Weather in Phuket in July

How July compares

July is the 7th warmest month of the year in Phuket and ranks 68th of 134 destinations we compare for July - see where else is hot in July. Within Thailand it is 6th of 6 (Thailand in July). Against London's average high of 21.8°C in July, Phuket is 6.7°C warmer by day and 12.7°C warmer at night.

Daytime and night-time in July

The typical July day in Phuket peaks at 28.5°C, but that is an average: the warmest 10% of days reach 29.4°C or more. About 100% of days top 25°C and 1 in 19 pass 30°C. Nights average 26.2°C; one night in ten drops to 25.1°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest July day here reached 31.8°C (2019-07-06) and the coldest night 23.5°C (2018-07-01).

Rain in July

Wet (more than 8 rainy days): about 24 days with 1 mm or more, 242 mm in total. Year to year it varies a lot - the wettest July was 1993 with 381 mm, the driest 2019 with 94 mm. Humidity averages 81%, which makes the heat feel heavier than the thermometer suggests.

Sea temperature in July

The sea averages 29.5°C - warm enough to swim (22°c+). Depending on the year it ranges from 29.0°C to 29.8°C. For the warmest sea here, come in April (30.2°C).

Sunshine and daylight

Around 1.8 hours of sunshine a day (estimated from cloud cover), 12.4 hours of daylight: the sun rises about 06:16 and sets about 18:49 local time in mid-July. Average cloud cover is 86%.

Is July a good time to visit Phuket?

It is a reasonable choice: hot days but expect showers. The best months for Phuket on our scoring are February, January, March; months averaging 25°C or more: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec.

Hot days, warm nights and little relief from humidity

Average highs of 28.5°C sound fairly manageable, but humidity of 81% makes this a different prospect from a warm British day. Choose loose, light clothing and avoid making midday your busiest outdoor period. Nights average 26.2°C, so do not expect evenings to provide much cooling; prioritise comfortable cooling where you stay. Days reaching 30°C are uncommon, but that does not make July feel cool. The sea is warm enough for swimming at 29.5°C, which suits travellers who dislike a chilly entry. Water temperature alone does not establish safe swimming conditions, though, so check local advice before going in.

Plan around wet weather, not dependable sunshine

Rain is the main reason to hesitate over July. With about 24 rainy days and just 1.8 hours of sunshine out of 12.4 hours of daylight, this is not a strong choice if clear skies are central to your holiday. There is still daylight for outdoor plans, but daylight and sunshine are not the same thing. Keep your schedule flexible, carry lightweight rain protection and have something you would enjoy doing indoors. The figures do not tell you when rain will arrive or how long each spell will last, so do not build your plans around an assumed dry morning or brief afternoon shower.