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Historical surf replay

Mount's Bay surf conditions on Tue, Aug 11, 2026

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.

Day at a glance

Forecast and observations in their coastal context

Observed in west Cornwall

Godrevy wind and weather

Wind speed
3–18 mph

Wind mostly easterly

ESE 105°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

Sevenstones

Significant wave height
1–2.3 ft
Average period
4.7–7s
Reported wave direction
Unavailable
Exposure unavailable

24 readings. steady height trend; medium confidence from metoffice. Open the Sevenstones archive.

Bay of Biscay southerly-swell signal

Brittany

Significant wave height
2–3.6 ft
Peak period
3.9–12.8s
Peak wave direction
NW 308°
largely sheltered from this direction

24 readings. steady height trend; high confidence from metoffice. Open the Brittany archive.

South-coast inshore response

Porthleven

Significant wave height
0.7–1.3 ft
Peak period
3.9–15.4s
Peak wave direction
SSW 211°
well aligned with this coast

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.

Hour-by-hour replay

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.

Swell and sea height through the day

Wind speed through the day

Metrics are rows; hours run left to right. Times use your device time zone.
Hourly forecast and observation values
Metric
Godrevy forecast weather (3-hourly)
Observed weather
Observed wind (mph)6NE5ENE5ENE5ENE4NE3S7ESE9ESE11SE13SE13SE12SE10ESE12ESE13ESE16ESE17ESE17ESE18ESE16ESE11E13E15E16ESE
Sevenstones Significant wave height (ft)1.62.01.61.62.01.61.61.61.31.01.01.01.01.01.01.01.31.61.62.32.02.01.61.6
Sevenstones Observed wave period (s)6.37.06.56.36.36.16.15.86.56.26.36.06.57.06.56.35.14.85.24.84.94.75.46.4
Sevenstones Observed wave directionUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailable
Brittany Significant wave height (ft)3.03.02.62.62.62.62.32.32.32.02.32.32.32.32.32.02.02.02.62.02.33.03.63.0
Brittany Observed wave period (s)9.19.56.49.58.08.58.58.89.13.97.56.110.24.111.112.8–12.211.111.110.210.29.89.1
Brittany Observed wave directionNNW 330°NW 326°NNW 327°NW 325°NW 325°NW 321°NW 315°NNW 344°NW 310°ESE 107°NW 326°WNW 289°NW 308°ESE 109°WNW 303°WNW 296°E 94°W 266°W 260°WNW 292°WNW 296°W 267°W 280°W 274°
Porthleven Significant wave height (ft)0.90.80.91.01.11.01.00.80.80.90.80.80.80.91.01.01.11.01.01.00.80.60.70.8
Porthleven Observed wave period (s)7.77.17.76.77.16.76.77.16.77.16.76.76.36.33.86.312.513.312.512.514.314.314.311.8
Porthleven Observed wave directionSW 221°SW 233°SW 225°SW 221°SW 232°SW 228°SW 232°SW 225°SW 215°SW 218°SW 214°SSW 203°SW 215°SW 219°S 177°SW 228°ENE 69°SE 138°ESE 115°ESE 117°SSE 153°SW 221°WSW 243°SW 225°

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