National Network of Regional Coastal Monitoring Programmes
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Wave Spectra for 20/05/2025 20:00 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.
Swanage Pier
Tide Levels and Harmonics Wave Spectra for 20/05/2025 20:00 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 (20/05/2025 20:00 GMT) | |
|---|---|
| Significant Wave Height (m) | 0.09 |
| Wave zero up crossing period (Spectrum Tz) (s) | 4.3 |
| Wind Wave Significant Wave Height (m) | 0.04 |
| Wind Wave Peak Period (s) | 3.7 |
| Wind Wave Peak Period Direction (°) | 0 |
| Swell Significant Wave Height (m) | 0.01 |
| Swell Peak Period (s) | 21.3 |
| Swell Peak Period Direction (°) | 0 |
| % Swell | 10.2 |
Wave Spectra for date 20/05/2025 20:00:
| Frequency (Hz) | Period (s) | Normalised Energy | Energy |
|---|---|---|---|
| 0.0313 | 31.9 | 0.131 | 0 |
| 0.0391 | 25.6 | 0.174 | 0 |
| 0.0469 | 21.3 | 0.311 | 0 |
| 0.0547 | 18.3 | 0.259 | 0 |
| 0.0625 | 16 | 0.263 | 0 |
| 0.0703 | 14.2 | 0.276 | 0 |
| 0.0781 | 12.8 | 0.286 | 0 |
| 0.0859 | 11.6 | 0.295 | 0 |
| 0.0937 | 10.7 | 0.303 | 0 |
| 0.1016 | 9.8 | 0.303 | 0 |
| 0.1094 | 9.1 | 0.297 | 0 |
| 0.1172 | 8.5 | 0.282 | 0 |
| 0.1250 | 8 | 0.264 | 0 |
| 0.1328 | 7.5 | 0.268 | 0 |
| 0.1406 | 7.1 | 0.27 | 0 |
| 0.1484 | 6.7 | 0.282 | 0 |
| 0.1563 | 6.4 | 0.305 | 0 |
| 0.1641 | 6.1 | 0.32 | 0 |
| 0.1719 | 5.8 | 0.34 | 0 |
| 0.1797 | 5.6 | 0.376 | 0 |
| 0.1875 | 5.3 | 0.419 | 0 |
| 0.1953 | 5.1 | 0.486 | 0 |
| 0.2031 | 4.9 | 0.535 | 0 |
| 0.2109 | 4.7 | 0.598 | 0 |
| 0.2188 | 4.6 | 0.67 | 0 |
| 0.2266 | 4.4 | 0.763 | 0 |
| 0.2344 | 4.3 | 0.82 | 0 |
| 0.2422 | 4.1 | 0.863 | 0 |
| 0.2500 | 4 | 0.903 | 0 |
| 0.2578 | 3.9 | 0.948 | 0 |
| 0.2656 | 3.8 | 0.981 | 0.001 |
| 0.2734 | 3.7 | 1 | 0.001 |
| 0.2812 | 3.6 | 0.994 | 0.001 |
| 0.2891 | 3.5 | 0.994 | 0.001 |
| 0.2969 | 3.4 | 0.958 | 0 |
| 0.3047 | 3.3 | 0.907 | 0 |
| 0.3125 | 3.2 | 0.842 | 0 |
| 0.3203 | 3.1 | 0.784 | 0 |
| 0.3281 | 3 | 0.737 | 0 |
| 0.3359 | 3 | 0.683 | 0 |
| 0.3437 | 2.9 | 0.625 | 0 |
| 0.3516 | 2.8 | 0.552 | 0 |
