March 18 is statistically one of the best days of the year in St. Lucia. With minimal rain risk (10%) and pleasant highs of 28°C, it's ideal for outdoor adventures. St. Lucia is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for St. Lucia
Currency
XCD
$ Eastern Caribbean dollar
Language
English
Driving
Left side
St. Lucia Weather Forecast for March 18
"Warm & Sunny. Expect average highs of 27.6°C. 10% chance of rain."
What to Wear in St. Lucia in March
Based on historical data for March 18, St. Lucia typically experiences temperatures between 22°C and 27.6°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (10% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for St. Lucia
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
27.6°C
Daytime Peak
Average Low
22°C
Nighttime Low
Feels Like
30°C
🔥 Feels warmer
Rain Chance
10%
Avg 0.8mm if it rains
Cloud Cover
43%
Light drizzle
Pressure
1014.7 hPa
Low volatility
St. Lucia Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ This date historically delivers consistent weather 76% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
06:00 - 10:00
16:00 - 18:00
Type I-II
🔴 19 min to burn
Type III-IV
🟡 29 min to burn
Type V-VI
🟢 48 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
21.9°C
Humid/Sticky
Heat Index
30°C
Feels hotter
😐 Best outdoor time:
Morning hours (before 11 AM)
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Saint Lucia
Flight Traffic
High
100/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~10
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in St. Lucia
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:10
☀️ Noon
12:13
🌇 Sunset
18:15
⏱️ Daylight
12h 4m
Wind Speed
23.1 km/h
Moderate wind
Sunshine
11.3 hrs
Direct Sun (Cloud-free)
Humidity
71%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for St. Lucia
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in St. Lucia
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 excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Moderate seismic activity. Occasional tremors possible.
Atlantic Hurricane Risk
Season: Jun - Nov
"According to 30YearWeather's analysis of 30 years of NASA satellite data, St. Lucia on March 18 averages 27.6°C with a 10% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
St. Lucia 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 St. Lucia Worth Visiting on March 18?
Planning a trip to St. Lucia 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 27.6°C with a 10% historical precipitation risk.
✈️ Travel Logistics: Approximately 10 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 8 vaccinations are recommended for Saint Lucia, including COVID-19.
📊 Historical Extremes: The hottest March 18 recorded in the last 30 years saw temperatures hit 29.4°C in 2024, while the coldest dropped to 20.6°C in 2017.