National Network of Regional Coastal Monitoring Programmes

« Dychwelid at fap am donau, llanw a gorsafoedd tywydd eraill.

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.

Second Severn Crossing

Tide Levels and Harmonics

 

 Blaenorol
Nesaf


Data llanw diweddaraf (Predicted Tide Table)

Amser (ASG)CodiadGweddill
20-06-2025 19:303.220.12
 Penllanw nesafDistyll nesaf
02:35, 11.36 20:11, 2.91
Dyddiad Uchaf 2025 Dyddiad Isaf 2025
27-04 15.33m 31-03 0.03m
Amser (ASG)CodiadGweddill
20-06-2025 19:303.220.12
20-06-2025 19:203.40.19
20-06-2025 19:103.590.25
20-06-2025 19:003.790.31
20-06-2025 18:504.010.36
20-06-2025 18:404.240.41
20-06-2025 18:304.460.42
20-06-2025 18:204.690.44
20-06-2025 18:104.920.42
20-06-2025 18:005.170.42
20-06-2025 17:505.40.39
20-06-2025 17:405.670.37
20-06-2025 17:305.920.34
20-06-2025 17:206.180.29
20-06-2025 17:106.450.25
20-06-2025 17:006.710.19
20-06-2025 16:506.970.12
20-06-2025 16:407.240.06
20-06-2025 16:307.52-0.01
20-06-2025 16:207.81-0.07
20-06-2025 16:108.09-0.14
20-06-2025 16:008.38-0.2
20-06-2025 15:508.65-0.26
20-06-2025 15:408.94-0.31
20-06-2025 15:309.22-0.35
20-06-2025 15:209.5-0.36
20-06-2025 15:109.76-0.38
20-06-2025 15:0010.04-0.35
20-06-2025 14:5010.3-0.31
20-06-2025 14:4010.52-0.27
20-06-2025 14:3010.71-0.23
20-06-2025 14:2010.84-0.2
20-06-2025 14:1010.94-0.16
20-06-2025 14:0011-0.13
20-06-2025 13:5010.99-0.13
20-06-2025 13:4010.95-0.11
20-06-2025 13:3010.87-0.11
20-06-2025 13:2010.75-0.11
20-06-2025 13:1010.59-0.12
20-06-2025 13:0010.41-0.12
20-06-2025 12:5010.21-0.12
20-06-2025 12:409.98-0.12
20-06-2025 12:309.73-0.13
20-06-2025 12:209.46-0.15
20-06-2025 12:109.17-0.16
20-06-2025 12:008.87-0.17
20-06-2025 11:508.56-0.18
20-06-2025 11:408.24-0.19
20-06-2025 11:307.91-0.2
20-06-2025 11:207.59-0.19
20-06-2025 11:107.27-0.17
20-06-2025 11:006.94-0.15
20-06-2025 10:506.62-0.12
20-06-2025 10:406.32-0.07
20-06-2025 10:306-0.03
20-06-2025 10:205.710.03
20-06-2025 10:105.410.07
20-06-2025 10:005.130.12
20-06-2025 09:504.840.14
20-06-2025 09:404.530.13
20-06-2025 09:304.210.1
20-06-2025 09:203.90.05
20-06-2025 09:103.6-0.01
20-06-2025 09:003.31-0.08
20-06-2025 08:503.08-0.12
20-06-2025 08:402.86-0.17
20-06-2025 08:302.63-0.25
20-06-2025 08:202.47-0.31
20-06-2025 08:102.38-0.31
20-06-2025 08:002.38-0.25
20-06-2025 07:502.41-0.18
20-06-2025 07:402.49-0.09
20-06-2025 07:302.6-0
20-06-2025 07:202.710.06
20-06-2025 07:102.870.14
20-06-2025 07:003.050.22
20-06-2025 06:503.240.28
20-06-2025 06:403.440.34
20-06-2025 06:303.670.39
20-06-2025 06:203.920.45
20-06-2025 06:104.170.48
20-06-2025 06:004.410.5
20-06-2025 05:504.650.49
20-06-2025 05:404.910.5
