Destination comparison
Koh Samui is the clearer pick — 74 vs 56 on the Atlas Ranger Score, and it leads in 10 of 12 months. Japan never pulls ahead — it trails in every month. If you're choosing on timing alone, Koh Samui is the safer bet; Japan makes sense mainly for its own strengths or its short strong window (best in May, 69).
Pick a month — the Atlas Ranger Score for each recomputes live, with the winner for that month.
In June, Koh Samui wins — 75 vs 69 on the Atlas Ranger Score.
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.
Japan Koh Samui
Japan leads 0 months · Koh Samui leads 10 months (Jan, Feb, Mar, Apr, Jun, Jul, Aug, Sep, Oct, Dec) · 2 too close to call
🇯🇵 Japan
Pick Japan if you want temples, history and festivals with big-city energy and food — it scores highest around May and peaks in May (69).
Japan full guide →🇹🇭 Koh Samui
Pick Koh Samui if you want beaches and warm water with an easy family trip — it scores highest Jan–Apr, Jun–Oct and Dec and peaks in January (88).
Koh Samui full guide →Compare live hotel prices for either, or open each guide for current flight fares.
🇹🇭 Koh Samui
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Koh Samui is the clearer pick — 74 vs 56 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.
Koh Samui averages a higher weather score (70 vs 51). Weather is the biggest input to the score, but both have strong months and weak months; the month-by-month chart shows exactly when.
Koh Samui has more shoulder- and low-season months, which is where the best value and the fewest crowds are. Travelling outside each destination's peak months is the single biggest way to cut costs.
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.
