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) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 17-03-2026 04:30 | 49.89167 | -6.31341 | 2.22 | 3.07 | 6.3 | 5.3 | 193 | 39 | 11 | 6.9 | 16.73 |
| 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 12-09-2025 00:00 | 49.89280 | -6.31321 | 1.28 | 1.84 | 10 | 5.6 | 249 | 60 | 14.8 | 7.2 | 5.77 |
| 11-09-2025 23:30 | 49.89222 | -6.31398 | 1.45 | 2.06 | 11.1 | 5.7 | 309 | 72 | 14.9 | 7.4 | 7.6 |
| 11-09-2025 23:00 | 49.89190 | -6.31396 | 1.68 | 2.35 | 7.1 | 6.1 | 231 | 36 | 14.9 | 7.4 | 10.3 |
| 11-09-2025 22:30 | 49.89177 | -6.31394 | 1.73 | 2.6 | 7.1 | 5.9 | 226 | 37 | 14.9 | 7.2 | 10.61 |
| 11-09-2025 22:00 | 49.89167 | -6.31377 | 1.46 | 2.31 | 8.3 | 5.7 | 242 | 52 | 14.9 | 7.5 | 7.79 |
| 11-09-2025 21:30 | 49.89189 | -6.31394 | 1.63 | 2.68 | 8.3 | 5.6 | 266 | 50 | 14.8 | 7.3 | 9.57 |
| 11-09-2025 21:00 | 49.89142 | -6.31356 | 1.88 | 2.73 | 11.1 | 6 | 315 | 52 | 14.8 | 7.6 | 13.25 |
| 11-09-2025 20:30 | 49.89158 | -6.31345 | 1.78 | 2.44 | 8.3 | 5.5 | 250 | 45 | 14.8 | 7.3 | 11.38 |
| 11-09-2025 20:00 | 49.89136 | -6.31257 | 1.62 | 2.44 | 11.1 | 5.6 | 274 | 58 | 14.8 | 7.4 | 9.57 |
| 11-09-2025 19:30 | 49.89146 | -6.31216 | 1.4 | 2.48 | 9.1 | 5 | 294 | 58 | 14.8 | 7 | 6.74 |
| 11-09-2025 19:00 | 49.89241 | -6.31137 | 1.4 | 2.11 | 11.1 | 5.3 | 342 | 52 | 14.8 | 7.5 | 7.24 |
| 11-09-2025 18:30 | 49.89261 | -6.31143 | 1.5 | 2.04 | 8.3 | 5 | 301 | 58 | 14.8 | 6.9 | 7.58 |
| 11-09-2025 18:00 | 49.89270 | -6.31143 | 1.55 | 2.16 | 7.7 | 5 | 300 | 52 | 14.8 | 6.7 | 7.94 |
| 11-09-2025 17:30 | 49.89277 | -6.31143 | 1.5 | 2.74 | 8.3 | 5.1 | 314 | 57 | 14.8 | 6.8 | 7.56 |
| 11-09-2025 17:00 | 49.89278 | -6.31141 | 1.48 | 2.34 | 8.3 | 4.9 | 288 | 50 | 14.8 | 6.6 | 7.06 |
| 11-09-2025 16:30 | 49.89278 | -6.31141 | 1.39 | 2.12 | 8.3 | 4.9 | 286 | 53 | 14.8 | 6.4 | 6.11 |
| 11-09-2025 16:00 | 49.89276 | -6.31141 | 1.38 | 2.01 | 8.3 | 4.9 | 276 | 59 | 14.8 | 6.5 | 6.1 |
| 11-09-2025 15:30 | 49.89279 | -6.31145 | 1.3 | 1.87 | 7.7 | 4.8 | 257 | 57 | 14.8 | 6.5 | 5.41 |
| 11-09-2025 15:00 | 49.89281 | -6.31150 | 1.15 | 1.73 | 7.7 | 4.6 | 236 | 57 | 14.8 | 6.4 | 4.16 |
| 11-09-2025 14:30 | 49.89290 | -6.31162 | 1.13 | 1.66 | 7.1 | 4.3 | 224 | 51 | 14.9 | 6 | 3.76 |
| 11-09-2025 14:00 | 49.89290 | -6.31167 | 1.06 | 1.56 | 7.7 | 4.4 | 204 | 52 | 14.9 | 6.3 | 3.45 |
| 11-09-2025 13:30 | 49.89301 | -6.31190 | 1.03 | 1.6 | 7.7 | 4.7 | 222 | 47 | 14.9 | 6.5 | 3.36 |
| 11-09-2025 13:00 | 49.89281 | -6.31268 | 0.98 | 1.48 | 7.7 | 4.7 | 201 | 46 | 14.9 | 6.4 | 3.01 |
