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 2017
| Month | Hs (m) | Tp (s) | Tz (s) | Dirp (degrees) | TSea (degrees C) |
|---|---|---|---|---|---|
| January | 1.19 | 10.5 | 5.5 | 235 | 10.3 |
| February | 1.84 | 11.4 | 6 | 233 | 10.1 |
| March | 1.55 | 10.4 | 5.7 | 235 | 10.3 |
| April | 0.61 | 10.8 | 5.2 | 232 | 11.2 |
| May | 0.92 | 9.9 | 5.3 | 231 | 13.5 |
| June | 1.05 | 9.3 | 5.2 | 241 | 14.5 |
| July | 0.82 | 8.2 | 4.6 | 236 | 15.5 |
| August | 0.84 | 7.9 | 4.7 | 239 | 15.6 |
| September | 1.28 | 9.2 | 5.2 | 237 | 15.3 |
| October | 0.91 | 9.5 | 5.1 | 238 | 14.6 |
| November | 1.05 | 9.6 | 4.9 | 238 | 13.1 |
| December | 1.29 | 10.1 | 5.1 | 234 | 11.3 |
