Forecast for Baltic Sea valid 24 hours from 07:00 UTC Sep 20 to 07:00 UTC Sep 21, 2026. Warnings: Northern Baltic: southwest 13, in gusts to 17 m/s. Wave height 2-3.5 m. Gulf of Finland: southwest 16, in gusts to 22 m/s. Wave height 1.5-3.5 m. Northern Gulf of Riga, Vainameri: southwest 15, in gusts to 20 m/s. Wave height 1.5-3 m, in Vainameri 1-1.7 m. Weather summary: an edge of secondary Low moving from northern part of Bothnia to Lapland is over Baltic Sea. At night next trough is moving from Scandinavia to Baltic Sea Northern Baltic: southwest 9-13, in gusts to 17 m/s, in afternoon decreasing, at night southwest, west wind 7-11, in gusts to 15 m/s, after midnight veering northwest. Wave height by day 2-3,5 m. In forenoon showers locally, in afternoon and at night in many places. Visibility moderate to good. Gulf of Finland: in forenoon southwest 10-14, in gusts to 19, after starting from west decreasing 7-12, in gusts to 15 m/s, towards morning from western part veering northwest and decreasing. Wave height 1.5-3.5 m. In forenoon in eastern part rain, in afternoon dry, since evening rain. Visibility moderate to good. Northern Gulf of Riga, Vainameri: southwest 7-12, in morning in gusts to 18 m/s, in afternoon decreasing, at night southwest, west 6-10, in gusts 13 m/s. Wave height in forenoon 1-2.5 m, in Vainameri 0.7-1.2 m. Rain in many places, by day shortly reducing, at night rain. Visibility moderate.
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