Tidal level Dorset Coast at Portland

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Latest recorded level -0.62m at 7:00am Monday 21 September 2020.

Tidal levels at this location in the last 5 days

Now
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• Measured level
• Highest level on record 2.02m

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Observed data

DateTime	Value	Error
2020-09-21T06:00Z	-0.625	false
2020-09-21T05:45Z	-0.781	false
2020-09-21T05:30Z	-0.859	false
2020-09-21T05:15Z	-0.868	false
2020-09-21T05:00Z	-0.84	false
2020-09-21T04:45Z	-0.78	false
2020-09-21T04:30Z	-0.73	false
2020-09-21T04:15Z	-0.685	false
2020-09-21T04:00Z	-0.645	false
2020-09-21T03:45Z	-0.596	false
2020-09-21T03:30Z	-0.58	false
2020-09-21T03:15Z	-0.542	false
2020-09-21T03:00Z	-0.526	false
2020-09-21T02:45Z	-0.507	false
2020-09-21T02:30Z	-0.568	false
2020-09-21T02:15Z	-0.671	false
2020-09-21T02:00Z	-0.767	false
2020-09-21T01:45Z	-0.779	false
2020-09-21T01:30Z	-0.726	false
2020-09-21T01:15Z	-0.611	false
2020-09-21T01:00Z	-0.436	false
2020-09-21T00:45Z	-0.239	false
2020-09-21T00:30Z	-0.019	false
2020-09-21T00:15Z	0.214	false
2020-09-21T00:00Z	0.426	false
2020-09-20T23:45Z	0.624	false
2020-09-20T23:30Z	0.816	false
2020-09-20T23:15Z	0.983	false
2020-09-20T23:00Z	1.125	false
2020-09-20T22:45Z	1.271	false
2020-09-20T22:30Z	1.377	false
2020-09-20T22:15Z	1.451	false
2020-09-20T22:00Z	1.505	false
2020-09-20T21:45Z	1.539	false
2020-09-20T21:30Z	1.557	false
2020-09-20T21:15Z	1.572	false
2020-09-20T21:00Z	1.576	false
2020-09-20T20:45Z	1.552	false
2020-09-20T20:30Z	1.515	false
2020-09-20T20:15Z	1.471	false
2020-09-20T20:00Z	1.404	false
2020-09-20T19:45Z	1.284	false
2020-09-20T19:30Z	1.159	false
2020-09-20T19:15Z	0.98	false
2020-09-20T19:00Z	0.76	false
2020-09-20T18:45Z	0.519	false
2020-09-20T18:30Z	0.276	false
2020-09-20T18:15Z	0.039	false
2020-09-20T18:00Z	-0.185	false
2020-09-20T17:45Z	-0.406	false
2020-09-20T17:30Z	-0.591	false
2020-09-20T17:15Z	-0.704	false
2020-09-20T17:00Z	-0.748	false
2020-09-20T16:45Z	-0.745	false
2020-09-20T16:30Z	-0.705	false
2020-09-20T16:15Z	-0.647	false
2020-09-20T16:00Z	-0.619	false
2020-09-20T15:45Z	-0.592	false
2020-09-20T15:30Z	-0.541	false
2020-09-20T15:15Z	-0.516	false
2020-09-20T15:00Z	-0.51	false
2020-09-20T14:45Z	-0.463	false
2020-09-20T14:30Z	-0.444	false
2020-09-20T14:15Z	-0.502	false
2020-09-20T14:00Z	-0.593	false
2020-09-20T13:45Z	-0.701	false
2020-09-20T13:30Z	-0.778	false
2020-09-20T13:15Z	-0.76	false
2020-09-20T13:00Z	-0.656	false
2020-09-20T12:45Z	-0.504	false
2020-09-20T12:30Z	-0.307	false
2020-09-20T12:15Z	-0.091	false
2020-09-20T12:00Z	0.1	false
2020-09-20T11:45Z	0.341	false
2020-09-20T11:30Z	0.538	false
