Flood Alert Issued for River Itchen at Mansbridge and Riverside Park

Alert Details

The Environment Agency has issued a flood alert for the Solent and South Downs region, specifically targeting the River Itchen. The alert was raised on February 18, 2026, in response to rising river levels that pose a risk of flooding over the next two days.

Affected Areas

The primary areas at risk include Mansbridge and Riverside Park within the county of Hampshire and the city of Southampton. Specific locations identified as vulnerable include the access road and car parking areas near the White Swan Pub, the car garage at Mansbridge, and various sections of Riverside Park.

What You Should Do

Residents and business owners in the affected areas are advised to consider activating any available flood protection products. This includes deploying defenses around the White Swan pub, where water may be forced up through the floor. The Environment Agency is currently monitoring rainfall and river levels and is coordinating with Southampton City Council regarding the operation of Woodmill.

Expected Conditions

Flooding is possible due to the combination of persistent rainfall and high tide cycles. Water levels are expected to reach approximately 5.04 metres Chart Datum (2.30 mAOD). Forecasts indicate that up to 25mm of rain may fall through Thursday morning. If this rainfall significantly impacts the river, the flood risk and associated impacts are expected to increase.

Timeline

The alert is effective immediately, with high tides forecast for 23:45 on February 18, and 02:00 and 12:00 on February 19, 2026. Rainfall is predicted to continue until the morning of Thursday, February 19. The Environment Agency plans to provide an update on the situation by 18:00 on February 19, 2026.