AI-generatedKoh Lanta at a glance
- Best time
- Jan – Mar
- Warmest month
- Mar · 31°
- Warmest sea
- May · 30.4°
- Sunshine a year
- 2,070 h
- Rain a year
- 2,351 mm
- Climate
- Tropical
- Time zone
- UTC+7
- Elevation
- 51 m
Climate in Koh Lanta
Koh Lanta has a tropical climate: it is warm all year round, and the seasons differ mainly in how much rain falls. March is the warmest month with average highs of 31 °C, while September is the coolest at 28 °C. With around 2,070 hours of sunshine a year, Koh Lanta is moderately sunny; February is the sunniest month with 7.4 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Good
Best time to visit: January – March
Keep in mindFrequent rain
A typical day in October
- Morning, 08:00: about 26°
- Midday, 13:00: about 28°
- Afternoon, 16:00: about 28°
- Evening, 20:00: about 26°
- Night, 23:00: about 26°
06:1018:08
Warm enough for a T-shirt in the evening.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 05:57–06:38 · evening 17:40–18:21
- Blue hour
- Morning 05:49–05:57 · evening 18:21–18:29
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
What is the weather like in Koh Lanta in October?
In October, Koh Lanta is hot: daytime highs average 28 °C, and even at night it stays warm at around 25 °C. The sea averages 29.2 °C – almost as warm as a bath. Expect around 4 hours of sunshine a day. It is the rainy season: rain falls on about 28 days, totalling 339 mm. The air is often humid and muggy. All in all, October is a good month for a holiday in Koh Lanta.
More details for October
- Daylight
- 11 h 58 min06:10 – 18:08
- UV index
- 13 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 12 km/haverage daily peakAll months
- Cloud cover
- 88 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+7Asia/Bangkok
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- Sunshineweight 20 %22 %
- Few rainy daysweight 20 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Sea temperature in Koh Lanta
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 28.7 – 29.7 °C
Swimming season: All year
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Koh Lanta ranges from 28.5 °C in January to 30.4 °C in May. At 20 °C and more, the sea is warm enough for swimming all year round.
The sea warms up slowly: it is warmest in May, while the air already peaks in March. From April to December the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in May, eight out of ten years were between 29.6 and 31.0 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 28.5° | 28.1° | 28.9° | warm |
| FebruaryFeb | 28.9° | 28.5° | 29.3° | warm |
| MarchMar | 29.5° | 29.0° | 29.9° | very warm |
| AprilApr | 30.3° | 29.7° | 30.9° | very warm |
| MayMay | 30.4° | 29.6° | 31.0° | very warm |
| JuneJun | 30.1° | 29.8° | 30.6° | very warm |
| JulyJul | 29.8° | 29.4° | 30.2° | very warm |
| AugustAug | 29.8° | 29.4° | 30.2° | very warm |
| SeptemberSep | 29.4° | 28.9° | 29.8° | very warm |
| OctoberOct | 29.2° | 28.7° | 29.7° | very warm |
| NovemberNov | 29.1° | 28.4° | 29.8° | very warm |
| DecemberDec | 28.7° | 28.2° | 29.3° | warm |
Sunshine hours in Koh Lanta
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 4.3 of 12.0 hours of daylight in Koh Lanta, 36 % of the day.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
UV index in Koh Lanta
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 13 · extremeAvoid the midday sun; SPF 50+, covering clothes, hat and sunglasses.
The sun is strongest in April (UV 14).
Minutes until sunburn in October
- Very fair skin
- about 10 min
- Fair skin
- about 15 min
- Light brown skin
- about 20 min
- Olive skin
- about 25 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Rain in Koh Lanta: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Koh Lanta has about 28 rainy days with 339 mm of rain in total.
Wind and clouds in Koh Lanta
How breezy and how cloudy Koh Lanta is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Koh Lanta typically peaks at 12 km/h during the day: Beaufort 3, light breeze.
