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 2021
| Month | Hs (m) | Tp (s) | Tz (s) | Dirp (degrees) | TSea (degrees C) |
|---|---|---|---|---|---|
| January | 1.46 | 10.4 | 5.8 | 232 | 9.6 |
| February | 2.05 | 12.9 | 6.7 | 231 | 9.3 |
| March | 1.31 | 11.5 | 6.2 | 237 | 9.7 |
| April | 0.47 | 11.4 | 4.6 | 221 | 10.3 |
| May | 1.42 | 9.6 | 5.4 | 235 | 11.7 |
| June | 0.6 | 9.8 | 5.1 | 238 | 14.4 |
| July | 0.75 | 8.8 | 4.8 | 228 | 16.2 |
| August | 0.74 | 9 | 4.7 | 231 | 15.8 |
| September | 0.74 | 10.3 | 5.3 | 230 | 17 |
| October | 1.39 | 9.7 | 5.7 | 234 | 15 |
| November | 0.88 | 10.8 | 5.4 | 235 | 13.3 |
| December | 1.76 | 11.3 | 5.6 | 236 | 11.5 |
