May 21 is generally a great time to visit Gdańsk. While there is a slight chance of rain (23%), showers are usually brief. Expect comfortable 18°C weather. As it's peak season for Gdańsk, we recommend booking your stay well in advance to secure the best rates.
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Essential Travel Info for Gdańsk
Currency
PLN
zł Polish złoty
Language
Polish
Driving
Right side
Connect
Gdańsk provides an extensive network of ...
Safety
High Safety
GPI: 1.552
Gdańsk Weather Forecast for May 21
"Mild & Comfortable. Expect average highs of 17.6°C. 23% chance of rain."
What to Wear in Gdańsk in May
Based on historical data for May 21, Gdańsk typically experiences temperatures between 9.1°C and 17.6°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (23% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Gdańsk
Smart Suitcase
- Light Jacket
- Long Pants
Average High
17.6°C
Daytime Peak
Average Low
9.1°C
Nighttime Low
Feels Like
17.6°C
🌤️ Feels accurate
Rain Chance
23%
Avg 1.1mm if it rains
Cloud Cover
56%
Overcast
Pressure
1014.8 hPa
Medium volatility
Gdańsk Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 92% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
03:00 - 09:30
16:00 - 19:00
Type I-II
🔴 20 min to burn
Type III-IV
🟡 30 min to burn
Type V-VI
🟢 50 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
12.7°C
Pleasant
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
❄️ Cold Water Hazard
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Poland
Flight Traffic
High
80/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~88
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Gdańsk
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
03:33
☀️ Noon
11:43
🌇 Sunset
19:53
⏱️ Daylight
16h 20m
Wind Speed
18.9 km/h
Gentle breeze
Sunshine
12.0 hrs
Direct Sun (Cloud-free)
Humidity
73%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Gdańsk
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Gdańsk
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Gdańsk on May 21 averages 17.6°C with a 23% precipitation probability. Wedding/Outdoor Event Score: 90/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Gdańsk Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
May 24
17.9°C • 22% rain
Score
93
May 25
18.1°C • 24% rain
Score
93
May 26
18.5°C • 30% rain
Score
92
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (May 21) in other destinations
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📍 Is Gdańsk Worth Visiting on May 21?
Planning a trip to Gdańsk on May 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 17.6°C with a 23% historical precipitation risk.
✈️ Travel Logistics: Approximately 88 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 8 vaccinations are recommended for Poland, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 11.4°C (polar plunge). Wave conditions are generally fun waves with heights around 0.59m.
📊 Historical Extremes: The hottest May 21 recorded in the last 30 years saw temperatures hit 22°C in 2025, while the coldest dropped to 5.3°C in 2020.