March 18 is statistically one of the best days of the year in Cape Town. With minimal rain risk (7%) and pleasant highs of 26°C, it's ideal for outdoor adventures. Cape Town is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Cape Town
Currency
ZAR
R South African rand
Language
Afrikaans
+10 more
Driving
Left side
Connect
Many carriers (especially in Europe) cha...
Safety
Moderate Safety
GPI: 2.283
Cape Town Weather Forecast for March 18
"Warm & Sunny. Expect average highs of 26°C. 7% chance of rain."
What to Wear in Cape Town in March
Based on historical data for March 18, Cape Town typically experiences temperatures between 15.9°C and 26°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (7% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Cape Town
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
26°C
Daytime Peak
Average Low
15.9°C
Nighttime Low
Feels Like
26.9°C
☀️ Feels accurate
Rain Chance
7%
Avg 0.1mm if it rains
Cloud Cover
30%
Overcast
Pressure
1014.6 hPa
Low volatility
Cape Town Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
06:00 - 10:00
16:00 - 19:00
Type I-II
🔴 21 min to burn
Type III-IV
🟡 32 min to burn
Type V-VI
🟢 53 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
20.3°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
❄️ Cold Water Hazard
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in South Africa
Flight Traffic
High
93/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~124
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Cape Town
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:48
☀️ Noon
12:55
🌇 Sunset
19:02
⏱️ Daylight
12h 13m
Wind Speed
21.4 km/h
Moderate wind
Sunshine
10.8 hrs
Direct Sun (Cloud-free)
Humidity
71%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Cape Town
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 Cape Town
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟢 Moderate
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Cape Town on March 18 averages 26°C with a 7% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Cape Town Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (March 18) in other destinations
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📍 Is Cape Town Worth Visiting on March 18?
Planning a trip to Cape Town on March 18? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 26°C with a 7% historical precipitation risk.
✈️ Travel Logistics: Approximately 124 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 9 vaccinations are recommended for South Africa, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 15°C (polar plunge). Wave conditions are generally surfers only with heights around 2.24m.
📊 Historical Extremes: The hottest March 18 recorded in the last 30 years saw temperatures hit 36.6°C in 2025, while the coldest dropped to 13.1°C in 2024.