Ko Samui
Sunrise and sunset in Ko Samui
Today’s sunrise, sunset and twilight in Ko Samui, in local time. At 9.5° N, the day lasts from 11 h 34 min at the winter solstice to 12 h 41 min at the summer solstice.
Today · worked out at
Thursday, October 22: sunrise at 06:08, sunset at 18:00.
Day length 11 h 52 min, 29 s shorter than yesterday.
Solar noon at 12:04, with the Sun 69° above the horizon.
Times are Ko Samui time (GMT+7).
Twilight and golden hour today
| Today | Morning | Evening |
|---|---|---|
| Astronomical twilight | 04:58 | 19:11 |
| Nautical twilight | 05:22 | 18:46 |
| Civil twilight | 05:47 | 18:21 |
| Sunrise and sunset | 06:08 | 18:00 |
| Golden hour | 06:08–06:37 | 17:32–18:00 |
Each twilight begins at the morning time and ends at the evening one.
The year in Ko Samui
- Longest day: June 21, 12 h 41 min, from sunrise at 06:01 to sunset at 18:42.
- Shortest day: December 22, 11 h 34 min, from sunrise at 06:31 to sunset at 18:05.
Sunrise and sunset on the 21st of each month, 2026
| Date | Sunrise | Sunset | Day length |
|---|---|---|---|
| January 21 | 06:41 | 18:21 | 11 h 39 min |
| February 21 | 06:37 | 18:30 | 11 h 52 min |
| March 21 | 06:24 | 18:31 | 12 h 07 min |
| April 21 | 06:07 | 18:30 | 12 h 23 min |
| May 21 | 05:59 | 18:34 | 12 h 36 min |
| June 21 | 06:01 | 18:42 | 12 h 41 min |
| July 21 | 06:08 | 18:44 | 12 h 36 min |
| August 21 | 06:11 | 18:35 | 12 h 23 min |
| September 21 | 06:09 | 18:17 | 12 h 08 min |
| October 21 | 06:08 | 18:00 | 11 h 52 min |
| November 21 | 06:16 | 17:55 | 11 h 39 min |
| December 21 | 06:31 | 18:05 | 11 h 34 min |
Good to know
- Sunrise and sunset are when the top of the Sun meets a level horizon, allowing for the usual bending of light by the air. Hills, buildings and height shift what you see by a few minutes.
- Civil, nautical and astronomical twilight end when the Sun is 6°, 12° and 18° below the horizon. Golden hour here is the photographers’ usual definition: the Sun less than 6° above it.
- Worked out when the page loads from NOAA’s solar equations, for 9.5° N, 99.9° E, and accurate to about a minute.
How the layers work, where their data comes from and what they can’t tell you: Day and night, live, The Sun, Moon and planets
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