Head to head

Japan or Koh Samui?

Koh Samui, narrowly — 57 vs 56 across the year.

It's close — Japan and Koh Samui trade the lead through the year (56 vs 57 on the Atlas Ranger Score). Japan is the better pick in 6 of 12 months (May–Jul and Oct–Dec), Koh Samui in 4 (Jan–Apr). Japan peaks in April (58); Koh Samui peaks in February (73). The right answer depends entirely on when you go.

Snow-capped Mount Fuji under a clear blue sky, framed by pink cherry blossom branches
Japan
56/100
Good · best in April
Tropical beach in Koh Samui, Thailand with crashing waves and lush green jungle behind
Our pickKoh Samui
57/100
Good · best in February

Month by month

When to go

Pick a month. The line shows each place's score across the year; the figures below are that month's averages.

Japan Koh Samui
255075JanFebMarAprMayJunJulAugSepOctNovDec

In October, Japan is the better bet — 57 vs 45.

Score
57
45
High / low
22° / 14°
31° / 24°
Rain
200 mm
295 mm
Sunshine
5 h
8.9 h
Japan: Autumn leaves begin — dry, mild, photographically perfect
Koh Samui: Wet season starts — rainfall more than doubles, beach days unreliable

At a glance

Side by side

Japan Koh Samui
Timing & weather
Year-round score56/10057/100
Best monthApril (58)February (73)
Months it leadsMay–Jul and Oct–DecJan–Apr
Cheapest monthsJun–SepOct–Nov
Driest monthDecember (50mm)February (64mm)
Wettest monthSeptember (220mm)November (445mm)
Hottest monthAugust (31°C)May (33°C)
Best for
BeachesKoh Samui is the stronger beach trip—Stronger
Culture & festivalsJapan is the stronger pick for history, temples and festivalsStronger—
Mountains & hikingJapan is the stronger pick for mountains and hikingStronger—
Off-peak monthsKoh Samui has more shoulder and low-season months (9 vs 7), when rates and crowds ease—Stronger
Practical
Main airportsTokyo Haneda (HND), Tokyo Narita (NRT), Osaka Kansai (KIX)Samui International Airport (USM)
CurrencyJPY (Japanese Yen)THB (Thai Baht)
LanguageJapaneseThai
Time zoneJST (UTC+9, no DST)ICT (UTC+7)
ClimateHumid subtropical on Honshu (Köppen Cfa); colder Hokkaido, subtropical OkinawaTropical monsoon (Köppen Am)
VisaVisa-free 90-day entry for ~70 nationalities (US, UK, EU, Australia, etc.)60-day visa exemption for most Western nationalities (extended Jul 2024)
SafetyVery low risk — one of the safest countries to travel inLow risk — standard tropical precautions, scooter accidents are the main injury source
Named storms nearby nowNASA EONET, checked hourly. Not a forecast.None tracked within 1,000kmNone tracked within 1,000km

Your trip

Which should you pick?

PickJapan

Pick Japan if you want history and temples, plus city life and food — it leads in May–Jul and Oct–Dec and peaks in April (58).

Japan full guide
PickKoh Samui

Pick Koh Samui if you want beaches, plus easy family travel — it leads in Jan–Apr and peaks in February (73).

Koh Samui full guide

Plan your trip

Hotels, flights and more

Switch between the two. Hotel prices are for a week in each destination's best month.

Book Japan

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Questions

Good to know

Is Japan or Koh Samui better to visit?

It's almost a dead heat — Japan 56, Koh Samui 57 on the Atlas Ranger Score, our 0–100 measure of weather, crowds, value, and timing across the year. The lead flips month to month, so the right pick is essentially whenever you're travelling — compare any month with the tool above.

Which has better weather, Japan or Koh Samui?

Koh Samui averages a higher weather score (53 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.

When is it cheapest to visit Japan or Koh Samui?

Japan is cheapest in Jun–Sep; Koh Samui is cheapest in Oct–Nov. Those are the low and shoulder months, when hotel rates and crowds ease — usually because the weather is less reliable, so check the month-by-month scores above before you book.

Can I visit both Japan and Koh Samui 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.