Aber Falls (Welsh: Rhaeadr Fawr) is a waterfall located about two miles (3 km) south of the village of Abergwyngregyn, Gwynedd, Wales.

The waterfall is formed as the Afon Goch plunges about 120 feet (37 m) over a sill of igneous rock in the foothills of the Carneddau range.

Visitors walking along the main footpath towards the falls may spot several small Bronze Age settlements including an excavated roundhouse and smithy fenced off with an information plaque adorning it, several standing stones and cairns are also present, most of these sites can be found on the right side of the pathway.

The nearest place where food can be purchased is the cafe in the tourist information centre at Abergwyngregyn village.

It is possible to bathe in the plunge pool of the falls, although the water is cold even at the height of summer and care must be taken on the often slippery rocks.