Environment Agency065WAF423Solent and South Downs

Upper Arun: flood history since 2012

The Environment Agency has issued 45 flood alerts for Upper Arun since 12 Jun 2012, most often in January; the busiest year was 2020 (7).

Flood alerts only

The flood area

Flood area: Upper Arun
Code: 065WAF423
Environment Agency area: Solent and South Downs
County: Surrey, West Sussex
River or sea: Arun
First in the history: 12 Jun 2012
Latest in the history file: 14 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.

2020 was the busiest year for Upper Arun

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	4	0	0
2024	4	0	0
2023	3	0	0
2022	4	0	0
2021	3	0	0
2020	7	0	0
2019	1	0	0
2018	1	0	0
2016	4	0	0
2015	2	0	0
2014	5	0	0
2013	1	0	0
2012	2	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.