Horseshoe Beach has been closed to swimmers due to an increased presence of jellyfish.

The tourist hotspot was closed at 2pm after onshore wind conditions caused an increased presence of Portuguese Man-of-War.

“Lifeguards have hoisted two red flags at the tower indicating that conditions are too dangerous for swimming,” the Ministry of the Environment, Department of Parks said in a release.

Signs have also been placed along the beach to inform of the closure.

“We wish to advise the swimming public to take extreme care while in or near the ocean over the next few days,” the ministry said.

The jellyfish have a “bluish, gas-filled float” on top and long tentacles often hidden under the surface.

Members of the public are advised to avoid them even if spotted on land, as their tentacles can still be venomous.