<div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The downpour across coastal NSW is forecast to reach peak strength on the weekend, accompanied by damaging winds and heavy seas.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>A low-pressure system expected to be sitting off the coast tomorrow is set to quickly gain strength by Saturday, reports Weatherzone.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The cold and soaking conditions are also being fuelled by cold upper-level air combined with moisture.</span></div></div><div><div id="adspot-mobile-medium"></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><strong><span>READ MORE:</span></strong><span> </span><a href="https://www.9news.com.au/national/millions-of-commuters-to-get-free-travel/6202a8b7-754d-41af-8e58-e5bf795faebc" target="_blank"><strong><span>Millions of Sydney commuters ride free as gates turned off</span></strong></a></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Weather forecasters say further modelling is needed to pinpoint which areas of NSW will be hardest hit by the extreme conditions through the weekend.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>But they are warning the Mid North Coast and the South Coast should expect falls of 100mm to 150mm over a period of 36 to 48 hours between Friday and Sunday.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Aside from the rainfall, coastal areas can expect to be battered by gales from the Tasman Sea, with waves as high as six metres in some parts.</span></div></div><div><div class="OUTBRAIN" data-reactroot="" data-src="//www.9news.com.au/national/more-heavy-rain-and-strong-winds-to-batter-nsw-coast-on-weekend/5924cd6f-12ba-4367-bae5-78222bb64ba4" data-widget-id="AR_5"></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The largest waves are most likely between Byron Bay and Seal Rocks, with significant wave heights reaching between 4.5 metres and 5.5 metres late on Sunday and into Monday.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>But forecasters say, given maximum wave heights usually double the significant wave height, parts of NSW's coastline could record seas of 10 metres high at times.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><strong><span>READ MORE:</span></strong><span> </span><a href="https://www.9news.com.au/national/feels-like-temperature-vs-actual-what-is-the-difference-explained/ad93cb4f-9d11-4dd4-ba19-df84bdb25971" target="_blank"><strong><span>Do you rely on the 'feels like' temperature or the actual one?</span></strong></a></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The powerful swells will also increase the risk of coastal erosion at hotspots, such as Sydney's Collaroy Beach, Byron Bay's Main Beach and the Central Coast's Wamberal Beach.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Surfers can look forward to cleaner and calmer conditions next week when the strong south-to-south-easterly winds ease.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><a href="https://www.9news.com.au/national/how-to-follow-9news-digital/29855bb1-ad3d-4c38-bc25-3cb52af1216f" target="_blank"><strong><em><span>DOWNLOAD THE 9NEWS APP</span></em></strong></a><strong><em><span>: Stay across all the latest in breaking news, sport, politics and the weather via our news app and get notifications sent straight to your smartphone. Available on the</span></em></strong><strong><span> </span></strong><a href="https://apps.apple.com/au/app/9news/id1010533727" target="_blank"><strong><em><span>Apple App Store</span></em></strong></a><strong><span> </span></strong><strong><em><span>and</span></em></strong><strong><span> </span></strong><a href="https://play.google.com/store/apps/details?id=nineNewsAlerts.nine.com&amp;hl=en_AU&amp;pli=1" target="_blank"><strong><em><span>Google Play</span></em></strong></a><strong><em><span>.</span></em></strong></div></div>