Weather in Samui on 20 August 2026
Preliminary outlook for 20 August 2026
A preliminary estimate based on the 2019–2025 archive: daytime around +30°C and nighttime around +27°C, average precipitation 0.7 mm, wind around 4 m/s, humidity around 73%.
This is a climate-based estimate, not a precise long-range forecast. It is replaced by hourly data when the date enters the forecast window.
+29°C
Weather archive — latest year: 2025
Clear/Sunny
Weather archive — latest year: 2025
Nighttime: +27°C
Precipitation: 0.2 mm
Wind: 1 — 2 m/s
Humidity: 68%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +29°C | Sun hours | 10 h |
| UV index | 6 | Cloud cover (avg.) | 63% |
| Pressure (avg.) | 757 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +32°C | Dew point (avg.) | +22°C |
| Heat index (avg.) | +32°C | Wind chill (avg.) | +29°C |
| Wind gusts (max.) | 2 m/s | Wind direction (avg.) | 145° ↓ (S) |
Sunrise
06:12
Duration
12 h 23 min
Sunset
18:35
Moonrise
03:13
Moonset
16:20
Moon phase
Waning Crescent
Illumination
15%
+29°C
Weather archive — for 2024 year
Patchy rain nearby
Weather archive — for 2024 year
Nighttime: +28°C
Precipitation: 0.6 mm
Wind: 3 — 4 m/s
Humidity: 76%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +29°C | Sun hours | 6 h |
| UV index | 6 | Cloud cover (avg.) | 74% |
| Pressure (avg.) | 757 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +33°C | Dew point (avg.) | +24°C |
| Heat index (avg.) | +33°C | Wind chill (avg.) | +28°C |
| Wind gusts (max.) | 8 m/s | Wind direction (avg.) | 278° ← (W) |
Sunrise
06:12
Duration
12 h 23 min
Sunset
18:35
Moonrise
19:14
Moonset
06:29
Moon phase
Full Moon
Illumination
100%
+28°C
Weather archive — for 2023 year
Patchy rain nearby
Weather archive — for 2023 year
Nighttime: +27°C
Precipitation: 0.1 mm
Wind: 6 — 6 m/s
Humidity: 77%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +29°C | Sun hours | 8 h |
| UV index | 6 | Cloud cover (avg.) | 64% |
| Pressure (avg.) | 757 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +33°C | Dew point (avg.) | +24°C |
| Heat index (avg.) | +33°C | Wind chill (avg.) | +28°C |
| Wind gusts (max.) | 13 m/s | Wind direction (avg.) | 274° ← (W) |
Sunrise
06:12
Duration
12 h 23 min
Sunset
18:35
Moonrise
08:57
Moonset
21:13
Moon phase
Waxing Crescent
Illumination
23%
+29°C
Weather archive — for 2022 year
Clear/Sunny
Weather archive — for 2022 year
Nighttime: +28°C
Precipitation: 0.3 mm
Wind: 5 — 6 m/s
Humidity: 74%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +31°C | Sun hours | 10 h |
| UV index | 6 | Cloud cover (avg.) | 59% |
| Pressure (avg.) | 755 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +34°C | Dew point (avg.) | +24°C |
| Heat index (avg.) | +34°C | Wind chill (avg.) | +29°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 278° ← (W) |
Sunrise
06:12
Duration
12 h 23 min
Sunset
18:35
Moonrise
00:14
Moonset
13:10
Moon phase
Last Quarter
Illumination
39%
+27°C
Weather archive — for 2021 year
Patchy rain nearby
Weather archive — for 2021 year
Nighttime: +25°C
Precipitation: 3 mm
Wind: 3 — 4 m/s
Humidity: 72%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +29°C | Sun hours | 7 h |
| UV index | 6 | Cloud cover (avg.) | 78% |
| Pressure (avg.) | 757 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 9 km | Sea temperature | — |
| Feels like (avg.) | +30°C | Dew point (avg.) | +23°C |
| Heat index (avg.) | +30°C | Wind chill (avg.) | +27°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 255° ← (W) |
Sunrise
06:12
Duration
12 h 23 min
Sunset
18:35
Moonrise
16:57
Moonset
03:50
Moon phase
Waxing Gibbous
Illumination
83%
+28°C
Weather archive — for 2020 year
Clear/Sunny
Weather archive — for 2020 year
Nighttime: +25°C
Precipitation: 0.4 mm
Wind: 2 — 3 m/s
Humidity: 75%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +29°C | Sun hours | 12 h |
| UV index | 6 | Cloud cover (avg.) | 45% |
| Pressure (avg.) | 756 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +31°C | Dew point (avg.) | +24°C |
| Heat index (avg.) | +31°C | Wind chill (avg.) | +28°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 189° ← (WNW) |
Sunrise
06:12
Duration
12 h 23 min
Sunset
18:35
Moonrise
07:09
Moonset
19:50
Moon phase
Waxing Crescent
Illumination
6%
+29°C
Weather archive — for 2019 year
Clear/Sunny
Weather archive — for 2019 year
Nighttime: +28°C
Precipitation: 0 mm
Wind: 5 — 5 m/s
Humidity: 70%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +31°C | Sun hours | 12 h |
| UV index | 7 | Cloud cover (avg.) | 28% |
| Pressure (avg.) | 756 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +33°C | Dew point (avg.) | +23°C |
| Heat index (avg.) | +33°C | Wind chill (avg.) | +29°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 262° ← (W) |
Sunrise
06:12
Duration
12 h 23 min
Sunset
18:35
Moonrise
21:56
Moonset
09:39
Moon phase
Waning Gibbous
Illumination
64%
Weather in Samui on 20 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+29°C
|
+27°C
|
+29°C | 10 h | 6 | 68% | 1 — 2 m/s |
| 2024 |
+29°C
|
+28°C
|
+29°C | 6 h | 6 | 76% | 3 — 4 m/s |
| 2023 |
+29°C
|
+27°C
|
+28°C | 8 h | 6 | 77% | 6 — 6 m/s |
| 2022 |
+31°C
|
+28°C
|
+29°C | 10 h | 6 | 74% | 5 — 6 m/s |
| 2021 |
+29°C
|
+25°C
|
+27°C | 7 h | 6 | 72% | 3 — 4 m/s |
| 2020 |
+29°C
|
+25°C
|
+28°C | 12 h | 6 | 75% | 2 — 3 m/s |
| 2019 |
+31°C
|
+28°C
|
+29°C | 12 h | 7 | 70% | 5 — 5 m/s |