The Nanny Estuary is a coastal saltwater estuary in County Meath, Ireland, flowing into the Irish Sea. It is a designated Special Protected Area for birds, indicating a rich but sensitive environment. The estuary is flanked by the fine sand beach and dunes of Laytown/Bettystown to the north, which serves as a primary coastal access point for paddlers. The estuary's character is defined by its shorelines and salt marshes, which provide a compact but rewarding area for observing coastal wildlife. The presence of Ballygarth Castle along its banks offers a notable historical sight for paddlers to view from the water. As a tidal estuary, paddlers must plan around the significant tidal range and currents of the Irish Sea; timing trips to paddle with the incoming tide is crucial for exploring upstream, while an outgoing tide will assist with a return to the sea. The open mouth of the estuary exposes paddlers to wind and fetch from the Irish Sea, which can quickly create challenging conditions, especially when combined with tidal flow. The adjacent beach at Laytown/Bettystown is having fine sand and no mention of rocky outcrops or significant surf, suggesting a generally gentle gradient suitable for launching and landing, though wind-driven waves can occur. The area is subject to conservation management, including a project to investigate and manage Common cord-grass, and paddlers should minimize disturbance to birdlife. Guided stand-up paddleboard tours are offered in the area, indicating it is a recognized paddling location. Water temperatures follow typical Irish Sea patterns, being coldest in winter and mildest in late summer, necessitating appropriate immersion protection year-round.