Outdoor awning, which comprises: - a support structure provided with at least two longitudinal members parallel to each other, each of which longitudinally extended along a main extension direction between a front end thereof and an opposite rear end thereof, and is provided with a longitudinal guide parallel to said main extension direction; - at least one sheet arranged between said longitudinal members and being extended according to said main extension direction between a rear edge thereof constrained to said support structure, and a front edge thereof fixed to a front profile, which is arranged transversely to said longitudinal members and is slidably engaged at its terminals to the longitudinal guides of said longitudinal members; said front profile being movable along said longitudinal guides between a closed position and an open position, in which it is arranged at the front ends of said longitudinal members in order to spread said sheet above a surface to be covered; - at least one gutter, which is fixed to said support structure at a front side of said awning, and is arranged transverse to said longitudinal members at the front ends of the latter; said gutter being provided with a rear containment wall delimited on the upper part by a first longitudinal edge, and with a front containment wall connected on the lower part to said rear containment wall by means of a bottom wall and delimited on the upper part by a second longitudinal edge, which defines with said first longitudinal edge an inlet opening adapted to allow the entrance into said gutter of rainwater susceptible to descending from said sheet with said front profile placed in said open position; said awning being characterized in that said front profile is provided with at least one appendage, which is projectingly extended towards the front side of said awning, has the front edge of said sheet fixed, and is placed at a height greater than that of the first longitudinal edge of said gutter; said appendage being placed above the bottom wall of said gutter between said first and said second longitudinal edge (17', 18') with said front profile in said open position, in order to convey into said gutter the rainwater susceptible to descending from said sheet. - a support structure provided with at least two longitudinal members parallel to each other, each of which longitudinally extended along a main extension direction between a front end thereof and an opposite rear end thereof, and is provided with a longitudinal guide parallel to said main extension direction; - at least one sheet arranged between said longitudinal members and being extended according to said main extension direction between a rear edge thereof constrained to said support structure, and a front edge thereof fixed to a front profile, which is arranged transversely to said longitudinal members and is slidably engaged at its terminals to the longitudinal guides of said longitudinal members; said front profile being movable along said longitudinal guides between a closed position and an open position, in which it is arranged at the front ends of said longitudinal members in order to spread said sheet above a surface to be covered; - at least one gutter, which is fixed to said support structure at a front side of said awning, and is arranged transverse to said longitudinal members at the front ends of the latter; said gutter being provided with a rear containment wall delimited on the upper part by a first longitudinal edge, and with a front containment wall connected on the lower part to said rear containment wall by means of a bottom wall and delimited on the upper part by a second longitudinal edge, which defines with said first longitudinal edge an inlet opening adapted to allow the entrance into said gutter of rainwater susceptible to descending from said sheet with said front profile placed in said open position;