Westport Historical Society will host its third annual kayak tour to Cockenoe Island from 1 to 3:30 p.m. Saturday, Aug. 18, starting from Longshore Sailing School at Longshore Park, 260 Compo Road S. The rain date is Sunday, Aug. 19.

The tour to the 28-acre island one mile off Westport will be led by David Park, board member of the Norwalk River Watershed Association and author of the guidebook "Kayaking in and around the Norwalk Islands." This year, the tour is being offered in conjunction with the society's current exhibit, "The Sound and the Saugatuck," through Sept. 1, according to a news release.

The tour group will land on the island for a stroll and hear about how the Saugatuck River watershed affects Long Island Sound's water quality and Norwalk islands' wildlife. Cockenoe Island is of particular interest because of conservation efforts and nesting colonies of egrets, herons and terns.

Westport residents and town officials opposed United Illuminating Co.'s plan to build a nuclear power plant there in 1967. After the proposal was defeated, the town bought the island as open space, the release states.

Intermediate level kayak ability is required for the tour, which costs $20, $18 for society members. Call the society at 203-222-1424 for reservations. Kayak rentals are available at an additional cost from the school; call 203-226-4646.