C4ST

C4ST is the coastal forecast tool built for Australian surfers, swimmers, and fishermen who demand more from their weather app.

Combining tide predictions, swell forecasts, and wind data into a single unified chart, C4ST gives you the complete coastal picture at a glance — no switching between apps, no digging through numbers.

KEY FEATURES • Unified tide + swell + wind graph across 7 days • Tap any day for a detailed breakdown — tide times, swell height & period, wind speed & direction • Conditions rating: Glassy, Clean, Choppy, or Blown Out • Moon phase & sunrise/sunset times • Shark activity alerts for your local beach • 73 beaches across all 6 Australian states • Locate your nearest beach or search by name • Save your favourite spots for quick access • Light & dark mode • Metric & imperial units, 12h & 24h time

Powered by real forecast data from Open-Meteo, updated continuously.

C4ST cuts through the noise and puts what matters front and centre — exactly the way serious ocean-goers need it.