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

Join Norwegian Cruise Line (NCL)'s Norwegian Sun for a 10-night voyage on the Baltic from Helsinki to London: Germany, Sweden & Poland route, setting out from Helsinki, Finland on October 2, 2026. It's a classic Northern Europe cruise. Travelers sailing in October can generally expect cold, short days. Ports of call include Helsinki, Finland, Tallinn, Estonia, Nynashamn, Sweden, with 6 more along the way. The forecasts below break the weather down port by port.

1. Day 1 — Friday, Oct 2, 2026 — Helsinki, Finland

   Helsinki, Finland is a scheduled port of call on day 1 of the 10-night Baltic from Helsinki to London: Germany, Sweden & Poland cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 53°F.

2. Day 2 — Saturday, Oct 3, 2026 — Tallinn, Estonia

   Tallinn, Estonia is a scheduled port of call on day 2 of the 10-night Baltic from Helsinki to London: Germany, Sweden & Poland cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 54°F.

3. Day 3 — Sunday, Oct 4, 2026 — Nynashamn, Sweden

   Nynashamn, Sweden is a scheduled port of call on day 3 of the 10-night Baltic from Helsinki to London: Germany, Sweden & Poland cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 54°F.

4. Day 4 — Monday, Oct 5, 2026 — Riga, Latvia

   Riga, Latvia is a scheduled port of call on day 4 of the 10-night Baltic from Helsinki to London: Germany, Sweden & Poland cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 55°F.

5. Day 5 — Tuesday, Oct 6, 2026 — Klaipeda, Lithuania

   Klaipeda, Lithuania is a scheduled port of call on day 5 of the 10-night Baltic from Helsinki to London: Germany, Sweden & Poland cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 56°F.

6. Day 6 — Wednesday, Oct 7, 2026 — Gdynia, Poland

   Gdynia, Poland is a scheduled port of call on day 6 of the 10-night Baltic from Helsinki to London: Germany, Sweden & Poland cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 58°F.

7. Day 7 — Thursday, Oct 8, 2026 — Warnemunde, Germany

   Warnemunde, Germany is a scheduled port of call on day 7 of the 10-night Baltic from Helsinki to London: Germany, Sweden & Poland cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 58°F.

8. Day 8 — Friday, Oct 9, 2026 — Copenhagen, Denmark

   Copenhagen, Denmark is a scheduled port of call on day 8 of the 10-night Baltic from Helsinki to London: Germany, Sweden & Poland cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 56°F.

9. Day 9 — Monday, Oct 12, 2026 — Southampton, England

   Southampton, England is a scheduled port of call on day 9 of the 10-night Baltic from Helsinki to London: Germany, Sweden & Poland cruise on Norwegian Sun. Expected weather: partially cloudy with highs near 61°F.