9-Night Cruise on Norwegian SunBaltic from Helsinki to Copenhagen: Germany, Sweden & Poland - Weather

Departing Helsinki, Finland on September 14, 2026, the Norwegian Cruise Line (NCL) ship Norwegian Sun runs this 9-night Baltic from Helsinki to Copenhagen: Germany, Sweden & Poland sailing. It's a classic Northern Europe cruise. Travelers sailing in September can generally expect cold, short days. Ports of call include Helsinki, Finland, Tallinn, Estonia, Nynashamn, Sweden, with 6 more along the way. Scroll the daily outlook below to pack smart for every port of call.

1. Day 1 — Monday, Sep 14, 2026 — Helsinki, Finland

   Helsinki, Finland is a scheduled port of call on day 1 of the 9-night Baltic from Helsinki to Copenhagen: Germany, Sweden & Poland cruise on Norwegian Sun.

2. Day 2 — Tuesday, Sep 15, 2026 — Tallinn, Estonia

   Tallinn, Estonia is a scheduled port of call on day 2 of the 9-night Baltic from Helsinki to Copenhagen: Germany, Sweden & Poland cruise on Norwegian Sun.

3. Day 3 — Wednesday, Sep 16, 2026 — Nynashamn, Sweden

   Nynashamn, Sweden is a scheduled port of call on day 3 of the 9-night Baltic from Helsinki to Copenhagen: Germany, Sweden & Poland cruise on Norwegian Sun.

4. Day 4 — Thursday, Sep 17, 2026 — Riga, Latvia

   Riga, Latvia is a scheduled port of call on day 4 of the 9-night Baltic from Helsinki to Copenhagen: Germany, Sweden & Poland cruise on Norwegian Sun.

5. Day 5 — Friday, Sep 18, 2026 — Klaipeda, Lithuania

   Klaipeda, Lithuania is a scheduled port of call on day 5 of the 9-night Baltic from Helsinki to Copenhagen: Germany, Sweden & Poland cruise on Norwegian Sun.

6. Day 6 — Saturday, Sep 19, 2026 — Gdynia, Poland

   Gdynia, Poland is a scheduled port of call on day 6 of the 9-night Baltic from Helsinki to Copenhagen: Germany, Sweden & Poland cruise on Norwegian Sun.

7. Day 7 — Sunday, Sep 20, 2026 — Warnemunde, Germany

   Warnemunde, Germany is a scheduled port of call on day 7 of the 9-night Baltic from Helsinki to Copenhagen: Germany, Sweden & Poland cruise on Norwegian Sun.

8. Day 8 — Monday, Sep 21, 2026 — Kiel, Germany

   Kiel, Germany is a scheduled port of call on day 8 of the 9-night Baltic from Helsinki to Copenhagen: Germany, Sweden & Poland cruise on Norwegian Sun.

9. Day 9 — Tuesday, Sep 22, 2026 — Copenhagen, Denmark

   Copenhagen, Denmark is a scheduled port of call on day 9 of the 9-night Baltic from Helsinki to Copenhagen: Germany, Sweden & Poland cruise on Norwegian Sun.