August 21 is generally a great time to visit Adelaide. While there is a slight chance of rain (26%), showers are usually brief. Expect comfortable 15°C weather. Expect a bustling atmosphere in Adelaide right now—this is when the city truly comes alive with visitors.
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Essential Travel Info for Adelaide
Currency
AUD
$ Australian dollar
Language
English
Driving
Left side
Connect
There is extensive free Wi-Fi access (po...
Safety
High Safety
GPI: 1.565
Adelaide Weather Forecast for August 21
"Mild & Comfortable. Expect average highs of 14.9°C. 26% chance of rain."
What to Wear in Adelaide in August
Based on historical data for August 21, Adelaide typically experiences temperatures between 8.8°C and 14.9°C. We recommend packing light jacket, long pants to stay comfortable. With a 26% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Adelaide
Smart Suitcase
- Light Jacket
- Long Pants
Average High
14.9°C
Daytime Peak
Average Low
8.8°C
Nighttime Low
Feels Like
14.9°C
🌤️ Feels accurate
Rain Chance
26%
Avg 1.2mm if it rains
Cloud Cover
48%
Light drizzle
Pressure
1019.6 hPa
Medium volatility
Adelaide Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 88% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 50 min to burn
Type III-IV
🟡 75 min to burn
Type V-VI
🟢 125 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
10.5°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 Australia
Flight Traffic
High
92/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~134
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Adelaide
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
08:21
☀️ Noon
13:50
🌇 Sunset
19:19
⏱️ Daylight
10h 58m
Wind Speed
23 km/h
Moderate wind
Sunshine
8.7 hrs
Direct Sun (Cloud-free)
Humidity
75%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Adelaide
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Adelaide
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🔴 Very 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, Adelaide on August 21 averages 14.9°C with a 26% precipitation probability. Wedding/Outdoor Event Score: 92/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Adelaide Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
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📍 Is Adelaide Worth Visiting on August 21?
Planning a trip to Adelaide on August 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 14.9°C with a 26% historical precipitation risk.
✈️ Travel Logistics: Approximately 134 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 6 vaccinations are recommended for Australia, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 13.3°C (polar plunge). Wave conditions are generally fun waves with heights around 0.83m.
📊 Historical Extremes: The hottest August 21 recorded in the last 30 years saw temperatures hit 18.4°C in 2025, while the coldest dropped to 7.5°C in 2018.