Historical surf replay
Mount's Bay conditions using shared west Cornwall weather forecasts and observations, Porthleven inshore readings, and offshore signals from Sevenstones and Brittany in the Bay of Biscay. Each source keeps its own location and role so the view provides coastal context without presenting nearby buoy readings as measurements at the surf break.
There were small, messy waves at Porthleven: the aligned south-west inshore signal averaged 3.9ft with a short 6.6-second peak period, while 12mph westerly cross-onshore wind made conditions choppy. Brittany’s longer-period WNW swell was largely sheltered, so it did not translate into larger surf here.
Generated from the completed forecast and observations shown on this page.
Day at a glance
Observed in west Cornwall
Wind mostly westerly
W 272°cross-onshore
24 observations. Godrevy is close enough to provide useful regional wind context for both coasts, although local effects can differ. Explore all weather readings.
Atlantic and Western Approaches signal
24 readings. rising height trend; medium confidence from metoffice. Open the Sevenstones archive.
Bay of Biscay southerly-swell signal
24 readings. rising height trend; high confidence from metoffice. Open the Brittany archive.
South-coast inshore response
48 readings. falling height trend; high confidence from cco. Open the Porthleven archive.
These sources describe different locations and exposures. Offshore and inshore buoy readings provide context for Mount's Bay; they are not measurements taken at the surf break itself. Directional labels use Porthleven as a representative south-west-facing swell window; individual peaks and beaches can differ.
The charts share the same time axis so offshore signals, inshore readings and regional wind can be compared without treating them as the same measurement location.
Two line charts show wave height and wind speed through the selected day for Mount's Bay. The detailed table following the charts contains the same values in text form.
St. Ives high/low predictions show stored UK local times in the hour they occur. Hourly heights marked ≈ are smooth estimates between those events, not official hourly predictions or observed water levels. Event values marked ≈ have approximate or unspecified source precision. A dash means no event or no supported estimate. St. Ives is a north-coast reference station. Tide times and heights in Mount's Bay differ.
| Metric | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| St. Ives tide height, estimated (ft) | Approximately 16.0 | Approximately 13.3 | Approximately 10.4 | Approximately 8.0 | Approximately 6.6 | Approximately 6.5 | Approximately 7.9 | Approximately 10.4 | Approximately 13.3 | Approximately 15.8 | Approximately 17.2 | Approximately 17.3 | Approximately 16.2 | Approximately 14.2 | Approximately 11.7 | Approximately 9.4 | Approximately 7.8 | Approximately 7.1 | Approximately 7.7 | Approximately 9.4 | Approximately 11.7 | Approximately 14.0 | Approximately 15.9 | Approximately 16.7 |
| St. Ives tide (ft) | – | – | – | – | Low6.4 | – | – | – | – | – | High17.4 | – | – | – | – | – | – | Low7.1 | – | – | – | – | – | High16.7 |
| Godrevy forecast weather (3-hourly) | ||||||||||||||||||||||||
| Observed weather | ||||||||||||||||||||||||
| Observed wind (mph) | 17SW | 19SW | 15SW | 19WSW | 19SW | 19WSW | 15WSW | 11WNW | 10W | 11W | 11W | 13WNW | 12NW | 11WNW | 11NW | 10WNW | 8W | 8WNW | 8W | 10WNW | 7WNW | 7WNW | 5W | 8WNW |
| Sevenstones Significant wave height (ft) | 4.3 | 4.3 | 4.6 | 5.2 | 4.9 | 6.2 | 6.2 | 5.9 | 6.6 | 5.9 | 5.2 | 5.6 | 5.6 | 5.2 | 4.9 | 4.6 | 4.6 | 5.9 | 5.6 | 6.6 | 6.6 | 7.5 | 7.2 | 6.2 |
| Sevenstones Observed wave period (s) | 6.2 | 6.2 | 6.4 | 6.5 | 6.6 | 7.0 | 7.0 | 7.3 | 7.2 | 6.9 | 7.3 | 7.2 | 7.0 | 7.0 | 6.8 | 7.1 | 7.6 | 7.4 | 7.4 | 7.7 | 8.1 | 8.3 | 8.6 | 8.4 |
| Sevenstones Observed wave direction | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable |
| Brittany Significant wave height (ft) | 4.6 | 3.6 | 3.9 | 3.6 | 4.9 | 4.3 | 3.9 | 4.6 | 4.3 | 5.9 | 4.6 | 6.6 | 4.9 | 5.9 | 5.2 | 6.6 | 4.9 | 5.2 | 5.2 | 4.6 | 7.2 | 5.2 | 6.6 | 7.5 |
| Brittany Observed wave period (s) | 9.5 | 8.3 | 8.5 | 7.3 | 8.8 | 8.5 | 5.7 | 7.8 | 8.8 | 8.8 | 8.3 | 8.0 | 8.3 | 9.1 | 8.8 | 8.8 | 8.8 | 9.1 | 8.3 | 14.2 | 10.2 | 14.2 | 12.2 | 9.8 |
| Brittany Observed wave direction | WNW 285° | WNW 282° | NW 311° | WNW 283° | NW 314° | NW 320° | WNW 288° | WNW 303° | NW 322° | WNW 295° | W 281° | WNW 295° | WNW 296° | NW 307° | WNW 286° | NW 307° | NW 312° | WNW 292° | WNW 291° | NW 315° | NNW 328° | NW 319° | NW 323° | NW 321° |
| Porthleven Significant wave height (ft) | 4.2 | 4.1 | 4.4 | 4.5 | 4.7 | 4.6 | 4.9 | 5.0 | 4.4 | 4.6 | 4.3 | 4.4 | 3.7 | 3.8 | 3.2 | 3.3 | 3.0 | 3.1 | 2.7 | 2.8 | 2.9 | 3.1 | 2.9 | 3.1 |
| Porthleven Observed wave period (s) | 5.3 | 5.3 | 5.0 | 5.6 | 5.6 | 6.3 | 6.3 | 5.6 | 6.7 | 6.7 | 7.1 | 6.7 | 6.3 | 6.3 | 5.6 | 5.6 | 7.1 | 5.6 | 8.3 | 6.3 | 8.3 | 8.3 | 8.3 | 8.3 |
| Porthleven Observed wave direction | WSW 236° | SW 228° | SW 222° | SW 222° | SW 224° | SW 231° | SW 232° | SW 228° | WSW 239° | SW 235° | WSW 242° | WSW 241° | WSW 238° | SW 232° | SW 229° | SW 224° | WSW 239° | SW 233° | SW 235° | WSW 239° | WSW 248° | WSW 250° | WSW 243° | WSW 248° |
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