National Network of Regional Coastal Monitoring Programmes
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Note that these are real-time data and are not quality-controlled. Long-range graphs are plotted from a randomised subsample of half-hourly data.
Porthleven
Average values for 2026
| Month | Hs (m) | Tp (s) | Tz (s) | Dirp (degrees) | TSea (degrees C) |
|---|---|---|---|---|---|
| January | 2.09 | 11.5 | 6.1 | 229 | 10.1 |
| February | 2.19 | 12.3 | 6.3 | 231 | 10.2 |
| March | 1.38 | 11.3 | 5.7 | 237 | 10.7 |
| April | 1.24 | 10.6 | 5.4 | 230 | 11.8 |
| May | 0.44 | 10.6 | 4.4 | 230 | 12.7 |
| June | - | - | - | - | - |
| July | - | - | - | - | - |
| August | - | - | - | - | - |
| September | - | - | - | - | - |
| October | - | - | - | - | - |
| November | - | - | - | - | - |
| December | - | - | - | - | - |
