yearsofweather

Phuket in May:
seriously hot, rain on every second day

Phuket, Thailand · Records from 2006 to 2025. Not a forecast.

Mean high33°Hottest day 36.1° (2023)
Mean low26°Coldest night 24.7° (2008)
Rain days16 days7-23 by year
Rainfall245mmDaylight 12.4 → 12.6 h
Phuket's 12 months iBest: December to February
Trip types Beach Poorfrequent rainSightseeing on foot Poorhot, frequent rain and muggy
Humidity82%31 muggy days
Clear days0 days24 overcast days
Mean wind14 km/hRarely windy
Sea temperature30.7°30.1-31.6° by year (last 6)
Sunrise / sunset (15th)06:08 / 18:37Daylight 12.4 → 12.6 h

Phuket in May

The rainy season begins. As the southwest monsoon arrives, the west-coast waves get stronger and red-flag days become more frequent. Wet days and bright sunny days mix, so the weather is uneven.

It was a hot month: 33°C by day and 26°C after dark. Rain came so often (16 days on average) that dry stretches were short and worth using. Averages hide a lot here: one year saw 7, another 23.

31 days past 30°C made it a month for early starts and a long lunch indoors. Rain days averaged 15 mm each, so when it rained it rained properly.

Typhoons i No tropical storm passed within 300 km in this month over the last 20 years. Typhoons: January and November

Date by date i

‹ April May 2027 June ›
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
May 1rain on 45% of days33° 26°
2-8rain on 51% of days33° 26°
9-15rain on 54% of days33° 26°
16-22rain on 52% of days33° 26°
23-29rain on 51% of days33° 26°
30-31rain on 55% of days33° 26°

0-5/206-8/209-11/2012-20/20

May 1rain on 45% of days33° 26°
2-8rain on 51% of days33° 26°
9-15rain on 54% of days33° 26°
16-22rain on 52% of days33° 26°
23-29rain on 51% of days33° 26°
30-31rain on 55% of days33° 26°
Tap another date to change

2006none
200731mm
200840mm
200913mm
2010none
20116mm
20122mm
20134mm
2014none
201518mm
2016none
20173mm
2018none
201921mm
20203mm
2021none
202215mm
202316mm
20243mm
20259mm
Holidays in May (2027)
  • May 1 to May 4 Labour Day and Coronation Day break
  • May 3 Substitute for National Labour Day (1 May)
  • May 20 Visakha Bucha Day
  • May 31 Memorial Day

1 Local public holiday or break (busier, pricier)1 US holidays (flights fill up)

Your trip dates, the past 20 years

Trip dates ~

You can also click two dates on the axis. Hover a cell to see that day's rain.
Trip rain days Month rain days
2006
5 d 20 d
2007
5 d 18 d
2008
6 d 19 d
2009
7 d 20 d
2010
0 d 8 d
2011
7 d 14 d
2012
7 d 19 d
2013
5 d 20 d
2014
1 d 13 d
2015
1 d 11 d
2016
1 d 17 d
2017
2 d 23 d
2018
1 d 7 d
2019
5 d 20 d
2020
3 d 16 d
2021
1 d 14 d
2022
7 d 20 d
2023
2 d 12 d
2024
1 d 15 d
2025
5 d 17 d
Years with rain
Tap a date to start, tap another to end. Each cell is that date in one year.
'06'07'08'09'10'11'12'13'14'15'16'17'18'19'20'21'22'23'24'25
of 20
9
8
9
10
10
11
13
11
14
10
10
12
10
9
11
12
13
11
5
10
10
12
11
10
8
10
9
11
12
12
10
Rain days on trip
55670775111215317215

No rain1-9 mm10 mm or more Dates outside your trip are dimmed.

One row per year, one cell per day. 2018 had 7 rain days, 2017 had 23.

Phuket through the year

MonthHighLowRain daysRainfallSea
JanuaryGood 33°25°5 days68mm 29°
FebruaryGood 34°26°3 days38mm 29°
March 35°26°6 days78mm 30°
April 34°26°10 days154mm 31°
May 33°26°16 days245mm 31°
June 33°26°15 days255mm 30°
July 32°26°16 days248mm 30°
August 32°26°16 days274mm 30°
September 32°25°17 days366mm 30°
October 32°25°19 days340mm 29°
November 32°25°14 days198mm 29°
DecemberGood 32°25°8 days89mm 29°

Common questions

Does it rain a lot in Phuket in May?

Over the past 20 years May averaged 16 rain days (1 mm or more) out of 31. Individual years ran from 7 in the driest to 23 in the wettest.

What should I wear in Phuket in May?

Days averaged 33°C and nights 26°C. Pack an umbrella, sandals that can get wet, T-shirts, sunscreen plus a hat, a swimsuit, and insect repellent.

Can you swim in Phuket in May?

Sea surface temperature averaged 30.7°C in May, warm enough to stay in for a long swim. Year to year it ranged 30.1-31.6°C. Check local flags for waves and jellyfish on the day.

Is May a good time to visit Phuket?

On warmth and rain days alone, Phuket's easiest months were December to February. May ranked 12 of 12.

Is Phuket humid in May?

Mean relative humidity was 82%, with about 31 muggy days (dew point of 20°C or more) in the month.