National Network of Regional Coastal Monitoring Programmes
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Note that these are real-time data and are not quality-controlled.
St Mary's Sound
Latest Waves Data
| Time (GMT) | Latitude | Longitude | Wave Height (m) | Max Wave Height (m) | Tpeak (s) | Tz (s) | Peak Direction (degrees) | Spread (degrees) | Sea Temp (°C) | Energy Period (s) | Wave Power (kW/m) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 11-05-2026 04:00 | 49.89192 | -6.31401 | 0.91 | 1.39 | 7.7 | 5.2 | 100 | 28 | 12.7 | 6.4 | 2.59 |
| Date | Highest Hs 2026 | Storm Alert Threshold (0.25 yr Return Period Hs) |
Swell Alert Threshold (0.25 yr Return Period Te) |
|---|---|---|---|
| 23-01 | 6.4m | 4.43m | 10.90s |
| Time (GMT) | Latitude | Longitude | Wave Height (m) | Max Wave Height (m) | Tpeak (s) | Tz (s) | Peak Direction (degrees) | Spread (degrees) | Sea Temp (°C) | Energy Period (s) | Wave Power (kW/m) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 20-04-2026 00:00 | 49.89227 | -6.31398 | 0.64 | 0.95 | 4.6 | 3.4 | 134 | 40 | 11.3 | 4.6 | 0.92 |
| 19-04-2026 23:30 | 49.89227 | -6.31405 | 0.61 | 1 | 4.4 | 3.6 | 151 | 39 | 11.3 | 4.9 | 0.89 |
| 19-04-2026 23:00 | 49.89212 | -6.31407 | 0.61 | 0.82 | 11.1 | 3.8 | 259 | 54 | 11.3 | 5.4 | 0.99 |
| 19-04-2026 22:30 | 49.89209 | -6.31405 | 0.61 | 0.86 | 10 | 3.9 | 231 | 53 | 11.3 | 6 | 1.09 |
| 19-04-2026 22:00 | 49.89198 | -6.31403 | 0.62 | 0.92 | 9.1 | 4.3 | 235 | 45 | 11.3 | 6.7 | 1.26 |
| 19-04-2026 21:30 | 49.89180 | -6.31401 | 0.65 | 0.9 | 8.3 | 5.1 | 226 | 47 | 11.3 | 7.3 | 1.52 |
| 19-04-2026 21:00 | 49.89166 | -6.31392 | 0.58 | 0.88 | 9.1 | 4.8 | 257 | 59 | 11.3 | 7 | 1.15 |
| 19-04-2026 20:30 | 49.89160 | -6.31362 | 0.6 | 0.83 | 10.5 | 4.9 | 233 | 55 | 11.4 | 7 | 1.23 |
| 19-04-2026 20:00 | 49.89156 | -6.31390 | 0.66 | 0.91 | 10 | 5.1 | 221 | 68 | 11.4 | 6.9 | 1.48 |
| 19-04-2026 19:30 | 49.89129 | -6.31341 | 0.7 | 1.03 | 10.5 | 4.8 | 187 | 63 | 11.4 | 6.6 | 1.59 |
| 19-04-2026 19:00 | 49.89130 | -6.31240 | 0.74 | 1.11 | 10 | 4.3 | 218 | 66 | 11.4 | 5.9 | 1.59 |
| 19-04-2026 18:30 | 49.89139 | -6.31220 | 0.73 | 1.45 | 4 | 4 | 121 | 32 | 11.4 | 5.3 | 1.38 |
| 19-04-2026 18:00 | 49.89151 | -6.31190 | 0.68 | 1.3 | 4 | 4 | 120 | 40 | 11.4 | 5.3 | 1.21 |
| 19-04-2026 17:30 | 49.89228 | -6.31177 | 0.72 | 1.11 | 4.2 | 4.2 | 117 | 35 | 11.4 | 5.8 | 1.46 |
| 19-04-2026 17:00 | 49.89279 | -6.31154 | 0.72 | 1.05 | 8.3 | 4.2 | 331 | 38 | 11.3 | 5.9 | 1.49 |
| 19-04-2026 16:30 | 49.89286 | -6.31147 | 0.74 | 1.09 | 8.3 | 4.2 | 319 | 45 | 11.3 | 5.9 | 1.59 |
| 19-04-2026 16:00 | 49.89284 | -6.31145 | 0.71 | 1.11 | 10.5 | 4 | 301 | 67 | 11.3 | 5.8 | 1.43 |
| 19-04-2026 15:30 | 49.89283 | -6.31143 | 0.66 | 0.96 | 10 | 3.8 | 326 | 77 | 11.4 | 5.8 | 1.24 |
| 19-04-2026 15:00 | 49.89290 | -6.31154 | 0.64 | 0.95 | 9.1 | 3.8 | 316 | 58 | 11.4 | 5.7 | 1.16 |
