浪湾又译作暑湾(拉丁语:"Sinus Aestuum")是月球正面风暴洋东部边缘上的一座月海区，大小约直径300公里，中心月面坐标为12°06′N 8°18′W / 12.1°N 8.3°W / 12.1; -8.3 (Sinus Aestuum)。

浪湾西部与风暴洋相连接且无明确的界限，这一侧坐落着突出的哥白尼环形山，它的后面是岛海；东南，宽阔的山区将浪湾与中央湾分隔开；东面则是高度更低的汽海；北面，亚平宁山脉构成了浪湾与雨海的分水岭。

浪湾西侧坐落着二座大型撞击坑-保存完好的厄拉多塞陨石坑及"幽灵坑"斯塔迪乌斯陨石坑；湾区反照率变化十分显着：西部覆盖着明亮的哥白尼环形山溅射物，而东部高地、南面及东南岸则是暗黑的火山喷发物。在浪湾南部(5°48′N 7°42′W / 5.8°N 7.7°W / 5.8; -7.7 (City Gruithuisen))的幽暗区中，坐落着一处被称为格罗特胡森城(City Gruithuisen)的异常凸起地貌。

Sinus Aestuum (latin for "Seething Bay") forms a northeastern extension to Mare Insularum. It has selenographic coordinates 10.9° N, 8.8° W, and it lies within a diameter of 290 km.

The Sinus Aestuum is a level, nearly featureless surface of low albedo basaltic lava that is marked by a few small impacts and some wrinkle ridges. The eastern border is formed by an area of irregular terrain that divides the bay from the Mare Vaporum to the east. To the north is the Montes Apenninus range and the prominent crater Eratosthenes. Along the western side is the flooded crater Stadius and the Mare Insularum to the southwest.