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 2025
| Month | Hs (m) | Tp (s) | Tz (s) | Dirp (degrees) | TSea (degrees C) |
|---|---|---|---|---|---|
| January | 1.88 | 9.6 | 5.7 | 206 | 11.3 |
| February | 1.87 | 8.3 | 5.4 | 186 | 10.7 |
| March | 1.17 | 8.7 | 5 | 201 | 10.9 |
| April | 1.22 | 7.5 | 4.8 | 182 | 11.6 |
| May | 0.77 | 6.9 | 4.3 | 186 | 13.4 |
| June | 0.95 | 7.3 | 4.7 | 247 | 14 |
| July | - | - | - | - | - |
| August | - | - | - | - | - |
| September | - | - | - | - | - |
| October | - | - | - | - | - |
| November | - | - | - | - | - |
| December | - | - | - | - | - |