2020-09-20T11:15Z	0.737	false
2020-09-20T11:00Z	0.897	false
2020-09-20T10:45Z	1.032	false
2020-09-20T10:30Z	1.168	false
2020-09-20T10:15Z	1.279	false
2020-09-20T10:00Z	1.371	false
2020-09-20T09:45Z	1.404	false
2020-09-20T09:30Z	1.428	false
2020-09-20T09:15Z	1.453	false
2020-09-20T09:00Z	1.472	false
2020-09-20T08:45Z	1.491	false
2020-09-20T08:30Z	1.47	false
2020-09-20T08:15Z	1.408	false
2020-09-20T08:00Z	1.345	false
2020-09-20T07:45Z	1.293	false
2020-09-20T07:30Z	1.185	false
2020-09-20T07:15Z	1.054	false
2020-09-20T07:00Z	0.876	false
2020-09-20T06:45Z	0.645	false
2020-09-20T06:30Z	0.395	false
2020-09-20T06:15Z	0.146	false
2020-09-20T06:00Z	-0.106	false
2020-09-20T05:45Z	-0.347	false
2020-09-20T05:30Z	-0.598	false
2020-09-20T05:15Z	-0.798	false
2020-09-20T05:00Z	-0.968	false
2020-09-20T04:45Z	-1.001	false
2020-09-20T04:30Z	-1.001	false
2020-09-20T04:15Z	-1.001	false
2020-09-20T04:00Z	-0.961	false
2020-09-20T03:45Z	-0.895	false
2020-09-20T03:30Z	-0.838	false
2020-09-20T03:15Z	-0.788	false
2020-09-20T03:00Z	-0.732	false
2020-09-20T02:45Z	-0.699	false
2020-09-20T02:30Z	-0.661	false
2020-09-20T02:15Z	-0.576	false
2020-09-20T02:00Z	-0.587	false
2020-09-20T01:45Z	-0.642	false
2020-09-20T01:30Z	-0.747	false
2020-09-20T01:15Z	-0.806	false
2020-09-20T01:00Z	-0.847	false
2020-09-20T00:45Z	-0.754	false
2020-09-20T00:30Z	-0.581	false
2020-09-20T00:15Z	-0.393	false
2020-09-20T00:00Z	-0.168	false
2020-09-19T23:45Z	0.061	false
2020-09-19T23:30Z	0.301	false
2020-09-19T23:15Z	0.517	false
2020-09-19T23:00Z	0.747	false
2020-09-19T22:45Z	0.956	false
2020-09-19T22:30Z	1.117	false
2020-09-19T22:15Z	1.259	false
2020-09-19T22:00Z	1.402	false
2020-09-19T21:45Z	1.528	false
2020-09-19T21:30Z	1.606	false
2020-09-19T21:15Z	1.647	false
2020-09-19T21:00Z	1.651	false
2020-09-19T20:45Z	1.647	false
2020-09-19T20:30Z	1.696	false
2020-09-19T20:15Z	1.695	false
2020-09-19T20:00Z	1.645	false
2020-09-19T19:45Z	1.595	false
2020-09-19T19:30Z	1.556	false
2020-09-19T19:15Z	1.473	false
2020-09-19T19:00Z	1.364	false
2020-09-19T18:45Z	1.215	false
2020-09-19T18:30Z	1.001	false
2020-09-19T18:15Z	0.771	false
2020-09-19T18:00Z	0.527	false
2020-09-19T17:45Z	0.27	false
2020-09-19T17:30Z	0.009	false
2020-09-19T17:15Z	-0.237	false
2020-09-19T17:00Z	-0.461	false
2020-09-19T16:45Z	-0.644	false
2020-09-19T16:30Z	-0.77	false
2020-09-19T16:15Z	-0.808	false
2020-09-19T16:00Z	-0.786	false
2020-09-19T15:45Z	-0.749	false
2020-09-19T15:30Z	-0.693	false
2020-09-19T15:15Z	-0.679	false
2020-09-19T15:00Z	-0.659	false
2020-09-19T14:45Z	-0.602	false
2020-09-19T14:30Z	-0.574	false
2020-09-19T14:15Z	-0.551	false
2020-09-19T14:00Z	-0.516	false
2020-09-19T13:45Z	-0.501	false
2020-09-19T13:30Z	-0.568	false
