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) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 21-04-2026 22:00 | 49.89167 | -6.31416 | 3.4 | 4.69 | 9.1 | 6.3 | 101 | 21 | 11.3 | 7.4 | 42.25 |
| 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 21-04-2026 22:00 | 49.89167 | -6.31416 | 3.4 | 4.69 | 9.1 | 6.3 | 101 | 21 | 11.3 | 7.4 | 42.25 |
| 21-04-2026 21:30 | 49.89163 | -6.31396 | 3.43 | 4.76 | 9.1 | 6.2 | 98 | 25 | 11.3 | 7.2 | 41.53 |
| 21-04-2026 21:00 | 49.89128 | -6.31300 | 3.65 | 5.48 | 8.3 | 6.3 | 100 | 21 | 11.3 | 7.4 | 48.06 |
| 21-04-2026 20:30 | 49.89166 | -6.31368 | 3.39 | 4.72 | 8.3 | 6.3 | 101 | 22 | 11.2 | 7.5 | 42.09 |
| 21-04-2026 20:00 | 49.89216 | -6.31291 | 3.63 | 6.52 | 9.1 | 6.5 | 91 | 22 | 11.2 | 7.5 | 48.19 |
| 21-04-2026 19:30 | 49.89286 | -6.31184 | 3.68 | 8.36 | 8.3 | 6.5 | 98 | 18 | 11.3 | 7.5 | 49.65 |
| 21-04-2026 19:00 | 49.89286 | -6.31169 | 3.55 | 6.44 | 8.3 | 6.3 | 96 | 21 | 11.3 | 7.3 | 45.26 |
| 21-04-2026 18:30 | 49.89285 | -6.31162 | 3.47 | 5.11 | 7.7 | 6.3 | 97 | 20 | 11.3 | 7.3 | 42.89 |
| 21-04-2026 18:00 | 49.89293 | -6.31171 | 3.33 | 4.82 | 8.3 | 6.3 | 101 | 17 | 11.3 | 7.2 | 39.4 |
| 21-04-2026 17:30 | 49.89293 | -6.31162 | 3.45 | 5.1 | 9.1 | 6.5 | 103 | 18 | 11.3 | 7.5 | 43.63 |
| 21-04-2026 17:00 | 49.89296 | -6.31175 | 3.28 | 5.34 | 8.3 | 6.3 | 104 | 22 | 11.3 | 7.1 | 37.53 |
| 21-04-2026 16:30 | 49.89303 | -6.31182 | 3.3 | 5.08 | 8.3 | 6.3 | 108 | 16 | 11.3 | 7.2 | 38.58 |
| 21-04-2026 16:00 | 49.89309 | -6.31205 | 3.35 | 4.83 | 7.7 | 6.3 | 106 | 18 | 11.3 | 7.2 | 39.37 |
| 21-04-2026 15:30 | 49.89311 | -6.31235 | 3.21 | 5.11 | 8.3 | 6 | 107 | 19 | 11.3 | 6.9 | 34.99 |
| 21-04-2026 15:00 | 49.89307 | -6.31295 | 3.11 | 4.49 | 7.7 | 5.9 | 108 | 20 | 11.3 | 6.8 | 32.09 |
| 21-04-2026 14:30 | 49.89274 | -6.31381 | 2.99 | 3.9 | 7.1 | 5.7 | 106 | 19 | 11.3 | 6.6 | 28.91 |
| 21-04-2026 14:00 | 49.89233 | -6.31405 | 2.9 | 5.03 | 7.7 | 5.6 | 101 | 19 | 11.3 | 6.5 | 26.96 |
| 21-04-2026 13:30 | 49.89212 | -6.31407 | 2.78 | 4.24 | 7.7 | 5.5 | 108 | 20 | 11.3 | 6.5 | 24.47 |
| 21-04-2026 13:00 | 49.89206 | -6.31405 | 2.88 | 4.84 | 7.7 | 5.5 | 111 | 18 | 11.3 | 6.4 | 25.89 |
| 21-04-2026 12:30 | 49.89224 | -6.31409 | 2.81 | 3.98 | 7.1 | 5.5 | 113 | 22 | 11.3 | 6.3 | 24.57 |
| 21-04-2026 12:00 | 49.89242 | -6.31407 | 2.94 | 4.24 | 7.7 | 5.6 | 114 | 20 | 11.3 | 6.5 | 27.74 |
| 21-04-2026 11:30 | 49.89223 | -6.31411 | 2.68 | 4.28 | 7.7 | 5.6 | 115 | 19 | 11.3 | 6.5 | 23.06 |
| 21-04-2026 11:00 | 49.89196 | -6.31407 | 2.51 | 4.91 | 7.7 | 5.4 | 115 | 17 | 11.2 | 6.6 | 20.25 |
