National Network of Regional Coastal Monitoring Programmes
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Wave Spectra for 31/03/2025 22:30(i) GMT
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
Wave Spectra for 31/03/2025 22:30(i) GMT
Wave Spectra page developed in conjunction with Fugro GB Limited.
Wave Spectra page developed in conjunction with Fugro GB Limited.
| Sea and Swell Summary for (31/03/2025 22:30(i) GMT) | |
|---|---|
| Significant Wave Height (m) | 1.41 |
| Wave zero up crossing period (Spectrum Tz) (s) | 4.1 |
| Wind Wave Significant Wave Height (m) | 1.34 |
| Wind Wave Peak Period (s) | 5.3 |
| Wind Wave Peak Period Direction (°) | 125 |
| Swell Significant Wave Height (m) | 0.43 |
| Swell Peak Period (s) | 11.1 |
| Swell Peak Period Direction (°) | 248.9 |
| % Swell | 9.5 |
Wave Spectra for date 31/03/2025 22:30(i):
| Frequency (Hz) | Period (s) | Normalised Energy | Energy |
|---|---|---|---|
| 0.05 | 20 | 0.007 | 0.011 |
| 0.07 | 14.3 | 0.057 | 0.088 |
| 0.09 | 11.1 | 0.215 | 0.332 |
| 0.11 | 9.1 | 0.076 | 0.117 |
| 0.13 | 7.7 | 0.047 | 0.073 |
| 0.14 | 7.1 | 0.043 | 0.067 |
| 0.15 | 6.7 | 0.085 | 0.131 |
| 0.16 | 6.3 | 0.219 | 0.339 |
| 0.17 | 5.9 | 0.511 | 0.791 |
| 0.175 | 5.7 | 0.631 | 0.976 |
| 0.18 | 5.6 | 0.631 | 0.976 |
| 0.185 | 5.4 | 0.73 | 1.131 |
| 0.19 | 5.3 | 1 | 1.548 |
| 0.195 | 5.1 | 0.715 | 1.107 |
| 0.2 | 5 | 0.644 | 0.997 |
| 0.205 | 4.9 | 0.778 | 1.204 |
| 0.21 | 4.8 | 0.47 | 0.727 |
| 0.22 | 4.5 | 0.321 | 0.497 |
| 0.23 | 4.3 | 0.342 | 0.53 |
| 0.24 | 4.2 | 0.277 | 0.429 |
| 0.25 | 4 | 0.229 | 0.354 |
| 0.27 | 3.7 | 0.215 | 0.332 |
| 0.29 | 3.4 | 0.128 | 0.199 |
| 0.31 | 3.2 | 0.108 | 0.167 |
| 0.33 | 3 | 0.089 | 0.137 |
| 0.41 | 2.4 | 0.042 | 0.065 |
| 0.49 | 2 | 0.027 | 0.042 |
