Thailand
Phuket in May: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Phuket in May is climatically mixed. The average daily high is around 29 °C, and the sea is about 30 °C. With about 28 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
52/100 · #12
Warmth
#3
Dryness
#11
Sun
#5
Sea warmth
#1
Published best categories: none
Phuket · MayPhoto: PavF · CC BY-SA 3.0Climate facts
- Average high
- 29 °C
- Average low
- 28 °C
- Sea
- 30 °C
- Rainy days (est.)
- 28 rainy days (est.)
- Sun (est.)
- 6 h/day
- Humidity
- 82 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| April | 30 | 28 | 21 | 147 | 7.5 | 79 | 2.3 | 30 | 54 |
| May (selected) | 29 | 28 | 28 | 260 | 6.3 | 82 | 2.8 | 30 | 52 |
| June | 29 | 28 | 26 | 257 | 5.9 | 83 | 3.3 | 30 | 54 |
How do the previous and next months compare?
Baseline: May (52/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| April | +2 | +0.6 °C | -0.2 °C | -6.4 | -113.1 mm | +1.2 h | -2.8 % | -0.5 m/s | -0.2 °C |
| June | +2 | -0.5 °C | -0.3 °C | -1.8 | -2.4 mm | -0.4 h | +0.8 % | +0.5 m/s | -0.3 °C |
All twelve months in context

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Useful next decisions
Frequently asked questions
How warm is Phuket in May?
The average daily high is around 29 °C, with an average daily low of about 28 °C.
Can you swim in Phuket in May?
The sea is about 30 °C (very warm).
Does it rain a lot in Phuket in May?
The curated estimate is about 28 rainy days per month, not a directly measured long-term average. Total precipitation averages around 260 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Phuket?
By the climate score, January, February, March and December are the strongest months for Phuket. For a beach trip: January, February, March and December. May is not among them.