Breezy months for windsurfing and kiting
The daily breeze rarely reaches Beaufort 4 (20 km/h), so wind sports depend on single windy days.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 88 % of the sky over Koh Lanta: mostly overcast, with about 4.3 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat and humidity in Koh Lanta
How often the day gets hot in Koh Lanta (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Koh Lanta has about 0 hot days, with an average daytime high of 28 °C: often muggy. The air feels warmer than the thermometer says: light, airy clothes and slow days help.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Koh Lanta
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Hot 24° and more
- muggy month (10+ muggy days)
HotOctober: nights around 25°. Hot nights: air conditioning makes sleeping much easier. Muggy on about 31 days (dew point 18 °C or more).
The coolest nights are in January (25°), the warmest in May (26°). Nights stay tropical all year (20 °C and more), so a room with air conditioning or at least a fan pays off. It is muggy (dew point 18 °C or more) on about 365 days a year, mostly all year round.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 87 | 29° | 25° | 28.5° | 6.4 h | 7 | 49 |
| FebruaryFeb | 94 | 31° | 25° | 28.9° | 7.4 h | 5 | 31 |
| MarchMar | 85 | 31° | 26° | 29.5° | 7.3 h | 11 | 87 |
| AprilApr | 72 | 30° | 26° | 30.3° | 6.6 h | 22 | 166 |
| MayMay | 69 | 29° | 26° | 30.4° | 5.6 h | 27 | 259 |
| JuneJun | 69 | 29° | 26° | 30.1° | 5.6 h | 24 | 236 |
| JulyJul | 67 | 29° | 26° | 29.8° | 5.2 h | 24 | 246 |
| AugustAug | 67 | 28° | 26° | 29.8° | 5.2 h | 25 | 261 |
| SeptemberSep | 65 | 28° | 25° | 29.4° | 4.6 h | 26 | 300 |
| OctoberOct | 64 | 28° | 25° | 29.2° | 4.3 h | 28 | 339 |
| NovemberNov | 65 | 28° | 25° | 29.1° | 4.5 h | 23 | 258 |
| DecemberDec | 74 | 29° | 25° | 28.7° | 5.3 h | 13 | 119 |
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
7.53° N, 99.09° E · 51 m · Asia/Bangkok
Best time to visit Koh Lanta
The best time to visit Koh Lanta is from January to March. For a beach holiday with the sea above 21 °C, go from January to March. Rain is most frequent from April to December; the wettest month is October with 339 mm.
Koh Lanta through the seasons
How the weather changes over the seasons, with averages for each.
Koh Lanta in the dry season
Jan – Mar
Excellent
- 29–31 °C by day
- Sea 29 °C
- 7 h of sun a day
- 22 rainy days in all
Koh Lanta in the rainy season
Apr – Dec
Good
- 28–30 °C by day
- Sea 30 °C
- 5 h of sun a day
- 212 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Koh Lanta for you.
Your best months: January – March
Based on the climate averages; tap a month to see its details.
Compare two months in Koh Lanta
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
February has the better holiday weather in Koh Lanta: score 94 against 64. In February, days are 3 °C warmer than in October. The sea is about as warm in both months. February has 23 fewer rainy days. The sun shines 3 hours longer a day in February.
| Month | October | February |
|---|---|---|
| Weather score | 64 | 94better |
| Day high | 28° | 31° |
| Night low | 25° | 25° |
| Sea | 29.2° | 28.9° |
| Sunshine | 4.3 h | 7.4 hbetter |
| Rainy days | 28 | 5better |
| Rainfall | 339 mm | 31 mmbetter |
| Muggy days | 31 | 28better |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
Jan – Mar
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
No month
15–28 °C and not too much rain
Rainy months
Apr – Dec
12 or more rainy days
Koh Lanta month by month
The typical weather for every month at a glance.
87January29° · Sea 29° · 6 h
In January, Koh Lanta is hot: daytime highs average 29 °C, and even at night it stays warm at around 25 °C. The sea averages 28.5 °C – lovely and warm for swimming. Expect around 6 hours of sunshine a day. Rain falls on about 7 days, adding up to 49 mm. On about 9 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, January is an excellent month for a holiday in Koh Lanta.
Koh Lanta in January94February31° · Sea 29° · 7 h
In February, Koh Lanta is hot: daytime highs average 31 °C, and even at night it stays warm at around 25 °C. The sea averages 28.9 °C – lovely and warm for swimming. The sun shines for around 7 hours a day. Rain is rare: about 5 days bring 31 mm in total. On about 20 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, February is an excellent month for a holiday in Koh Lanta.
