Temperature
Hot by day, warm at night.
87°Ftypical September high
Typical range
September climate
September in Ko Samet
Thailand · Southeast Asia
Typhoon risk near peak and humid air are the main limitations.
Wet but workable
Daytime high
87°F
Lows around 78°F
Rain
Rain most days
Sun
8 h/day
Air feel
Very humid
Sea temp
84°F
Great for swimming
When to visit
Month-by-month fit
Best
Precipitation
It rains on most days. About 26 wet days, the highest monthly average.
86%wet-day frequency
AmountWet-day chance
Sunshine
Cloudier spells limit sunshine.
8 hSeptember sunshine
Heat & humidity by month
Very humid air is a major factor this month.
88%September Heat feel
Easy airWarm airHot airHumid airVery humid air
Hourly temperature pattern
In September, afternoons feel about 93° and nights feel near 86°.
WarmHotSwelteringNight hours
Clear sky
Overcast skies this month.
9%September Clear sky
Clear skyCloud
Wind pattern
Calm winds are typical in September.
5 mphSeptember Calm
Sea temperature
84°FSeptember sea temp
More detailIncludes daypart comfort
Typical September day
September late afternoons are around 84°F, easing to about 81°F in early evening.
Avg temp Typical range
Morning83°F
Feels 92°F
Rain59%
Cloud86%
Humid airVery high
Sun intensityModerate
Midday86°F
Feels 94°F
Rain65%
Cloud89%
Humid airVery high
Sun intensityStrong
Late afternoon84°F
Feels 92°F
Rain54%
Cloud92%
Humid airVery high
Sun intensityLow
Early evening81°F
Feels 90°F
Rain31%
Cloud94%
Humid airVery high
Sun intensityMinimal
Best windowData tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% | Sea°F |
|---|---|---|---|---|---|---|---|
| Jan | 88 | 72 | 0.8 | 4 | 10.7 | 71 | 82 |
| Feb | 89 | 74 | 1.0 | 5 | 10.8 | 76 | 83 |
| Mar | 89 | 77 | 2.1 | 10 | 10.8 | 79 | 84 |
| Apr | 90 | 79 | 3.6 | 14 | 10.9 | 80 | 86 |
| May | 89 | 79 | 8.0 | 23 | 9.6 | 83 | 87 |
| Jun | 88 | 79 | 7.8 | 22 | 9.4 | 83 | 86 |
| Jul | 87 | 79 | 8.0 | 25 | 8.8 | 84 | 85 |
| Aug | 88 | 78 | 7.6 | 24 | 8.9 | 83 | 84 |
| Sep | 87 | 78 | 11.6 | 26 | 8.0 | 86 | 84 |
| Oct | 88 | 77 | 9.1 | 22 | 9.1 | 84 | 85 |
| Nov | 88 | 75 | 2.2 | 9 | 10.1 | 75 | 84 |
| Dec | 87 | 73 | 0.5 | 2 | 10.4 | 68 | 83 |
Similar climates
Similar
Similar travel styleBaliIndonesiaSimilar travel stylePhuketThailandSimilar travel styleBoracayPhilippinesSimilar travel styleBridgetownBarbados
Want a side-by-side climate view? Compare Ko Samet with Bali.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Aug 26, 2026
Data & methodology