Know which way the water is going
Tidewater predicts tide heights and stream arrows for 140 harbours on the UK south coast. It works offline for 7 days and warns you an hour before the tide turns.
The tide, the stream, and when it turns
One screen per harbour. Drag through the day to see the height rise and fall, and watch the stream arrows swing round at the entrance.
Harbours, entrances and anchorages
Tide heights and stream arrows for the whole UK south coast.
Offline, with no signal
Sync before you leave and a week of predictions stays on the phone.
Warning before the tide turns
An alert sixty minutes before every high and low water at your harbours.
“When visiting skippers ask me about the entrance, I tell them to get Tidewater. You can see the ebb running out of Poole before you're in it.”
Three steps to your first tide
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Step 1
Download Tidewater
Free on iPhone and Android. No account and no sign-up to try it.
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Step 2
Pick three harbours
Your home port, where you're heading, and somewhere to run to. All three are free.
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Step 3
Sync before you sail
One tap stores 7 days of predictions offline and sets an alert an hour before each turn.
Before you download
The four things sailors ask us most.
Yes. Open the app while you have signal and it stores 7 days of predictions for your harbours. Heights, stream arrows and turn alerts all work with no connection. After 7 days it needs signal once to refresh.
140 harbours, entrances and anchorages along the UK south coast, from Cornwall to Kent, including Poole, the Solent and Chichester Harbour.
It's free for 3 harbours, for as long as you like. All 140 harbours cost £24 a year. You don't need an account to try it.
No. Tidewater helps you plan around the tide. Carry an up-to-date chart and use it for navigation.
Catch the next tide
Free for 3 harbours. £24 a year for all 140. No account needed to try it.