Sea level rise (UK)
Annual mean sea level at Newlyn, Cornwall (UK's longest tide gauge record) relative to the 1981–2010 baseline, in millimetres.
80 mm
-43.7% vs 2024
As of 2025
Historical trend
Trend summary
Sea level rise (UK) was 80 mm in 2025, down from 142 mm in 2024.
Trend
- Over the available record (1950–2025), it has ranged from -162 mm in 1959 to 142 mm in 2024.
- The latest reading is above the record average of -18 mm.
Context
- Newlyn, Cornwall (PSMSL station 9) has the longest continuous UK tide gauge record, beginning in 1915.
- Relative sea level as measured by a coastal tide gauge reflects both absolute sea level change and local land movement; Newlyn is in an area of very slight land subsidence.
Generated from the published series — describes direction, magnitude and range only, with no editorial judgement or forecasts.