Koh Lanta in February85March31° · Sea 30° · 7 h
In March, Koh Lanta is hot: daytime highs average 31 °C, and even at night it stays warm at around 26 °C. The sea averages 29.5 °C – almost as warm as a bath. The sun shines for around 7 hours a day. Rain is frequent, with about 11 rainy days and 87 mm in total. On about 23 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, March is an excellent month for a holiday in Koh Lanta.
Koh Lanta in March72April30° · Sea 30° · 7 h
In April, Koh Lanta is hot: daytime highs average 30 °C, and even at night it stays warm at around 26 °C. The sea averages 30.3 °C – almost as warm as a bath. The sun shines for around 7 hours a day. It is the rainy season: rain falls on about 22 days, totalling 166 mm. On about 16 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, April is a good month for a holiday in Koh Lanta.
Koh Lanta in April69May29° · Sea 30° · 6 h
In May, Koh Lanta is hot: daytime highs average 29 °C, and even at night it stays warm at around 26 °C. The sea averages 30.4 °C – almost as warm as a bath. Expect around 6 hours of sunshine a day. It is the rainy season: rain falls on about 27 days, totalling 259 mm. On about 7 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, May is a good month for a holiday in Koh Lanta.
Koh Lanta in May69June29° · Sea 30° · 6 h
In June, Koh Lanta is hot: daytime highs average 29 °C, and even at night it stays warm at around 26 °C. The sea averages 30.1 °C – almost as warm as a bath. Expect around 6 hours of sunshine a day. It is the rainy season: rain falls on about 24 days, totalling 236 mm. The air is often humid and muggy. All in all, June is a good month for a holiday in Koh Lanta.
Koh Lanta in June67July29° · Sea 30° · 5 h
In July, Koh Lanta is hot: daytime highs average 29 °C, and even at night it stays warm at around 26 °C. The sea averages 29.8 °C – almost as warm as a bath. Expect around 5 hours of sunshine a day. It is the rainy season: rain falls on about 24 days, totalling 246 mm. The air is often humid and muggy. All in all, July is a good month for a holiday in Koh Lanta.
Koh Lanta in July67August28° · Sea 30° · 5 h
In August, Koh Lanta is hot: daytime highs average 28 °C, and even at night it stays warm at around 26 °C. The sea averages 29.8 °C – almost as warm as a bath. Expect around 5 hours of sunshine a day. It is the rainy season: rain falls on about 25 days, totalling 261 mm. The air is often humid and muggy. All in all, August is a good month for a holiday in Koh Lanta.
Koh Lanta in August65September28° · Sea 29° · 5 h
In September, Koh Lanta is hot: daytime highs average 28 °C, and even at night it stays warm at around 25 °C. The sea averages 29.4 °C – almost as warm as a bath. Expect around 5 hours of sunshine a day. It is the rainy season: rain falls on about 26 days, totalling 300 mm. The air is often humid and muggy. All in all, September is a good month for a holiday in Koh Lanta.
Koh Lanta in September64October28° · Sea 29° · 4 h
In October, Koh Lanta is hot: daytime highs average 28 °C, and even at night it stays warm at around 25 °C. The sea averages 29.2 °C – almost as warm as a bath. Expect around 4 hours of sunshine a day. It is the rainy season: rain falls on about 28 days, totalling 339 mm. The air is often humid and muggy. All in all, October is a good month for a holiday in Koh Lanta.
Koh Lanta in October65November28° · Sea 29° · 5 h
In November, Koh Lanta is hot: daytime highs average 28 °C, and even at night it stays warm at around 25 °C. The sea averages 29.1 °C – almost as warm as a bath. Expect around 5 hours of sunshine a day. It is the rainy season: rain falls on about 23 days, totalling 258 mm. The air is often humid and muggy. All in all, November is a good month for a holiday in Koh Lanta.
Koh Lanta in November74December29° · Sea 29° · 5 h
In December, Koh Lanta is hot: daytime highs average 29 °C, and even at night it stays warm at around 25 °C. The sea averages 28.7 °C – lovely and warm for swimming. Expect around 5 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 119 mm in total. The air is often humid and muggy. All in all, December is a good month for a holiday in Koh Lanta.
