Destination comparison
Koh Samui is the clearer pick — 74 vs 56 on the Atlas Ranger Score, and it leads 10 of 12 months. Japan never pulls ahead, with its own best stretch in May (69). On timing alone Koh Samui is the safer bet; Japan earns the trip on its own character, not its calendar.
Pick a month — the Atlas Ranger Score for each recomputes live, with the winner for that month.
In July, Koh Samui wins — 73 vs 63 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 — its strongest stretch is around May (69).
Japan full guide →🇹🇭 Koh Samui
Pick Koh Samui if you want beaches and warm water with an easy family trip — it leads in 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.
