| The River Lavant within Chichester City Centre, including Whyke, the A285, A286, and Chichester College | River Lavant | Warning |
| The River Lavant from Mid Lavant to Shopwhyke including Chichester | River Lavant | Alert |
| Areas of Shoreham at risk from a high tide including Eastern parts of North and South Lancing, Broadway and Willowbrook caravan parks, Adur recreation ground, Old Shoreham Road, Beach Green and Aldrington Basin | English Channel | Alert |
| Coastal areas of Selsey Bill, including West Street, Clayton Road, Warner Road, Marine Gardens, Kingsway, East Beach Road, East Beach and Church Norton | English Channel | Warning |
| Coastal areas between Selsey Bill and Elmer, including Pagham, Sidlesham and Bognor | English Channel | Alert |
| Coastal areas of Climping | English Channel | Alert |
| The River Arun at Amberley, including Bury, Houghton Bridge, and South Stoke | River Arun | Warning |
| The Rivers Arun, Chilt, Stor and Tortington Stream | Arun | Alert |
| Scrase Bridge Stream & West Common Stream at Haywards Heath and Lindfield | Scrase Bridge Stream, West Common Stream | Alert |
| Ferring Rife from the A259 at Northbrook College to Ferring Beach | Ferring Rife | Alert |
| Bosham Stream from West Ashling to Bosham including Churchfield Stream | Bosham Stream | Alert |
| Communities at risk of groundwater flooding to the north of Chichester, including West Dean, Singleton, Charlton, East Dean and Chilgrove | Groundwater | Alert |
| Elbridge, Lidsey, Aldingbourne, Barnham, Yapton and Ryebank Rifes | Aldingbourne and Barnham Rifes | Alert |
| Tidal areas of Littlehampton Ropewalk | Littlehampton Harbour | Warning |
| Rope Walk, Ferry and Bridge Road on the west banks of the lower tidal River Arun at Littlehampton | Littlehampton Harbour | Alert |
| The River Lavant at Mid Lavant and East Lavant | River Lavant | Warning |
| Coastal areas of Rustington to Shoreham fort including Ferring, Worthing, Lancing and Shoreham Beach | English Channel | Alert |
| Coastal areas between West Wittering and Medmerry, including Bracklesham Drive, caravan parks, West Sands, Selsey Country Club and Ferry Farm | The Solent, English Channel | Alert |
| Beach front areas of Shoreham Beach | English Channel | Warning |
| The Black Ditch along River Road in Angmering | Black Ditch | Warning |
| The Black Ditch through Angmering, Lyminster and Wick | Black Ditch | Alert |
| The River Arun from Broadbridge Heath to Pallingham Quay, including Broadbridge Heath, Slinfold, Wanford Mill, Gibbons Mill, Newbridge, and Pallingham Lock | River Arun | Warning |
| Coastal areas of Bosham and West Itchenor, including Chidham, Broadbridge, and Bosham Hoe | Chichester Harbour | Warning |
| Coastal areas between Thorney Island and West Itchenor, including Prinsted, Nutbourne, Chidham, Bosham, Bosham Hoe, Dell Quay, Salterns and Ellanore Lane | Chichester Harbour | Alert |
| Coastal areas of Pagham | English Channel | Warning |
| The West Sussex River Rother at Fittleworth | West Sussex River Rother | Warning |
| Scrase Bridge Stream at Lindfield including the West Common Stream | Scrase Bridge Stream, West Common Stream | Warning |
| The Lower Adur and tributaries from Henfield to Shoreham-by-Sea | Adur | Alert |
| Ifield Brook and the River Mole at Ifield and the River Mole at Lowfield Heath including Gatwick Airport, West Sussex | Ifield Brook, River Mole | Warning |
| The River Adur at Upper Beeding and Bramber, including Newbrook Farm, and Beeding Manor | Adur | Warning |
| Tidal areas of Shoreham Harbour including Brighton Road, houseboats, Shoreham Harbour and areas north of the A27 | English Channel | Warning |
| Tidal areas of Shoreham Harbour including Brighton Road, houseboats, Shoreham Harbour and areas north of the A27 | English Channel | Alert |
| Tidal areas of Littlehampton East Bank from the East pier to the A259 | Littlehampton Harbour | Alert |
| The River Arun at Arundel, including Warningcamp, and Burpham | River Arun | Warning |
| The Aldingbourne Rife at Bersted, including Addison Way, Riverside Caravan Park, and the South Bersted industrial estate | Aldingbourne Rife | Warning |