Koh Lanta in DecemberKoh Lanta compared
Put Koh Lanta side by side with another destination.
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Koh Lanta vs. Ao Nang
In October the holiday weather in Koh Lanta and Ao Nang is about equally good (score 64 vs. 64). During the day it is about as warm in Ao Nang as in Koh Lanta. The sea is about equally warm.
| in October | Koh Lanta | Ao Nang |
|---|---|---|
| Holiday score | 64 | 64 |
| Daytime high | 28° | 28° |
| Sea | 29° | 29° |
| Sunshine | 4 h | 4 h |
| Rainy days | 28 | 28 |
| Best time | Jan – Mar | Jan – Mar |
Through the year
Thailand in October: the best places
In October, Koh Lanta ranks 6 of 12 destinations in this country.
- Hua Hin29°29°67
- 2Pattaya30°30°67
- 3Koh Samui28°29°66
- 4Ko Pha-ngan25°29°66
- 5Koh Tao27°29°66
- 6Koh LantaThis page28°29°64
- 7Ao Nang28°29°64
- 8Phuket28°29°64
Planning a trip to Koh Lanta
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Koh Lanta in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Koh Lanta has its best school-holiday weather during the Christmas holidays (score 81) and its weakest during October half-term (score 64).
- 76
Easter holidays
Mar – Apr
Good
- 30 °C by day
- Sea 30 °C
- 6.8 h of sun a day
- 18 rainy days a month
Keep in mind: Frequent rain
- 69
May half-term
May – Jun
Good
- 29 °C by day
- Sea 30 °C
- 5.6 h of sun a day
- 26 rainy days a month
Keep in mind: Frequent rain
- 67
Summer holidays
Jul – Aug
Good
- 28 °C by day
- Sea 30 °C
- 5.2 h of sun a day
- 25 rainy days a month
Keep in mind: Frequent rain
- 64
October half-term
Oct
Good
- 28 °C by day
- Sea 29 °C
- 4.3 h of sun a day
- 28 rainy days a month
Keep in mind: Frequent rain
- 81
Christmas holidays
Dec – Jan
ExcellentBest holidays
- 29 °C by day
- Sea 29 °C
- 5.9 h of sun a day
- 10 rainy days a month
Keep in mind: Frequent rain
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 12 h 35 min
- Distance
- 10,010 km
- Time zone
- UTC+7
- Jet lag
- About 6 days (6 h east)
Rule of thumb for flying east: for a few days before, go to bed and get up a little earlier, and get plenty of morning light at your destination.
Most routes need a change of planes, which adds time.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Frequently asked questions about Koh Lanta
When is the best time to visit Koh Lanta?
The best time to visit Koh Lanta is from January to March. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Koh Lanta?
The sea temperature in Koh Lanta ranges from 28.5 °C in January to 30.4 °C in May. At 20 °C and more, the sea is warm enough for swimming all year round.
Can you swim in Koh Lanta in October?
Yes. In October the sea averages 29.2 °C – almost as warm as a bath.
What is the warmest month in Koh Lanta?
March is the warmest month, with average highs of 31 °C and nights around 26 °C. September is the coolest month at 28 °C.
When does it rain most in Koh Lanta?
Rain is most frequent from April to December; the wettest month is October with 339 mm. The driest month is February with 31 mm.
How many hours of sunshine does Koh Lanta get?
Koh Lanta gets around 2,070 hours of sunshine a year. The sunniest month is February with 7.4 hours a day; in October there are 4.3 hours a day.
What time zone is Koh Lanta in?
Koh Lanta uses the time zone Asia/Bangkok, at UTC+7 all year.
How long is the flight from London to Koh Lanta?
A nonstop flight from London to Koh Lanta takes about 12 h 35 min, for a straight-line distance of about 10,010 km. Most routes need a change of planes, which adds time.
Which school holidays are best for Koh Lanta?
Koh Lanta has its best school-holiday weather during the Christmas holidays (score 81) and its weakest during October half-term (score 64). Holiday ratings (0–100): Easter holidays 76, May half-term 69, Summer holidays 67, October half-term 64, Christmas holidays 81.
Near Koh Lanta
Other destinations close by.
Places with a climate like Koh Lanta
Destinations whose weather through the year is closest to Koh Lanta's – good alternatives.