AI-generatedKoh Tao at a glance
- Best time
- Dec – Apr
- Warmest month
- May · 29°
- Warmest sea
- May · 30.3°
- Sunshine a year
- 2,310 h
- Rain a year
- 1,672 mm
- Climate
- Tropical
- Time zone
- UTC+7
- Elevation
- 95 m
Climate in Koh Tao
Koh Tao has a tropical climate: it is warm all year round, and the seasons differ mainly in how much rain falls. May is the warmest month with average highs of 29 °C, while January is the coolest at 27 °C. With around 2,310 hours of sunshine a year, Koh Tao is sunny; March is the sunniest month with 8.2 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Good
Best time to visit: December – April
Keep in mindFrequent rain
A typical day in October
- Morning, 08:00: about 26°
- Midday, 13:00: about 27°
- Afternoon, 16:00: about 27°
- Evening, 20:00: about 26°
- Night, 23:00: about 26°
06:0918:04
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 05:56–06:37 · evening 17:36–18:17
- Blue hour
- Morning 05:48–05:56 · evening 18:17–18:25
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 Tao in October?
In October, Koh Tao is hot: daytime highs average 27 °C, and even at night it stays warm at around 26 °C. The sea averages 29.0 °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 296 mm. The air is often humid and muggy. All in all, October is a good month for a holiday in Koh Tao.
More details for October
- Daylight
- 11 h 55 min06:09 – 18:04
- UV index
- 12 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 21 km/haverage daily peakAll months
- Cloud cover
- 83 %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 %32 %
- 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 Tao
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 28.5 – 29.6 °C
Swimming season: All year
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Koh Tao ranges from 27.7 °C in January to 30.3 °C in May. At 20 °C and more, the sea is warm enough for swimming all year round.
The sea temperature varies from year to year: in May, eight out of ten years were between 29.6 and 31.2 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 27.7° | 26.9° | 28.7° | warm |
| FebruaryFeb | 28.1° | 27.4° | 28.7° | warm |
| MarchMar | 29.0° | 28.3° | 29.4° | very warm |
| AprilApr | 30.0° | 29.4° | 30.6° | very warm |
| MayMay | 30.3° | 29.6° | 31.2° | very warm |
| JuneJun | 29.8° | 29.2° | 30.5° | very warm |
| JulyJul | 29.4° | 28.9° | 29.9° | very warm |
| AugustAug | 29.2° | 28.8° | 29.7° | very warm |
| SeptemberSep | 29.1° | 28.5° | 29.7° | very warm |
| OctoberOct | 29.0° | 28.5° | 29.6° | very warm |
| NovemberNov | 28.6° | 27.9° | 29.4° | warm |
| DecemberDec | 27.9° | 27.2° | 28.8° | warm |
Sunshine hours in Koh Tao
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 4.9 of 11.9 hours of daylight in Koh Tao, 41 % 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 Tao
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 12 · 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 Tao: 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 Tao has about 26 rainy days with 296 mm of rain in total.
Wind and clouds in Koh Tao
How breezy and how cloudy Koh Tao 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 Tao typically peaks at 21 km/h during the day: Beaufort 4, moderate breeze.
Breezy months for windsurfing and kiting
From Beaufort 4 (20 km/h) the daily breeze is usually enough for windsurfing and often for kiting: May – Mar.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 83 % of the sky over Koh Tao: mostly overcast, with about 4.9 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 Tao
How often the day gets hot in Koh Tao (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 Tao has about 0 hot days, with an average daytime high of 27 °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 Tao
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 26°. 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 (26°), the warmest in April (27°). 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 364 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 | 88 | 27° | 26° | 27.7° | 7.1 h | 8 | 66 |
| FebruaryFeb | 94 | 27° | 26° | 28.1° | 7.8 h | 6 | 38 |
| MarchMar | 92 | 28° | 27° | 29.0° | 8.2 h | 8 | 77 |
| AprilApr | 84 | 29° | 27° | 30.0° | 8.0 h | 13 | 102 |
| MayMay | 72 | 29° | 27° | 30.3° | 6.5 h | 22 | 160 |
| JuneJun | 70 | 29° | 27° | 29.8° | 5.9 h | 20 | 121 |
| JulyJul | 67 | 28° | 26° | 29.4° | 5.2 h | 20 | 121 |
| AugustAug | 69 | 28° | 26° | 29.2° | 5.6 h | 19 | 118 |
| SeptemberSep | 66 | 28° | 26° | 29.1° | 4.9 h | 23 | 168 |
| OctoberOct | 66 | 27° | 26° | 29.0° | 4.9 h | 26 | 296 |
| NovemberNov | 68 | 27° | 26° | 28.6° | 5.4 h | 20 | 270 |
| DecemberDec | 81 | 27° | 26° | 27.9° | 6.4 h | 11 | 134 |
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
10.10° N, 99.84° E · 95 m · Asia/Bangkok
Best time to visit Koh Tao
The best time to visit Koh Tao is from December to April. For a beach holiday with the sea above 21 °C, go from December to March. For sightseeing, day trips and hiking, conditions are most comfortable from December to March. Rain is most frequent from April to November; the wettest month is October with 296 mm.
