Surat Thani weather in April

In April, Surat Thani sees average daytime highs of 33°C and overnight lows near 26°C, with 114 mm of rain across 14.4 wet days and about 12.2 hours of daylight. It is the 1st-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 26% of the time in April, and the air most often feels miserable.

Daylight stretches from about 12 h 06 min at the start of April to 12 h 18 min by month's end. Set against the rest of the year, April is Surat Thani's 4th-clearest and 11th-windiest month. For the whole year in context, see Surat Thani's year-round climate.

Daytime high
33°
1st warmest
Overnight low
26°
12th coldest
Rainfall
114 mm
14.4 wet days
Daylight
12 h 12 min
6:17 AM – 6:29 PM
Cloud cover
63%
4th clearest
Wind
8 km/h
11th windiest
Solar energy
6.22 kWh/m²
Travel score
3.2
out of 10

Surat Thani is city in Surat Thani province, Thailand.

Air quality
Elevated
PM2.5 17 µg/m³ · 2019
Density
1,914/km²
people per km²
Founded
1930

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical April day in Surat Thani reaches about 33°C in the afternoon and slips back to 26°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 35°C. Set against its neighbours, April runs on par with March and on par with May.

25°28°30°33°35°151015202530
Avg high (°C)Avg low (°C)
13226
23226
33326
43326
53326
63326
73326
83326
93326
103326
113326
123326
133326
143326
153326
163326
173326
183326
193326
203326
213326
223326
233326
243326
253326
263326
273326
283326
293326
303326

How April really feels in Surat Thani

Once humidity and wind are folded in, April averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
30
30 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

The story in April is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Surat Thani weather by month

How April compares with the rest of the year at a glance. April is the 1st-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°699.511.55.3
Feb31° / 25°314.811.75.2
Mar32° / 25°929.211.94.1
Apr33° / 26°11414.412.23.2
May32° / 26°12422.112.42.6
Jun32° / 26°9518.712.53.0
Jul32° / 26°8918.512.53.2
Aug32° / 26°10819.812.33.1
Sep31° / 25°15523.712.12.9
Oct30° / 25°26827.311.83.0
Nov29° / 25°26723.511.63.5
Dec29° / 25°14915.711.54.7

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 17% of April, with mostly cloudy or overcast conditions the remaining 57%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14852
24753
34753
44654
54654
64555
74555
84555
94456
104456
114456
124456
134456
144456
154456
164555
174555
184456
194456
204456
214456
224258
234258
244060
253961
263862
273763
283664
293367
303268

Chance of precipitation in April

Any precipitation

Surat Thani gets around 114 mm of rain over 14.4 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 48% and peaks near 63% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
143
243
343
443
543
643
743
843
943
1043
1143
1243
1343
1444
1544
1645
1746
1847
1949
2050
2151
2252
2353
2455
2556
2657
2759
2860
2962
3063

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

Most of April feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, April lands in the miserable band about 77% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
13565
23466
33466
43367
53367
63268
73268
83169
93169
103070
113070
122971
132872
142773
152674
162575
172377
182278
192080
201882
211783
221585
231486
241387
251288
261189
271090
28991
29991
30892

Wind in April

Winds average 8 km/h in April.

Across April, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 06 min at the start of April to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over April. Sunrise moves from 6:25 AM to 6:11 AM, and sunset from 6:30 PM to 6:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:256:30
212.16:246:30
312.16:246:29
412.16:236:29
512.16:236:29
612.16:226:29
712.16:226:29
812.16:216:29
912.16:216:29
1012.26:206:29
1112.26:196:29
1212.26:196:29
1312.26:186:29
1412.26:186:29
1512.26:176:29
1612.26:176:29
1712.26:166:29
1812.26:166:29
1912.26:156:29
2012.26:156:29
2112.26:146:29
2212.26:146:29
2312.36:146:29
2412.36:136:29
2512.36:136:29
2612.36:126:29
2712.36:126:29
2812.36:116:29
2912.36:116:29
3012.36:116:29

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 6.22 kWh/m².

For context, solar energy here swings from a low near 4.14 kWh/m² to a high of 6.26 kWh/m² in March across the year — April's 6.22 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.2Intense
56.2Intense
66.3Intense
76.3Intense
86.3Intense
96.3Intense
106.3Intense
116.3Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.3Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.1Intense
256.1Intense
266.1Intense
276.0Intense
286.0Bright
296.0Bright
305.9Bright
Planning a trip in April

Hazard calendar for Surat Thani

In seasonPeak

In April, Surat Thani sits inside its cyclone season. The full year is below, with each hazard's peak months called out.

Surat Thani sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.

Surat Thani's rainy season runs May–May, when most of the year's rain falls.

Cyclone
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is April a good time to visit Surat Thani?

Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.2
Sightseeing
6th-best month of the year
5.5
Beach & pool
5th-best month of the year

April is a weaker month for outdoor sightseeing in Surat Thani.

What to pack for Surat Thani in April

From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In April, Surat Thani sees daytime highs around 33°C and nights near 26°C. Pack light clothes, rain gear and sun protection. About 14 days see rain.

light clothesrain gearsun protection

Sea temperature near Surat Thani in April

The nearest coast averages about 30°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 27 km away) is warmest in May at about 31°C and coldest in January near 28°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb28Tropical
Mar29Tropical
Apr30Tropical
May31Tropical
Jun30Tropical
Jul30Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Surat Thani in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Surat Thani peaks around August 21 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 10 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highAug 21UV 13Dec 16UV 10
UV index (midday)Level
Jan10Extreme
Feb12Extreme
Mar13Extreme
Apr13Extreme
May12Extreme
Jun12Extreme
Jul11Extreme
Aug14Extreme
Sep13Extreme
Oct12Extreme
Nov10Extreme
Dec10Very high

Air quality in Surat Thani in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.

Air quality in Surat Thani is worst in April — around 21 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Seasonal pattern from CAMS reanalysis, scaled to Surat Thani's WHO annual average of 17 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1021 µg/m³Aug 2014 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb19Moderate
Mar21Moderate
Apr21Moderate
May17Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep15Moderate
Oct15Moderate
Nov15Moderate
Dec15Moderate
Location & terrain

Where is Surat Thani?

Surat Thani sits at 9.1°N, 99.3°E, 10 m above sea level, in Thailand. The nearest listed city is Tha Kham, 12 km away.

Lang SuanKo Pha-nganNakhon Si ThammaratThung SongKo Tao

Topography around Surat Thani

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Surat Thani.

Within 3 km, the terrain around Surat Thani has only modest variations in elevation — a maximum elevation change of 35 m around an average of 6 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 308 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,599 m.

The land around Surat Thani is covered by artificial surfaces (45%) and trees (35%) within 3 km, trees (57%) and water (23%) within 16 km, and trees (68%) and water (29%) within 80 km.

3 km
35 m
16 km
308 m
80 km
1,599 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
April weather nearby: Tha Kham 12 km · Ban Na San 38 km · Ko Samui 79 km · Lang Suan 94 km · Ko Pha-ngan 103 km · Nakhon Si Thammarat 105 km · Thung Song 115 km · Ko Tao 119 km

Thailand travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B / C
230 V · 50 Hz
Prices
≈ 31% of US
price level, 2025
GDP per capita
$8,057
2025
Happiness
6.3 / 10
World Happiness, 2025
Homicide rate
4.8
per 100k, 2011
Road deaths
32.2
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Very low
EF EPI 402
Religion
Buddhist 93%Muslim 5%Christian 1%other 1%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Surat Thani (9.1401°, 99.3331°, elevation 10 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).