Head to head

Koh Samui or Vietnam?

Vietnam, narrowly — 61 vs 57 across the year.

Vietnam edges it overall — 61 vs 57 on the Atlas Ranger Score — but the lead isn't permanent. Vietnam is the better pick in 6 of 12 months; Koh Samui takes the other 4 (Jun–Sep). Vietnam peaks in March (81); Koh Samui's best window is February (73). Time the trip to the month, not the average.

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.

Koh Samui Vietnam

In October, Vietnam is the better bet — 61 vs 45.

Score

High / low

31° / 24°

29° / 22°

Rain

295 mm

196 mm

Sunshine

8.9 h

7.7 h

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

Vietnam: Mixed — north drying out, central peak typhoon

At a glance

Side by side

Koh Samui Vietnam

Timing & weather

Year-round score57/10061/100

Best monthFebruary (73)March (81)

Months it leadsJun–SepJan, Mar–Apr and Oct–Dec

Cheapest monthsOct–NovJun–Sep

Driest monthFebruary (64mm)December (18mm)

Wettest monthNovember (445mm)September (387mm)

Hottest monthMay (33°C)June (33°C)

Best for

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

Culture & festivalsVietnam is the stronger pick for history, temples and festivals—Stronger

Mountains & hikingVietnam is the stronger pick for mountains and hiking—Stronger

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

Practical

Main airportsSamui International Airport (USM)Hanoi (Noi Bai), HCMC (Tan Son Nhat), Da Nang

CurrencyTHB (Thai Baht)VND (Vietnamese Dong)

LanguageThaiVietnamese

Time zoneICT (UTC+7)ICT (UTC+7)

ClimateTropical monsoon (Köppen Am)Tropical north / monsoon central / equatorial south (figures shown: central Vietnam, not Hanoi or HCMC)

Visa60-day visa exemption for most Western nationalities (extended Jul 2024)30-day or 90-day e-visa available for most nationalities

SafetyLow risk — standard tropical precautions, scooter accidents are the main injury sourceLow risk — standard tropical precautions, motorbike safety

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?

PickKoh Samui

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

Koh Samui full guide

PickVietnam

Pick Vietnam if you want city life and food, plus history and temples — it leads in Jan, Mar–Apr and Oct–Dec and peaks in March (81).

Vietnam 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 Koh Samui

$$ · First-time visitors, dining variety, the busiest beach

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Questions

Good to know

Is Koh Samui or Vietnam better to visit?

Vietnam edges it overall — 61 vs 57 on the Atlas Ranger Score, our 0–100 measure of weather, crowds, value, and timing across the year. The gap is modest and the lead flips by month — use the tool above to compare any specific month.

Which has better weather, Koh Samui or Vietnam?

Vietnam averages a higher weather score (54 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 Koh Samui or Vietnam?

Koh Samui is cheapest in Oct–Nov; Vietnam is cheapest in Jun–Sep. 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 Koh Samui and Vietnam 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.