National Network of Regional Coastal Monitoring Programmes

« Return to map for other wave, tide and met stations.

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

Wave Spectra for 17/02/2026 02:00 GMT

Wave Spectra page developed in conjunction with Fugro GB Limited.

Select month:

Select File:

(i) stands for Iridium

View Chart Data

Download Spectra

Sea and Swell Summary for (17/02/2026 02:00 GMT)
Significant Wave Height (m)	0.08
Wave zero up crossing period (Spectrum Tz) (s)	2.4
Wind Wave Significant Wave Height (m)	0.07
Wind Wave Peak Period (s)	7.5
Wind Wave Peak Period Direction (°)	0
Swell Significant Wave Height (m)	0.04
Swell Peak Period (s)	25.6
Swell Peak Period Direction (°)	0
% Swell	21.6

Wave Spectra for date 17/02/2026 02:00:

Frequency (Hz)	Period (s)	Normalised Energy	Energy
0.0313	31.9	0.848	0.002
0.0391	25.6	1	0.002
0.0469	21.3	0.73	0.001
0.0547	18.3	0.554	0.001
0.0625	16	0.529	0.001
0.0703	14.2	0.414	0.001
0.0781	12.8	0.361	0.001
0.0859	11.6	0.378	0.001
0.0938	10.7	0.435	0.001
0.1016	9.8	0.496	0.001
0.1094	9.1	0.47	0.001
0.1172	8.5	0.423	0.001
0.1250	8	0.453	0.001
0.1328	7.5	0.515	0.001
0.1406	7.1	0.432	0.001
0.1484	6.7	0.36	0.001
0.1563	6.4	0.337	0.001
0.1641	6.1	0.32	0.001
0.1719	5.8	0.389	0.001
0.1797	5.6	0.435	0.001
0.1875	5.3	0.345	0.001
0.1953	5.1	0.312	0.001
0.2031	4.9	0.371	0.001
0.2109	4.7	0.44	0.001
0.2188	4.6	0.388	0.001
0.2266	4.4	0.308	0.001
0.2344	4.3	0.312	0.001
0.2422	4.1	0.37	0.001
0.2500	4	0.432	0.001
0.2578	3.9	0.42	0.001
0.2656	3.8	0.376	0.001
0.2734	3.7	0.35	0.001
0.2813	3.6	0.327	0.001
0.2891	3.5	0.344	0.001
0.2969	3.4	0.319	0.001
0.3047	3.3	0.289	0.001
0.3125	3.2	0.288	0.001
0.3203	3.1	0.222	0
0.3281	3	0.226	0
0.3359	3	0.255	0
0.3438	2.9	0.284	0.001
0.3516	2.8	0.281	0.001
0.3594	2.8	0.231	0
0.3672	2.7	0.236	0
0.3750	2.7	0.3	0.001
0.3828	2.6	0.291	0.001
0.3906	2.6	0.269	0.001
0.3984	2.5	0.272	0.001
0.4063	2.5	0.214	0
0.4141	2.4	0.176	0
0.4219	2.4	0.165	0
0.4297	2.3	0.165	0
0.4375	2.3	0.195	0
0.4453	2.2	0.17	0
0.4531	2.2	0.145	0
0.4609	2.2	0.171	0
0.4688	2.1	0.212	0
0.4766	2.1	0.24	0
0.4844	2.1	0.244	0
0.4922	2	0.202	0
0.5000	2	0.17	0
0.5078	2	0.181	0
0.5156	1.9	0.232	0
0.5234	1.9	0.227	0
0.5313	1.9	0.197	0
0.5391	1.9	0.186	0
0.5469	1.8	0.175	0
0.5547	1.8	0.197	0
0.5625	1.8	0.2	0
0.5703	1.8	0.176	0
0.5781	1.7	0.151	0
0.5859	1.7	0.155	0
0.5938	1.7	0.203	0
0.6016	1.7	0.205	0
0.6094	1.6	0.192	0
0.6172	1.6	0.179	0
0.6250	1.6	0.151	0
0.6328	1.6	0.156	0
0.6406	1.6	0.154	0
0.6484	1.5	0.159	0
0.6563	1.5	0.155	0
0.6641	1.5	0.13	0
0.6719	1.5	0.136	0
0.6797	1.5	0.162	0
0.6875	1.5	0.167	0
0.6953	1.4	0.122	0
0.7031	1.4	0.104	0
0.7109	1.4	0.116	0
0.7188	1.4	0.112	0
0.7266	1.4	0.121	0
0.7344	1.4	0.139	0
0.7422	1.3	0.111	0
0.7500	1.3	0.107	0
0.7578	1.3	0.128	0
0.7656	1.3	0.152	0
0.7734	1.3	0.143	0
0.7813	1.3	0.114	0
0.7891	1.3	0.13	0
0.7969	1.3	0.154	0
0.8047	1.2	0.154	0
0.8125	1.2	0.155	0
0.8203	1.2	0.154	0
0.8281	1.2	0.12	0
0.8359	1.2	0.103	0
0.8438	1.2	0.114	0
0.8516	1.2	0.123	0
0.8594	1.2	0.1	0
0.8672	1.2	0.084	0
0.8750	1.1	0.095	0
0.8828	1.1	0.093	0
0.8906	1.1	0.085	0
0.8984	1.1	0.094	0
0.9063	1.1	0.106	0

National Network of Regional Coastal Monitoring Programmes

Second Severn Crossing

Wave Spectra for 17/02/2026 02:00 GMTWave Spectra page developed in conjunction with Fugro GB Limited.

Data Selection (Click to expand)

Data Display & Download (Click to expand)

We would appreciate your feedback on the Website and Map Viewer Feedback

Wave Spectra for 17/02/2026 02:00 GMT

Wave Spectra page developed in conjunction with Fugro GB Limited.

We would appreciate your feedback on the Website and Map Viewer