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) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 18-02-2026 20:30 | 49.89171 | -6.31368 | 1.92 | 2.81 | 11.8 | 6.3 | 263 | 55 | 11 | 8.8 | 15.9 |
| 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 11-09-2025 00:00 | 49.89192 | -6.31386 | 1.03 | 1.63 | 11.8 | 5.3 | 331 | 43 | 14.9 | 7.4 | 3.84 |
| 10-09-2025 23:30 | 49.89200 | -6.31381 | 1.15 | 1.76 | 10 | 5.2 | 232 | 59 | 14.9 | 7.2 | 4.66 |
| 10-09-2025 23:00 | 49.89208 | -6.31390 | 1.48 | 2.27 | 11.1 | 6.2 | 250 | 49 | 15 | 8 | 8.65 |
| 10-09-2025 22:30 | 49.89210 | -6.31401 | 1.59 | 2.21 | 9.1 | 6.3 | 232 | 34 | 15 | 7.8 | 9.65 |
| 10-09-2025 22:00 | 49.89190 | -6.31398 | 1.81 | 2.61 | 7.1 | 6.3 | 231 | 33 | 15 | 7.6 | 12.22 |
| 10-09-2025 21:30 | 49.89174 | -6.31386 | 1.51 | 2.36 | 9.1 | 5.9 | 241 | 46 | 14.9 | 7.3 | 8.19 |
| 10-09-2025 21:00 | 49.89161 | -6.31368 | 1.46 | 2.37 | 7.7 | 5.7 | 233 | 49 | 14.8 | 7.2 | 7.49 |
| 10-09-2025 20:30 | 49.89175 | -6.31386 | 1.82 | 3.1 | 8.3 | 6.1 | 236 | 50 | 14.8 | 7.4 | 12.04 |
| 10-09-2025 20:00 | 49.89129 | -6.31323 | 1.89 | 2.71 | 10 | 6.1 | 250 | 43 | 14.8 | 7.6 | 13.23 |
| 10-09-2025 19:30 | 49.89139 | -6.31287 | 1.66 | 2.31 | 9.1 | 5.6 | 243 | 48 | 14.8 | 7.2 | 9.67 |
| 10-09-2025 19:00 | 49.89137 | -6.31240 | 1.23 | 1.87 | 10 | 5.3 | 267 | 62 | 14.9 | 7 | 5.21 |
| 10-09-2025 18:30 | 49.89153 | -6.31182 | 1.27 | 1.99 | 8.3 | 4.9 | 287 | 60 | 15 | 6.8 | 5.38 |
| 10-09-2025 18:00 | 49.89215 | -6.31135 | 1.35 | 2.15 | 6.7 | 4.8 | 248 | 60 | 14.9 | 6.6 | 5.89 |
| 10-09-2025 17:30 | 49.89246 | -6.31141 | 1.33 | 2.07 | 7.7 | 4.9 | 294 | 62 | 15 | 6.7 | 5.83 |
| 10-09-2025 17:00 | 49.89277 | -6.31147 | 1.35 | 1.88 | 8.3 | 5 | 315 | 47 | 14.7 | 6.7 | 6 |
| 10-09-2025 16:30 | 49.89279 | -6.31150 | 1.36 | 2.01 | 9.1 | 5.1 | 315 | 42 | 14.8 | 6.7 | 6.11 |
| 10-09-2025 16:00 | 49.89278 | -6.31141 | 1.35 | 2.25 | 7.1 | 4.9 | 284 | 63 | 14.7 | 6.4 | 5.71 |
| 10-09-2025 15:30 | 49.89276 | -6.31143 | 1.27 | 2.17 | 6.7 | 4.8 | 245 | 61 | 14.7 | 6.3 | 4.95 |
| 10-09-2025 15:00 | 49.89276 | -6.31145 | 1.24 | 2 | 7.1 | 4.8 | 232 | 60 | 14.8 | 6.3 | 4.74 |
| 10-09-2025 14:30 | 49.89280 | -6.31150 | 1.22 | 1.99 | 7.1 | 4.8 | 211 | 57 | 14.9 | 6.2 | 4.54 |
| 10-09-2025 14:00 | 49.89277 | -6.31145 | 1.21 | 1.97 | 6.7 | 4.7 | 200 | 44 | 15 | 6 | 4.31 |
| 10-09-2025 13:30 | 49.89264 | -6.31137 | 1.21 | 1.96 | 7.7 | 4.8 | 201 | 42 | 15 | 6.1 | 4.41 |
| 10-09-2025 13:00 | 49.89192 | -6.31139 | 1.19 | 2.1 | 7.7 | 5 | 193 | 35 | 15.1 | 6.2 | 4.34 |