20-06-2025 05:305.170.48
20-06-2025 05:205.420.45
20-06-2025 05:105.690.43
20-06-2025 05:005.960.4
20-06-2025 04:506.230.36
20-06-2025 04:406.520.32
20-06-2025 04:306.790.27
20-06-2025 04:207.080.23
20-06-2025 04:107.380.19
20-06-2025 04:007.670.14
20-06-2025 03:507.970.08
20-06-2025 03:408.270.04
20-06-2025 03:308.56-0.01
20-06-2025 03:208.85-0.07
20-06-2025 03:109.14-0.11
20-06-2025 03:009.45-0.12
20-06-2025 02:509.75-0.13
20-06-2025 02:4010.03-0.13
20-06-2025 02:3010.3-0.11
20-06-2025 02:2010.56-0.08
20-06-2025 02:1010.78-0.04
20-06-2025 02:0010.95-0.03
20-06-2025 01:5011.09-0.01
20-06-2025 01:4011.180
20-06-2025 01:3011.220.01
20-06-2025 01:2011.21-0
20-06-2025 01:1011.15-0.03
20-06-2025 01:0011.04-0.07
20-06-2025 00:5010.91-0.1
20-06-2025 00:4010.75-0.12
20-06-2025 00:3010.57-0.15
20-06-2025 00:2010.38-0.16
20-06-2025 00:1010.17-0.17
20-06-2025 00:009.93-0.18
19-06-2025 23:509.68-0.19
19-06-2025 23:409.43-0.18
19-06-2025 23:309.16-0.19
19-06-2025 23:208.87-0.2
19-06-2025 23:108.59-0.18
19-06-2025 23:008.3-0.17
19-06-2025 22:508.01-0.14
19-06-2025 22:407.72-0.1
19-06-2025 22:307.43-0.07
19-06-2025 22:207.14-0.02
19-06-2025 22:106.850.03
19-06-2025 22:006.560.08
19-06-2025 21:506.290.14
19-06-2025 21:406.010.19
19-06-2025 21:305.740.24
19-06-2025 21:205.480.3
19-06-2025 21:105.230.34
19-06-2025 21:004.970.37
19-06-2025 20:504.710.37
19-06-2025 20:404.440.35
19-06-2025 20:304.160.3
19-06-2025 20:203.90.25
19-06-2025 20:103.630.16
19-06-2025 20:003.40.09
19-06-2025 19:503.17-0
19-06-2025 19:402.97-0.08
19-06-2025 19:302.79-0.18
19-06-2025 19:202.69-0.23
19-06-2025 19:102.69-0.19
19-06-2025 19:002.74-0.15
19-06-2025 18:502.83-0.08
19-06-2025 18:402.95-0.01
19-06-2025 18:303.10.06
19-06-2025 18:203.280.14
19-06-2025 18:103.460.19
19-06-2025 18:003.670.25
19-06-2025 17:503.880.29
19-06-2025 17:404.10.33
19-06-2025 17:304.330.36
19-06-2025 17:204.570.38
19-06-2025 17:104.790.38
19-06-2025 17:005.030.38
19-06-2025 16:505.280.38
19-06-2025 16:405.520.36
19-06-2025 16:305.770.35
19-06-2025 16:206.040.33
19-06-2025 16:106.30.3
19-06-2025 16:006.550.26
19-06-2025 15:506.820.22
19-06-2025 15:407.10.17
19-06-2025 15:307.390.13
19-06-2025 15:207.680.09
19-06-2025 15:107.960.03
19-06-2025 15:008.26-0.03
19-06-2025 14:508.56-0.07
19-06-2025 14:408.85-0.11
19-06-2025 14:309.15-0.15
19-06-2025 14:209.45-0.16
19-06-2025 14:109.74-0.16
19-06-2025 14:0010.03-0.14
19-06-2025 13:5010.3-0.11
19-06-2025 13:4010.55-0.07
19-06-2025 13:3010.74-0.04
19-06-2025 13:2010.89-0.02
19-06-2025 13:10110
19-06-2025 13:0011.050.01
19-06-2025 12:5011.070.02
19-06-2025 12:4011.030
19-06-2025 12:3010.95-0.01
19-06-2025 12:2010.82-0.03
