COOLOOLA Coast residents are being encouraged to photograph the king tide on Saturday to highlight the impacts of rising sea levels, as part of the Witness King Tides project.
And beach drivers and bathers are being warned to expect slightly trickier conditions in some cases.
A high of 2.2m is expected at Rainbow Beach about 8.25am, with an afternoon low of 0.3m at 2.53pm.
Head Rainbow Beach lifeguard Saul Duran said beach drivers should be aware that the tide would be coming up higher than they might expect, possibly leading to an unpleasant surprise for anyone stranded on the wrong side of Mudlo Rocks or caught in an area with limited on no beach..
"That's about as high a tide as we get here," he said of the morning 2.2m high.
"If it came with a big sea there would hardly be any beach left, but the swell hasn't been too big.
"Parents should watch toddlers as the tide comes in, but it does take six hours. Bathers need to watch for deep gutters".
Green Cross Australia chief executive Mara Bun said the photographic project would show the likely impact of rising sea levels.
To get involved visit witnesskingtides.org.