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

The Norwegian Sun sails a 9-night Baltic from Copenhagen to Helsinki: Germany, Norway & Sweden itinerary with Norwegian Cruise Line (NCL), departing Copenhagen, Denmark on September 5, 2026. 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. Use the day-by-day forecast below to plan what to pack for each stop.

1. Day 1 — Saturday, Sep 5, 2026 — Copenhagen, Denmark

   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.

2. Day 2 — Sunday, Sep 6, 2026 — Oslo, Norway

   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.

3. Day 3 — Monday, Sep 7, 2026 — At Sea

   Day 3 of 10 is a day at sea aboard Norwegian Sun, cruising between ports on the Baltic from Copenhagen to Helsinki: Germany, Norway & Sweden itinerary.

4. Day 4 — Tuesday, Sep 8, 2026 — Warnemunde, Germany

   Warnemunde, Germany 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.

5. Day 5 — Wednesday, Sep 9, 2026 — Gdynia, Poland

   Gdynia, Poland 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.

6. Day 6 — Thursday, Sep 10, 2026 — Visby, Sweden

   Visby, Sweden 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.

7. Day 7 — Friday, Sep 11, 2026 — Riga, Latvia

   Riga, Latvia 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.

8. Day 8 — Saturday, Sep 12, 2026 — Nynashamn, Sweden

   Nynashamn, Sweden 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.

9. Day 9 — Sunday, Sep 13, 2026 — Tallinn, Estonia

   Tallinn, Estonia 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.

10. Day 10 — Monday, Sep 14, 2026 — Helsinki, Finland

    Helsinki, Finland is a scheduled port of call on day 10 of the 9-night Baltic from Copenhagen to Helsinki: Germany, Norway & Sweden cruise on Norwegian Sun.