Plymouth's Tinside pool, which was due to open this morning, is to remain shut due to today's stormy weather, say Plymouth City Council.
The pool on the waterfront has been significantly flooded by seawater, which breached the walls of the lido, into the pool itself.
A council spokesperson said: "The pool will have to be drained entirely, cleaned out and then refilled before the public will be able to use it."
Tinside was due to reopen today after tests confirmed waters to be safe.
Last weekend Plymouth City Council’s deputy leader, Councillor Peter Smith, took the decision to postpone the summer opening of the popular attractions after concerns that algae in the sea would pose a threat to people’s health.
Cllr Peter Smith, Cabinet Member for Leisure and Culture today said: “The pool was totally submerged in seawater. The pool has been known to flood in stormy weather in the winter, but it is quite unusual to have this happen in the summer."
While marine scientists in Plymouth moved to allay fears stating that the plankton is “harmless” and “not toxic”, Cllr Smith closed the seafront lido – which is filled with water from the Sound – after receiving conflicting advice from the Environment Agency and the Health Protection Agency.
But yesterday PCC confirmed water tests showed the algae was ‘no longer considered a health risk’.
“The opening of the pools was delayed over the Bank Holiday weekend due to uncertainties over possible health risks associated with the algal bloom in the Sound,” said a spokesperson for Plymouth City Council.
Plymouth City Council, the Environment Agency and the Health Protection Agency issued advice about the possible health effects of the bloom last Friday.
PCC added: “The rain and wind has led to the algal bloom within the Sound dispersing naturally. Analysis of samples today confirm that there is now ‘no evidence of a harmful bloom’ or any risk to human health.”
Mount Wise Pool has not been affected.