Marinas across the coast from East to West (South Coast) are being urged to check their policy cover for high tide loop holes. The tides for October 2025 are set to be the highest in more than 200 years according to weather specialists.
Sea levels along the UK's south coast are expected to rise significantly in the coming decades due to climate change, increasing the long-term risk of flooding and coastal erosion
. For current conditions, the UK government's flood warning service and the Met Office provide live updates on tidal flooding risks.
Long-term sea level projections
- Faster than average rise: In July 2025, the Met Office and the National Oceanography Centre released a report indicating that the UK's sea level is rising faster than the global average. Two-thirds of the sea level rise observed since 1900 has occurred in the last three decades.
- Glacial rebound: The geology of the UK contributes to the higher risk on the south coast. As the land in the north of the country continues to rise in a process called "glacial isostatic adjustment" following the last ice age, the south of England is slowly sinking. This land movement adds to the effects of rising sea levels.
- Increased flood frequency: The Marine Climate Change Impacts Partnership (MCCIP) reports that due to this mean sea level rise, extreme sea levels that exceed critical flood thresholds are being experienced more frequently than in the past.
- Greater coastal hazards: As sea levels continue to rise, the UK's risk of coastal flooding will only increase. According to the National Oceanography Centre, this will lead to a higher frequency of extreme sea levels and an intensification of coastal hazards.
Short-term and localized flood risks
For real-time flood information on the south coast and elsewhere, you can check the following official sources:
- Live flood map: The UK government provides a live flood map that displays current flood alerts, warnings, and the overall flood forecast for the next five days.
- Sign-up service: You can register for free flood warnings from the Environment Agency to receive alerts by phone, text, or email.
- Tide tables: For daily tidal patterns, including high and low tide times, the Met Office provides detailed tide tables.
Note: Always consult the official Met Office and GOV.UK websites for the most current and accurate flood risk information.