2020-09-19T13:15Z	-0.654	false
2020-09-19T13:00Z	-0.753	false
2020-09-19T12:45Z	-0.805	false
2020-09-19T12:30Z	-0.767	false
2020-09-19T12:15Z	-0.637	false
2020-09-19T12:00Z	-0.492	false
2020-09-19T11:45Z	-0.262	false
2020-09-19T11:30Z	-0.046	false
2020-09-19T11:15Z	0.185	false
2020-09-19T11:00Z	0.416	false
2020-09-19T10:45Z	0.643	false
2020-09-19T10:30Z	0.825	false
2020-09-19T10:15Z	0.967	false
2020-09-19T10:00Z	1.132	false
2020-09-19T09:45Z	1.245	false
2020-09-19T09:30Z	1.336	false
2020-09-19T09:15Z	1.407	false
2020-09-19T09:00Z	1.437	false
2020-09-19T08:45Z	1.466	false
2020-09-19T08:30Z	1.517	false
2020-09-19T08:15Z	1.536	false
2020-09-19T08:00Z	1.49	false
2020-09-19T07:45Z	1.445	false
2020-09-19T07:30Z	1.401	false
2020-09-19T07:15Z	1.353	false
2020-09-19T07:00Z	1.291	false
2020-09-19T06:45Z	1.208	false
2020-09-19T06:30Z	1.017	false
2020-09-19T06:15Z	0.826	false
2020-09-19T06:00Z	0.577	false
2020-09-19T05:45Z	0.31	false
2020-09-19T05:30Z	0.072	false
2020-09-19T05:15Z	-0.19	false
2020-09-19T05:00Z	-0.438	false
2020-09-19T04:45Z	-0.68	false
2020-09-19T04:30Z	-0.893	false
2020-09-19T04:15Z	-1.001	false
2020-09-19T04:00Z	-1.001	false
2020-09-19T03:45Z	-1.001	false
2020-09-19T03:30Z	-1.001	false
2020-09-19T03:15Z	-1.001	false
2020-09-19T03:00Z	-0.932	false
2020-09-19T02:45Z	-0.89	false
2020-09-19T02:30Z	-0.865	false
2020-09-19T02:15Z	-0.791	false
2020-09-19T02:00Z	-0.758	false
2020-09-19T01:45Z	-0.712	false
2020-09-19T01:30Z	-0.672	false
2020-09-19T01:15Z	-0.648	false
2020-09-19T01:00Z	-0.716	false
2020-09-19T00:45Z	-0.809	false
2020-09-19T00:30Z	-0.888	false
2020-09-19T00:15Z	-0.888	false
2020-09-19T00:00Z	-0.776	false
2020-09-18T23:45Z	-0.609	false
2020-09-18T23:30Z	-0.421	false
2020-09-18T23:15Z	-0.193	false
2020-09-18T23:00Z	0.052	false
2020-09-18T22:45Z	0.272	false
2020-09-18T22:30Z	0.507	false
2020-09-18T22:15Z	0.715	false
2020-09-18T22:00Z	0.893	false
2020-09-18T21:45Z	1.085	false
2020-09-18T21:30Z	1.217	false
2020-09-18T21:15Z	1.338	false
2020-09-18T21:00Z	1.463	false
2020-09-18T20:45Z	1.511	false
2020-09-18T20:30Z	1.559	false
2020-09-18T20:15Z	1.568	false
2020-09-18T20:00Z	1.589	false
2020-09-18T19:45Z	1.609	false
2020-09-18T19:30Z	1.611	false
2020-09-18T19:15Z	1.56	false
2020-09-18T19:00Z	1.514	false
2020-09-18T18:45Z	1.467	false
2020-09-18T18:30Z	1.371	false
2020-09-18T18:15Z	1.272	false
2020-09-18T18:00Z	1.103	false
2020-09-18T17:45Z	0.87	false
2020-09-18T17:30Z	0.651	false
2020-09-18T17:15Z	0.404	false
2020-09-18T17:00Z	0.16	false
2020-09-18T16:45Z	-0.066	false
2020-09-18T16:30Z	-0.322	false
2020-09-18T16:15Z	-0.576	false
2020-09-18T16:00Z	-0.734	false
2020-09-18T15:45Z	-0.81	false
2020-09-18T15:30Z	-0.822	false
2020-09-18T15:15Z	-0.835	false
