Thailand (Koh Samui) · April
Best travel monthTravel seasonThailand · Asia
Climate Overview
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ø day, range from coolest to warmest dayØ dayrange | 31° (88°)27– (81–)32 (90) | 31° (88°)29– (84–)32 (90) | 32° (90°)29– (84–)34 (93) | 33° (91°)29– (84–)35 (95) | 34° (93°)31– (88–)35 (95) | 33° (91°)30– (86–)35 (95) | 33° (91°)30– (86–)34 (93) | 33° (91°)30– (86–)34 (93) | 33° (91°)29– (84–)34 (93) | 32° (90°)28– (82–)34 (93) | 31° (88°)27– (81–)33 (91) | 31° (88°)27– (81–)33 (91) |
Ø night, range from coldest to warmest nightØ nightrange | 26° (79°)22– (72–)27 (81) | 26° (79°)23– (73–)27 (81) | 27° (81°)24– (75–)28 (82) | 27° (81°)24– (75–)29 (84) | 27° (81°)24– (75–)28 (82) | 27° (81°)24– (75–)28 (82) | 27° (81°)24– (75–)28 (82) | 27° (81°)24– (75–)28 (82) | 27° (81°)24– (75–)27 (81) | 26° (79°)24– (75–)27 (81) | 26° (79°)24– (75–)27 (81) | 26° (79°)23– (73–)27 (81) |
☀️Sunshine | 8h UV 8 | 9h UV 9 | 10h UV 9 | 9h UV 9 | 8h UV 9 | 8h UV 8 | 7h UV 8 | 8h UV 8 | 6h UV 8 | 6h UV 7 | 6h UV 7 | 7h UV 7 |
🌊Water Temp | 28° (82°) | 29° (84°) | 30° (86°) | 31° (88°) | 31° (88°) | 30° (86°) | 30° (86°) | 30° (86°) | 30° (86°) | 30° (86°) | 29° (84°) | 28° (82°) |
🌧Rain Days | 8d154mm (6.1") | 4d66mm (2.6") | 4d112mm (4.4") | 6d101mm (4.0") | 11d152mm (6.0") | 10d120mm (4.7") | 11d142mm (5.6") | 8d95mm (3.8") | 11d122mm (4.8") | 15d239mm (9.4") | 16d474mm (18.7") | 11d310mm (12.2") |
Best travel time current monthØ = average · small figures = range: coolest–warmest day / coldest–warmest nightClimate data 2005–2025 · Source: ERA5 + station data
Travel season — mid-range prices, good availability.
April is one of the best months to visit Thailand (Koh Samui) — with 9 sunshine hours per day and pleasant highs of 33°C (91°F).
Daytime highs reach 33°C (91°F) with a daily average of 30°C (86°F) — nights stay warm at 27°C (81°F). Peaks reach around 35°C (95°F), the coldest nights around 24°C (75°F). With 9 sunshine hours per day, April is one of the sunniest months — 101 mm (4.0 in) of rain over 6 days. The water is a warm 31°C (88°F) — perfect for snorkelling and swimming.
Pack light summer clothing, sunscreen, and swimwear — beach and water conditions in April are ideal.
Events & Festivals
- Songkran (Thai New Year)13–15 April
Southeast Asia's biggest water festival turns Chaweng and Lamai into one huge water party. People drench each other with water pistols and buckets — traditionally a blessing for the new year.
Packing list for Thailand (Koh Samui) in April
- Light summer clothes
- Swimwear and beach towel
- SPF 50 sunscreen
- Sunglasses
- Sun hat
- Small umbrella (occasional showers possible)
- Insect repellent
- Travel first-aid kit
Frequently Asked Questions
- Is April a good time to visit Thailand (Koh Samui)?
- Yes — April is one of the best months to visit Thailand (Koh Samui) (Climate Score: 81/100). High temperatures (33°C (91°F)), good sunshine (9 h/day), and few rain days (6) make it one of the most recommended months.
- How warm is it in Thailand (Koh Samui) in April?
- In April, Thailand (Koh Samui) sees daily highs of 33°C (91°F). Nights cool to 27°C (81°F), with a daily average of 30°C (86°F). Peaks reach around 35°C (95°F), the coldest nights around 24°C (75°F).
- How much rain falls in Thailand (Koh Samui) in April?
- In April, Thailand (Koh Samui) receives an average of 101 mm (4.0 in) of rain over 6 rain days. An umbrella may occasionally be needed.
- How many sunshine hours does Thailand (Koh Samui) get in April?
- Thailand (Koh Samui) averages 9 sunshine hours per day in April — above the annual average.
- How warm is the water in Thailand (Koh Samui) in April?
- Water temperature in Thailand (Koh Samui) in April averages 31°C (88°F) — ideal for swimming and snorkelling.
