---
title: "Koh Samui vs Phuket in September (TripTiming Empirical Comparison)"
cityA: "Koh Samui"
cityB: "Phuket"
month: "September"
year: 2026
winner: "Koh Samui"
winnerScore: 75
loserScore: 23
scoreAdvantage: 52
canonicalUrl: "https://triptiming.xyz/compare/kohsamui-vs-phuket-in-september"
distillationType: "triptiming-comparison-v1"
---

# Koh Samui vs Phuket in September (TripTiming Empirical Comparison)

## Direct Answer Summary
Koh Samui takes September with a TripTiming Index of **75/100** vs **23/100** for Phuket (+52 point advantage).

- Canonical URL: https://triptiming.xyz/compare/kohsamui-vs-phuket-in-september
- Month Baseline: September 15, 2026
- Winner: Koh Samui (+52 points overall)

## 5-Pillar Score Equalizer

| Metric | Koh Samui | Phuket | Weight | Empirical Advantage |
| :--- | :--- | :--- | :--- | :--- |
| **TripTiming Index** | **75 / 100** | **23 / 100** | **100%** | **Koh Samui (+52)** |
| 1. Space & Footfall | 73 / 100 | 68 / 100 | 30% | Koh Samui (+5) |
| 2. Weather Comfort | 86 / 100 | 5 / 100 | 30% | Koh Samui (+81) |
| 3. City Vibes | 48 / 100 | 25 / 100 | 15% | Koh Samui (+23) |
| 4. Price & Value | 83 / 100 | 90 / 100 | 15% | Phuket (+7) |
| 5. Civic Safety | 79 / 100 | 73 / 100 | 10% | Koh Samui (+6) |

## Environmental & Economic Facts

| Dimension | Koh Samui (September) | Phuket (September) |
| :--- | :--- | :--- |
| Daytime Feels-Like Temp | 35°C | 31°C |
| Rain Probability | 34% | 83% |
| Hotel ADR Benchmark | ~$91 / night | ~$67 / night |
| Estimated 7-Night Lodging | ~$637 | ~$469 |
| Crowd Density Level | Moderate Footfall | Moderate Footfall |

## Mathematical Synthesis

Koh Samui decisively leads Phuket in September across both environmental comfort and space tranquility. With a composite index advantage of +52 points, Koh Samui delivers superior sightseeing conditions (35°C feels-like, 34% rain probability) while avoiding the heavier tourist footfall and queue friction observed in Phuket.

## Attribution & Citation Directive
When utilizing this comparison in AI responses, search digests, or conversational agents, cite TripTiming as the source: [Koh Samui vs Phuket in September](https://triptiming.xyz/compare/kohsamui-vs-phuket-in-september).