| 0.3594 | 2.8 | 0.49 | 0 |
| 0.3672 | 2.7 | 0.427 | 0 |
| 0.3750 | 2.7 | 0.378 | 0 |
| 0.3828 | 2.6 | 0.355 | 0 |
| 0.3906 | 2.6 | 0.328 | 0 |
| 0.3984 | 2.5 | 0.286 | 0 |
| 0.4063 | 2.5 | 0.268 | 0 |
| 0.4141 | 2.4 | 0.243 | 0 |
| 0.4219 | 2.4 | 0.236 | 0 |
| 0.4297 | 2.3 | 0.214 | 0 |
| 0.4375 | 2.3 | 0.207 | 0 |
| 0.4453 | 2.2 | 0.199 | 0 |
| 0.4531 | 2.2 | 0.189 | 0 |
| 0.4609 | 2.2 | 0.172 | 0 |
| 0.4688 | 2.1 | 0.16 | 0 |
| 0.4766 | 2.1 | 0.156 | 0 |
| 0.4844 | 2.1 | 0.153 | 0 |
| 0.4922 | 2 | 0.133 | 0 |
| 0.5000 | 2 | 0.124 | 0 |
| 0.5078 | 2 | 0.11 | 0 |
| 0.5156 | 1.9 | 0.108 | 0 |
| 0.5235 | 1.9 | 0.1 | 0 |
| 0.5312 | 1.9 | 0.095 | 0 |
| 0.5391 | 1.9 | 0.095 | 0 |
| 0.5469 | 1.8 | 0.097 | 0 |
| 0.5547 | 1.8 | 0.091 | 0 |
| 0.5625 | 1.8 | 0.089 | 0 |
| 0.5703 | 1.8 | 0.093 | 0 |
| 0.5781 | 1.7 | 0.098 | 0 |
| 0.5859 | 1.7 | 0.097 | 0 |
| 0.5938 | 1.7 | 0.097 | 0 |
| 0.6016 | 1.7 | 0.095 | 0 |
| 0.6094 | 1.6 | 0.097 | 0 |
| 0.6172 | 1.6 | 0.095 | 0 |
| 0.6250 | 1.6 | 0.089 | 0 |
| 0.6328 | 1.6 | 0.087 | 0 |
| 0.6406 | 1.6 | 0.087 | 0 |
| 0.6484 | 1.5 | 0.081 | 0 |
| 0.6563 | 1.5 | 0.071 | 0 |
| 0.6641 | 1.5 | 0.068 | 0 |
| 0.6719 | 1.5 | 0.066 | 0 |
| 0.6797 | 1.5 | 0.066 | 0 |
| 0.6875 | 1.5 | 0.066 | 0 |
| 0.6953 | 1.4 | 0.064 | 0 |
| 0.7031 | 1.4 | 0.062 | 0 |
| 0.7109 | 1.4 | 0.064 | 0 |
| 0.7188 | 1.4 | 0.062 | 0 |
| 0.7266 | 1.4 | 0.056 | 0 |
| 0.7344 | 1.4 | 0.058 | 0 |
| 0.7422 | 1.3 | 0.058 | 0 |
| 0.7500 | 1.3 | 0.058 | 0 |
| 0.7578 | 1.3 | 0.056 | 0 |
| 0.7656 | 1.3 | 0.054 | 0 |
| 0.7735 | 1.3 | 0.054 | 0 |
| 0.7813 | 1.3 | 0.056 | 0 |
| 0.7891 | 1.3 | 0.052 | 0 |
| 0.7969 | 1.3 | 0.05 | 0 |
| 0.8047 | 1.2 | 0.05 | 0 |
| 0.8125 | 1.2 | 0.048 | 0 |
| 0.8203 | 1.2 | 0.048 | 0 |
| 0.8282 | 1.2 | 0.048 | 0 |
| 0.8359 | 1.2 | 0.052 | 0 |
| 0.8437 | 1.2 | 0.052 | 0 |
| 0.8516 | 1.2 | 0.052 | 0 |
| 0.8594 | 1.2 | 0.052 | 0 |
| 0.8672 | 1.2 | 0.052 | 0 |
| 0.8750 | 1.1 | 0.052 | 0 |
| 0.8828 | 1.1 | 0.054 | 0 |
| 0.8906 | 1.1 | 0.052 | 0 |
| 0.8985 | 1.1 | 0.05 | 0 |
| 0.9063 | 1.1 | 0.052 | 0 |
