Hayling Island flooding and flood risk
Figures last changed 2 November 2026. House prices for Hayling Island are on the main Hayling Island page.
- Flood zone 3
- 78 of 472
- postcodes; 28 more in zone 2
- Surface water
- 169 of 472
- high or medium risk within 25 m
- Rivers and sea, 2050s
- 37 → 99
- postcodes at high or medium risk, now then in the 2050s
- Flood warnings
- 13 days
- in the 10 years to June 2026
Does Hayling Island flood?
From rivers and the sea, parts of it can. 78 of Hayling Island's 472 postcodes have their centre point inside Environment Agency flood zone 3, the highest band, and 28 more sit in zone 2. 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 2 November 2026), 169 of the 472 postcodes (36%) 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.
Future flood risk in Hayling Island
Yes, noticeably 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, 37 of Hayling Island's 472 postcodes have their centre point at high or medium risk today, and 99 under the scenario, which runs to the 2050s with sea level rise to 2065; at high risk alone, 22 today and 69 then. From heavy rain, 169 have high or medium risk within 25 metres today, and 240 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 2 November 2026.
Source: Environment Agency long-term flood risk maps, today and with climate change.
How often does Hayling Island get flood warnings?
The Environment Agency issued a flood warning for part of Hayling Island on 13 days in the ten years to June 2026, most recently on 2 February 2026. 139 of its 472 postcodes sit inside five Agency flood warning areas: "South Hayling and South Eastoke seafront" (Langstone Harbour, The Solent), with warnings on eleven days; "South Hayling at Sinah Common, Westfield, Sea View and Mengham" (The Solent), on two; and "North and East Hayling at Northney, Tye and Selsmore" (Langstone Harbour), on two; and two more. 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 31 days in that time, most recently on 1 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 Hayling Island eroding?
Not where homes are, on current plans. The shoreline plan for the 35.2 km of coast within 500 metres of Hayling Island's postcodes, through to 2105: 29.7 km hold the line, 5.5 km no active intervention. 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 Hayling Island?
Yes. The Environment Agency's record of historic landfill sites shows eight within 500 metres of a Hayling Island postcode, and 48 of its 472 postcodes (10%) have their centre point on one or within 250 metres of it. The one closest to most postcodes is Part Of Camping Site, which took household waste (the record gives no dates). Others include North of Mengham House, Fleet Farm Caravan Park and Land West Of Old Railway, and four more. 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
- Havant: Parts of it can: 30 of its 369 postcodes are in flood zone 3, and 22 more in zone 2; 196 (53%) 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.
- Emsworth: Parts of it can: seven of its 300 postcodes are in flood zone 3, and seven more in zone 2; 90 (30%) have high or medium risk from heavy rain.
- West Wittering: Parts of it can: eleven of its 98 postcodes are in flood zone 3, and eleven more in zone 2; 25 (26%) have high or medium risk from heavy rain.
Figures cover 472 postcodes in Hayling Island. How these figures are made.