Measured, not vibes
Best Time to Visit Koh Phangan
By measured weather comfort, the top months for Koh Phangan are January, March, February — and RouteVerdict's editorial pick, which also weighs crowds and prices, is February, March, April, July, August, September. The table below is computed from ERA5 reanalysis data for 2020–2024, measured at Koh Pha Ngan (Koh Phangan) (430 m elevation).
Month by month
Koh Phangan weather and comfort, 2020–2024
| Month | Avg high | Wet days | Comfort | Season |
|---|---|---|---|---|
| January | 25.3°C / 78°F | 9.5 | 78 | Best |
| February | 25.7°C / 78°F | 11.5 | 74 | Best |
| March | 27°C / 81°F | 6.8 | 78 | Best |
| April | 27.8°C / 82°F | 12 | 66 | |
| May | 27.6°C / 82°F | 17 | 58 | |
| June | 27.1°C / 81°F | 17 | 60 | |
| July | 26.5°C / 80°F | 19.2 | 60 | |
| August | 26.7°C / 80°F | 17.3 | 60 | |
| September | 26°C / 79°F | 20 | 62 | |
| October | 25.6°C / 78°F | 23.3 | 62 | |
| November | 25.4°C / 78°F | 21.3 | 63 | Shoulder |
| December | 25.2°C / 77°F | 14.7 | 69 | Shoulder |
Comfort is RouteVerdict's 0–100 score: 100·exp(−(high−23)²/162) × (1 − min(0.35, wet days × 0.02)). The full method is on the methodology page. Weather data by Open-Meteo.com (ERA5, CC BY 4.0), 2020–2024 normals. Wet day = ≥1 mm precipitation.
FAQ
Koh Phangan timing questions
What is the best month to visit Koh Phangan?
By measured weather comfort (ERA5 2020–2024), the top months are January, March, and February, with January scoring highest. RouteVerdict's editorial pick is February, March, April, July, August, and September, which also weighs crowds, prices, and events.
What is the hottest month in Koh Phangan?
April, with an average daily high of 27.8°C (82°F).
What is the rainiest month in Koh Phangan?
October, averaging 23.3 days with at least 1 mm of precipitation.
When is shoulder season in Koh Phangan?
December and November — the best-scoring months outside both the measured top three and RouteVerdict's editorial peak-season pick.