In short
One Settings panel controls every unit Seabreeze displays (wind, wave, tide, temperature and rain), the site's appearance, and which colour means "strong wind" on every arrow across the whole site.
Weather Settings sits in the same place as Favourites and Help on every weather page's side menu, so it's always one step away no matter which forecast you're looking at. Changing anything here updates every graph, table and forecast across the site immediately, there's no need to set it more than once.
Units, in what you actually think in
Wind speed offers knots (the sailing and aviation standard), km/h (what the news uses), m/s (favoured by some technical and model users), and "Km/h + Knots", the classic Seabreeze dual display showing both together. Wave and tide height switch between feet, still how a lot of surfers talk swell size, and metres, the official Bureau unit. Temperature switches between Celsius and Fahrenheit, and rain between millimetres and inches.
Appearance
Choose Light, Dark, or System default, which follows your device's own setting automatically and switches with it. Subscribers unlock a handful of extra colour palettes, Ocean, Mist, Slate, Graphite, Spice, Sage and Plum, if you'd like the site to look like more than just light or dark.
Wind Arrow Colours
This is the one setting worth actually understanding rather than guessing at: choose whether red or green marks the strongest wind on every arrow, graph and station table site-wide. There's real history behind why Seabreeze offers both conventions side by side, covered in full in Arrow colours and wind direction .