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Loading Travel Forecast…Loading Travel Forecast…Loading Travel Forecast…Departing Copenhagen, Denmark on September 23, 2026, the Norwegian Cruise Line (NCL) ship Norwegian Sun runs this 9-night Baltic from Copenhagen to Helsinki: Germany, Norway & Sweden sailing. It's a classic Northern Europe cruise. Travelers sailing in September can generally expect cold, short days. Ports of call include Copenhagen, Denmark, Oslo, Norway, Warnemunde, Germany, with 6 more along the way. Scroll the daily outlook below to pack smart for every port of call.
Copenhagen, Denmark is a scheduled port of call on day 1 of the 9-night Baltic from Copenhagen to Helsinki: Germany, Norway & Sweden cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 61°F.
Oslo, Norway is a scheduled port of call on day 2 of the 9-night Baltic from Copenhagen to Helsinki: Germany, Norway & Sweden cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 60°F.
Warnemunde, Germany is a scheduled port of call on day 3 of the 9-night Baltic from Copenhagen to Helsinki: Germany, Norway & Sweden cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 63°F.
Gdynia, Poland is a scheduled port of call on day 4 of the 9-night Baltic from Copenhagen to Helsinki: Germany, Norway & Sweden cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 63°F.
Klaipeda, Lithuania is a scheduled port of call on day 5 of the 9-night Baltic from Copenhagen to Helsinki: Germany, Norway & Sweden cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 59°F.
Riga, Latvia is a scheduled port of call on day 6 of the 9-night Baltic from Copenhagen to Helsinki: Germany, Norway & Sweden cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 59°F.
Nynashamn, Sweden is a scheduled port of call on day 7 of the 9-night Baltic from Copenhagen to Helsinki: Germany, Norway & Sweden cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 56°F.
Tallinn, Estonia is a scheduled port of call on day 8 of the 9-night Baltic from Copenhagen to Helsinki: Germany, Norway & Sweden cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 55°F.
Helsinki, Finland is a scheduled port of call on day 9 of the 9-night Baltic from Copenhagen to Helsinki: Germany, Norway & Sweden cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 53°F.
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