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 southerly swell was well aligned, but periods were mostly under 10 seconds and the 10 mph cross-onshore wind roughened conditions. Observed inshore significant wave height averaged about 1.6ft, confirming modest surf rather than large beach waves.
Generated from the completed forecast and observations shown on this page.
Day at a glance
Observed in west Cornwall
Wind veering south-easterly to southerly
SSE 147°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. falling 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.
| Metric | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Godrevy forecast weather (3-hourly) | ||||||||||||||||||||||||
| Observed weather | ||||||||||||||||||||||||
| Observed wind (mph) | 6S | 7S | 7S | 5S | 8S | 6SSE | 6SSE | 6SSE | 9SSE | 10SSE | 12SE | 13SE | 14SE | 13SE | 13ESE | 15ESE | 13ESE | 16ESE | 15ESE | – | – | – | – | – |
| Sevenstones Significant wave height (ft) | 2.3 | 3.0 | 3.0 | 3.0 | 2.6 | 2.3 | 2.3 | 2.3 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 1.6 | 1.6 | 1.6 | 2.0 | 2.3 | 2.0 | 2.0 | 2.0 |
| Sevenstones Observed wave period (s) | 8.0 | 8.7 | 8.2 | 7.6 | 7.8 | 8.0 | 7.5 | 7.6 | 7.4 | 7.3 | 7.4 | 7.5 | 6.7 | 7.0 | 6.8 | 6.0 | 5.7 | 5.7 | 5.6 | 5.4 | 4.9 | 5.0 | 5.2 | 5.1 |
| 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) | 3.0 | 3.3 | 3.0 | 3.0 | 3.0 | 3.3 | 3.0 | 3.3 | 3.0 | 3.9 | 3.6 | 3.6 | 4.3 | 3.6 | 3.9 | 4.6 | 4.9 | 5.2 | 4.6 | 3.6 | 4.3 | 4.6 | 5.6 | 4.6 |
| Brittany Observed wave period (s) | 8.5 | 8.5 | 7.8 | 8.0 | 7.1 | 6.9 | 8.0 | 7.8 | 5.8 | 3.8 | 5.3 | 4.9 | 5.6 | 4.3 | 8.3 | 5.1 | 5.1 | 6.0 | 5.2 | 5.3 | 6.7 | 6.0 | 7.1 | 7.1 |
| Brittany Observed wave direction | NNW 344° | NNW 334° | N 6° | ENE 74° | NE 39° | E 88° | NE 35° | NW 322° | ENE 60° | S 186° | SSE 166° | S 179° | SSE 161° | S 176° | WNW 288° | SSW 204° | S 188° | S 190° | SSW 197° | SSE 148° | SW 224° | S 186° | SSW 196° | SW 218° |
| Porthleven Significant wave height (ft) | 1.5 | 1.6 | 1.7 | 1.7 | 1.7 | 1.7 | 1.6 | 1.6 | 1.5 | 1.5 | 1.6 | 1.5 | 1.4 | 1.5 | 1.6 | 1.6 | 1.5 | 1.5 | 1.6 | 1.4 | 1.3 | 1.3 | 1.0 | 1.0 |
| Porthleven Observed wave period (s) | 9.1 | 9.1 | 8.3 | 8.3 | 8.3 | 8.3 | 7.7 | 7.7 | 7.7 | 7.7 | 7.1 | 7.1 | 8.3 | 6.7 | 6.7 | 3.6 | 7.1 | 7.7 | 7.1 | – | 7.1 | 3.8 | 7.1 | – |
| Porthleven Observed wave direction | SSW 208° | SSW 210° | SSW 208° | SSW 212° | SSW 212° | SW 217° | SW 215° | SW 219° | SW 222° | SW 224° | SW 214° | SSW 201° | SSW 205° | SSW 197° | SSW 204° | SSW 193° | SW 228° | SW 228° | SW 235° | S 172° | SW 224° | S 181° | SW 214° | SW 231° |
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