Pärnu Beach, located in South-West Estonia, experiences a temperate climate with warm summers and cold winters. In the summer months of June, July, and August, temperatures typically range from 15 to 30 degrees Celsius. Water in Parnu Bay warms up to 23 degrees due to its shallowness and is usually a lot warmer than the other spots in Estonia. So a thin wetsuit like a 3/2 or a shorty will keep you comfortable during the summer and a thicker one in spring/autumn.