Dip Report is a free app built specifically for open water and sea swimmers in Ireland. Whether you swim at the Forty Foot in Sandycove, Seapoint, Killiney, Tramore, Portmarnock, or any of Ireland's hundreds of coastal spots, Dip Report gives you the information you actually need before you get in the water.
Unlike generic weather apps, Dip Report combines wave height, swell direction, wind speed, tide levels, sea temperature, and rain probability into a single swimmer-focused view. No clutter, no irrelevant data — just the conditions that matter for your dip.
Available as a Progressive Web App (PWA) you can install directly to your home screen, and as a native Android app, Dip Report works seamlessly across all your devices.
Features
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Roughness Index
A custom safety score from 0 (Calm) to 100 (Unsafe) weighing wave height, wind, and swell direction.
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7-Day Forecast
Hour-by-hour coastal forecasts combining Met Éireann, Marine Institute, and Open-Meteo data.
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Tide Data
Real-time and predicted tide heights from the Marine Institute of Ireland for every forecast hour.
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Sea Temperature
Current sea surface temperature so you know exactly how cold it's going to be before you jump in.
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Community Posts
Share photos from your swim and see what other swimmers are posting from nearby spots.
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Live Webcams
Live streams for the Forty Foot (Sandycove) and Tramore beach so you can check conditions visually.
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Smart Notifications
Daily surf check alerts filtered by conditions — only get notified when it's actually good to swim.
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Home Screen Widget
Android widget showing current conditions at a glance, without opening the app.
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Social Sharing
Share forecasts and swim photos with rich preview images on WhatsApp, iMessage, and social media.
The Roughness Index
The centrepiece of Dip Report is the Roughness Index — a custom safety algorithm designed specifically for sea swimmers. It analyses wave height, wind speed, swell period, and swell direction simultaneously and produces a single score from 0 (Calm) to 100 (Unsafe).
26–55 · Swimmable for experienced swimmers. Some chop or swell present.
Rough
56–80 · Challenging conditions. Caution advised, especially for beginners.
Unsafe
81–100 · Not recommended. High waves, strong winds, or dangerous swell.
An onshore swell of 2m is treated very differently to an offshore swell of the same height — because for a swimmer, it is. The index is recalculated for every hour of the 7-day forecast.
Data Sources
Dip Report uses only professional, authoritative data sources — no amateur weather stations or unreliable feeds.
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Met Éireann
Ireland's national meteorological service, providing professional-grade Irish weather forecasts including temperature, wind speed, wind direction, and precipitation probability.
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Marine Institute Ireland
The national agency for marine research in Ireland. Provides real-time and predicted tide heights and timing for Irish coastal locations.
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Open-Meteo
Open-source weather API using high-resolution global numerical weather prediction models (ECMWF, GFS). Provides wave height, swell direction, swell period, and sea surface temperature.
Smart Notifications
Never miss a good swimming window. Set up to three daily notification schedules, each with its own time, days of the week, and filtering rules:
Good Conditions Only — only notified when the Roughness Index is Calm or Medium
High Tide Only — only notified when the tide is near its peak
Low Rain Only — only notified when rain probability is under 10%
Forecast Offset — get notified at 9am about conditions at 1pm (+4 hours)
Day Selection — choose which days of the week each schedule applies to
Community Photo Posts
Dip Report has a built-in community feed where swimmers share photos and comments from their local spots. Posts are sorted by proximity so you always see what's happening nearby first.
Post photos directly from your camera or gallery
See posts from swimmers near your current location
Share posts via WhatsApp, iMessage, or any social platform with rich link previews
Delete your own posts at any time
Install as an App
Dip Report is a Progressive Web App (PWA) — install it directly to your home screen from any modern browser without going through an app store. Works on iOS (Safari), Android (Chrome), and desktop. On Android you can also download the native Android app for home screen widgets.
Dip Report is built for anyone who swims in the sea around Ireland:
Daily open water swimmers and cold water dippers
Wild swimmers exploring new coastal locations
Triathletes and open water racing swimmers
Surfers and bodyboarders checking swell conditions
Anyone who wants to know if it's safe to get in the water today
The app is completely free to use with no ads, no subscriptions, and no data selling. It's a passion project built by and for the Irish sea swimming community.