Ko Samui Weather Today · 7-Day Forecast
Grey Sky Settles Over the Town
Cloud lies thick and low. The light is dim and the air is still.
Warmest Friday at 29° · coldest night Friday at 27°
The short of it: Ko Samui weather on Monday, 9 November 2026: local time, 28 °C (82 °F) with an overcast sky, feeling like 33 °C (91 °F). Today’s high 29 °C (84 °F), low 28 °C (82 °F). Chance of rain 90% in the next 24 hours, about 13 mm (0.52 in). Warnings in force: thunder & hail, tropical night, heavy rain. Source: Wanted Weather forecast service (global weather models), updated 08:15 local time.
KO SAMUI, Monday. — Folk about town may expect thunderstorms today, the mercury reaching near 29° and falling to 28° after dark. That is about what a November day usually brings here, where the long-run average high is 30°. Barely a breath of wind stirs from the E, gusting to 19 km/h, and the glass is falling — a change is coming.
Looking over the next 7 days, our correspondent reckons Friday the pick at about 29°, while Friday night will be the coldest at 27°. Rain or snow is due on 7 of them, some 148 mm in all. Nights run 4° milder than the November norm of 24°.
For travellers weighing a journey, the Almanac shows a typical November in Ko Samui brings highs near 30°, lows of 24° and about 372 mm of rain over the month. May is the warmest month here at 33°, January the coldest at 23°, and November the wettest with 372 mm. The best months to ride in are February and December.
The sun is up 11 h 44 min today, and the days are shortening by about 1 minutes each. The station stands 0 m above the sea.
The Hours to Come
Temperature by the hour · rain & snow in the hour beneathThe hour-by-hour ledger
| Hour | Sky | Temp | Feels | Wind | Rain |
|---|---|---|---|---|---|
| Now | Light showers | 28° | 33° | 9 km/h | 0.3 mm |
| 9 AM | Overcast | 28° | 33° | 9 km/h | 0.2 mm |
| 10 AM | Light showers | 28° | 33° | 8 km/h | 0.4 mm |
| 11 AM | Thunderstorm | 28° | 34° | 8 km/h | 1.2 mm |
| 12 PM | Thunderstorm | 28° | 33° | 8 km/h | 1.6 mm |
| 1 PM | Light showers | 28° | 34° | 7 km/h | 1.3 mm |
| 2 PM | Light showers | 28° | 33° | 7 km/h | 0.3 mm |
| 3 PM | Light showers | 28° | 33° | 8 km/h | 0.4 mm |
| 4 PM | Overcast | 28° | 33° | 9 km/h | 0.2 mm |
| 5 PM | Overcast | 28° | 33° | 9 km/h | 0.1 mm |
| 6 PM | Overcast | 29° | 33° | 10 km/h | – |
| 7 PM | Overcast | 29° | 33° | 9 km/h | 0.1 mm |
| 8 PM | Overcast | 29° | 34° | 8 km/h | – |
| 9 PM | Light showers | 28° | 34° | 8 km/h | 0.5 mm |
| 10 PM | Thunderstorm | 28° | 34° | 7 km/h | 1.1 mm |
| 11 PM | Thunderstorm | 28° | 34° | 6 km/h | 1.3 mm |
| 12 AM | Thunderstorm | 28° | 34° | 6 km/h | 1.0 mm |
| 1 AM | Light showers | 28° | 34° | 7 km/h | 1.1 mm |
| 2 AM | Light showers | 28° | 33° | 7 km/h | 0.7 mm |
| 3 AM | Light showers | 28° | 33° | 8 km/h | 0.4 mm |
| 4 AM | Overcast | 28° | 33° | 7 km/h | – |
| 5 AM | Overcast | 28° | 33° | 8 km/h | – |
| 6 AM | Overcast | 28° | 33° | 9 km/h | 0.2 mm |
| 7 AM | Thunderstorm | 28° | 33° | 9 km/h | 0.8 mm |
Seven-Day Outlook · Classified
Highs in large type · pick a dayToday (Nov 9): thunderstorm, high 29°, low 28°, 19 mm of rain, gusts to 23 km/h. Sun up 6:12 AM, down 5:56 PM. Lightning and thunder expected — stay indoors and away from open ground.
Tuesday (Nov 10): thunderstorm, high 28°, low 28°, 20 mm of rain, gusts to 25 km/h. Sun up 6:12 AM, down 5:56 PM. Lightning and thunder expected — stay indoors and away from open ground.
Wednesday (Nov 11): thunder & hail, high 28°, low 28°, 23 mm of rain, gusts to 19 km/h. Sun up 6:12 AM, down 5:56 PM. Thunder with hail expected. Shelter the stock and the tools.
Thursday (Nov 12): thunderstorm, high 28°, low 28°, 34 mm of rain, gusts to 19 km/h. Sun up 6:13 AM, down 5:55 PM. Lightning and thunder expected — stay indoors and away from open ground.
Friday (Nov 13): thunderstorm, high 29°, low 27°, 30 mm of rain, gusts to 19 km/h. Sun up 6:13 AM, down 5:55 PM. Lightning and thunder expected — stay indoors and away from open ground.
Saturday (Nov 14): thunderstorm, high 29°, low 28°, 15 mm of rain, gusts to 15 km/h. Sun up 6:13 AM, down 5:55 PM. Lightning and thunder expected — stay indoors and away from open ground.
Sunday (Nov 15): thunderstorm, high 29°, low 28°, 6.4 mm of rain, gusts to 13 km/h. Sun up 6:14 AM, down 5:55 PM. Lightning and thunder expected — stay indoors and away from open ground.
The Week in Figures
| Day | Low · High | Rain | Gusts | Daylight | |
|---|---|---|---|---|---|
| Today | 28°29° | 19 mm | 23 km/h | 11 h 44 min | |
| Tuesday | 28°28° | 20 mm | 25 km/h | 11 h 44 min | |
| Wednesday | 28°28° | 23 mm | 19 km/h | 11 h 44 min | |
| Thursday | 28°28° | 34 mm | 19 km/h | 11 h 42 min | |
| Friday | 27°29° | 30 mm | 19 km/h | 11 h 42 min | |
| Saturday | 28°29° | 15 mm | 15 km/h | 11 h 42 min | |
| Sunday | 28°29° | 6.4 mm | 13 km/h | 11 h 41 min |
Warmest: Friday at 29°. Wettest: Thursday, 34 mm. Strongest gusts: Tuesday, 25 km/h.