Khao Lak weather in May

In May, Khao Lak sees average daytime highs of 29°C and overnight lows near 26°C, with 302 mm of rain across 26.8 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 4% of the time in May, and the air most often feels miserable.

Daylight stretches from about 12 h 18 min at the start of May to 12 h 30 min by month's end. Set against the rest of the year, May is Khao Lak's 7th-clearest and 5th-windiest month. For the whole year in context, see Khao Lak's year-round climate.

Daytime high
29°
4th warmest
Overnight low
26°
12th coldest
Rainfall
302 mm
26.8 wet days
Daylight
12 h 24 min
6:12 AM – 6:35 PM
Cloud cover
85%
7th clearest
Wind
11 km/h
5th windiest
Solar energy
5.07 kWh/m²
Travel score
3.2
out of 10

Khao Lak is human settlement in Phang Nga Province, Thailand.

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical May day in Khao Lak reaches about 29°C in the afternoon and slips back to 26°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, May runs on par with April and on par with June.

25°28°30°33°35°151015202531
Avg high (°C)Avg low (°C)
13026
23026
33026
43026
53026
62926
72926
82926
92926
102926
112926
122926
132926
142926
152926
162926
172926
182926
192926
202926
212926
222926
232926
242926
252926
262926
272926
282926
292926
302926
312926

How May really feels in Khao Lak

Once humidity and wind are folded in, May averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Khao Lak weather by month

How May compares with the rest of the year at a glance. May is the 4th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 24°679.911.65.3
Feb30° / 25°427.711.75.2
Mar30° / 25°11615.311.94.4
Apr30° / 26°16821.812.23.6
May29° / 26°30226.812.43.2
Jun29° / 26°30124.812.53.4
Jul28° / 26°28825.412.53.5
Aug28° / 25°32225.712.33.6
Sep28° / 25°36326.312.13.6
Oct28° / 25°35528.811.83.3
Nov29° / 25°20823.111.63.7
Dec29° / 25°9013.111.55.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 7% of May, with mostly cloudy or overcast conditions the remaining 89%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11882
21783
31684
41684
51486
61486
71387
81288
91288
101288
111189
12991
13991
14991
15991
16991
17991
18892
19991
20991
21991
221090
231090
241090
25991
26991
27991
28991
29991
30892
31892

Chance of precipitation in May

Any precipitation

Khao Lak gets around 302 mm of rain over 26.8 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 87% and peaks near 89% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
186
286
387
487
588
688
789
889
989
1089
1189
1289
1389
1489
1589
1688
1788
1887
1987
2086
2185
2285
2385
2485
2585
2685
2785
2885
2985
3085
3185

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the miserable band about 88% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
11585
21585
31486
41387
51387
61288
71288
81189
91189
101189
111189
121090
131090
141090
151090
16991
171090
181090
191090
201189
211189
221288
231288
241288
251288
261387
271387
281387
291486
301486
311486

Wind in May

Winds average 11 km/h in May.

Across May, daily wind ranges from about 9 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
410calm
510calm
610calm
710calm
810calm
910calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 18 min at the start of May to 12 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over May. Sunrise moves from 6:15 AM to 6:11 AM, and sunset from 6:33 PM to 6:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:156:33
212.36:156:33
312.36:156:33
412.36:146:33
512.36:146:34
612.36:146:34
712.36:136:34
812.36:136:34
912.46:136:34
1012.46:136:34
1112.46:126:34
1212.46:126:34
1312.46:126:35
1412.46:126:35
1512.46:126:35
1612.46:126:35
1712.46:116:35
1812.46:116:35
1912.46:116:36
2012.46:116:36
2112.46:116:36
2212.46:116:36
2312.46:116:36
2412.46:116:37
2512.46:116:37
2612.46:116:37
2712.46:116:37
2812.46:116:38
2912.56:116:38
3012.56:116:38
3112.56:116:38

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.07 kWh/m².

For context, solar energy here swings from a low near 4.35 kWh/m² to a high of 6.1 kWh/m² in March across the year — May's 5.07 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.4Bright
35.4Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.2Bright
95.2Bright
105.2Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in May

Hazard calendar for Khao Lak

In seasonPeak

In May, Khao Lak sits inside its cyclone and rainy season season. The full year is below, with each hazard's peak months called out.

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

Khao Lak's rainy season runs April–November, when most of the year's rain falls.

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

Is May a good time to visit Khao Lak?

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

3.2
Sightseeing
12th-best month of the year
4.1
Beach & pool
10th-best month of the year

May is a weaker month for outdoor sightseeing in Khao Lak.

What to pack for Khao Lak in May

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

In May, Khao Lak sees daytime highs around 29°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

Sea temperature near Khao Lak in May

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

The sea at the nearest coast (about 13 km away) is warmest in April at about 30°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
Jan28Tropical
Feb29Tropical
Mar29Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Khao Lak in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Khao Lak peaks around August 21 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeAug 21UV 13Dec 12UV 10
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar13Extreme
Apr13Extreme
May12Extreme
Jun12Extreme
Jul11Extreme
Aug14Extreme
Sep13Extreme
Oct12Extreme
Nov10Extreme
Dec10Very high

Air quality in Khao Lak in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Khao Lak is worst in March — around 16 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 2216 µg/m³Nov 1211 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb14Moderate
Mar16Moderate
Apr16Moderate
May12Moderate
Jun13Moderate
Jul13Moderate
Aug11Good
Sep12Good
Oct11Good
Nov11Good
Dec12Good
Location & terrain

Where is Khao Lak?

Khao Lak sits at 8.6°N, 98.2°E, 0 m above sea level, in Thailand. The nearest listed city is Ban Kamala, 74 km away.

Topography around Khao Lak

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

Within 3 km, the terrain around Khao Lak has significant variations in elevation — a maximum elevation change of 388 m around an average of 45 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 686 m; within 80 km, large variations in elevation — a maximum elevation change of 1,077 m.

The land around Khao Lak is covered by water (50%) and trees (45%) within 3 km, water (49%) and trees (46%) within 16 km, and water (59%) and trees (37%) within 80 km.

3 km
388 m
16 km
686 m
80 km
1,077 m
treesgrasslandartificial surfaceswatermangroves
May weather nearby: Ban Kamala 74 km · Kathu 78 km · Ban Ratsada 80 km · Wichit 82 km · Phuket 82 km · Ban Talat Nua 83 km · Ban Talat Yai 83 km · Ban Ko Sire 83 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 Khao Lak (8.615°, 98.2399°, elevation 0 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).