Over the next 10 days Gdynia tops out around 73° (Friday) and dips to 55° on the coolest night (Monday). Roughly 1.0 in of rain falls over the period, with Saturday the most likely wet day (90%). Hold onto the patio furniture Thursday: gusts could hit 34 mph. Right now Gdynia is about 9° cooler than nearby Bydgoszcz. Longer view: four distinct seasons, with the biggest swings between high summer and midwinter.
Gdynia, Poland · 54.52°N, 18.53°E · Europe/Warsaw · Forecast computed for these exact coordinates