The National Sea Rescue Institute (NSRI) has warned anglers, bathers, and sailors to be cautious around the coastline as tides could be affected by this week’s supermoon.

Today marks the second supermoon in one month – the third consecutive supermoon, and the last for the year.

The NSRI says this full moon brings the spring tide ‘where high tide is higher than normal and low tide is lower than normal’.

“Spring tide can have an increased effect on the strength of rip currents and caution is advised,” it said.

“Already you will have noticed the growing spring tide’s high tide higher than normal and the growing spring tide’s low tide lower than normal – building gradually over the past few days.

“The full effect of this super moon blue moon spring tide peaks during the full moon period over August 30 and 31, and then gradually begins to decline over the next few days into the new week.”