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, mixed waves at Porthleven: the well-aligned WSW inshore signal and roughly 10-second peak period supported surf, while WNW cross-onshore winds made it messy. Observations confirmed the modelled sea state; Brittany’s angled swell was reduced, and Sevenstones’ direction was unavailable.
Generated from the completed forecast and observations shown on this page.
Day at a glance
Observed in west Cornwall
Wind backing north-westerly to south-westerly
WNW 285°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. steady height trend; medium confidence from metoffice. Open the Sevenstones archive.
Bay of Biscay southerly-swell signal
24 readings. steady height trend; high confidence from metoffice. Open the Brittany archive.
South-coast inshore response
48 readings. steady 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 9.9 | Approximately 12.7 | Approximately 15.3 | Approximately 17.0 | Approximately 17.3 | Approximately 16.3 | Approximately 14.2 | Approximately 11.5 | Approximately 8.9 | Approximately 6.9 | Approximately 6.1 | Approximately 6.7 | Approximately 8.9 | Approximately 12.2 | Approximately 15.5 | Approximately 18.0 | Approximately 19.1 | Approximately 18.4 | Approximately 16.3 | Approximately 13.2 | Approximately 9.9 | Approximately 6.9 | Approximately 5.0 | Approximately 4.7 |
| St. Ives tide (ft) | – | – | – | High17.4 | – | – | – | – | – | – | Low6.1 | – | – | – | – | – | High19.1 | – | – | – | – | – | Low4.6 | – |
| Godrevy forecast weather (3-hourly) | ||||||||||||||||||||||||
| Observed weather | ||||||||||||||||||||||||
| Observed wind (mph) | 8WSW | 6SW | 6SSW | 5SSW | 5SW | 4SSW | 4SSW | 3SW | 9NNW | 14N | 15N | 16NNW | 19NNW | 16NW | 17NW | 16NW | 16WNW | 15WNW | 13WNW | 15WNW | 13WNW | 14WNW | 14WNW | 12NW |
| Sevenstones Significant wave height (ft) | 6.2 | 6.2 | 6.2 | 6.6 | 5.9 | 5.6 | 5.6 | 5.9 | 5.6 | 5.9 | 5.6 | 5.6 | 4.9 | 4.9 | 5.6 | 4.9 | 5.2 | 5.6 | 6.6 | 6.6 | 6.2 | 6.9 | 7.2 | 7.2 |
| Sevenstones Observed wave period (s) | 7.6 | 8.0 | 8.0 | 7.9 | 7.7 | 8.2 | 8.5 | 7.6 | 7.9 | 7.3 | 7.4 | 7.0 | 6.8 | 7.1 | 7.0 | 6.6 | 6.6 | 7.3 | 7.1 | 6.7 | 7.2 | 7.2 | 7.4 | 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) | 7.2 | 7.5 | 7.9 | 10.2 | 11.5 | 11.5 | 10.8 | 11.2 | 9.8 | 12.1 | 11.2 | 11.2 | 7.5 | 8.9 | 10.2 | 9.5 | 7.5 | 8.9 | 10.8 | 7.2 | 11.8 | 9.5 | 6.9 | 9.5 |
| Brittany Observed wave period (s) | 11.1 | 9.5 | 8.5 | 6.4 | 6.2 | 9.1 | 8.3 | 7.8 | 9.1 | 8.3 | 7.8 | 7.1 | 6.9 | 8.3 | 7.1 | 9.5 | 6.9 | 7.8 | 7.8 | 9.8 | 9.1 | 9.1 | 8.8 | 8.3 |
| Brittany Observed wave direction | W 261° | WNW 290° | WNW 293° | W 274° | SW 232° | W 270° | SW 229° | WNW 284° | W 266° | W 272° | NW 321° | NW 317° | NW 321° | W 271° | NW 305° | WNW 292° | NNW 345° | NW 318° | WNW 300° | NW 319° | NW 305° | NNW 341° | NW 315° | W 270° |
| Porthleven Significant wave height (ft) | 4.3 | 4.3 | 4.3 | 4.7 | 4.5 | 4.6 | 4.2 | 3.8 | 3.5 | 3.3 | 3.1 | 3.0 | 3.0 | 3.1 | 3.2 | 3.3 | 3.6 | 3.6 | 3.8 | 3.9 | 3.8 | 3.9 | 3.7 | 4.1 |
| Porthleven Observed wave period (s) | 10.5 | 10.5 | 10.0 | 11.8 | 10.0 | 10.0 | 10.5 | 10.0 | 10.0 | 11.1 | 10.5 | 11.1 | 10.5 | 10.0 | 10.0 | 9.1 | 9.1 | 9.1 | 10.0 | 9.1 | 9.1 | 10.0 | 9.1 | 8.3 |
| Porthleven Observed wave direction | WSW 248° | WSW 243° | WSW 246° | WSW 239° | WSW 246° | WSW 242° | WSW 241° | WSW 238° | WSW 245° | WSW 242° | WSW 242° | WSW 242° | WSW 245° | WSW 249° | WSW 246° | WSW 249° | WSW 245° | WSW 241° | WSW 239° | WSW 238° | WSW 238° | SW 232° | SW 235° | SW 233° |
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