Fredriksdalsviken is a nature preserve situated within a designated nature reserve, notable for its restored wetlands. The area has undergone bush clearing and livestock grazing to enhance its ecological health. This preserve serves as a habitat for a variety of bird species, including lapwing, redshank, curlew, and yellow wagtail, making it an important site for birdwatching and biodiversity.
Additionally, Fredriksdalsviken is home to the rare coastal violet plant and features a diverse range of vegetation and wildlife. The preserve is part of the wetland area along the lower Helgeå River, which is characterized by its varied water levels. Visitors to the area can access guidelines that inform them about their rights and responsibilities in nature, in accordance with Allemansrätten, the Swedish right of public access. The preserve also provides visitor services and amenities to enhance the experience of those exploring this natural environment.