Daily means from the Porthleven wave buoy for Dec 2023, including available wave height, period, direction, wind and sea temperature data.
Last observation shown
Data available: to
Monthly means for
Period Summary
Programmatically generated summary. Hog Says
1,495 wave-buoy observations covered all 31 days. Typical wave height was 6.1 ft (10th–90th percentile 3.2–11 ft), while mean average of more than one wave period type was 10.1 seconds (10th–90th percentile 6.4–13.8 seconds). Mean water temperature was 11.7°C (10th–90th percentile 11.5–11.9°C). 37 of 5,953 checked values (0.6%) were excluded by quality control. Across 11 comparable years, mean wave height was above the same-month mean of 6.2 ft and mean wave period was above the same-month mean of 9.6 seconds.
Generating summary…
Generated only from the observations and comparisons shown on this page.
Typical Significant Wave Height
6.1ft
Mean: 6.7ft
P10–P90: 3.2 — 11ft
Recorded extremes
0.8 — 18.2ft
Mean Observed Wave Period
10.1secs
P10–P90: 6.4 — 13.8secs
Recorded extremes
2.4 — 18.2secs
Available for 743 of 744 hourly samples
Observed Wave Direction
SW
Circular concentration: 98%
Mean Water Temperature
11.7°C
P10–P90: 11.5 — 11.9°C
Recorded extremes
10.6 — 12.3°C
Compared With Previous Decembers
Historical baseline from 7,976 observations across 11 years.
Wave Height
6.7ft
0.5ft above mean
Historical mean 6.2ft
Wave Period
10.1s
0.5s above mean
Historical mean 9.6s
Water Temperature
11.7°C
0.3°C above mean
Historical mean 11.4°C
Chart showing grouped wave observations for Porthleven. Use the table on this page for a text version of the same measurements. To open hourly observations, use a linked day name in the table.
Sorry, there is no wave data for Fri, Dec 1, 2023
About Porthleven wave buoy
Porthleven is a National Network Datawell Directional WaveRider off Cornwall's exposed south coast. First deployed in October 2011, it characterises waves approaching the Porthleven frontage from the western English Channel, where Atlantic swell can wrap around Land's End and meet locally generated seas.
Its current data source reports wave height, wave period, wave direction, directional spread, wave power and sea temperature.
Provider-reported wave power.Approximate wave power calculated from significant wave height and energy period.Approximate mean including provider-reported and calculated wave power.
Metrics are rows; days run left to right.
Porthleven wave buoy daily means Dec 2023Last observation shown