The month in detail
What to expect in September
Autumn in Gdańsk is often underrated: 19°C, golden light and declining crowds. An interesting window. Expect rain on 27% of days — a light raincoat in the bag is recommended. A good balance between weather and crowds, even if August (7.9/10) remains theoretically better.
September ranks 4 out of 12 months in Gdańsk. Compared to August: −3°C daytime, −1.5h of sun per day.
This month's conditions
What it's like in September
UV index
4 · moderate
protect during midday hours
Feels like
comfortable
11°
Sea
18°C
cool, invigorating
Daylight
12.4h of daylight
Air quality
good
AQI 26
Compare
Is September the right month?
The best month in Gdańsk is August (7.9/10), 0.4 pt higher than September.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Gdańsk
Expedia →
Activities
Tours, tickets, experiences
See ↓
Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Gdańsk
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach holiday.
Country · Poland
🗣️LanguagePolish
💶CurrencyPolish Zloty (zł)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘCheap · 2/5
🌡️ Climate
🌍Climate typeTemperate oceanic
📈Climate trend ⓘStable
🔥Hottest monthJuly · 22°C
❄️Coolest monthJanuary · 3°C
🌧️Rainiest month ⓘJuly · 37%
🏖️ Beach holiday
📅Peak seasonJuin → Sept
🏖️Swell (Sept–Mar) ⓘModérée
🛂VisaSchengen · 90 days
Explore
Other destinations in September
If September doesn't convince you for this destination, compare with others.
Location
Where is Gdańsk ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
PolandTemperate oceanic climate with a 7.9 → 0.8 gap between best and worst month. 10 years of ERA5 data to choose by project.
54.35°N · 18.65°E
Questions
Frequently asked questions
What is the best time to visit Gdańsk?
August is the best month with 22.0°C highs, 15.0°C lows, 7.3h of sunshine and 30.0% rainy days. The months of August & June offer comparable conditions.
How many hours of sunshine does Gdańsk get in August?
Gdańsk averages 7.3 sunshine hours per day in August. It is the sunniest month with a climate score of 7.4/10.
What is the rainiest month in Gdańsk?
January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Gdańsk in August?
In August, overnight lows reach 15.0°C, while afternoon highs average 22.0°C.
Is Gdańsk good in winter?
In winter (December-February), Gdańsk scores 0.8/10 on average — Difficult period — prefer the peak season.. The best month overall remains August with a score of 7.4/10.
When should you avoid Gdańsk?
January is the most difficult month to visit Gdańsk, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Gdańsk in September?
In September, the sea averages 18°C in Gdańsk: cool, invigorating. Swimming is possible but brisk; sensitive swimmers may prefer a wetsuit.
Do you need sun protection in Gdańsk in September?
The average UV index reaches 4 in September in Gdańsk (moderate), with about 12.4h of daylight. Protect during midday hours.