19-06-2025 12:1010.68-0.05
19-06-2025 12:0010.5-0.06
19-06-2025 11:5010.31-0.07
19-06-2025 11:4010.08-0.09
19-06-2025 11:309.82-0.13
19-06-2025 11:209.56-0.15
19-06-2025 11:109.28-0.16
19-06-2025 11:008.98-0.18
19-06-2025 10:508.69-0.18
19-06-2025 10:408.37-0.2
19-06-2025 10:308.05-0.21
19-06-2025 10:207.72-0.21
19-06-2025 10:107.39-0.2
19-06-2025 10:007.06-0.19
19-06-2025 09:506.74-0.16
19-06-2025 09:406.42-0.13
19-06-2025 09:306.1-0.09
19-06-2025 09:205.78-0.06
19-06-2025 09:105.490.01
19-06-2025 09:005.20.06
19-06-2025 08:504.90.09
19-06-2025 08:404.60.11
19-06-2025 08:304.290.09
19-06-2025 08:203.970.06
19-06-2025 08:103.65-0.01
19-06-2025 08:003.33-0.09
19-06-2025 07:503.06-0.14
19-06-2025 07:402.82-0.2
19-06-2025 07:302.58-0.28
19-06-2025 07:202.38-0.37
19-06-2025 07:102.26-0.39
19-06-2025 07:002.23-0.36
19-06-2025 06:502.28-0.27
19-06-2025 06:402.38-0.18
19-06-2025 06:302.5-0.09
19-06-2025 06:202.64-0.02
19-06-2025 06:102.810.06
19-06-2025 06:002.980.11
19-06-2025 05:503.170.17
19-06-2025 05:403.380.21
19-06-2025 05:303.610.26
19-06-2025 05:203.840.28
19-06-2025 05:104.090.31
19-06-2025 05:004.340.33
19-06-2025 04:504.580.34
19-06-2025 04:404.840.35
19-06-2025 04:305.090.35
19-06-2025 04:205.340.34
19-06-2025 04:105.620.35
19-06-2025 04:005.890.34
19-06-2025 03:506.150.33
19-06-2025 03:406.420.31
19-06-2025 03:306.70.28
19-06-2025 03:206.970.25
19-06-2025 03:107.260.22
19-06-2025 03:007.550.18
19-06-2025 02:507.860.15
19-06-2025 02:408.160.11
19-06-2025 02:308.460.06
19-06-2025 02:208.760.01
19-06-2025 02:109.06-0.02
19-06-2025 02:009.37-0.05
19-06-2025 01:509.67-0.06
19-06-2025 01:409.97-0.06
19-06-2025 01:3010.24-0.06
19-06-2025 01:2010.51-0.03
19-06-2025 01:1010.74-0.01
19-06-2025 01:0010.920
19-06-2025 00:5011.060.01
19-06-2025 00:4011.170.02
19-06-2025 00:3011.230.04
19-06-2025 00:2011.240.03
19-06-2025 00:1011.20.01
19-06-2025 00:0011.12-0.01
18-06-2025 23:5011.01-0.03
18-06-2025 23:4010.86-0.06
18-06-2025 23:3010.69-0.08
18-06-2025 23:2010.49-0.11
18-06-2025 23:1010.27-0.14
18-06-2025 23:0010.02-0.17
18-06-2025 22:509.76-0.19
18-06-2025 22:409.5-0.21
18-06-2025 22:309.22-0.22
18-06-2025 22:208.92-0.25
18-06-2025 22:108.64-0.24
18-06-2025 22:008.34-0.23
18-06-2025 21:508.03-0.23
18-06-2025 21:407.72-0.22
18-06-2025 21:307.42-0.19
18-06-2025 21:207.11-0.15
18-06-2025 21:106.82-0.11
18-06-2025 21:006.52-0.06
18-06-2025 20:506.240.01
18-06-2025 20:405.960.07
18-06-2025 20:305.680.13
18-06-2025 20:205.420.2
18-06-2025 20:105.160.26
18-06-2025 20:004.870.28
18-06-2025 19:504.590.28
18-06-2025 19:404.290.25
18-06-2025 19:303.980.18
18-06-2025 19:203.680.11
18-06-2025 19:103.410.03