2020-09-18T15:00Z	-0.802	false
2020-09-18T14:45Z	-0.756	false
2020-09-18T14:30Z	-0.733	false
2020-09-18T14:15Z	-0.719	false
2020-09-18T14:00Z	-0.684	false
2020-09-18T13:45Z	-0.712	false
2020-09-18T13:30Z	-0.668	false
2020-09-18T13:15Z	-0.635	false
2020-09-18T13:00Z	-0.626	false
2020-09-18T12:45Z	-0.704	false
2020-09-18T12:30Z	-0.794	false
2020-09-18T12:15Z	-0.891	false
2020-09-18T12:00Z	-0.869	false
2020-09-18T11:45Z	-0.813	false
2020-09-18T11:30Z	-0.701	false
2020-09-18T11:15Z	-0.549	false
2020-09-18T11:00Z	-0.344	false
2020-09-18T10:45Z	-0.121	false
2020-09-18T10:30Z	0.091	false
2020-09-18T10:15Z	0.287	false
2020-09-18T10:00Z	0.483	false
2020-09-18T09:45Z	0.647	false
2020-09-18T09:30Z	0.816	false
2020-09-18T09:15Z	0.951	false
2020-09-18T09:00Z	1.059	false
2020-09-18T08:45Z	1.167	false
2020-09-18T08:30Z	1.227	false
2020-09-18T08:15Z	1.279	false
2020-09-18T08:00Z	1.283	false
2020-09-18T07:45Z	1.34	false
2020-09-18T07:30Z	1.319	false
2020-09-18T07:15Z	1.286	false
2020-09-18T07:00Z	1.247	false
2020-09-18T06:45Z	1.172	false
2020-09-18T06:30Z	1.13	false
2020-09-18T06:15Z	1.04	false
2020-09-18T06:00Z	0.93	false
2020-09-18T05:45Z	0.765	false
2020-09-18T05:30Z	0.556	false
2020-09-18T05:15Z	0.332	false
2020-09-18T05:00Z	0.069	false
2020-09-18T04:45Z	-0.17	false
2020-09-18T04:30Z	-0.397	false
2020-09-18T04:15Z	-0.612	false
2020-09-18T04:00Z	-0.846	false
2020-09-18T03:45Z	-1.001	false
2020-09-18T03:30Z	-1.001	false
2020-09-18T03:15Z	-1.001	false
2020-09-18T03:00Z	-1.001	false
2020-09-18T02:45Z	-1.001	false
2020-09-18T02:30Z	-1.001	false
2020-09-18T02:15Z	-1.001	false
2020-09-18T02:00Z	-0.972	false
2020-09-18T01:45Z	-0.917	false
2020-09-18T01:30Z	-0.887	false
2020-09-18T01:15Z	-0.847	false
2020-09-18T01:00Z	-0.817	false
2020-09-18T00:45Z	-0.774	false
2020-09-18T00:30Z	-0.78	false
2020-09-18T00:15Z	-0.846	false
2020-09-18T00:00Z	-0.923	false
2020-09-17T23:45Z	-0.982	false
2020-09-17T23:30Z	-0.964	false
2020-09-17T23:15Z	-0.843	false
2020-09-17T23:00Z	-0.688	false
2020-09-17T22:45Z	-0.488	false
2020-09-17T22:30Z	-0.302	false
2020-09-17T22:15Z	-0.086	false
2020-09-17T22:00Z	0.108	false
2020-09-17T21:45Z	0.324	false
2020-09-17T21:30Z	0.542	false
2020-09-17T21:15Z	0.706	false
2020-09-17T21:00Z	0.865	false
2020-09-17T20:45Z	1.013	false
2020-09-17T20:30Z	1.119	false
2020-09-17T20:15Z	1.211	false
2020-09-17T20:00Z	1.257	false
2020-09-17T19:45Z	1.306	false
2020-09-17T19:30Z	1.318	false
2020-09-17T19:15Z	1.322	false
2020-09-17T19:00Z	1.353	false
2020-09-17T18:45Z	1.326	false
2020-09-17T18:30Z	1.291	false
2020-09-17T18:15Z	1.256	false
2020-09-17T18:00Z	1.202	false
2020-09-17T17:45Z	1.103	false
2020-09-17T17:30Z	0.978	false
2020-09-17T17:15Z	0.826	false
