The popular splash pool has been one of Portsmouth’s top community facilities since 1935, with thousands of visitors enjoying the pool, sunbathing room and Blue Lagoon bar over the years.
Here are some of our favourite photos from The News’ archives to get you feeling nostalgic.
1. Hilsea Lido
Looks like fun! Children enjoying the splash pool in August 1973 Photo: The News
2. Hilsea Lido
There was hardly any room to move in the children's pool in June 1986 - the main pool was out of use. Photo: The News
3. Hilsea Lido
Locked out! Ricky Worsfold and Laura Barley behind the bars of the lido plash pool which was closed because of a pump breakdown in July 1995. Photo: The News
4. Hilsea Lido
Sorry! A swimmer is pushed into the water in July 1995, as the lido celebrated its 60th anniversary. Photo: The News