Jersey Tides

Project type: experiment

Offline tide predictions for Jersey, Channel Islands. Work in progress.

TypeScript Node.js
GitHub

A locally-focused utility app providing tide predictions for St. Helier harbour in Jersey, Channel Islands. Built as a Progressive Web App for offline access - essential for an island community.

Overview

Jersey Tides delivers accurate tide times and heights for St. Helier, combined with sunrise and sunset data. The app is designed for Jersey residents and visitors who need reliable tide information for fishing, beach activities, harbour access, or simply planning their day around the tides.

Features

Tide Predictions

  • High and low tide times for St. Helier
  • Tide height information
  • Multi-day forecasts for planning ahead

Sunrise and Sunset Data

  • Daily sunrise and sunset times
  • Useful for combining with tide data for activities like early morning fishing or evening beach walks

Progressive Web App

  • Installable: Add to home screen on iOS and Android
  • Offline Support: Works without internet connection once installed
  • Fast Loading: Minimal bundle size for quick access

Technical Implementation

Built with modern web technologies:

  • Astro - Static site generation for optimal performance
  • TypeScript - Type-safe development
  • PWA APIs - Service workers for offline functionality

Jersey Focus

This is a hyper-local utility built specifically for the Jersey community. The Channel Islands have significant tidal ranges - among the largest in the world - making accurate tide information essential for daily life on the island.

Future Considerations

  • Calendar feed integration (iCal format)
  • Widget support for iOS and Android
  • Additional Jersey-specific data (weather, sea conditions)
  • Multiple location support around the island