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 to moderate, clean waves at Porthleven: the well-aligned WSW swell was around 2 ft offshore with a roughly 10-second peak period. Light NNW cross-offshore winds should have kept conditions tidy, while the larger angled Brittany swell was partly reduced.
Generated from the completed forecast and observations shown on this page.
Day at a glance
Observed in west Cornwall
Wind backing northerly to westerly
NNW 334°cross-offshore
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. steady 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.
| Metric | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Godrevy forecast weather (3-hourly) | ||||||||||||||||||||||||
| Observed weather | ||||||||||||||||||||||||
| Observed wind (mph) | 3SSW | 2W | 5NE | 5ENE | 4NNE | 0N | 4WNW | 3NW | 4NNW | 5NW | 8NNW | 9N | 9NNW | 10NNW | 10NNW | 8NNW | 9NW | 10NNW | 9NW | 9NW | 8NW | 5NNW | 5NNW | 4NNW |
| Sevenstones Significant wave height (ft) | 2.3 | 2.6 | 2.6 | 2.3 | 3.0 | 3.0 | 3.0 | 3.0 | 3.3 | 3.6 | 3.6 | 4.3 | 3.9 | 3.6 | 4.3 | 3.6 | 3.3 | 3.3 | 3.6 | 3.3 | 3.0 | 3.3 | 3.0 | 3.6 |
| Sevenstones Observed wave period (s) | 8.7 | 8.1 | 7.9 | 7.6 | 7.7 | 8.0 | 8.2 | 7.8 | 8.4 | 8.8 | 9.4 | 9.4 | 9.4 | 9.4 | 10.1 | 8.7 | 8.9 | 8.6 | 8.7 | 8.6 | 8.6 | 8.8 | 8.2 | 8.9 |
| 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) | 4.3 | 3.6 | 4.3 | 4.6 | 4.9 | 5.9 | 4.6 | 6.9 | 4.6 | 6.6 | 4.3 | 6.2 | 6.2 | 4.6 | 3.3 | 4.6 | 3.6 | 4.6 | 4.6 | 3.6 | 4.9 | 4.3 | 4.3 | 3.6 |
| Brittany Observed wave period (s) | 6.4 | 9.1 | 7.8 | 11.1 | 11.1 | 10.2 | 9.8 | 9.8 | 11.1 | 10.2 | 10.2 | 9.8 | 11.1 | 10.7 | 9.8 | 9.8 | 10.2 | 10.2 | 10.2 | 10.2 | 9.1 | 8.3 | 10.2 | 9.5 |
| Brittany Observed wave direction | WSW 240° | W 259° | W 259° | W 277° | WNW 289° | W 278° | WNW 283° | WNW 285° | W 281° | W 280° | WNW 285° | W 259° | W 273° | W 261° | W 271° | W 265° | W 270° | WNW 294° | WNW 285° | WNW 303° | W 269° | W 260° | W 281° | W 280° |
| Porthleven Significant wave height (ft) | 1.3 | 1.5 | 1.8 | 1.9 | 2.2 | 2.1 | 2.6 | 2.6 | 2.3 | 2.3 | 2.0 | 1.9 | 1.9 | 1.9 | 1.9 | 1.9 | 2.3 | 2.3 | 2.6 | 2.5 | 2.5 | 2.2 | 2.0 | 1.8 |
| Porthleven Observed wave period (s) | 11.1 | 9.1 | 10.0 | 9.1 | 8.3 | 8.3 | 10.0 | 10.0 | 8.3 | 7.1 | 11.1 | 10.5 | 10.5 | 10.5 | 10.5 | 11.1 | 10.5 | 10.0 | 10.5 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 |
| Porthleven Observed wave direction | WSW 241° | WSW 241° | WSW 242° | WSW 239° | WSW 242° | WSW 248° | WSW 248° | WSW 248° | WSW 243° | SW 235° | WSW 252° | WSW 241° | WSW 243° | WSW 246° | WSW 250° | WSW 243° | WSW 255° | WSW 245° | WSW 248° | WSW 248° | WSW 248° | WSW 239° | WSW 238° | SW 235° |
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