May 20 is generally a great time to visit Nuku'alofa. While there is a slight chance of rain (16%), showers are usually brief. Expect comfortable 25°C weather. Nuku'alofa is seeing high visitor numbers, so iconic spots may be busier than usual.
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Essential Travel Info for Nuku'alofa
Currency
TOP
T$ Tongan paʻanga
Language
English
+1 more
Driving
Left side
Nuku'alofa Weather Forecast for May 20
"Warm & Sunny. Expect average highs of 25.1°C. 16% chance of rain."
What to Wear in Nuku'alofa in May
Based on historical data for May 20, Nuku'alofa typically experiences temperatures between 23.4°C and 25.1°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (16% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Nuku'alofa
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
25.1°C
Daytime Peak
Average Low
23.4°C
Nighttime Low
Feels Like
25.9°C
☀️ Feels accurate
Rain Chance
16%
Avg 1.4mm if it rains
Cloud Cover
62%
Light drizzle
Pressure
1014.8 hPa
Low volatility
Nuku'alofa Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 81% 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
🔴 200 min to burn
Type III-IV
🟡 300 min to burn
Type V-VI
🟢 500 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
20.1°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 Tonga
Flight Traffic
Busy
75/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~3
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Nuku'alofa
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:06
☀️ Noon
12:38
🌇 Sunset
18:10
⏱️ Daylight
11h 3m
Wind Speed
28.9 km/h
Moderate wind
Sunshine
8.8 hrs
Direct Sun (Cloud-free)
Humidity
74%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Nuku'alofa
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 Nuku'alofa
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 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
Very high seismic risk. Ring of Fire territory.
Travel Alert: This region has elevated natural risks. We recommend registering with your embassy and keeping emergency numbers handy.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Nuku'alofa on May 20 averages 25.1°C with a 16% precipitation probability. Wedding/Outdoor Event Score: 90/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Nuku'alofa Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
May 16
25.1°C • 19% rain
Score
91
May 17
25.1°C • 18% rain
Score
91
May 18
25.1°C • 19% rain
Score
91
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (May 20) in other destinations
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📍 Is Nuku'alofa Worth Visiting on May 20?
Planning a trip to Nuku'alofa on May 20? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 25.1°C with a 16% historical precipitation risk.
✈️ Travel Logistics: Approximately 3 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Tonga, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 26.2°C (tropical bath). Wave conditions are generally surfers only with heights around 1.68m.
📊 Historical Extremes: The hottest May 20 recorded in the last 30 years saw temperatures hit 27.6°C in 2024, while the coldest dropped to 22.2°C in 2019.