| Coastal areas of West Wittering and East Wittering, between Cakeham Road, Stocks Road and the sea. Including West Strand, East Strand, Marine Drive, Marine Close, Tamarisk Walk, and West Bracklesham Drive | Chichester Harbour, The Solent, English Channel | Warning |
| The Bosham Stream at Bosham, including the Old Bosham Ditch, Shore Road, and Churchfield Stream | Bosham Stream | Warning |
| Tidal areas of Littlehampton East Bank including Caffyn's Field, and Riverside Industrial Estate | Littlehampton Harbour | Warning |
| The River Adur West Branch and tributaries from Coolham to Bines Green | Adur | Alert |
| Coastal areas of Bognor, including Felpham, South Bersted, North Bersted and Shripney | English Channel | Warning |
| The River Lavant at Westhampnett, including Church Farm pit, the A27, and the Supermarket retail park at Portfield Way | River Lavant | Warning |
| The Black Ditch and Eels Springs Ditch at Lyminster and Wick, including Thornlea park and Falcon Gardens | Black Ditch | Warning |
| The River Arun at Pulborough, including Greatham Bridge | River Arun | Warning |
| The Barnham Rife at Barnham, including the B2233, Lake Lane, Orchard Way, and Downview Road | Barnham Rife | Warning |
| The Ferring Rife at Ferring, including Goring, the A259 at Northbrook College, Ferring Lane, Highdown Way, Langbury Lane, Downview Avenue, Onslow and Brook Lane Caravan Parks | Ferring Rife | Warning |
| Coastal areas of Sidlesham | English Channel | Warning |
| Coastal areas of Rustington, Ferring, Worthing and Lancing | English Channel | Warning |
| Sussex River Ouse at Lindfield Bridge including Pims Lock | Sussex River Ouse | Warning |
| Gatwick Stream at Maidenbower and Crawley including Tinsley Green, West Sussex | Gatwick Stream | Warning |
| Coastal areas of Medmerry beach, including the West Sands caravan park | The Solent, English Channel | Warning |
| Areas of Shoreham at risk including the High Street, Old Shoreham Road, Shoreham Airport, Riverside Road, Beach Green, Eastern parts of North and South Lancing, Broadway and Willowbrook caravan parks, Adur recreation ground and Aldrington Basin | English Channel | Warning |
| The River Arun at Ford and Climping | River Arun | Warning |
| The Aldingbourne and Lidsey Rifes at Felpham, including the Whitfield Close, the A259, Links Avenue, and Butlins Holiday Centre | Aldingbourne and Lidsey Rifes | Warning |
| The River Arun at Horsham, from Amiesmill Bridge to Hills Farm Lane, including Millbay Lane, Tanbridge Park, Arunside, and Ridgehurst Drive | River Arun | Warning |
| Coast at Bracklesham, including East Bracklesham Drive, Tideway, Bracklesham Caravan and Boat Park, and Medmerry Park. | The Solent, English Channel | Warning |
| Coastal areas of Climping, including Poole Place | English Channel | Warning |
| The West Sussex River Rother from Lodsbridge to Shopham Bridge, including Lodsbridge at Selham, Coultershaw Bridge, and Shopham Bridge | West Sussex River Rother | Warning |
| Sussex River Ouse and tributaries from Slaugham to Ardingly including the Shell Brook | Sussex River Ouse | Warning |
| The River Adur West Branch, at Coolham and Shipley | Adur | Warning |
| Coastal areas of Elmer | English Channel | Warning |
| Coastal areas of Thorney Island, Southbourne and Nutbourne | Chichester Harbour | Warning |
| River Road, Arundel, near Tarrant Wharf and Arun Street | River Arun | Warning |
| River Road, Arundel, near Tarrant Wharf and Arun Street | River Arun | Alert |
| Mock Bridge to Betley Bridge, near Shermanbury on the River Adur | River Adur | Warning |
| Tilgate Brook at Tilgate and Furnace Green | Tilgate Brook | Warning |
| South Pond, South Street and The Wharf, Midhurst | Western Rother | Warning |
| Areas at risk of groundwater flooding in in East Dean, Charlton, Singleton, West Dean and Chilgrove | Groundwater | Warning |
| Boldings Brook in Horsham including Warnham Mill, Redford Avenue, Merryfield Drive, Irwin Drive, Hills Farm Lane, River Walk. | Boldings Brook | Warning |
| Areas at risk of groundwater flooding on the upper River Ems, including Stoughton, Walderton and Walderton Bridge | Groundwater | Warning |
| Areas at risk of groundwater flooding on the upper River Ems at Compton, West Marden, Stoughton, Walderton and Racton | Groundwater | Alert |