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.
What the seasons are actually like
Traveling to Koh Phangan month by month
Koh Phangan's comfort score peaks in January at 78.4, with an average high of 25.3°C and 9.5 wet days, ahead of March's 78.3 and February's 73.6. October is the wettest month, at 23.3 wet days, with comfort at 62.3, still reasonable since temperatures barely vary. RouteVerdict's editorial pick spans February through April and July through September — a scattered mix that skips January despite its top measured score.
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.
Why does Koh Phangan's editorial pick skip January despite its top comfort score?
January scores 78.4, the year's highest, but RouteVerdict's editorial pick instead spans February through April and July through September.
What is Koh Phangan's wettest month?
October, averaging 23.3 wet days — more than any other month — though comfort still holds at 62.3.