Flooding and land in West Itchenor
Figures last changed 22 October 2026. House prices for West Itchenor are on the main West Itchenor page.
- Flood zone 3
- 3 of 22
- postcodes; 0 more in zone 2
- Surface water
- 2 of 22
- high or medium risk within 25 m
- Rivers and sea, 2050s
- 3 → 4
- postcodes at high or medium risk, now then in the 2050s
- Flood warnings
- 11 days
- in the 10 years to June 2026
Does West Itchenor flood?
From rivers and the sea, parts of it can. Three of West Itchenor's 22 postcodes have their centre point inside Environment Agency flood zone 3, the highest band. These zones cover rivers and the sea only and ignore flood defences. Rain is a separate risk: on the Environment Agency's surface-water map (read 22 October 2026), 2 of the 22 postcodes (9%) have high or medium risk within 25 metres of their centre point. Groundwater isn't mapped in either, and a postcode is not a house: check an exact address on GOV.UK.
Source: Environment Agency Flood Map for Planning · Check an address for flood risk · What the flood zones leave out · New builds and Flood Re.
What locals say
- Locals don't know of the village flooding.
Will West Itchenor flood more in future?
A little more, on the Environment Agency's climate change scenario. Its long-term flood maps, unlike the flood zones above, count flood defences. From rivers and the sea, three of West Itchenor's 22 postcodes have their centre point at high or medium risk today, and four under the scenario, which runs to the 2050s with sea level rise to 2065; at high risk alone, two today and four then. From heavy rain, two have high or medium risk within 25 metres today, and two under the scenario. High risk means at least a 1 in 30 chance of flooding in any year, and medium means between 1 in 100 and 1 in 30. The maps were read on 22 October 2026.
Source: Environment Agency long-term flood risk maps, today and with climate change.
How often does West Itchenor get flood warnings?
The Environment Agency issued a flood warning for part of West Itchenor on eleven days in the ten years to June 2026, most recently on 30 March 2025. Three of its 22 postcodes sit inside the Agency's flood warning area "Bosham and West Itchenor" (Chichester Harbour), with warnings on eleven days. No severe flood warning, the level that means danger to life, was issued in that time. Flood alerts, the earlier message that flooding is possible, went out on 44 days in that time, most recently on 2 February 2026. Warnings cover flooding from rivers and the sea, and groundwater in a few places, not heavy rain on its own. Each count is of days on which a new warning or alert went out, so updates on an event already running are not counted again.
Source: Environment Agency Historic Flood Warnings · Environment Agency flood warning and alert areas (real-time flood-monitoring API) · Sign up for free flood warnings.
Is the coast at West Itchenor eroding?
Not where homes are, on current plans. The shoreline plan for the 5.2 km of coast within 500 metres of West Itchenor's postcodes is to hold the line, keeping the existing defences, through to 2105. None of its postcodes has its centre point in land the Environment Agency's erosion map expects to be lost by 2105, if that plan is carried out and with its higher central allowance for climate change.
Source: Environment Agency National Coastal Erosion Risk Map 2024.
Are there old landfill sites near West Itchenor?
None that the Environment Agency knows of: its record of historic landfill sites shows none within 500 metres of a West Itchenor postcode. The nearest is Stubcroft Farm, 1.7 km away, which took inert waste such as soil and rubble between 1980 and 1985. A historic landfill is an old tip with no environmental permit in force: one that closed before tips were licensed, or whose licence has since ended. The Agency says much of its record comes from a national survey in the early 1990s, so it may be incomplete, and some boundaries are only approximate. An old tip nearby does not by itself mean a problem; the council's contaminated land register, or a search on an exact address, says more.
Flooding and land in nearby places
- Birdham: Very little from rivers and the sea: none of its 58 postcodes is in flood zone 3; 18 (31%) have high or medium risk from heavy rain.
- Bosham: Parts of it can: ten of its 122 postcodes are in flood zone 3, and four more in zone 2; 39 (32%) have high or medium risk from heavy rain.
- Chidham and Hambrook: Parts of it can: one of its 80 postcodes is in flood zone 3, and one more in zone 2; 22 (28%) have high or medium risk from heavy rain.
- Southbourne: Parts of it can: nine of its 215 postcodes are in flood zone 3, and eight more in zone 2; 78 (36%) have high or medium risk from heavy rain.
Figures cover 22 postcodes in West Itchenor. How these figures are made.