Koh Tao through the seasons
How the weather changes over the seasons, with averages for each.
Koh Tao in the dry season
Dec – Mar
Excellent
- 27–28 °C by day
- Sea 28 °C
- 7 h of sun a day
- 33 rainy days in all
Koh Tao in the rainy season
Apr – Nov
Good
- 27–29 °C by day
- Sea 29 °C
- 6 h of sun a day
- 163 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Koh Tao for you.
Your best months: January – March
Based on the climate averages; tap a month to see its details.
Compare two months in Koh Tao
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 Tao: score 94 against 66. Daytime highs are about the same. The sea is 1 °C cooler in February. February has 20 fewer rainy days. The sun shines 3 hours longer a day in February.
| Month | October | February |
|---|---|---|
| Weather score | 66 | 94better |
| Day high | 27° | 27° |
| Night low | 26° | 26° |
| Sea | 29.0° | 28.1° |
| Sunshine | 4.9 h | 7.8 hbetter |
| Rainy days | 26 | 6better |
| Rainfall | 296 mm | 38 mmbetter |
| Muggy days | 31 | 28better |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
Dec – Mar
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Dec – Mar
15–28 °C and not too much rain
Rainy months
Apr – Nov
12 or more rainy days
Koh Tao month by month
The typical weather for every month at a glance.
88January27° · Sea 28° · 7 h
In January, Koh Tao is warm: daytime highs average 27 °C, and even at night it stays warm at around 26 °C. The sea averages 27.7 °C – lovely and warm for swimming. The sun shines for around 7 hours a day. Rain falls on about 8 days, adding up to 66 mm. The air is often humid and muggy. All in all, January is an excellent month for a holiday in Koh Tao.
Koh Tao in January94February27° · Sea 28° · 8 h
In February, Koh Tao is warm: daytime highs average 27 °C, and even at night it stays warm at around 26 °C. The sea averages 28.1 °C – lovely and warm for swimming. The sun shines for around 8 hours a day. Rain falls on about 6 days, adding up to 38 mm. The air is often humid and muggy. All in all, February is an excellent month for a holiday in Koh Tao.
Koh Tao in February92March28° · Sea 29° · 8 h
In March, Koh Tao is hot: daytime highs average 28 °C, and even at night it stays warm at around 27 °C. The sea averages 29.0 °C – almost as warm as a bath. The sun shines for around 8 hours a day. Rain falls on about 8 days, adding up to 77 mm. The air is often humid and muggy. All in all, March is an excellent month for a holiday in Koh Tao.
Koh Tao in March84April29° · Sea 30° · 8 h
In April, Koh Tao is hot: daytime highs average 29 °C, and even at night it stays warm at around 27 °C. The sea averages 30.0 °C – almost as warm as a bath. The sun shines for around 8 hours a day. Rain is frequent, with about 13 rainy days and 102 mm in total. The air is often humid and muggy. All in all, April is an excellent month for a holiday in Koh Tao.
Koh Tao in April72May29° · Sea 30° · 7 h
In May, Koh Tao is hot: daytime highs average 29 °C, and even at night it stays warm at around 27 °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 160 mm. The air is often humid and muggy. All in all, May is a good month for a holiday in Koh Tao.
Koh Tao in May70June29° · Sea 30° · 6 h
In June, Koh Tao is hot: daytime highs average 29 °C, and even at night it stays warm at around 27 °C. The sea averages 29.8 °C – almost as warm as a bath. Expect around 6 hours of sunshine a day. It is the rainy season: rain falls on about 20 days, totalling 121 mm. The air is often humid and muggy. All in all, June is a good month for a holiday in Koh Tao.
Koh Tao in June67July28° · Sea 29° · 5 h
In July, Koh Tao is hot: daytime highs average 28 °C, and even at night it stays warm at around 26 °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 20 days, totalling 121 mm. The air is often humid and muggy. All in all, July is a good month for a holiday in Koh Tao.
Koh Tao in July69August28° · Sea 29° · 6 h
In August, Koh Tao is hot: daytime highs average 28 °C, and even at night it stays warm at around 26 °C. The sea averages 29.2 °C – almost as warm as a bath. Expect around 6 hours of sunshine a day. It is the rainy season: rain falls on about 19 days, totalling 118 mm. The air is often humid and muggy. All in all, August is a good month for a holiday in Koh Tao.
Koh Tao in August66September28° · Sea 29° · 5 h
In September, Koh Tao is hot: daytime highs average 28 °C, and even at night it stays warm at around 26 °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 168 mm. The air is often humid and muggy. All in all, September is a good month for a holiday in Koh Tao.
