Ko Samui weather

  • Save on summer & winter sun holidays in 2023/2024
  • Book holidays to popular destinations around the world
  • Pay £0 deposits & spread cost with direct debit

First ChoiceFirst Choice deal finder

Recommended for Thailand

The weather guide for Thailand (Ko Samui) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

  • Thailand deals & discounts
  • Thailand travel advice
  • Ko Samui climate averages by month
  • More destinations
  • Best time to go to Ko Samui
  • Ko Samui 5-day weather forecast

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

When is the best time to go to Ko Samui?

The best time to go to Ko Samui is February based on the following average weather conditions.

Maximum daytime temperature = 22 - 30°C [remove]
Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

"

Change criteria

Max Day Temperature (°C)

  • 29°C maximum daytime temperature in January in Ko Samui29
    Jan
  • 29°C maximum daytime temperature in February in Ko Samui29
    Feb
  • 30°C maximum daytime temperature in March in Ko Samui30
    Mar
  • 32°C maximum daytime temperature in April in Ko Samui32
    Apr
  • 32°C maximum daytime temperature in May in Ko Samui32
    May
  • 31°C maximum daytime temperature in June in Ko Samui31
    Jun
  • 31°C maximum daytime temperature in July in Ko Samui31
    Jul
  • 31°C maximum daytime temperature in August in Ko Samui31
    Aug
  • 31°C maximum daytime temperature in September in Ko Samui31
    Sep
  • 30°C maximum daytime temperature in October in Ko Samui30
    Oct
  • 29°C maximum daytime temperature in November in Ko Samui29
    Nov
  • 29°C maximum daytime temperature in December in Ko Samui29
    Dec

Hours of Sunshine (daily)

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

Best time to go for the weather

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

Tropical storm risk: Ko Samui, Thailand typhoon season

% of month affected by tropical storms
0
0
0
0
0
0
0
0
0
1.2%
2.2%
<1%
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

The Ko Samui, Thailand tropical storm risk chart above shows the typhoon season. The chart was processed from data supplied by the US Meteorological Agency (NOAA). Find out more about our data sources.

More about tropical storms

  • Book online with TUI & save up to 10% on holidays
  • FREE child places available for select holidays
  • Pay £0 deposit holidays with direct debit

TUITUI deal finder

Back to top

More about Thailand

Which is the hottest month in Ko Samui?

The hottest time of year in Ko Samui is normally April. Expect maximum daytime temperatures to reach 32°C with very high heat and humidity.

Which month has the most rain in Ko Samui?

In terms of rainfall, November is usually the wettest month in Ko Samui with 463mm on average. There are normally 19 days in November with some rain.

When is it sunniest in Ko Samui?

The sunniest time of year in Ko Samui is normally February with bright sunshine on average for 72% of daylight hours; that's 9 hours of sunshine per day.

When is the sea warmest in Ko Samui?

The sea is usually at its warmest in Ko Samui in May when the water temperature reaches 30°C.

Compare Ko Samui weather with the USA

Below the Ko Samui weather chart shows average maximum daytime temperature for Ko Samui, Thailand and the USA (Washington).

Maximum daytime temperature (°C)

Ko Samui, Thailand
USA (Washington)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

Compare more Ko Samui weather >>

Back to top

Related posts

Popular travel offers

Explore holidays in the sun for less

Back to Holiday Weather Top ^