August 21 is generally a great time to visit Melbourne. While there is a slight chance of rain (28%), showers are usually brief. Expect comfortable 15°C weather. As it's peak season for Melbourne, we recommend booking your stay well in advance to secure the best rates.
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Essential Travel Info for Melbourne
Currency
AUD
$ Australian dollar
Language
English
Driving
Left side
Connect
The main post office in Melbourne's CBD ...
Safety
High Safety
GPI: 1.565
Melbourne Weather Forecast for August 21
"Mild & Comfortable. Expect average highs of 14.7°C. 28% chance of rain."
What to Wear in Melbourne in August
Based on historical data for August 21, Melbourne typically experiences temperatures between 7°C and 14.7°C. We recommend packing light jacket, long pants to stay comfortable. With a 28% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Melbourne
Smart Suitcase
- Light Jacket
- Long Pants
Average High
14.7°C
Daytime Peak
Average Low
7°C
Nighttime Low
Feels Like
14.6°C
🌤️ Feels accurate
Rain Chance
28%
Avg 1.5mm if it rains
Cloud Cover
58%
Overcast
Pressure
1018.2 hPa
High volatility
Melbourne Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 85% 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
🔴 57 min to burn
Type III-IV
🟡 86 min to burn
Type V-VI
🟢 143 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
10.1°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
97/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~480
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Melbourne
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:59
☀️ Noon
13:24
🌇 Sunset
18:50
⏱️ Daylight
10h 50m
Wind Speed
21.6 km/h
Moderate wind
Sunshine
8.0 hrs
Direct Sun (Cloud-free)
Humidity
74%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Melbourne
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 Melbourne
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🔴 Very Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Rapid pressure changes detected. High risk for meteosensitive people.
Weather unlikely to affect joint pain.
Fish are active due to pressure changes.
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, Melbourne on August 21 averages 14.7°C with a 28% precipitation probability. Wedding/Outdoor Event Score: 89/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Melbourne Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
August 25
14.9°C • 16% rain
Score
93
August 23
14.8°C • 27% rain
Score
91
August 14
14.4°C • 17% rain
Score
90
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (August 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Melbourne Worth Visiting on August 21?
Planning a trip to Melbourne 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 14.7°C with a 28% historical precipitation risk.
✈️ Travel Logistics: Approximately 480 landing slots available daily during this period, indicating peak tourist activity.
💉 Health Advisory: 6 vaccinations are recommended for Australia, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 12°C (polar plunge). Wave conditions are generally lake-like with heights around 0.44m.
📊 Historical Extremes: The hottest August 21 recorded in the last 30 years saw temperatures hit 18.9°C in 2025, while the coldest dropped to 3.2°C in 2022.