August 11 is statistically one of the best days of the year in Porto. With minimal rain risk (3%) and pleasant highs of 26°C, it's ideal for outdoor adventures. Porto is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Porto
Currency
EUR
€ Euro
Language
Portuguese
Driving
Right side
Connect
Porto has 4G from all Portuguese carrier...
Safety
Very High Safety
GPI: 1.301
Porto Weather Forecast for August 11
"Warm & Sunny. Expect average highs of 25.8°C. 3% chance of rain."
What to Wear in Porto in August
Based on historical data for August 11, Porto typically experiences temperatures between 17.1°C and 25.8°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (3% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Porto
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
25.8°C
Daytime Peak
Average Low
17.1°C
Nighttime Low
Feels Like
26.8°C
☀️ Minor difference
Rain Chance
3%
Avg 0.1mm if it rains
Cloud Cover
32%
Overcast
Pressure
1016.7 hPa
Low volatility
Porto Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 87% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 10:00
16:00 - 19:00
Type I-II
🔴 15 min to burn
Type III-IV
🟡 23 min to burn
Type V-VI
🟢 38 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
21°C
Humid/Sticky
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Morning hours (before 11 AM)
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
⚠️ Mixed Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Portugal
Flight Traffic
High
100/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~244
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Porto
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:41
☀️ Noon
12:41
🌇 Sunset
19:41
⏱️ Daylight
14h 0m
Wind Speed
18.8 km/h
Gentle breeze
Sunshine
12.2 hrs
Direct Sun (Cloud-free)
Humidity
75%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Porto
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 Porto
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🔴 Very Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Porto on August 11 averages 25.8°C with a 3% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Porto Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (August 11) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Porto Worth Visiting on August 11?
Planning a trip to Porto on August 11? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 25.8°C with a 3% historical precipitation risk.
✈️ Travel Logistics: Approximately 244 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 6 vaccinations are recommended for Portugal, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 18.3°C (refreshing tonic). Wave conditions are generally fun waves with heights around 1.18m.
📊 Historical Extremes: The hottest August 11 recorded in the last 30 years saw temperatures hit 32.1°C in 2016, while the coldest dropped to 14.7°C in 2021.