4 ms·
Show HN: SwellSlots – Grid Based Surf Forecast App with a Street Fighter 2 UI
I discovered surfing last year in my early 40's its been a journey and a half and more fun than taking up golf at my age.
SwellSlots squeezes swell height, period, wind speed/direction, and tide state into a color-coded weekly grid. One glance tells you when conditions are 'good' for the next few days.
I wanted it to look completely different to what was out there (UI wise), as most of the forecast apps looks very clinical and cold.
Some technical details:
- SvelteKit + TailwindCSS 4, deployed on Hetzner (LOVE their cloud-console-ux! So simple)
- 2,000+ surf spots worldwide (sourced via a separate AI-assisted pipeline I call "Surf Scout" — got ~80% accuracy, rest is manual curation)
- The spot database was its own challenge — Google Maps couldn't distinguish surf beaches from swim beaches, and LLMs got about 75–80% of the way there
I'd really appreciate feedback on:
- Is the grid scannable enough on first visit?
- Any surf spots missing from your area?
- What else would you like to see?
EDIT - Formatting
- dolder14 6mo agoFun take on a surf forecast, nice job. grid is scannable, but the background makes the readability a bit much (to read/scan quickly). Santa Cruz area is missing spots (refer to Surfline for all the in-betweens between the lane and the hook). Cams are king - if there are any public cams to tap into, that's the Hadouken
- rawoke083600 6mo agoAhh thank you for checking it out. Yea the surf spots turned out to be the hard part. Will look at readability.
- valeriozen 6mo ago[dead]