| 19-04-2026 14:30 | 49.89297 | -6.31167 | 0.6 | 0.8 | 10.5 | 3.7 | 250 | 61 | 11.4 | 5.7 | 1 |
| 19-04-2026 14:00 | 49.89303 | -6.31188 | 0.57 | 0.82 | 15.4 | 3.4 | 193 | 37 | 11.4 | 5.4 | 0.86 |
| 19-04-2026 13:30 | 49.89309 | -6.31222 | 0.52 | 0.7 | 10 | 3.5 | 211 | 73 | 11.5 | 5.4 | 0.72 |
| 19-04-2026 13:00 | 49.89312 | -6.31295 | 0.48 | 0.81 | 9.1 | 3.6 | 179 | 71 | 11.4 | 5.9 | 0.66 |
| 19-04-2026 12:30 | 49.89262 | -6.31394 | 0.49 | 0.71 | 10.5 | 4.1 | 340 | 60 | 11.5 | 6.7 | 0.79 |
| 19-04-2026 12:00 | 49.89230 | -6.31405 | 0.45 | 0.75 | 9.1 | 4.5 | 160 | 72 | 11.5 | 6.8 | 0.68 |
| 19-04-2026 11:30 | 49.89215 | -6.31405 | 0.51 | 0.79 | 10 | 5 | 256 | 70 | 11.5 | 7.1 | 0.91 |
| 19-04-2026 11:00 | 49.89211 | -6.31403 | 0.51 | 0.76 | 8.3 | 5.4 | 253 | 68 | 11.5 | 7.7 | 0.98 |
| 19-04-2026 10:30 | 49.89210 | -6.31405 | 0.58 | 0.92 | 10 | 5.8 | 231 | 61 | 11.3 | 7.9 | 1.3 |
| 19-04-2026 10:00 | 49.89197 | -6.31403 | 0.66 | 0.95 | 11.1 | 6.3 | 238 | 43 | 11.4 | 8.3 | 1.78 |
| 19-04-2026 09:30 | 49.89187 | -6.31401 | 0.82 | 1.34 | 10 | 7 | 239 | 48 | 11.4 | 8.7 | 2.88 |
| 19-04-2026 09:00 | 49.89179 | -6.31401 | 0.88 | 1.23 | 10.5 | 7 | 215 | 39 | 11.3 | 8.5 | 3.22 |
| 19-04-2026 08:30 | 49.89160 | -6.31381 | 0.7 | 1.18 | 10 | 6.8 | 245 | 56 | 11.3 | 8.6 | 2.06 |
| 19-04-2026 08:00 | 49.89178 | -6.31379 | 0.75 | 1.1 | 9.1 | 7 | 246 | 56 | 11.3 | 8.6 | 2.36 |
| 19-04-2026 07:30 | 49.89144 | -6.31388 | 0.83 | 1.14 | 10.5 | 7.1 | 252 | 46 | 11.3 | 8.6 | 2.9 |
| 19-04-2026 07:00 | 49.89133 | -6.31285 | 0.8 | 1.22 | 9.1 | 6.7 | 238 | 56 | 11.3 | 8.3 | 2.62 |
| 19-04-2026 06:30 | 49.89129 | -6.31242 | 0.71 | 0.98 | 11.1 | 6.3 | 201 | 68 | 11.2 | 8.1 | 2 |
| 19-04-2026 06:00 | 49.89139 | -6.31250 | 0.67 | 1.17 | 10 | 6.3 | 288 | 68 | 11.2 | 8.1 | 1.79 |
| 19-04-2026 05:30 | 49.89184 | -6.31147 | 0.66 | 1.02 | 10 | 5.9 | 297 | 70 | 11.3 | 7.9 | 1.69 |
| 19-04-2026 05:00 | 49.89278 | -6.31154 | 0.78 | 1.19 | 10 | 6.2 | 323 | 54 | 11.3 | 7.8 | 2.34 |
| 19-04-2026 04:30 | 49.89290 | -6.31154 | 0.76 | 1.28 | 9.1 | 6 | 314 | 55 | 11.3 | 7.5 | 2.14 |
| 19-04-2026 04:00 | 49.89278 | -6.31150 | 0.67 | 1.04 | 10.5 | 5.8 | 256 | 70 | 11.2 | 7.5 | 1.66 |
| 19-04-2026 03:30 | 49.89284 | -6.31147 | 0.69 | 1.01 | 8.3 | 6.1 | 302 | 59 | 11.2 | 7.6 | 1.78 |
| 19-04-2026 03:00 | 49.89289 | -6.31143 | 0.65 | 1.09 | 9.1 | 5.9 | 315 | 57 | 11.2 | 7.6 | 1.58 |
| 19-04-2026 02:30 | 49.89292 | -6.31145 | 0.66 | 0.89 | 10 | 5.9 | 319 | 50 | 11.3 | 7.9 | 1.68 |
| 19-04-2026 02:00 | 49.89294 | -6.31154 | 0.6 | 0.79 | 10 | 5.3 | 297 | 66 | 11.3 | 7.3 | 1.28 |
| 19-04-2026 01:30 | 49.89297 | -6.31175 | 0.61 | 0.9 | 9.1 | 5.1 | 203 | 67 | 11.3 | 6.9 | 1.26 |
| 19-04-2026 01:00 | 49.89305 | -6.31205 | 0.6 | 0.87 | 10 | 5 | 229 | 68 | 11.3 | 6.8 | 1.21 |
| 19-04-2026 00:30 | 49.89298 | -6.31304 | 0.57 | 0.81 | 10 | 5.1 | 302 | 65 | 11.3 | 6.8 | 1.08 |
| 19-04-2026 00:00 | 49.89247 | -6.31381 | 0.6 | 0.99 | 10.5 | 5.3 | 321 | 57 | 11.3 | 7.2 | 1.26 |
