Head to head

Cancun or Koh Samui?

Cancun, clearly — 66 vs 57 across the year.

Cancun is the stronger pick overall — 66 vs 57 on the Atlas Ranger Score — leading 8 of 12 months. But Koh Samui keeps a window, pulling ahead in Aug–Sep (peaking February, 73) — so if those are your dates, it's the better call. Otherwise Cancun, peaking February (80).

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.

Cancun Koh Samui

In October, Cancun is the better bet — 50 vs 45.

Score

High / low

32° / 23°

31° / 24°

Rain

242 mm

295 mm

Sunshine

10.1 h

8.9 h

Cancun: Hurricane risk lingers, prices stay low

Koh Samui: Wet season starts — rainfall more than doubles, beach days unreliable

At a glance

Side by side

Cancun Koh Samui

Timing & weather

Year-round score66/10057/100

Best monthFebruary (80)February (73)

Months it leadsJan–May and Oct–DecAug–Sep

Cheapest monthsMay and Sep–OctOct–Nov

Driest monthApril (37mm)February (64mm)

Wettest monthOctober (242mm)November (445mm)

Hottest monthJune (34°C)May (33°C)

Best for

BeachesBoth are beach destinations — compare the months above for when each is warmest and driestEvenEven

Off-peak monthsKoh Samui has more shoulder and low-season months (9 vs 7), when rates and crowds ease—Stronger

Practical

Main airportCancun International Airport (CUN)Samui International Airport (USM)

CurrencyMXN (Mexican Peso) — USD widely acceptedTHB (Thai Baht)

LanguageSpanish (English widely spoken in the Hotel Zone)Thai

Time zoneEastern EST (UTC−5)ICT (UTC+7)

ClimateTropical wet-and-dry (Köppen Aw)Tropical monsoon (Köppen Am)

VisaMost Western nationalities enter visa-free for up to 180 days; you receive an FMM tourist card (now usually issued digitally) on arrival.60-day visa exemption for most Western nationalities (extended Jul 2024)

SafetyThe Hotel Zone and main tourist areas are very safe; the usual caution applies to petty theft and scams. During June–November, heed official hurricane and storm alerts.Low 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?

PickCancun

Pick Cancun if you want year-round tropical warmth with a clear dry season — it leads in Jan–May and Oct–Dec and peaks in February (80).

Cancun full guide

PickKoh Samui

Pick Koh Samui if you want steamy tropical days and a defined wet season — it leads in Aug–Sep 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 Cancun

$$$ · Beaches and resorts

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Questions

Good to know

Is Cancun or Koh Samui better to visit?

Cancun is the clearer pick — 66 vs 57 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, Cancun or Koh Samui?

Cancun averages a higher weather score (61 vs 53). 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 Cancun or Koh Samui?

Cancun is cheapest in May and Sep–Oct; 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 Cancun 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.