1. Choose a location
Search for a UK town or coastal area. Seyva uses the selected coordinates and identifies a nearby tide station.
2. Combine the live data
The service brings together hourly weather, tide events, sea temperature where available, and current water-quality information.
3. Match an activity window
For the public page, paddleboarding uses a 7 mph maximum wind and 12°C minimum air temperature. Swimming uses an 11 mph maximum wind. Kayaking accepts any tide, caps wind at 12 mph, avoids location-based offshore directions, requires at least 8°C air temperature and keeps the full session between sunrise and sunset. Current pollution checks are included. These are broad starter settings, not personal advice.
4. Show the clearest result
Excellent means a window matches the settings without identified warnings. Good means the window is usable but includes a caution. No match means the available windows did not meet the starter settings.
Forecasts and feeds can be delayed, incomplete or wrong. Always recheck official and local information before entering the water.
Website, Free app and Seyva+
The app is in testing. This is the agreed offer being introduced; paid subscriptions are not live yet.
Website: a quick public check
Check up to five available forecast days of weather, tides and activity suggestions using public starter settings. No account needed.
Free app: times that fit your preferences
Choose up to two activities and set your preferences. Check up to five available days of weather and tides. Full details are included for your next two sessions, in time order across your activities. This means two activity sessions, not two calendar days.
Optional ad: unlock another session
Tap a locked activity and choose to watch one ad. Its full details stay unlocked until your activity finishes, even if you close and reopen the app. You do not need to watch again for that activity. Tracking is not included. Ad availability depends on the test build and location.
Seyva+: planning and follow-up
Use every available activity, open all session details, plan across up to 14 available forecast days, and track your sessions with alerts when conditions change. No ads.
Planned launch price: £2.99/month with an optional 14-day free trial. No trial starts automatically. Current app trials are test access with no payment or automatic renewal.
Essential warnings and available water-quality information stay accessible. Forecast coverage depends on the data returned; Seyva does not invent missing days.