Koh Samui in January

Weather in Koh Samui in January

Variable. Early January: still possible to see rain, overcast skies, and choppy seas — a continuation of the November–December wet period. Mid-to-late January: gradual improvement, more sunshine, and calmer water. Temperatures 25–30°C throughout the month.

Crowds & Prices

Low season pricing in early January. Growing toward peak as conditions improve. Accommodation is affordable and widely available outside the New Year week (if you arrive post-1 January).

Best Things to Do in January

• 1Ang Thong Marine Park day trip — best on calmer weather days, late January is more reliable
• 2Wellness and yoga retreats — Koh Samui has an excellent wellness scene
• 3Cooking classes and food tours
• 4Bophut Fisherman's Village exploration
• 5Muay thai training camps — popular in the quieter low season
• 6Spa treatments — many resorts offer extended low-season packages
• 7Inland waterfalls — Na Muang Falls accessible year-round

Travel Tips for January

• Aim for mid-to-late January arrival if sea swimming is important to you.

• Check weather forecasts carefully for early January departures.

• Low-season hotel rates persist until mid-January — good value for flexible travellers.

• If seas are rough, day trips to Ang Thong or Koh Tao may be cancelled — have a backup plan.

• Wellness retreats are particularly good value in early January when they offer post-holiday packages.