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 moderate, well-aligned waves at Porthleven, but they were messy: the observed SW swell reached this south-west-facing coast, while mostly onshore SSW winds around 12 mph degraded cleanliness. The observed inshore signal confirmed rising surf, with an average peak period of 8.4 seconds.
Generated from the completed forecast and observations shown on this page.
Day at a glance
Observed in west Cornwall
Wind mostly south-westerly
SSW 211°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. rising 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 4.4 | Approximately 2.7 | Approximately 3.3 | Approximately 6.3 | Approximately 10.9 | Approximately 15.8 | Approximately 19.6 | Approximately 21.2 | Approximately 20.3 | Approximately 17.5 | Approximately 13.4 | Approximately 8.9 | Approximately 5.2 | Approximately 3.1 | Approximately 3.1 | Approximately 5.7 | Approximately 10.1 | Approximately 15.1 | Approximately 19.4 | Approximately 21.8 | Approximately 21.6 | Approximately 19.2 | Approximately 15.2 | Approximately 10.6 |
| St. Ives tide (ft) | – | Low2.6 | – | – | – | – | – | High21.2 | – | – | – | – | – | Low2.8 | – | – | – | – | – | High22.0 | – | – | – | – |
| Godrevy forecast weather (3-hourly) | ||||||||||||||||||||||||
| Observed weather | ||||||||||||||||||||||||
| Observed wind (mph) | 6SSW | 7SW | 6SSW | 3S | 6SSW | 9SSW | 8SSW | 8S | 10SW | 14SSW | 17SSW | 19S | 19S | 18SW | 10S | 16SW | 16SW | 19SW | 17SW | 19SW | 15WSW | 13SW | 14WSW | 10SW |
| Sevenstones Significant wave height (ft) | 5.9 | 6.2 | 6.9 | 5.9 | 5.9 | 5.6 | 4.9 | 4.6 | 4.3 | 3.9 | 4.3 | 4.9 | 5.2 | 5.2 | 6.6 | 6.9 | 6.9 | 7.5 | 8.2 | 8.5 | 7.9 | 7.2 | 7.5 | 8.2 |
| Sevenstones Observed wave period (s) | 7.4 | 7.3 | 7.4 | 6.8 | 6.9 | 7.0 | 6.7 | 7.0 | 6.9 | 6.7 | 7.0 | 6.9 | 6.8 | 6.7 | 7.2 | 7.4 | 7.2 | 7.2 | 7.2 | 7.1 | 7.2 | 7.1 | 7.3 | 7.2 |
| 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) | 6.2 | – | 7.2 | 6.6 | 6.9 | 6.6 | 5.9 | 7.9 | 7.9 | 8.9 | 9.2 | 9.2 | 9.8 | 9.5 | 9.2 | 8.5 | 10.5 | 13.1 | 10.8 | 10.8 | 12.8 | 14.4 | 9.5 | 11.5 |
| Brittany Observed wave period (s) | 8.5 | 8.3 | 8.3 | 5.2 | 6.1 | 9.8 | 9.5 | 7.3 | 8.5 | 7.5 | 8.0 | 6.7 | 6.6 | 7.8 | 9.5 | 6.0 | 9.8 | 10.2 | 10.2 | 9.5 | 8.0 | 10.2 | 9.8 | 10.2 |
| Brittany Observed wave direction | WNW 299° | W 276° | WNW 296° | W 280° | WSW 249° | WNW 299° | WNW 298° | W 270° | WNW 285° | W 279° | W 274° | W 269° | W 261° | W 281° | W 280° | WSW 254° | WNW 286° | WNW 294° | WNW 295° | W 281° | W 267° | WNW 296° | W 275° | WNW 289° |
| Porthleven Significant wave height (ft) | 5.5 | 4.8 | 5.3 | 4.8 | 5.0 | 5.1 | 5.2 | 5.6 | 5.1 | 4.8 | 4.2 | 4.4 | 4.3 | 4.3 | 4.5 | 5.0 | 5.0 | 5.4 | 6.3 | 7.0 | 7.9 | 7.3 | 7.4 | 6.5 |
| Porthleven Observed wave period (s) | 9.1 | 9.1 | 9.1 | 9.1 | 9.1 | 8.3 | 8.3 | 8.3 | 8.3 | 9.1 | 8.3 | 7.7 | 7.7 | 10.5 | 10.0 | 9.1 | 8.3 | 7.7 | 7.1 | 7.1 | 7.7 | 8.3 | 7.7 | 10.0 |
| Porthleven Observed wave direction | SW 218° | SW 228° | SW 229° | SW 233° | WSW 236° | WSW 236° | WSW 238° | WSW 242° | SW 232° | WSW 239° | SW 225° | SSW 204° | SSW 208° | WSW 238° | SW 232° | WSW 238° | WSW 236° | SW 235° | WSW 238° | SW 235° | WSW 238° | WSW 238° | WSW 239° | WSW 238° |
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