The bar, which sits adjacent to the Tower hotel and Tower Bridge, will be open Monday to Sunday from 12-8pm, weather permitting.
This year the Lawn has partnered with Chapel Down Winery to bring guests a selection of its drinks, including Curious Brew beers and ciders, as well as cocktails Union Punch and Curious English Garden.
Themed around the Great British Summer, the outdoor pop-up bar will feature deck chairs, bunting and traditional garden games. It will serve freshly prepared street food including fish and chips and pulled pork wraps.
Billy Hughes, general manager of the Tower hotel, London, said: "We simply had to bring the Lawn back this year after the brilliant feedback we received last year. This year we're going further to build a fantastic summer experience through our partnership with Chapel Down Winery and our entertainment and high-quality street food,"
The Lawn can be privately booked for parties or corporate events.
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