Koh Samui is the clearer pick — 74 vs 59 on the Atlas Ranger Score, and it leads in 10 of 12 months. Okinawa only pulls ahead in Nov. If you're choosing on timing alone, Koh Samui is the safer bet; Okinawa makes sense mainly for its own strengths or its short strong window (best in November, 72).
Pick a month — the Atlas Ranger Score for each recomputes live, with the winner for that month.
🇹🇭 Koh SamuiBetter in Jun
75
🇯🇵 Okinawa
43
In June, Koh Samui wins — 75 vs 43 on the Atlas Ranger Score.
The whole year at a glance
Each line is a destination's Atlas Ranger Score across all twelve months — higher is a better time to visit. Where the lines cross is where the better choice flips.
Koh Samui Okinawa
Koh Samui leads 10 months (Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Dec) · Okinawa leads 1 month (Nov) · 1 too close to call
Who wins for what
Best weather year-round🇹🇭 Koh SamuiKoh Samui averages a higher weather score (70 vs 54)
Beaches🇹🇭 Koh SamuiKoh Samui has the more reliable beach weather
Nightlife🇹🇭 Koh SamuiKoh Samui is the clear pick
Value & fewer crowdsTieSimilar off-peak windows
Which should you pick?
🇹🇭 Koh Samui
Pick Koh Samui if you want beaches and warm water with an easy family trip — it scores highest Jan–Sep and Dec and peaks in January (88).
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Side by side
🇹🇭 Koh Samui🇯🇵 Okinawa
CurrencyTHB (Thai Baht)JPY (Japanese Yen)
Climate zoneTropical monsoon (Köppen Am)Subtropical (Köppen Cfa) — closer to Taiwan than to Tokyo
Nearest airportUSMOKA
SafetyLow risk — standard tropical precautions, scooter accidents are the main injury sourceVery low risk — same as mainland Japan
Frequently asked questions
Is Koh Samui or Okinawa better to visit?
Koh Samui is the clearer pick — 74 vs 59 on the Atlas Ranger Score, our 0–100 measure of weather, crowds, value, and timing across the year. It leads most of the year, though the month-by-month chart still shows the other's stronger windows.
Which has better weather, Koh Samui or Okinawa?
Koh Samui averages a higher weather score (70 vs 54). Weather is the biggest input to the score, but both have strong months and weak months; the month-by-month chart shows exactly when.
Which is cheaper, Koh Samui or Okinawa?
Both have similar off-peak windows. The cheapest time for either is its shoulder/low season — outside the peak-weather months when prices spike.
Can I visit both Koh Samui and Okinawa in one trip?
Often yes — many travellers pair them. The smart move is to time each leg to its own best months. Check each destination's full guide (linked below) for the month-by-month detail, then sequence your trip so each stop lands in its strong window.
Scores come from the Atlas Ranger Score — our transparent 0–100 measure of how good a destination is to visit each month.