Absolutely, experiencing the beach towns of Negombo, Bentota and Hikkaduwa in Sri Lanka can be an amazing tropical holiday. Here are some travel tips for your journey:

Best Time to Visit:
Negombo, Bentota, and Hikkaduwa enjoy a tropical climate, so the perfect time to visit these areas is between November and April, when the weather is sunny and dry.

Route and Accessibility:
From Sri Lanka’s capital, Colombo, these beach towns are accessible by road. The drive to Negombo takes around 1 hour, to Bentota around 2 hours, and to Hikkaduwa around 2.5 hours. Trains also operate between Colombo and these towns, offering a scenic coastal ride.

Altitude and Acclimatization:
All three locations are at sea level, so altitude sickness and acclimatization are not concerns.

Accommodation and Booking:
There is a wide range of accommodation options, from budget hostels to high luxury resorts, in all three towns. Make sure to book in advance during peak tourist season.

Clothing and Essentials:
Light cotton clothing is ideal for Sri Lanka's tropical climate. Pack swimsuits and beachwear for the day. Sunscreen, sun hat, insect repellent, and beach essentials are recommended. Carry a light rain jacket, as sudden showers are common.

Health and Safety:
Remember to stay hydrated and protect yourself from the sun. Be cautious around the sea, as currents can be unpredictable. Always check swimming safety signs before entering the water. Drink bottled water and ensure your food is properly cooked, to avoid travelers' diarrhea.

Local Etiquette and Respect:
Sri Lankan culture merits respect for local customs. When visiting temples or other religious sites, dress modestly covering your shoulders and knees. PDA is considered inappropriate in Sri Lanka and beachwear should be worn only on the beach and not in local towns. Be respectful to wildlife and avoid touching or feeding wild animals.