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Koh Lanta, Thailand · Equatorial tropical

Koh Lanta: best months to visit

January (5.8/10) · May (4.8/10).

📅 Data updated: October 2026 🛰️ ERA5 · 10 years 📍 7.53°N · 99.04°E
⚡ Quick answer
January
Depends on your goals
5.8/10
☀️ Jan
Top score (5.8/10)
🌤️ Feb
Alt. (5.7/10)
May
Plus rude (4.8/10)
🌴 Tropical☀️ High UV🌧️ Monsoon season
Photo par Sergey Dapkus via Unsplash
Decide

When to visit Koh Lanta?

The decision rests on several criteria. Climate score, tourist crowds and feasible activities.

Verdict: In Koh Lanta, January and February clearly stand out. May concentrates the least favorable conditions.
Top & avoid
🏆 January · 5.8 February · 5.7 March · 5.5 December · 5.5 ⚠️ May · 4.8
5.8
Jan
5.7
Feb
5.5
Mar
5.2
Apr
4.8
May
5.0
Jun
5.2
Jul
5.1
Aug
5.0
Sep
4.9
Oct
4.9
Nov
5.5
Dec
Best period · ≥ 7 Decent period · 4 – 7 Tough conditions · < 4

What you grasp in 5 seconds

Koh Lanta offers 0 comfortable months, without any month really to avoid. The gap stays moderate: 5.8 in January vs 4.8 in May.

What to check next

Your tolerance for crowds and budget. The best months concentrate tourist saturation and higher prices. Shoulder seasons offer a good compromise.

Next action

Scroll down to the detailed table to compare month by month, then open the page of the month that interests you.

Compare the 12 months By your project

How we calculate the score

The score combines 4 weighted criteria using 10 years of real climate data (ERA5).

Source : ERA5 · Open-Meteo · 10 years (2016–2025) · Full methodology →

Understand

Compare all 12 months

Month-by-month details: temperature, rain, sunshine, score and verdict.

✅ 0 comfortable months ()
MonthT° minT° maxRain %mm/daySunScoreVerdict
🌥️ January →77°F88°F16%2.4mm7.6h5.8/10Decent period
🌥️ February →77°F90°F10%1.0mm8.1h5.7/10Decent period
🌥️ March →79°F90°F14%1.8mm7.8h5.5/10Decent period
🌥️ April →79°F88°F33%4.3mm6.5h5.2/10Decent period
🌥️ May →79°F86°F52%8.3mm5.2h4.8/10Decent period
🌥️ June →79°F86°F42%7.9mm5.9h5.0/10Decent period
🌥️ July →79°F86°F38%6.6mm5.9h5.2/10Decent period
🌥️ August →79°F84°F47%8.1mm5.7h5.1/10Decent period
🌥️ September →79°F84°F51%10.8mm5.4h5.0/10Decent period
🌥️ October →77°F84°F54%10.7mm4.9h4.9/10Decent period
🌥️ November →77°F84°F51%8.1mm4.8h4.9/10Decent period
🌥️ December →77°F86°F24%4.1mm7.0h5.5/10Decent period
🌥️ January
5.8/10
T°77°F / 88°F
Rain %16%
Sun7.6h
Decent period
🌥️ February
5.7/10
T°77°F / 90°F
Rain %10%
Sun8.1h
Decent period
🌥️ March
5.5/10
T°79°F / 90°F
Rain %14%
Sun7.8h
Decent period
🌥️ April
5.2/10
T°79°F / 88°F
Rain %33%
Sun6.5h
Decent period
🌥️ May
4.8/10
T°79°F / 86°F
Rain %52%
Sun5.2h
Decent period
🌥️ June
5.0/10
T°79°F / 86°F
Rain %42%
Sun5.9h
Decent period
🌥️ July
5.2/10
T°79°F / 86°F
Rain %38%
Sun5.9h
Decent period
🌥️ August
5.1/10
T°79°F / 84°F
Rain %47%
Sun5.7h
Decent period
🌥️ September
5.0/10
T°79°F / 84°F
Rain %51%
Sun5.4h
Decent period
🌥️ October
4.9/10
T°77°F / 84°F
Rain %54%
Sun4.9h
Decent period
🌥️ November
4.9/10
T°77°F / 84°F
Rain %51%
Sun4.8h
Decent period
🌥️ December
5.5/10
T°77°F / 86°F
Rain %24%
Sun7.0h
Decent period
📊 Quick read
Optimal window
No month > 7
Good transition
—
Tough period
none
🌡️ Detailed conditions (January)
🌡️ Feel
Humid heat
☀️ UV
7.8 · Moderate-Strong
💧 Humidity feel
72°F · Oppressive
☔ Rain
16% · 2.4 mm/day
🌅 Sunshine
7.6h/day
Week by week

Koh Lanta week by week: your odds of avoiding rain

For each week of the year: in how many years out of 10 it was mostly dry (at most 2 rainy days), 2016 to 2025.

