Environment Agency065WAC158Solent and South Downs

Portsmouth: flood history since 2011

The Environment Agency has issued 58 flood alerts for Portsmouth since 12 Dec 2011, most often in November; the busiest year was 2014 (13).

Flood alerts only

The flood area

Flood area: Portsmouth
Code: 065WAC158
Environment Agency area: Solent and South Downs
County: Portsmouth
River or sea: The Solent, Portsmouth Harbour, Langstone Harbour
First in the history: 12 Dec 2011
Latest in the history file: 8 Jan 2026
Current status: check-for-flooding.service.gov.uk (the Environment Agency's live page)

Source: Environment Agency, Historic Flood Warnings (England); Environment Agency flood-monitoring API. Contains public sector information licensed under the Open Government Licence v3.0.

2014 was the busiest year for Portsmouth

Flood alerts, flood warnings and severe flood warnings (updates not counted), by year. 2026 runs to the end of June.

The numbers

Year	Alerts	Warnings	Severe
2026	1	0	0
2025	5	0	0
2024	5	0	0
2023	3	0	0
2022	4	0	0
2021	1	0	0
2020	5	0	0
2019	4	0	0
2018	2	0	0
2017	2	0	0
2016	2	0	0
2015	1	0	0
2014	13	0	0
2013	6	0	0
2012	3	0	0
2011	1	0	0

Source: Environment Agency, Historic Flood Warnings (England); Environment Agency flood-monitoring API. Contains public sector information licensed under the Open Government Licence v3.0.

Most often in November

All alerts and warnings since 2011 by month.

Source: Environment Agency, Historic Flood Warnings (England); Environment Agency flood-monitoring API. Contains public sector information licensed under the Open Government Licence v3.0.

Source: Environment Agency, Historic Flood Warnings (England); Environment Agency flood-monitoring API. Contains public sector information licensed under the Open Government Licence v3.0.