Ko Samui keeps UTC+7 all year. There is no daylight saving time, so the clock never changes.
Ko Samui and your time
Ko Samui at a glance
| Country | Thailand |
|---|---|
| Region | Surat Thani |
| Time zone | Asia/Bangkok |
| UTC offset now | UTC+7 |
| Daylight saving time | Not observed |
| Coordinates | 9.54° N, 99.94° E |
Time zone in Ko Samui
Ko Samui follows the Asia/Bangkok time zone and stays on UTC+7 all year. The tz database records no daylight saving time here since 1970.
All of Thailand keeps the same time, so Ko Samui reads the same clock as Bangkok.
Clock changes in Ko Samui, 2026 and 2027
No clock changes are scheduled in Ko Samui for 2026 or 2027.
How far ahead or behind Ko Samui is
Take 9:00 AM in Ko Samui: the clock reads 9:00 PM (previous day) in New York, 1:00 PM in Sydney and 6:00 PM (previous day) in Los Angeles.
| City | Time now | Difference now | In January | In July | Shared office hours |
|---|---|---|---|---|---|
| New York (United States) | --:-- | 12 h behind | 12 h behind | 11 h behind | None |
| Los Angeles (United States) | --:-- | 15 h behind | 15 h behind | 14 h behind | None |
| London (United Kingdom) | --:-- | 7 h behind | 7 h behind | 6 h behind | 1 h |
| Paris (France) | --:-- | 6 h behind | 6 h behind | 5 h behind | 2 h |
| Dubai (United Arab Emirates) | --:-- | 3 h behind | 3 h behind | 3 h behind | 5 h |
| Mumbai (India) | --:-- | 1 h 30 min behind | 1 h 30 min behind | 1 h 30 min behind | 6 h 30 min |
| Singapore | --:-- | 1 h ahead | 1 h ahead | 1 h ahead | 7 h |
| Tokyo (Japan) | --:-- | 2 h ahead | 2 h ahead | 2 h ahead | 6 h |
| Sydney (Australia) | --:-- | 4 h ahead | 4 h ahead | 3 h ahead | 4 h |
| UTC | --:-- | 7 h behind | 7 h behind | 7 h behind | 1 h |
Because Ko Samui keeps one offset all year, any change in the gap comes from the other city’s daylight saving time. Compare the January and July columns.
Shared office hours is the part of a 9 AM to 5 PM local working day that both cities have in common. Weekends are not taken into account.
Sunrise and sunset in Ko Samui
Today
| Sunrise | --:-- |
|---|---|
| Sunset | --:-- |
| Day length | -- |
| Solar noon | --:-- |
Close to the equator, days in Ko Samui last between 11 hours 34 minutes and 12 hours 41 minutes, so evenings get dark at about the same time all year.
Daylight through the year in Ko Samui
| Date | Sunrise | Sunset | Day length | |
|---|---|---|---|---|
| March equinox | March 20 | 6:25 AM | 6:31 PM | 12 h 6 min |
| June solstice | June 21 | 6:02 AM | 6:42 PM | 12 h 41 min |
| September equinox | September 23 | 6:09 AM | 6:16 PM | 12 h 6 min |
| December solstice | December 22 | 6:32 AM | 6:06 PM | 11 h 34 min |
Clock time and sun time in Ko Samui
Ko Samui lies close to the centre of its time zone, so the sun is highest at about 12:20 PM on standard time, close to clock noon.
Places close to Ko Samui
All the places listed below keep the same time as Ko Samui.
| City | Distance | Time now | Difference |
|---|---|---|---|
| Surat Thani | 79 km (49 mi) | --:-- | Same time |
| Nakhon Si Thammarat | 123 km (76 mi) | --:-- | Same time |
| Chumphon | 135 km (84 mi) | --:-- | Same time |
| Ranong | 150 km (93 mi) | --:-- | Same time |
| Krabi | 198 km (123 mi) | --:-- | Same time |
| Phatthalung | 214 km (133 mi) | --:-- | Same time |
| Trang | 223 km (139 mi) | --:-- | Same time |
| Phuket | 249 km (155 mi) | --:-- | Same time |
More cities in Thailand
- Bangkok
- Samut Prakan
- Chon Buri
- Hat Yai
- Si Racha
- Lampang
- Surat Thani
- Udon Thani
- Chiang Mai
- Nakhon Ratchasima
- Hua Hin
- Ubon Ratchathani
All time zones and cities in Thailand
Tools for time in Ko Samui
- Convert a time to or from Ko Samui: pick a date and time and see it in every city on your list.
- Add Ko Samui to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in Ko Samui and the other cities you work with.
- Open a full-screen clock for your own time zone.
Frequently asked questions
What time zone is Ko Samui in?
Ko Samui uses the Asia/Bangkok time zone, which is UTC+7 all year.
Does Ko Samui use daylight saving time?
No. Ko Samui stays on UTC+7 all year, so the time difference to places without daylight saving time never changes.
What is the time difference between Ko Samui and New York?
Ko Samui is 12 hours ahead of New York in January and 11 hours ahead of New York in July, because New York moves its clocks for daylight saving time and Ko Samui does not.
Is Ko Samui on the same time as Bangkok?
Yes. Ko Samui and Bangkok both use UTC+7 right now.
How long is the longest day in Ko Samui?
About 12 hours 41 minutes, around the June solstice. The shortest day, around the December solstice, has about 11 hours 34 minutes of daylight.
Time zone rules: IANA tz database, version 2026e. Place names and coordinates: GeoNames. Sunrise and sunset are calculated from the coordinates and can differ by a minute or two from local almanacs.