Ko Phi Phi weather in May

In May, Ko Phi Phi sees average daytime highs of 29°C and overnight lows near 27°C, with 255 mm of rain across 24.4 wet days and about 12.3 hours of daylight. It is the 2nd-warmest and 3rd-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 7% 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 24 min by month's end. Set against the rest of the year, May is Ko Phi Phi's 7th-clearest and 11th-windiest month. For the whole year in context, see Ko Phi Phi's year-round climate.

Daytime high
29°
2nd warmest
Overnight low
27°
12th coldest
Rainfall
255 mm
24.4 wet days
Daylight
12 h 24 min
6:11 AM – 6:32 PM
Cloud cover
81%
7th clearest
Wind
15 km/h
11th windiest
Solar energy
5.39 kWh/m²
Travel score
3.5
out of 10

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 Ko Phi Phi reaches about 29°C in the afternoon and slips back to 27°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 30°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)
12927
22927
32927
42927
52927
62927
72927
82927
92927
102927
112927
122927
132927
142927
152927
162927
172927
182927
192927
202927
212927
222927
232927
242927
252927
262927
272927
282927
292927
302927
312927

How May really feels in Ko Phi Phi

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.

Ko Phi Phi weather by month

How May compares with the rest of the year at a glance. May is the 2nd-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 26°526.711.66.1
Feb29° / 26°22411.76.3
Mar29° / 27°741011.95.5
Apr29° / 27°13618.712.24.2
May29° / 27°25524.412.33.5
Jun29° / 27°23122.112.43.7
Jul29° / 27°21922.412.43.9
Aug28° / 27°25022.612.33.9
Sep28° / 26°28924.4123.7
Oct28° / 26°30028.111.83.6
Nov28° / 26°21022.811.64.0
Dec28° / 26°9712.411.65.3

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 9% of May, with mostly cloudy or overcast conditions the remaining 84%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12278
22179
32080
42080
51981
61882
71882
81882
91783
101684
111684
121684
131684
141684
151684
161684
171684
181684
191684
201684
211585
221585
231585
241585
251486
261486
271387
281387
291387
301387
311387

Chance of precipitation in May

Any precipitation

Ko Phi Phi gets around 255 mm of rain over 24.4 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 79% and peaks near 82% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
179
279
380
481
581
682
782
882
982
1082
1182
1282
1382
1481
1581
1681
1780
1879
1979
2078
2177
2277
2376
2476
2576
2677
2777
2877
2978
3078
3178

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 94% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
1694
2595
3595
4595
5496
6496
7496
8496
9496
10595
11595
12595
13595
14595
15595
16595
17595
18595
19694
20694
21694
22793
23793
24793
25793
26793
27793
28793
29793
30793
31892

Wind in May

Winds average 15 km/h in May.

Across May, daily wind ranges from about 13 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 18 min at the start of May to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over May. Sunrise moves from 6:14 AM to 6:10 AM, and sunset from 6:30 PM to 6:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:146:30
212.36:146:30
312.36:136:30
412.36:136:30
512.36:136:30
612.36:136:31
712.36:126:31
812.36:126:31
912.36:126:31
1012.36:126:31
1112.36:116:31
1212.36:116:31
1312.36:116:31
1412.36:116:31
1512.36:116:32
1612.46:116:32
1712.46:106:32
1812.46:106:32
1912.46:106:32
2012.46:106:32
2112.46:106:33
2212.46:106:33
2312.46:106:33
2412.46:106:33
2512.46:106:33
2612.46:106:34
2712.46:106:34
2812.46:106:34
2912.46:106:34
3012.46:106:34
3112.46:106:35

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.39 kWh/m².

For context, solar energy here swings from a low near 4.61 kWh/m² to a high of 6.35 kWh/m² in March across the year — May's 5.39 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.6Bright
45.6Bright
55.6Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.4Bright
125.4Bright
135.4Bright
145.4Bright
155.4Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in May

Hazard calendar for Ko Phi Phi

In seasonPeak

In May, Ko Phi Phi sits inside its cyclone season. The full year is below, with each hazard's peak months called out.

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

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

Is May a good time to visit Ko Phi Phi?

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

3.5
Sightseeing
12th-best month of the year
4.5
Beach & pool
10th-best month of the year

May is a weaker month for outdoor sightseeing in Ko Phi Phi.

What to pack for Ko Phi Phi in May

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

In May, Ko Phi Phi sees daytime highs around 29°C and nights near 27°C. Pack light clothes and rain gear. Worth having: sun protection. About 24 days see rain.

light clothesrain gearsun protection

Sea temperature near Ko Phi Phi 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 17 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
Jul30Tropical
Aug30Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Ko Phi Phi 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 Ko Phi Phi peaks around February 21 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 22 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 21UV 13Nov 22UV 10
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar13Extreme
Apr13Extreme
May12Extreme
Jun12Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov10Extreme
Dec10Extreme

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

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodGoodModerateApr 1115 µg/m³Aug 2011 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb14Moderate
Mar15Moderate
Apr16Moderate
May13Moderate
Jun13Moderate
Jul13Moderate
Aug11Good
Sep12Moderate
Oct12Good
Nov12Good
Dec13Moderate
Location & terrain

Where is Ko Phi Phi?

Ko Phi Phi sits at 7.7°N, 98.8°E, 0 m above sea level, in Thailand. The nearest listed city is Ao Nang, 34 km away.

Topography around Ko Phi Phi

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

Within 3 km, the terrain around Ko Phi Phi has only modest variations in elevation — a maximum elevation change of 229 m around an average of 20 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 229 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,369 m.

The land around Ko Phi Phi is covered by water (73%) and trees (24%) within 3 km, water (99%) within 16 km, and water (65%) and trees (30%) within 80 km.

3 km
229 m
16 km
229 m
80 km
1,369 m
treesgrasslandartificial surfaceswatermangroves
May weather nearby: Ao Nang 34 km · Krabi 40 km · Ban Ko Sire 42 km · Ko Lanta 42 km · Ban Talat Yai 44 km · Phuket 44 km · Ban Ratsada 45 km · Ban Talat Nua 45 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 Ko Phi Phi (7.7404°, 98.772°, 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).