| 21-04-2026 10:30 | 49.89181 | -6.31407 | 2.23 | 3.41 | 8.3 | 5.3 | 121 | 19 | 11.2 | 6.6 | 16.05 |
| 21-04-2026 10:00 | 49.89158 | -6.31413 | 2.23 | 3.29 | 8.3 | 5.5 | 115 | 18 | 11.2 | 6.7 | 16.45 |
| 21-04-2026 09:30 | 49.89180 | -6.31416 | 2.64 | 4.65 | 7.7 | 6.1 | 100 | 18 | 11.3 | 7.1 | 24.15 |
| 21-04-2026 09:00 | 49.89157 | -6.31377 | 2.85 | 4.65 | 8.3 | 6 | 98 | 20 | 11.3 | 6.9 | 27.62 |
| 21-04-2026 08:30 | 49.89136 | -6.31313 | 3.55 | 5.24 | 7.7 | 6.3 | 100 | 20 | 11.2 | 7.1 | 43.9 |
| 21-04-2026 08:00 | 49.89138 | -6.31257 | 3 | 4.25 | 8.3 | 5.9 | 101 | 19 | 11.2 | 6.8 | 30.22 |
| 21-04-2026 07:30 | 49.89165 | -6.31175 | 3.11 | 4.28 | 7.7 | 5.9 | 100 | 20 | 11.2 | 6.8 | 32.32 |
| 21-04-2026 07:00 | 49.89277 | -6.31169 | 2.96 | 4.95 | 7.7 | 6 | 98 | 21 | 11.2 | 6.8 | 29.44 |
| 21-04-2026 06:30 | 49.89277 | -6.31150 | 2.79 | 4.91 | 7.7 | 5.9 | 97 | 20 | 11.2 | 6.8 | 25.82 |
| 21-04-2026 06:00 | 49.89280 | -6.31150 | 2.88 | 4.37 | 7.7 | 5.9 | 103 | 23 | 11.3 | 6.7 | 27.31 |
| 21-04-2026 05:30 | 49.89289 | -6.31156 | 2.75 | 4.2 | 7.7 | 5.8 | 107 | 19 | 11.3 | 6.7 | 24.71 |
| 21-04-2026 05:00 | 49.89292 | -6.31160 | 2.69 | 4.09 | 7.7 | 5.8 | 100 | 19 | 11.3 | 6.7 | 23.68 |
| 21-04-2026 04:30 | 49.89299 | -6.31173 | 2.97 | 4.87 | 7.7 | 5.9 | 108 | 17 | 11.2 | 6.7 | 28.95 |
| 21-04-2026 04:00 | 49.89301 | -6.31184 | 2.67 | 4.06 | 7.7 | 5.7 | 108 | 20 | 11.3 | 6.6 | 22.98 |
| 21-04-2026 03:30 | 49.89309 | -6.31212 | 3.01 | 5.08 | 7.1 | 5.8 | 107 | 16 | 11.3 | 6.5 | 29.11 |
| 21-04-2026 03:00 | 49.89311 | -6.31222 | 2.63 | 3.98 | 7.1 | 5.5 | 108 | 17 | 11.3 | 6.3 | 21.49 |
| 21-04-2026 02:30 | 49.89306 | -6.31338 | 2.6 | 5.26 | 7.7 | 5.6 | 110 | 16 | 11.3 | 6.5 | 21.46 |
| 21-04-2026 02:00 | 49.89266 | -6.31394 | 2.37 | 3.97 | 6.3 | 5.3 | 111 | 21 | 11.3 | 6.1 | 16.87 |
| 21-04-2026 01:30 | 49.89224 | -6.31405 | 2.5 | 3.45 | 6.7 | 5.4 | 114 | 18 | 11.3 | 6.2 | 18.92 |
| 21-04-2026 01:00 | 49.89211 | -6.31407 | 2.33 | 3.73 | 7.1 | 5.1 | 120 | 18 | 11.3 | 6 | 15.91 |
| 21-04-2026 00:30 | 49.89197 | -6.31405 | 2.25 | 3.97 | 7.1 | 4.9 | 118 | 19 | 11.3 | 5.8 | 14.51 |
| 21-04-2026 00:00 | 49.89205 | -6.31407 | 2.24 | 3.64 | 6.7 | 5 | 117 | 21 | 11.3 | 5.8 | 14.36 |
| 20-04-2026 23:30 | 49.89244 | -6.31407 | 2.02 | 2.94 | 6.7 | 4.9 | 124 | 24 | 11.3 | 5.8 | 11.52 |
| 20-04-2026 23:00 | 49.89224 | -6.31409 | 1.76 | 2.97 | 7.1 | 4.7 | 125 | 23 | 11.3 | 5.8 | 8.82 |
| 20-04-2026 22:30 | 49.89202 | -6.31405 | 1.65 | 2.49 | 6.7 | 4.8 | 127 | 21 | 11.3 | 5.9 | 7.92 |
| 20-04-2026 22:00 | 49.89182 | -6.31403 | 1.56 | 2.67 | 6.7 | 4.7 | 121 | 19 | 11.3 | 5.9 | 7.05 |
