Environment Agency065WAC401Solent and South Downs
Thorney Island to West Itchenor: flood history since 2012
The Environment Agency has issued 86 flood alerts for Thorney Island to West Itchenor since 17 Oct 2012, most often in February; the busiest year was 2014 (21).
Flood alerts only
The flood area
- Flood area
- Thorney Island to West Itchenor
- Code
- 065WAC401
- Environment Agency area
- Solent and South Downs
- County
- West Sussex
- River or sea
- Chichester Harbour
- First in the history
- 17 Oct 2012
- Latest in the history file
- 2 Feb 2026
- Current status
- check-for-flooding.service.gov.uk (the Environment Agency's live page)
Flood alert, flood warning, severe flood warning: what each means
Source: Environment Agency, Historic Flood Warnings (England); Environment Agency flood-monitoring API. Contains public sector information licensed under the Open Government Licence v3.0.
How many alerts and warnings a year?
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 | 2 | 0 | 0 |
| 2025 | 4 | 0 | 0 |
| 2024 | 6 | 0 | 0 |
| 2023 | 6 | 0 | 0 |
| 2022 | 4 | 0 | 0 |
| 2021 | 4 | 0 | 0 |
| 2020 | 6 | 0 | 0 |
| 2019 | 2 | 0 | 0 |
| 2018 | 4 | 0 | 0 |
| 2017 | 4 | 0 | 0 |
| 2016 | 5 | 0 | 0 |
| 2015 | 8 | 0 | 0 |
| 2014 | 21 | 0 | 0 |
| 2013 | 5 | 0 | 0 |
| 2012 | 5 | 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.
When in the year?
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.
Before July 2026: the latest in the history file
| Date | Level |
|---|---|
| 2 Feb 2026 | Flood alert |
| 8 Jan 2026 | Flood alert |
| 6 Dec 2025 | Flood alert |
| 4 Nov 2025 | Flood alert |
| 9 Sep 2025 | Flood alert |
| 30 Mar 2025 | Flood alert |
| 18 Dec 2024 | Flood alert |
| 16 Oct 2024 | Flood alert |
| 7 Apr 2024 | Flood alert |
| 28 Mar 2024 | Flood alert |
| 10 Mar 2024 | Flood alert |
| 8 Feb 2024 | Flood alert |
Source: Environment Agency, Historic Flood Warnings (England); Environment Agency flood-monitoring API. Contains public sector information licensed under the Open Government Licence v3.0.