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Historical surf replay

St Ives Bay surf conditions on Mon, Aug 17, 2026

Godrevy wave and weather forecasts and weather observations, with Sevenstones offshore and Perranporth inshore wave readings. 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.

Surf Day Summary

AI-generated summary. Hog Says

There were small, messy waves at Godrevy and Gwithian: the WNW swell was well aligned, but low-energy, with a 7.5-second primary peak period and only a 3.5-second combined-sea period. Observations broadly confirmed this, while mainly onshore 13 mph winds kept conditions untidy.

Generated from the completed forecast and observations shown on this page.

Day at a glance

Forecast and observations in their coastal context

Predicted at Godrevy

Last stored wave forecast

Primary swell height
0.5–3.2 ft
Primary swell period
3.7–9.5s
Primary swell direction
WNW 292°
well aligned with this coast
Combined sea height
2–3.3 ft
Combined sea period
3–3.7s
Combined sea direction
WNW 290°

Wind mostly westerly

WNW 289°onshore

24 stored hourly values. This is the final stored revision, not necessarily the forecast first issued for the day.

Observed in west Cornwall

Godrevy wind and weather

Wind speed
4–12 mph

Wind mostly westerly

W 279°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.

Incoming Atlantic swell

Sevenstones

Significant wave height
1.3–3.3 ft
Average period
5–6.3s
Reported wave direction
Unavailable
Exposure unavailable

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

Nearby north-coast inshore response

Perranporth

Significant wave height
1.6–3.9 ft
Peak period
3.8–8s
Peak wave direction
W 280°
well aligned with this coast

48 readings. rising height trend; high confidence from cco. Open the Perranporth archive.

How the stored wind forecast compared

Observed average wind was 4 mph lighter than the last stored forecast.

Forecast: wind mostly westerly; observed: wind mostly westerly.

Observed wind at W 279° was onshore for Godrevy and Gwithian.

These sources describe different locations and exposures. Offshore and inshore buoy readings provide context for St Ives Bay; they are not measurements taken at the surf break itself. Directional labels use Godrevy and Gwithian as a representative north-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 St Ives 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 Primary swell height (ft)0.80.70.70.70.80.80.80.81.01.11.32.02.63.22.31.40.50.50.50.50.50.60.60.5
Primary swell period (s)6.76.76.66.66.67.58.59.59.28.98.68.48.17.96.55.13.75.36.98.58.58.58.48.3
Primary swell directionW 272°W 272°W 271°W 270°W 269°W 277°WNW 285°WNW 293°WNW 292°WNW 291°WNW 291°WNW 289°WNW 287°WNW 285°NW 314°NNW 342°N 11°NNW 342°NW 314°WNW 285°WNW 285°WNW 284°WNW 283°W 267°
Godrevy Combined sea height (ft)2.02.02.12.32.62.82.92.92.92.82.72.72.62.62.62.72.72.82.82.82.82.93.13.3
Combined sea period (s)3.03.23.23.23.23.43.53.63.63.73.73.73.73.73.73.73.73.63.53.53.53.53.53.6
Combined sea directionWNW 293°WNW 289°WNW 287°WNW 286°WNW 287°WNW 288°WNW 290°WNW 291°WNW 293°WNW 294°WNW 293°WNW 292°WNW 291°WNW 290°WNW 288°WNW 286°WNW 285°WNW 286°WNW 288°WNW 289°WNW 291°WNW 292°WNW 292°WNW 290°
Godrevy forecast weather (3-hourly)
Godrevy forecast wind (mph)12WNW10W12W13W14W14W13W13W13WNW12WNW11NW11NW11NW11NW11NW11WNW11WNW12WNW13WNW14WNW15WNW15WNW16WNW16W
Observed weather
Observed wind (mph)4SW5WSW8W8W10WNW11W8WNW9W9W9W10W12WNW8NW7NW9NW9W11W11WNW12W9WNW7WNW8W7W8W
Sevenstones Significant wave height (ft)1.31.61.61.61.62.03.03.33.32.32.62.33.02.63.02.62.32.02.32.62.32.32.02.0
Sevenstones Observed wave period (s)5.25.05.25.25.55.45.55.55.86.26.35.95.86.06.06.05.85.75.55.65.76.05.95.6
Sevenstones Observed wave directionUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailableUnavailable
Perranporth Significant wave height (ft)1.71.61.61.92.33.23.23.43.63.33.13.63.02.92.62.62.93.43.33.13.22.92.92.6
Perranporth Observed wave period (s)3.84.34.74.94.75.15.15.36.16.16.56.16.57.46.55.75.45.76.16.26.95.75.46.9
Perranporth Observed wave directionWNW 300°WNW 290°W 276°WNW 284°W 278°W 281°W 274°W 274°W 281°W 266°WNW 295°W 274°WNW 300°W 274°WNW 298°WNW 284°W 276°W 276°W 267°W 271°WNW 284°WNW 284°WNW 288°WNW 284°

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