According to forum posts, recommended activities in Negombo include visiting the Muthurajawela Marsh for a boat trip down the canal to the lagoon, where one can see a variety of wildlife such as birds and water monitor lizards. Exploring the Dutch Fort and the nearby Fisheries Harbor by tuk-tuk has also been highlighted as a fun activity.

Some travelers suggested visiting the local fish market for a cultural experience. Additionally, taking a stroll to St. Mary's Church and the Dutch Canal can offer insights into local architecture and history.

Though Negombo Beach has been described as unimpressive compared to other Sri Lankan beaches, walking along the beach, especially near Jetwing Beach for sunset drinks, remains a popular recommendation. Dining at local restaurants like CLUB Ceylon has also been recommended for those looking to enjoy local cuisine.

According to forum posts, travelers can take an expressway bus or an air-conditioned bus from Negombo to Colombo. The AC bus, which operates from the main bus station in Negombo, costs less than 100 rupees and ends its journey near Fort Railway Station in Colombo.

Some travelers mentioned that the fare from Negombo to Colombo via the express bus ranges between 250 and 350 LKR, and buses are available hourly. However, traffic can be heavy once the bus exits the highway, affecting the total travel time.

Travelers have noted that the speed of the journey depends on the time of departure. Both buses and trains have their advantages depending on the departure time and the waiting time for the next departure.