Daily means from the Porthleven wave buoy for Jan 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
1,487 wave-buoy observations covered all 31 days. Typical wave height was 5.7 ft (10th–90th percentile 1.8–11.7 ft), while mean average of more than one wave period type was 11.2 seconds (10th–90th percentile 9.2–13.3 seconds). Typical wind was 0 mph and mean water temperature was 10.4°C (10th–90th percentile 9.8–10.9°C). 18 of 6,656 checked values (0.3%) were excluded by quality control. Across 10 comparable years, mean wave height was above the same-month mean of 5.7 ft and mean wave period was above the same-month mean of 10.1 seconds.
Generating summary…
Generated only from the observations and comparisons shown on this page.
Typical Significant Wave Height
5.7ft
Mean: 6.2ft
P10–P90: 1.8 — 11.7ft
Recorded extremes
1 — 15.1ft
Mean Observed Wave Period
11.2secs
P10–P90: 9.2 — 13.3secs
Recorded extremes
4.2 — 18.2secs
Available for 743 of 744 hourly samples
Observed Wave Direction
SW
Circular concentration: 99%
Mean Water Temperature
10.4°C
P10–P90: 9.8 — 10.9°C
Recorded extremes
9.1 — 11.2°C
Compared With Previous Januarys
Historical baseline from 7,223 observations across 10 years.
Wave Height
6.2ft
0.5ft above mean
Historical mean 5.7ft
Wave Period
11.2s
1.1s above mean
Historical mean 10.1s
Water Temperature
10.4°C
0.1°C above mean
Historical mean 10.3°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 Sun, Jan 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 Jan 2023Last observation shown