial city on an island in the eastern Gulf of Finland, at the mouth of the Kymi River (Kymijoki) system, 130 km east of Helsinki. The city was established in 1878 on islands at the river delta; the Kymi flows through and around the city before reaching the Gulf of Finland through several distributary channels. The position at a major river mouth gave Kotka its economic identity — sawmills processing lumber from the interior, paper and pulp mills using the river current and later the power grid, and a harbour that exported Finnish forest products to Europe. The Langinkoski Imperial Fishing Lodge, 5 km north of the city centre on the Kymi River rapids, is one of Finland's more unusual historical sites: a modest wooden lodge built in 1889 for Tsar Alexander III, who was an enthusiastic salmon angler and had the lodge constructed specifically to fish the Kymi's salmon run. The Tsar fished here on several summer visits; the lodge (now a museum) is preserved largely as it was in the 1890s, in a forest setting on the riverbank above the rapids. The salmon run in the Kymi — Atlantic salmon ascending from the Gulf of Finland — still occurs, reduced from its historical levels but present, and recreational fishing in the rapids is permitted under licence. The Maretarium in the city harbour area is a freshwater and brackish-water aquarium housed in a lighthouse island, focusing on Finnish native fish species — pike, perch, zander, salmon, sea trout, and the Baltic species specific to the Gulf of Finland's brackish regime. The Finnish Maritime Museum, partly housed in vessels moored in the harbour, covers the history of Finnish seaborne trade and navy. The Kotka Maritime Festival (Meripäivät) is held in late July and claims to be the world's largest free maritime event — a figure that is contested but conveys the scale: over 200,000 visitors over the festival weekend, with historic vessels, maritime craft demonstrations, concerts, and a major maritime film programme. The Gulf of Finland at Kotka is microtidal: mean astronomical range 0.1 to 0.2 m. The Kymi river discharge is the dominant local influence on nearshore salinity and current at the city's harbour approaches; spring snowmelt periods (April to May) bring the highest freshwater discharge. Wind-driven sea-level changes and the seasonal Baltic water-level cycle dominate over astronomical tide throughout the year. Predictions on this page come from Open-Meteo Marine gridded model. The Finnish Meteorological Institute (FMI) operates a sea-level gauge at Kotka and publishes the authoritative sea-level data for the eastern Gulf of Finland.