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Ko Lanta Weather in May
Thinking of visiting Ko Lanta in May? Expect very high temperatures reaching 31°C (88°F) during the day, dropping to 27°C (81°F) at night. Heavy showers are common during the rainy season.
Rainfall in Ko Lanta in May
Ko Lanta is in the rainy season in May, with rain on around 20 days and an average of 268 mm (11 in). Rainfall this month is frequent and tends to be fairly heavy when it does fall. Packing waterproofs is a good idea.
Temperature in Ko Lanta in May
Daytime highs in Ko Lanta in May reach 31°C (88°F), with nights around 27°C (81°F). Sunshine and humidity can make it feel even warmer than the raw temperature suggests. With overnight lows of 27°C (81°F), nights stay very warm. Air conditioning makes a real difference if you're sensitive to heat. A cold shower before bed can also help you get to sleep more comfortably.
Sunshine in Ko Lanta in May
The month brings about 114 hours of sunlight, offering a comfortable mix of sun and rainy moments.Our weather planner can help you find worldwide destinations with pleasant weather during this period. February typically offers the best weather for Ko Lanta.
Ko Lanta Temperature in May
Min Temperature
27°C (81°F)
Max Temperature
31°C (88°F)
Chance of Rain
68%
Precipitation
268 mm (11 in)
Rainy days
20 days
Humidity
85%
Sunshine
114 hours
Percentage Sunshine
Ko Lanta Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ko Lanta - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Ko Lanta typically stay consistent throughout May, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather records for Ko Lanta in May
Browse day-by-day weather records for Ko Lanta spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Ko Lanta historical weather extremes in May
Based on 50 years of weather observations (1976-2026), these are the most extreme conditions recorded in Ko Lanta.
- Ko Lanta recorded its highest May temperature of 38°C (100°F) on May 8, 1979.
- On May 20, 2026, Ko Lanta saw its coldest May day with temperatures maxing out at 26°C (79°F).
- Nighttime temperatures dropped to 22°C (72°F) on May 6, 2017, marking the coldest May night on record.
Best Places in Thailand in May
Find out more about the weather in Thailand and which places have the best travel conditions in this month. See all of Thailand in May →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Ko Lanta in May
Warm but pleasant conditions in Ko Lanta in May. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. Sunglasses could come in handy during the sunnier parts of your trip.
What To Do in Ko Lanta in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Ko Lanta 3-Day Forecast
More climate data for Ko Lanta
Temperature Rainfall Sunshine Humidity
See the full Ko Lanta climate overview or explore weather in Thailand.
Popular in May
Where to go in May - average daytime high across popular destinations.
Bangkok
36°C (97°F) Chiang Mai
36°C (97°F) Jomtien Beach
33°C (91°F) Hua Hin33°C (91°F) Ao Nang Beach31°C (88°F) Koh Samui31°C (88°F) Ko Lanta31°C (88°F) Patong Beach30°C (86°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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