Shore Bottom Composition: Sand/Rock Aquatic Life: Plenty To See Spring: 56-60°F/13-16°C Summer: 66-70°F/19-21°C Fall: 50-55°F/10-13°C Winter: Under 50°F/10°C Menai Strait, Wales The Menai Strait ( Welsh : Afon Menai , the "River Menai") is a narrow stretch of shallow tidal water about 25 km (16 mi) [1] long, which separates the island of