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.
St Mary's Sound
Average values for 2020
| Month | Hs (m) | Tp (s) | Tz (s) | Dirp (degrees) | TSea (degrees C) |
|---|---|---|---|---|---|
| January | 1.8 | 9.3 | 5.5 | 215 | 10.6 |
| February | 2.19 | 9.7 | 5.8 | 228 | 10.2 |
| March | 1.61 | 9.4 | 5.3 | 197 | 9.8 |
| April | 0.96 | 9.2 | 5 | 198 | 10.4 |
| May | 0.95 | 8.4 | 4.6 | 201 | 11.9 |
| June | 0.84 | 7.4 | 4.5 | 209 | 13.3 |
| July | 0.73 | 7.6 | 4.3 | 241 | 14.5 |
| August | 0.95 | 7.5 | 4.7 | 231 | 15.6 |
| September | 0.81 | 8.7 | 4.6 | 251 | 15.2 |
| October | 1.49 | 7.9 | 5 | 212 | 13.7 |
| November | 1.56 | 8.6 | 5.1 | 212 | 12.6 |
| December | 1.65 | 8.9 | 5.2 | 217 | 11.5 |
