Environment Agency065WAF113Solent and South Downs

River Blackwater: flood history since 2012

The Environment Agency has issued 105 flood alerts for River Blackwater since 25 Apr 2012, most often in January; the busiest year was 2014 (14).

Flood alerts only

The flood area

Flood area: River Blackwater
Code: 065WAF113
Environment Agency area: Solent and South Downs
County: Hampshire, Wiltshire
River or sea: River Blackwater
First in the history: 25 Apr 2012
Latest in the history file: 1 Feb 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 River Blackwater

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	4	0	0
2025	5	0	0
2024	12	0	0
2023	11	0	0
2022	7	0	0
2021	3	0	0
2020	9	0	0
2019	5	0	0
2018	1	0	0
2017	2	0	0
2016	10	0	0
2015	2	0	0
2014	14	0	0
2013	11	0	0
2012	9	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 January

All alerts and warnings since 2012 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.