The tide between the Atlantic and the North Sea is forced through the narrow firth between Caithness and Orkney. In the model the stream runs at more than 8 knots off Stroma and Duncansby Head, among the fastest tidal streams around Britain. The chart shows the tide at Wick and the stream in the firth.
Source: Model: E.U. Copernicus Marine Service, Atlantic-European North-West Shelf Analysis and Forecast (NWSHELF_ANALYSISFORECAST_PHY_004_013, 1.5 km), hourly surface current and sea level
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