Jersey Tides

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.

Jersey Tides delivers accurate tide times and heights for St. Helier, combined with sunrise and sunset data - designed for 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 heights, and multi-day forecasts for planning ahead
• Sunrise and sunset data - daily sunrise and sunset times, useful alongside the tides for early morning fishing or evening beach walks
• Progressive Web App - installable on iOS and Android, works offline once installed, with a 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