2020-09-17T17:00Z	0.642	false
2020-09-17T16:45Z	0.422	false
2020-09-17T16:30Z	0.214	false
2020-09-17T16:15Z	-0.006	false
2020-09-17T16:00Z	-0.216	false
2020-09-17T15:45Z	-0.425	false
2020-09-17T15:30Z	-0.603	false
2020-09-17T15:15Z	-0.735	false
2020-09-17T15:00Z	-0.799	false
2020-09-17T14:45Z	-0.843	false
2020-09-17T14:30Z	-0.815	false
2020-09-17T14:15Z	-0.792	false
2020-09-17T14:00Z	-0.753	false
2020-09-17T13:45Z	-0.746	false
2020-09-17T13:30Z	-0.737	false
2020-09-17T13:15Z	-0.736	false
2020-09-17T13:00Z	-0.715	false
2020-09-17T12:45Z	-0.721	false
2020-09-17T12:30Z	-0.678	false
2020-09-17T12:15Z	-0.701	false
2020-09-17T12:00Z	-0.779	false
2020-09-17T11:45Z	-0.837	false
2020-09-17T11:30Z	-0.895	false
2020-09-17T11:15Z	-0.882	false
2020-09-17T11:00Z	-0.818	false
2020-09-17T10:45Z	-0.693	false
2020-09-17T10:30Z	-0.555	false
2020-09-17T10:15Z	-0.36	false
2020-09-17T10:00Z	-0.156	false
2020-09-17T09:45Z	0.014	false
2020-09-17T09:30Z	0.174	false
2020-09-17T09:15Z	0.354	false
2020-09-17T09:00Z	0.517	false
2020-09-17T08:45Z	0.659	false
2020-09-17T08:30Z	0.782	false
2020-09-17T08:15Z	0.909	false
2020-09-17T08:00Z	1	false
2020-09-17T07:45Z	1.052	false
2020-09-17T07:30Z	1.093	false
2020-09-17T07:15Z	1.118	false
2020-09-17T07:00Z	1.151	false
2020-09-17T06:45Z	1.162	false
2020-09-17T06:30Z	1.143	false
2020-09-17T06:15Z	1.125	false
2020-09-17T06:00Z	1.09	false
2020-09-17T05:45Z	1.033	false
2020-09-17T05:30Z	0.95	false
2020-09-17T05:15Z	0.857	false
2020-09-17T05:00Z	0.713	false
2020-09-17T04:45Z	0.538	false
2020-09-17T04:30Z	0.358	false
2020-09-17T04:15Z	0.137	false
2020-09-17T04:00Z	-0.064	false
2020-09-17T03:45Z	-0.273	false
2020-09-17T03:30Z	-0.477	false
2020-09-17T03:15Z	-0.641	false
2020-09-17T03:00Z	-0.76	false
2020-09-17T02:45Z	-0.854	false
2020-09-17T02:30Z	-0.88	false
2020-09-17T02:15Z	-0.886	false
2020-09-17T02:00Z	-0.827	false
2020-09-17T01:45Z	-0.76	false
2020-09-17T01:30Z	-0.722	false
2020-09-17T01:15Z	-0.671	false
2020-09-17T01:00Z	-0.617	false
2020-09-17T00:45Z	-0.567	false
2020-09-17T00:30Z	-0.527	false
2020-09-17T00:15Z	-0.498	false
2020-09-17T00:00Z	-0.472	false
2020-09-16T23:45Z	-0.458	false
2020-09-16T23:30Z	-0.492	false
2020-09-16T23:15Z	-0.54	false
2020-09-16T23:00Z	-0.566	false
2020-09-16T22:45Z	-0.577	false
2020-09-16T22:30Z	-0.501	false
2020-09-16T22:15Z	-0.377	false
2020-09-16T22:00Z	-0.258	false
2020-09-16T21:45Z	-0.094	false
2020-09-16T21:30Z	0.072	false
2020-09-16T21:15Z	0.239	false
2020-09-16T21:00Z	0.396	false
2020-09-16T20:45Z	0.575	false
2020-09-16T20:30Z	0.729	false
2020-09-16T20:15Z	0.853	false
2020-09-16T20:00Z	0.975	false
2020-09-16T19:45Z	1.073	false
2020-09-16T19:30Z	1.153	false
2020-09-16T19:15Z	1.226	false
2020-09-16T19:00Z	1.271	false