| 10-09-2025 12:30 | 49.89150 | -6.31207 | 1.23 | 1.83 | 7.1 | 5 | 193 | 33 | 15.1 | 6.2 | 4.6 |
| 10-09-2025 12:00 | 49.89165 | -6.31287 | 1.15 | 2.05 | 6.7 | 5.2 | 190 | 41 | 15.1 | 6.4 | 4.13 |
| 10-09-2025 11:30 | 49.89194 | -6.31362 | 1.15 | 1.77 | 7.7 | 5.4 | 204 | 37 | 15.1 | 6.6 | 4.28 |
| 10-09-2025 11:00 | 49.89202 | -6.31383 | 1.11 | 1.75 | 10.5 | 5.4 | 302 | 63 | 15.2 | 6.7 | 4.08 |
| 10-09-2025 10:30 | 49.89200 | -6.31394 | 1.3 | 1.99 | 7.1 | 5.6 | 210 | 28 | 15.2 | 7 | 5.78 |
| 10-09-2025 10:00 | 49.89196 | -6.31396 | 1.48 | 2.06 | 7.1 | 5.8 | 198 | 34 | 15.1 | 7 | 7.54 |
| 10-09-2025 09:30 | 49.89186 | -6.31396 | 1.43 | - | 7.1 | 5.7 | 207 | 36 | 15.1 | 7.2 | 7.17 |
| 10-09-2025 09:00 | 49.89174 | -6.31392 | 1.55 | 2.59 | 6.7 | 5.8 | 210 | 43 | 15.1 | 6.9 | 8.15 |
| 10-09-2025 08:00 | 49.89165 | -6.31390 | 1.5 | 2.29 | 7.1 | 5.7 | 197 | 38 | 15 | 6.9 | 7.66 |
| 10-09-2025 07:30 | 49.89143 | -6.31287 | 1.44 | 2.02 | 11.1 | 5.3 | 294 | 61 | 15 | 7 | 7.1 |
| 10-09-2025 07:00 | 49.89137 | -6.31244 | 1.37 | 2.1 | 10.5 | 5.4 | 319 | 42 | 15 | 7 | 6.42 |
| 10-09-2025 06:30 | 49.89195 | -6.31141 | 1.15 | 1.96 | 7.7 | 4.9 | 184 | 63 | 15 | 6.3 | 4.09 |
| 10-09-2025 06:00 | 49.89244 | -6.31143 | 1.23 | 1.97 | 7.7 | 4.9 | 210 | 67 | 15.1 | 6.3 | 4.71 |
| 10-09-2025 05:30 | 49.89266 | -6.31147 | 1.31 | 2.07 | 7.1 | 4.9 | 211 | 54 | 15 | 6.4 | 5.36 |
| 10-09-2025 05:00 | 49.89270 | -6.31145 | 1.35 | 1.91 | 7.1 | 4.9 | 229 | 58 | 14.9 | 6.3 | 5.6 |
| 10-09-2025 04:30 | 49.89278 | -6.31145 | 1.39 | 2.25 | 6.3 | 4.8 | 253 | 59 | 15 | 6.1 | 5.74 |
| 10-09-2025 04:00 | 49.89278 | -6.31143 | 1.38 | 2.18 | 6.7 | 4.9 | 191 | 53 | 15 | 6.1 | 5.68 |
| 10-09-2025 03:30 | 49.89280 | -6.31141 | 1.43 | 2.05 | 7.1 | 4.9 | 198 | 44 | 15.1 | 6.2 | 6.19 |
| 10-09-2025 03:00 | 49.89281 | -6.31150 | 1.45 | 2.17 | 7.1 | 5 | 212 | 50 | 15 | 6.2 | 6.35 |
| 10-09-2025 02:30 | 49.89284 | -6.31152 | 1.4 | 2.22 | 7.1 | 4.9 | 200 | 33 | 15.1 | 6 | 5.78 |
| 10-09-2025 02:00 | 49.89290 | -6.31165 | 1.32 | 2.06 | 7.1 | 4.8 | 197 | 41 | 15.1 | 5.9 | 5.06 |
| 10-09-2025 01:30 | 49.89305 | -6.31201 | 1.39 | 2 | 6.7 | 4.9 | 191 | 30 | 15.1 | 5.9 | 5.59 |
| 10-09-2025 01:00 | 49.89315 | -6.31272 | 1.43 | 2.19 | 6.7 | 5.1 | 188 | 29 | 15.1 | 6.2 | 6.24 |
| 10-09-2025 00:30 | 49.89264 | -6.31388 | 1.36 | 2.69 | 7.7 | 5 | 219 | 42 | 15.1 | 6.1 | 5.51 |
| 10-09-2025 00:00 | 49.89217 | -6.31401 | 1.42 | 2.09 | 6.7 | 5.3 | 186 | 35 | 15.1 | 6.5 | 6.39 |
