The park, currently undergoing a £3.64 million Heritage Lottery Fund-supported re-generation project, is home to a section of the River Teviot and Wilton Burn.
Adults and children are invited to attend from 2-4pm and enjoy an electro-fishing demonstration in the Wilton Burn hosted by the Tweed Foundation.
Gordon Webber, park regeneration project events manager said: “Electro-fishing is a fascinating scientific survey method used to sample fish populations to determine abundance, density, and species composition.
“The Tweed Foundation will use this technique to give visitors an amazing opportunity to discover what is in the water this year.”
In addition to the Electro-fishing demonstration, visitors will also have the opportunity to explore Hawick Museum also located in Wilton Lodge Park.
Ewan Jackson, chief executive of Live Borders said: “Hawick Museum is just one of the many cultural facilities that are now in our care.
“It is home to beautiful and fascinating artifacts and artworks linked to the town and also features nature displays and insights into domestic life in bygone eras.
“Combining a visit to the Museum with a chance to explore the park and enjoy the electro-fishing demonstration could make for a highly enjoyable afternoon out.”
The electro-fishing demonstration and entry into Hawick Museum are both free of charge. More details on the museum can be found at www.liveborders.org.uk.