New maps show the places in North Wales most at risk of falling into the sea. And among those locations thought to be most in danger are in Anglesey and Colwyn Bay, with Traeth Porthor (Whistling Sands) on the Llŷn Peninsula, thought to be potentially one of the most at risk in Wales. Across Wales, the latest estimates suggest that almost 400 properties are at risk from coastal erosion. Without intervention, these homes could one day be consumed by waves or simply topple into sea. Combined with the much larger risk of tidal flooding, it's an existential problem for some communities as parts of the Welsh coastline shrinks and recedes, reports Wales Online. In total, around 60% of the Welsh population live in coastal areas. A Welsh Government risk management strategy for flooding and coastal erosion published in 2020 stated that over 245,000 properties in Wales are at risk of flooding from rivers, the sea and surface water with almost 400 properties also at risk from coastal erosion. It added: "As the climate changes we can expect those risks to increase, with more frequent and severe floods, rising sea levels and faster rates of erosion of the coast." As time passes therefore, more and more communities will be affected by coastal erosion as well as flooding, including some that are not currently considered to be at risk. Natural Resources Wales are investing in shoreline management policies for some areas. In reality, without mitigations, few places would escape a loss of land and the resulting coastal squeeze. Potentially one of the worst affected in Wales, according to the NRW data, is Traeth Porthor (Whistling Sands) on the Llŷn Peninsula, in North Wales. Here, coastal experts have a high confidence that, in 80 years times (by 2105), the sea will have taken a 260-metre bite from the land (based on a 2005 baseline). A less confident prediction is that the loss could amount to as much 370 metres. If the latter materialises, the beach's National Trust car park will disappear and the sea will sweep up to the road to Aberdaron. This process is underway already: by 2055, Porthor's erosion could total 130 metres (high confidence) or 170 metres (low confidence). Perhaps the beach - renowned for its "squeaky" sand - will be reshaped, perhaps it will disappear completely. Another place at risk is Barry. NRW's map shows that coastal specialists expect that by 2105, the sea will have taken 140 metres of the land. The less confident estimate is that 260 metres could be taken. If this risk were to materialise, Barry Harbour could disappear. In terms of mitigation plans, NRW's current intention is to "maintain and upgrade existing defences, subject to approvals, to manage risks to critical transport links". Further along the coast, Wales' arguably most famous golf club, Royal Porthcawl, could also lose parts of its fairways as erosion strips away land. Some of the places in North Wales most at risk of coastal erosion Before we show you some maps of costal erosion we need to explain what they actually show. Coastal erosion risk is shown as three coloured bands on the map. This is what the different colours mean: The coloured bands show the mid range (50 percentile confidence) erosion estimate as land loss in metres for each time period. The land loss is measured from the position of the cliff edge as it was in 2005. If you go to the Natural Resources Wales website you can see the full map and see how much land could be lost. It is important to note that these images only show the risks if there is no investment in coastal defences and the coastline is allowed to evolve naturally. You can see the risk level estimates after coastal defences on the NRW website. Llŷn Peninsula Numerous parts of Anglesey are at risk to coastal erosion Other areas at risk across Wales include in Barry, Porthcawl, Tenby, Gower, Rhosilli, Skomer Island, Haverfordwest, Fishguard, Cardigan, New Quay, Ceredigion, Aberystwyth. Cardiff is not significantly at risk of coastal erosion, however there are flood risks in parts in the coming years. In Newport, there is also little risk from coastal erosion. But parts of central Newport and Caerleon have a risk of flooding in the coming years as water levels rise. Sign up for the North Wales Live newsletter sent twice daily to your inbox Find out what's happening near you