Koh Tao in September66October27° · Sea 29° · 5 h
In October, Koh Tao is hot: daytime highs average 27 °C, and even at night it stays warm at around 26 °C. The sea averages 29.0 °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 296 mm. The air is often humid and muggy. All in all, October is a good month for a holiday in Koh Tao.
Koh Tao in October68November27° · Sea 29° · 5 h
In November, Koh Tao is hot: daytime highs average 27 °C, and even at night it stays warm at around 26 °C. The sea averages 28.6 °C – lovely and warm for swimming. Expect around 5 hours of sunshine a day. It is the rainy season: rain falls on about 20 days, totalling 270 mm. The air is often humid and muggy. All in all, November is a good month for a holiday in Koh Tao.
Koh Tao in November81December27° · Sea 28° · 6 h
In December, Koh Tao is warm: daytime highs average 27 °C, and even at night it stays warm at around 26 °C. The sea averages 27.9 °C – lovely and warm for swimming. Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 134 mm in total. The air is often humid and muggy. All in all, December is an excellent month for a holiday in Koh Tao.
Koh Tao in DecemberKoh Tao compared
Put Koh Tao side by side with another destination.
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Koh Tao vs. Ko Pha-ngan
In October the holiday weather in Koh Tao and Ko Pha-ngan is about equally good (score 66 vs. 66). During the day Ko Pha-ngan is 2 °C cooler than Koh Tao. The sea is about equally warm.
| in October | Koh Tao | Ko Pha-ngan |
|---|---|---|
| Holiday score | 66 | 66 |
| Daytime high | 27° | 25° |
| Sea | 29° | 29° |
| Sunshine | 5 h | 5 h |
| Rainy days | 26 | 26 |
| Best time | Dec – Apr | Dec – Apr |
Through the year
Thailand in October: the best places
In October, Koh Tao ranks 3 of 12 destinations in this country.
- Hua Hin29°29°67
- 2Pattaya30°30°67
- 3Koh TaoThis page27°29°66
- 4Ko Pha-ngan25°29°66
- 5Koh Samui28°29°66
- 6Khao Lak28°29°64
- 7Ao Nang28°29°64
- 8Phuket28°29°64
Planning a trip to Koh Tao
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Koh Tao 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 Tao has its best school-holiday weather during the Easter holidays (score 86) and its weakest during October half-term (score 66).
- 86
Easter holidays
Mar – Apr
ExcellentBest holidays
- 28 °C by day
- Sea 30 °C
- 8.1 h of sun a day
- 11 rainy days a month
Keep in mind: Frequent rain
- 72
May half-term
May – Jun
Good
- 29 °C by day
- Sea 30 °C
- 6.4 h of sun a day
- 22 rainy days a month
Keep in mind: Frequent rain
- 68
Summer holidays
Jul – Aug
Good
- 28 °C by day
- Sea 29 °C
- 5.5 h of sun a day
- 20 rainy days a month
Keep in mind: Frequent rain
- 66
October half-term
Oct
Good
- 27 °C by day
- Sea 29 °C
- 4.9 h of sun a day
- 26 rainy days a month
Keep in mind: Frequent rain
- 85
Christmas holidays
Dec – Jan
Excellent
- 27 °C by day
- Sea 28 °C
- 6.8 h of sun a day
- 10 rainy days a month
Good for: Beach & swimming, Sightseeing & walks
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 12 h 20 min
- Distance
- 9,830 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 Tao
When is the best time to visit Koh Tao?
The best time to visit Koh Tao is from December to April. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Koh Tao?
The sea temperature in Koh Tao ranges from 27.7 °C in January to 30.3 °C in May. At 20 °C and more, the sea is warm enough for swimming all year round.
Can you swim in Koh Tao in October?
Yes. In October the sea averages 29.0 °C – almost as warm as a bath.
What is the warmest month in Koh Tao?
May is the warmest month, with average highs of 29 °C and nights around 27 °C. January is the coolest month at 27 °C.
When does it rain most in Koh Tao?
Rain is most frequent from April to November; the wettest month is October with 296 mm. The driest month is February with 38 mm.
How many hours of sunshine does Koh Tao get?
Koh Tao gets around 2,310 hours of sunshine a year. The sunniest month is March with 8.2 hours a day; in September there are 4.9 hours a day.
What time zone is Koh Tao in?
Koh Tao uses the time zone Asia/Bangkok, at UTC+7 all year.
How long is the flight from London to Koh Tao?
A nonstop flight from London to Koh Tao takes about 12 h 20 min, for a straight-line distance of about 9,830 km. Most routes need a change of planes, which adds time.
Which school holidays are best for Koh Tao?
Koh Tao has its best school-holiday weather during the Easter holidays (score 86) and its weakest during October half-term (score 66). Holiday ratings (0–100): Easter holidays 86, May half-term 72, Summer holidays 68, October half-term 66, Christmas holidays 85.
Near Koh Tao
Other destinations close by.
Places with a climate like Koh Tao
Destinations whose weather through the year is closest to Koh Tao's – good alternatives.