Climate · Asia
Ko Samui climate, year-round
Thailand · Tropical maritime (Gulf of Thailand) · Updated May 2026
Best months
Jan · Feb · Mar · Apr · May · Jun
Best for: Gulf-of-Thailand island nomads who base through the dry first half of the year and avoid the late-year monsoon.
Year at a glance
Cells coloured by typical daytime average temperature. ★ = best months for nomads.
Jan
26°C
78%
4mm
Feb
27°C
75%
2mm
Mar
27°C
76%
2mm
Apr
28°C
76%
4mm
May
28°C
76%
6mm
Jun
28°C
76%
4mm
Jul
27°C
76%
4mm
Aug
27°C
76%
4mm
Sep
27°C
78%
6mm
Oct
27°C
82%
10mm
Nov
26°C
82%
14mm
Dec
26°C
80%
9mm
Summer peak
28°C
April · 76% humidity
Winter low
26°C
January · 78% humidity
Climate type
Tropical maritime (Gulf of Thailand)
Humid summers, Humid winters
Field notes
Tropical maritime (Gulf of Thailand) — wet season is offset from the rest of Thailand because of the Gulf-of-Thailand monsoon pattern. Dry first-half of the year (December–April) is bright sunny and the postcard window. Late-year wet season (October–November) brings the heaviest rainfall and rough seas. Sea-water temperatures stay swimmable year-round.
Visa for nomads
High nomad-friendlyPathway
Digital nomad visa
Program
Destination Thailand Visa
Typical max stay
60 months
Same Thai DTV. Gulf-of-Thailand resort island with established expat-and-coworking infrastructure.
Editorial summary, not legal advice. Verify with the relevant consulate before applying — visa programs change with little notice.
Cost of living in Ko Samui: ~$1,900/mo
Mid-tier monthly across rent, food, transport, utilities, and coworking.
Cities with a similar climate
Useful while you’re in Ko Samui
- Travel insuranceLong-term, nomad-friendly cover that travels with you to Ko Samui
- Multi-currency bankingAvoid the 4% conversion fees foreign cards rack up in Thailand
- eSIM data planDay-one connectivity in Thailand without local-SIM friction
- Coworking & colivingDay passes, monthly memberships, and verified workspaces in Ko Samui
- Flight dealsCheapest routes in and out of Ko Samui
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Editorial estimates aggregated from public climatological summaries — typical monthly averages, not forecasts. Treat as order-of-magnitude. Microclimate, altitude, and recent extreme weather can swing these values significantly.