Weather in Sri Lanka in May

In May, Sri Lanka experiences a tropical climate characterised by warm temperatures, increased rainfall, and elevated humidity. Travellers can expect a mix of sunny and rainy days, with the weather generally being warm and moist. While outdoor exploration is possible, conditions can vary, and it’s advisable to be prepared for rain. May marks a period where certain regions see enhanced natural activities and seasonal changes.

May Climate Overview

• Average Temperature: 27°C to 33°C
• Rainfall: Approximately 200mm
• Sunshine Hours: Around 6 hours per day
• Humidity: 75% to 85%
• Wind Speed: Moderate, 10-20 km/h

What to Expect in May

Daytime Conditions

During the day, temperatures in Sri Lanka typically rise to the high 20s to low 30s in degrees Celsius. The sun can be strong, and the moisture in the air enhances the heat, making it feel warmer. Sun exposure requires precautions such as hats and sunscreen, yet cloud cover can offer temporary relief.

Rainfall Patterns

Rainfall in May can be intermittent, with short but heavy showers, particularly due to the south-west monsoon. These rains are most common in the afternoons or evenings. Rainfall might disrupt outdoor plans, so carrying an umbrella or raincoat is advisable.

Evening Conditions

The evenings bring a slight cooling effect, with temperatures dropping to comfortable ranges conducive for outdoor dining or leisurely strolls. Breezes might occur, providing a welcome respite from the day’s warmth, but the humidity may remain noticeable.

Best Activities in Sri Lanka in May

• Outdoor Activities: Hiking in the central highlands or exploring the lush rainforests can be rewarding. Visiting vibrant local markets is also a great choice.
• Seasonal Highlights: May is a suitable time for observing the thriving flora as the rains encourage lush greenery.
• Water-based or Nature-based Activities: River safaris and nature treks are recommended during drier parts of the day.

What to Pack for May

• Light, breathable clothing suitable for warm daytime and cooler evenings
• Sun protection such as hats and sunscreen, along with a raincoat or umbrella for rain
• Comfortable footwear for varied terrains—trainers or hiking boots for outdoor adventures
• Reusable water bottle to stay hydrated