Safest week: Jan 29 to Feb 4, mostly dry in 10 years out of 10 (0.4 rainy day(s) on average).

Most exposed: Nov 5 to Nov 11, mostly dry in 1 years out of 10 (4.3 rainy days on average).

Number = years out of 10 with at most 2 rainy days in the week. Source: ERA5 reanalysis (ECMWF) via Open-Meteo, daily data 2016-2025. Rainy day = at least 1 mm, as everywhere on the site.
JanJan 18/1086°FJan 89/1087°FJan 157/1087°FJan 228/1087°FJan 2910/1088°F
FebFeb 59/1089°FFeb 129/1089°FFeb 199/1089°FFeb 2610/1090°F
MarMar 59/1090°FMar 129/1091°FMar 198/1090°FMar 267/1089°F
AprApr 28/1088°FApr 97/1089°FApr 167/1089°FApr 234/1088°FApr 305/1087°F
MayMay 74/1087°FMay 141/1087°FMay 212/1086°FMay 281/1086°F
JunJun 44/1086°FJun 116/1086°FJun 182/1085°FJun 254/1085°F
JulJul 26/1085°FJul 93/1085°FJul 165/1085°FJul 236/1085°FJul 306/1085°F
AugAug 61/1085°FAug 135/1085°FAug 203/1084°FAug 272/1084°F
SepSep 33/1084°FSep 103/1084°FSep 174/1084°FSep 242/1084°F
OctOct 11/1084°FOct 83/1084°FOct 151/1084°FOct 223/1084°FOct 292/1084°F
NovNov 51/1084°FNov 125/1085°FNov 191/1084°FNov 263/1083°F
DecDec 36/1085°FDec 108/1085°FDec 179/1085°FDec 249/1086°F

A specific date? The app computes the same figure day by day.

10-year trend

Annual temperatures — Koh Lanta

Min/max temperature curves observed over the past 10 years (ERA5). Shows climate stability and trend.

T° maxT° meanT° min75°79°82°86°90°201620172018201920202021202220232024202587°F — decade peak (2024)+0.70°F / decade
Tailor

For your trip

A few angles depending on what kind of trip you are planning.

🌞 Dry season🏖️ Beaches🌊 Surf
Book

Plan your trip

Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.

🏨
Stay
Hotels & rentals · Koh Lanta
Expedia →
🎟️
Activities
Tours, tickets, experiences
See ↓
✈️
Flights
Multi-airline comparator
Kiwi →

🎟️ Activities & tours · Koh Lanta

GetYourGuide selection · free cancellation

See all →
Affiliate link · GetYourGuide
Practical info

What you need to know before you go

Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a tropical stay.

Country · Thailand

🗣️LanguageThai
💶CurrencyThai Baht (฿)
🚗DrivingLeft-hand
🛡️Safety ⓘSafe · 2/5
💰Cost of living ⓘCheap · 2/5

🌡️ Climate

🌍Climate typeEquatorial tropical
📈Climate trend ⓘStable
🔥Hottest monthFebruary · 90°F
❄️Coolest monthAugust · 84°F
🌧️Rainiest month ⓘOctober · 54%

🏝️ Tropical stay

🌞Dry season ⓘMay → Sep
🌧️Wet season ⓘDec → Mar
🌀Cyclones ⓘNone (equator)
Explore

Related destinations & guides

If this destination doesn't fit your dates, here are alternatives and guides.

Similar climate destinations

Koh Phi Phi · Thailand→Phuket · Thailand→Krabi · Thailand→Langkawi · Malaysia→

Nearby destinations

Koh Samui · Thailand153 mi →Penang · Malaysia171 mi →Koh Tao · Thailand186 mi →Ipoh · Malaysia246 mi →

Guides & rankings

World ranking 2026See →
Best summer destinationsSee →
Winter sunSee →
Where to go in JulySee →
Location

Where is Koh Lanta ?

Global position + regional geographic context.

🌍 World
🔍 Geographic context
Equatorial tropical climate with a 5.8 → 4.8 gap between best and worst month. 10 years of ERA5 data to choose by project.
7.53°N · 99.04°E
Questions

Frequently asked questions

What is the best time to visit Koh Lanta?
January is the best month with 88°F highs, 77°F lows, 7.6h of sunshine and 16.0% rainy days.
How many hours of sunshine does Koh Lanta get in January?
Koh Lanta averages 7.6 sunshine hours per day in January. It is the sunniest month with a climate score of 5.6/10.
What is the rainiest month in Koh Lanta?
May is the most unfavourable month with May has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Koh Lanta in January?
In January, overnight lows reach 77°F, while afternoon highs average 88°F.
Is Koh Lanta good in winter?
In winter (December-February), Koh Lanta scores 5.5/10 on average — Acceptable conditions for cultural visits.. The best month overall remains January with a score of 5.6/10.
When should you avoid Koh Lanta?
May is the most difficult month to visit Koh Lanta, with May has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.