2020-09-16T18:45Z	1.306	false
2020-09-16T18:30Z	1.334	false
2020-09-16T18:15Z	1.34	false
2020-09-16T18:00Z	1.329	false
2020-09-16T17:45Z	1.318	false
2020-09-16T17:30Z	1.283	false
2020-09-16T17:15Z	1.229	false
2020-09-16T17:00Z	1.164	false
2020-09-16T16:45Z	1.077	false
2020-09-16T16:30Z	0.94	false
2020-09-16T16:15Z	0.765	false
2020-09-16T16:00Z	0.589	false
2020-09-16T15:45Z	0.402	false
2020-09-16T15:30Z	0.228	false
2020-09-16T15:15Z	0.07	false
2020-09-16T15:00Z	-0.091	false
2020-09-16T14:45Z	-0.24	false
2020-09-16T14:30Z	-0.34	false
2020-09-16T14:15Z	-0.39	false
2020-09-16T14:00Z	-0.407	false
2020-09-16T13:45Z	-0.398	false
2020-09-16T13:30Z	-0.372	false
2020-09-16T13:15Z	-0.352	false
2020-09-16T13:00Z	-0.324	false
2020-09-16T12:45Z	-0.311	false
2020-09-16T12:30Z	-0.306	false
2020-09-16T12:15Z	-0.311	false
2020-09-16T12:00Z	-0.307	false
2020-09-16T11:45Z	-0.306	false
2020-09-16T11:30Z	-0.314	false
2020-09-16T11:15Z	-0.359	false
2020-09-16T11:00Z	-0.425	false
2020-09-16T10:45Z	-0.492	false
2020-09-16T10:30Z	-0.515	false
2020-09-16T10:15Z	-0.491	false
2020-09-16T10:00Z	-0.405	false
2020-09-16T09:45Z	-0.3	false
2020-09-16T09:30Z	-0.163	false
2020-09-16T09:15Z	-0.039	false
2020-09-16T09:00Z	0.098	false
2020-09-16T08:45Z	0.235	false
2020-09-16T08:30Z	0.371	false
2020-09-16T08:15Z	0.5	false
2020-09-16T08:00Z	0.604	false
2020-09-16T07:45Z	0.704	false
2020-09-16T07:30Z	0.791	false
2020-09-16T07:15Z	0.866	false
2020-09-16T07:00Z	0.927	false
2020-09-16T06:45Z	0.963	false
2020-09-16T06:30Z	1	false
2020-09-16T06:15Z	1.019	false

Forecast data

Key information

• Station name: Portland
• Station ID: 3282
• Estuary/harbour: Dorset Coast
• Highest level on record: 2.02m on 14 February 2014
• Site datum: 0.00mAOD (what does this mean?)

How are tide levels in coastal and estuary areas measured?

Tide levels in coastal and estuary areas are shown in metres above mean sea level, or ordnance datum (mAOD).

Monitoring stations in these locations do have their own datum - a height in metres fixed relative to mean sea level. But, because of their location, these stations usually have the same datum as actual mean sea level. So it's expressed as zero metres.

How often are tide levels in coastal and estuary areas measured?

We use measuring stations like this one to collect water level data, usually once or twice a day. We collect data more frequently when there's a greater risk of flooding. That's why the graph might show a short time lag since the last measurement.

• View nearby measuring stations

• View the flood information service for England
• Check the long term flood risk for an area in England.

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