If you purchase an independently reviewed product or service through a link on our website, WWD may receive an affiliate commission. The dog days of summer don’t have to put a damper on a great hair day. All it takes is a refresh of your cache of hair styling tools and products that cater best to humid days — and a new set of styling inspiration that align with 2025’s top hair trends of the season. In recent fashion runway shows and this past award season’s red carpets, we’ve seen trendsetters and beauty tastemakers opt for effortless-looking hair styles that appear less fussy and slightly undone — think mermaidcore beach waves that veer towards bedhead vs. pristine ringlets. That doesn’t mean a polished hairdo is off the table: For 2025, the bouncy blowout has gotten bigger, with stars like Kaia Gerber and Sabrina Carpenter regularly donning bombshell styles that channel an oh-so-’90s take on Old Hollywood hair. On TikTok, this has led to a “Topanga hair” trend, referencing ...