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 2023
| Month | Hs (m) | Tp (s) | Tz (s) | Dirp (degrees) | TSea (degrees C) |
|---|---|---|---|---|---|
| January | 1.9 | 11.2 | 6.2 | 236 | 10.4 |
| February | 1 | 12.4 | 5.9 | 239 | 10 |
| March | 2.11 | 11.9 | 6.8 | 232 | 10 |
| April | 1.2 | 10.6 | 5.6 | 233 | 11.1 |
| May | 0.64 | 10.4 | 5.3 | 235 | 12.8 |
| June | 0.62 | 9.1 | 4.7 | 215 | 16.1 |
| July | 1.18 | 7.5 | 4.7 | 235 | 15.4 |
| August | 0.98 | 9.4 | 4.9 | 229 | 15.7 |
| September | 1.17 | 10.3 | 5.5 | 234 | 17.2 |
| October | 1.49 | 9.6 | 5.5 | 230 | 15.6 |
| November | 1.87 | 10.6 | 5.8 | 233 | 13.2 |
| December | 2.05 | 10.1 | 5.6 | 234 | 11.7 |
