Weymouth Marina sits in the inner harbour of Weymouth, on the River Wey in Dorset, behind the breakwaters of Portland Harbour. A modern, purpose-built facility, it offers over 280 permanent and visiting berths dredged to 2.

5 metres below chart datum, meaning there are no tidal access restrictions. Access from the sea is via the North Ship Channel, where tidal currents can run between 6 and 12 knots in challenging conditions.

The marina lies beyond Weymouth's historic lifting town bridge, which opens on a scheduled basis during summer months. Visiting vessels are advised to contact Weymouth Harbour Radio on VHF channel 16 before entry.

Its central location on the south coast makes it a practical base for passages east toward Poole and the Solent, or west along the Jurassic Coast, and it sits close to the shortest cross-Channel crossing west of Folkestone.