Marina Barrage in short
Marina Barrage is a dam across the Marina Channel, the narrow mouth of Marina Bay. It holds back the sea so that the bay behind it works as a freshwater reservoir, and it has three jobs: supplying water, protecting the low-lying city centre from floods and giving people a place for recreation. On top of the structure is the Green Roof, a grassy public space that is open to everyone.
Visitors come for the open lawn, the water views and the Sustainable Singapore Gallery, which explains how the city manages its water. The area is a park within a water catchment, so a few rules apply that you will not find at an ordinary beach or lawn. They are listed below so that your visit goes smoothly. For other places on the bay, see things to do in Marina Bay.
Our take: a night tour with a sunset stop
This open-top bus tour includes a sunset view at Marina Barrage and ends with Garden Rhapsody.
Hand-picked tours, booked through Viator. Prices are indicative starting prices in US dollars (as of October 2026). Tap a tour for live availability and the current price in your currency.
Evening tours that stop at Marina Barrage
An evening bus tour with a sunset stop at the barrage, with live prices and availability.
Green Roof
An open lawn with a skyline view.
The Green Roof is open 24 hours and there is no entrance fee for an ordinary visit. It is a wide slope of grass where families come to picnic, and the elevated position makes it a good place to look across the water to the city skyline. Ordinary picnics are possible without prior arrangement, with space given on a first come basis.
Kite flying is allowed in the daytime only, not at night. Bicycles, skates and ball games are not allowed on the Green Roof or its ramps, and overnight stays and open fires are ruled out. The area is smoke-free, alcohol is not permitted and private fireworks are banned. Because the barrage is a catchment area park, these rules are strict and visitors are expected to follow them. Paid guided activities and event areas are a separate matter from the public roof, so do not assume they are free.
Sustainable Singapore Gallery
A free exhibition about water.
The gallery is open from 09:00 to 18:00 with a lunch break from 12:00 to 13:00, and it is closed on Tuesdays. Guided tours run every hour except during the lunch break, with the last one at 17:00. Booking in advance is recommended, although walk-ins are accepted depending on availability. At present the guided tour covers the indoor part only, because the outdoor section is not available.
Opening hours can change, so check the gallery hours before an evening visit rather than counting on it being open late. The Green Roof itself is not affected by this: the public roof stays open even when the gallery is closed or the guided tour is limited to indoors.
How the barrage works
Water supply, flood protection and recreation.
The barrage opened on 31 October 2008. In the months that followed, rainwater gradually replaced the seawater behind the dam, and from April 2009 the bay began to freshen naturally. On 20 November 2010 it was put into service as a freshwater reservoir. That date matters: the bay was not fresh on the day the barrage opened. The change gave the city a new source of water in the middle of the urban area.
Flood protection is the second job, and the third is recreation: which is why the roof is open to visitors. The water is a reservoir, not a swimming area. Swimming, wading and washing are prohibited in reservoirs, so do not enter the water. For the broader story of how the bay was formed, read the Marina Bay history.
Getting there
MRT and a short walk.
The simplest approach is to take the MRT to a station on the bay, such as Bayfront or Marina Bay, and continue on foot or with a short local ride. Check a map for the walking route on the day, and allow extra time in the heat. The getting there page lists the stations around the bay and explains the route from Changi Airport. Bring water and a hat for the walk.
Marina Barrage: frequently asked questions
Is Marina Barrage free?
The Green Roof has no entrance fee for an ordinary visit and the Sustainable Singapore Gallery is free.
Can I swim in the reservoir?
No. Swimming, wading and washing are not allowed.
Can I fly a kite on the Green Roof?
Yes, in the daytime. Kite flying is not allowed at night.
When is the gallery closed?
On Tuesdays, and daily from 12:00 to 13:00. Check the hours before an evening visit.
Can I bring alcohol or fireworks?
No. The area is smoke-free and alcohol and private fireworks are not permitted.