| 11-09-2025 12:30 | 49.89238 | -6.31338 | 1.09 | 1.5 | 8.3 | 4.8 | 225 | 52 | 15 | 6.6 | 3.86 |
| 11-09-2025 12:00 | 49.89225 | -6.31362 | 1.13 | 1.65 | 11.1 | 5.2 | 281 | 58 | 15 | 7.3 | 4.55 |
| 11-09-2025 11:30 | 49.89218 | -6.31383 | 1.31 | 1.8 | 8.3 | 5.6 | 231 | 46 | 14.9 | 7.2 | 6.09 |
| 11-09-2025 11:00 | 49.89206 | -6.31392 | 1.52 | 2.85 | 8.3 | 6 | 239 | 41 | 14.9 | 7.6 | 8.63 |
| 11-09-2025 10:30 | 49.89190 | -6.31396 | 1.66 | 2.53 | 7.7 | 6.1 | 231 | 45 | 14.9 | 7.5 | 10.08 |
| 11-09-2025 10:00 | 49.89179 | -6.31390 | 1.6 | 2.68 | 7.1 | 5.9 | 229 | 39 | 14.9 | 7.3 | 9.13 |
| 11-09-2025 09:30 | 49.89178 | -6.31386 | 1.54 | 2.43 | 11.8 | 5.8 | 311 | 38 | 14.9 | 7.7 | 8.94 |
| 11-09-2025 09:00 | 49.89181 | -6.31390 | 1.85 | 3.45 | 8.3 | 6 | 242 | 45 | 14.8 | 7.5 | 12.59 |
| 11-09-2025 08:30 | 49.89141 | -6.31310 | 2.07 | 3.07 | 7.7 | 6.1 | 235 | 38 | 14.8 | 7.7 | 16.09 |
| 11-09-2025 08:00 | 49.89146 | -6.31302 | 1.88 | 2.85 | 11.1 | 5.8 | 266 | 36 | 14.8 | 7.7 | 13.32 |
| 11-09-2025 07:30 | 49.89141 | -6.31246 | 1.45 | 2.17 | 11.1 | 5.1 | 301 | 56 | 14.8 | 7 | 7.2 |
| 11-09-2025 07:00 | 49.89168 | -6.31180 | 1.51 | 2.48 | 10 | 5.2 | 321 | 49 | 14.8 | 7.3 | 8.15 |
| 11-09-2025 06:30 | 49.89256 | -6.31141 | 1.44 | 2.15 | 8.3 | 5 | 288 | 59 | 14.9 | 7.1 | 7.2 |
| 11-09-2025 06:00 | 49.89272 | -6.31145 | 1.52 | 2.02 | 7.7 | 5.1 | 312 | 46 | 14.9 | 7 | 7.95 |
| 11-09-2025 05:30 | 49.89276 | -6.31152 | 1.54 | 2.3 | 7.7 | 4.8 | 291 | 52 | 14.9 | 6.4 | 7.47 |
| 11-09-2025 05:00 | 49.89284 | -6.31154 | 1.53 | 2.23 | 8.3 | 4.9 | 291 | 56 | 15.2 | 6.5 | 7.42 |
| 11-09-2025 04:30 | 49.89281 | -6.31141 | 1.4 | 2.24 | 6.7 | 4.7 | 298 | 59 | 14.9 | 6.3 | 6.04 |
| 11-09-2025 04:00 | 49.89280 | -6.31141 | 1.28 | 2.06 | 6.7 | 4.8 | 295 | 61 | 14.8 | 6.4 | 5.17 |
| 11-09-2025 03:30 | 49.89280 | -6.31145 | 1.18 | 2.19 | 6.7 | 4.7 | 260 | 62 | 14.8 | 6.3 | 4.29 |
| 11-09-2025 03:00 | 49.89283 | -6.31152 | 1.09 | 1.63 | 7.1 | 4.8 | 243 | 61 | 14.8 | 6.3 | 3.66 |
| 11-09-2025 02:30 | 49.89293 | -6.31167 | 1.08 | 1.74 | 7.7 | 4.6 | 219 | 60 | 14.8 | 6.2 | 3.55 |
| 11-09-2025 02:00 | 49.89295 | -6.31175 | 1.01 | 1.47 | 7.1 | 4.5 | 208 | 53 | 14.9 | 6 | 3.01 |
| 11-09-2025 01:30 | 49.89308 | -6.31216 | 0.96 | 1.52 | 7.1 | 4.7 | 205 | 49 | 14.8 | 6.2 | 2.8 |
| 11-09-2025 01:00 | 49.89286 | -6.31334 | 0.92 | 1.52 | 6.7 | 5 | 202 | 44 | 14.8 | 6.6 | 2.75 |
| 11-09-2025 00:30 | 49.89216 | -6.31386 | 0.91 | 1.39 | 7.1 | 5.1 | 193 | 49 | 14.9 | 7.1 | 2.89 |
| 11-09-2025 00:00 | 49.89192 | -6.31386 | 1.03 | 1.63 | 11.8 | 5.3 | 330 | 43 | 14.9 | 7.4 | 3.84 |
