Weather in Koh Samui in December

December in Koh Samui, Thailand offers a warm tropical climate with a relatively pleasant weather mix including moderate temperatures, some rainfall, and ample sunshine. Visitors often experience generally comfortable conditions for exploring the outdoors. It is an appealing time for travellers seeking a winter escape with suitable climate for outdoor activities and vibrant local seasonal highlights.

December Climate Overview

• Average Temperature: 25°C to 30°C
• Rainfall: Approximately 100mm
• Sunshine Hours: Around 7 hours per day
• Sea Temperature: 28°C
• Humidity: 75%
• Wind Speed: Light to moderate breezes

What to Expect in December

Daytime Conditions

During December, daytime conditions in Koh Samui are characteristically warm, with temperatures often peaking at 30°C. Humidity is noticeable but not overwhelming, and the sunshine is plentiful, making sun protection a requirement for prolonged outdoor activities.

Rainfall Patterns

December marks the tail end of Koh Samui’s rainy season, with occasional rain showers that typically come in brief yet intense bursts. These are usually manageable and can refresh the landscape without major disruption to outdoor plans.

Evening Conditions

Evenings in December cool down to comfortable temperatures, often around 25°C. The cooler nights provide a respite from the heat and make it pleasant for dining outdoors or participating in evening events.

Best Activities in Koh Samui in December

• Outdoor Activities: Enjoy hiking adventures through lush landscapes, explore vibrant open-air markets, or take a scenic drive around the island.
• Seasonal Highlights: Witness the blossoming of local flora and enjoy the freshness brought by recent rains.
• Water-based or Nature-based Activities: Snorkelling and exploring coastal areas can be quite enjoyable with the warm sea temperatures.

What to Pack for December

• Lightweight clothing suitable for warm daytime and cooler evenings
• Protection from sun or rain (hat, sunscreen, umbrella, etc.)
• Footwear suitable for local terrain (e.g., walking, hiking, city streets)
• Reusable water bottle