Slot swells
Coasts behind islands only get swell from a few directions. A slot is a narrow gap between islands or shallow banks that lines up with the open ocean. When a storm sits in exactly that line, its swell threads the gap and a stretch of coast that is usually flat lights up, sometimes once in years. SwellFeed maps every slot below from coastline and seafloor data, and its Strike Missions flag a storm the moment it lines up with one.
Providence Channel
Florida AtlanticA strong hurricane east-southeast of the Bahamas, moving west-northwest, lines its swell up with the deep channel between the Little and Great Bahama Banks.
Hurricane Isabel, September 2003: swell ran through the Providence Channel onto a 10-mile stretch of coast and peaked at 14 ft at Delray Beach. Source
- Reef RoadPalm Beach & Jupiter, Florida Atlantic109.8° ESEstorm 360+ km out
- South Palm BeachPalm Beach County, Florida Atlantic106.8° ESEstorm 358+ km out
- Boynton InletPalm Beach County, Florida Atlantic106° ESEstorm 352+ km out
- Delray BeachMiami–Delray, Florida Atlantic104° ESEstorm 356+ km out
- Highland BeachPalm Beach County, Florida Atlantic102.8° ESEstorm 352+ km out
- Boca Raton InletBoca Raton, Florida Atlantic101.2° ESEstorm 284+ km out
- Deerfield BeachMiami–Delray, Florida Atlantic100.5° Estorm 284+ km out
Alenuihaha Channel
Hawaii- NahaMaui County, Hawaii116.2° ESEstorm 122+ km out
- Hulopoʻe BeachMaui County, Hawaii107.2° ESEstorm 52+ km out
Anacapa Passage
Southern California- Santa BarbaraSanta Barbara, Southern California156.8° SSEstorm 46+ km out
- Rincon PointVentura & Santa Barbara, Southern California177° Sstorm 124+ km out
- Rincon PointVentura & Santa Barbara, Southern California185° Sstorm 118+ km out
- Ventura PointVentura & Santa Barbara, Southern California209.5° SSWstorm 36+ km out
Anegada Passage
Puerto Rico & Caribbean- Playa BlancaDaguao, Puerto Rico & Caribbean84° Estorm 100+ km out
- Balneario Público de HumacaoBarriada Obrera, Puerto Rico & Caribbean80.5° Estorm 110+ km out
Bass Strait
Australia- WinkipopTorquay, Australia129.2° SEstorm 408+ km out
- WinkipopTorquay, Australia180° Sstorm 282+ km out
- Bells BeachBells Beach, Australia129.2° SEstorm 408+ km out
- Bells BeachBells Beach, Australia180° Sstorm 290+ km out
- Woolamai, Phillip IslandAustralia135.2° SEstorm 338+ km out
English Channel
Netherlands & Belgium- ZeebruggeZeebrugge, Netherlands & Belgium249.2° WSWstorm 420+ km out
- BlankenbergeBlankenberge, Netherlands & Belgium249.8° WSWstorm 414+ km out
Kaiwi Channel
Hawaii- Mākoleʻā BeachMahaiula, Hawaii318.8° NWstorm 254+ km out
- Wawaloli BeachKēahole, Hawaii320.2° NWstorm 258+ km out
- ʻAlula BeachKailua, Hawaii320.2° NWstorm 262+ km out
- Banyans, Hawai‘i IslandHawaii Island, Hawaii320.8° NWstorm 272+ km out
- White Sands BeachKahaluʻu, Hawaii320.8° NWstorm 274+ km out
- Mākoleʻā BeachKahaluʻu, Hawaii321.2° NWstorm 306+ km out
- Keʻei BeachHonaunau-Napoopoo, Hawaii322° NWstorm 286+ km out
- Keālia BeachHo‘okena, Hawaii322.8° NWstorm 298+ km out
- Kalāhiki BeachHo‘okena, Hawaii322.8° NWstorm 298+ km out
Kalohi Channel
Hawaii- KaanapaliKaanapali, Hawaii279.5° Wstorm 370+ km out
Kauai Channel
Hawaii- Keʻei BeachHonaunau-Napoopoo, Hawaii312.8° NWstorm 468+ km out
- Keālia BeachHo‘okena, Hawaii313.2° NWstorm 474+ km out
- Kalāhiki BeachHo‘okena, Hawaii313.5° NWstorm 472+ km out
Mona Passage
Puerto Rico & Caribbean- Wilderness, AguadillaRincón & Aguadilla, Puerto Rico & Caribbean247.8° WSWstorm 150+ km out
- Playa EspinarAguada, Puerto Rico & Caribbean251.2° WSWstorm 148+ km out
- Pico PiedraAguada, Puerto Rico & Caribbean251.2° WSWstorm 144+ km out
- Tres PalmasRincón, Puerto Rico & Caribbean254.5° WSWstorm 136+ km out
- Playa CorcegaRincón, Puerto Rico & Caribbean256.5° WSWstorm 454+ km out
- Balnearin de AñascoPlaya, Puerto Rico & Caribbean259.5° Wstorm 456+ km out
- Playa La PuenteMayagüez, Puerto Rico & Caribbean260.5° Wstorm 460+ km out
- Playa del MarMayagüez, Puerto Rico & Caribbean261.2° Wstorm 456+ km out
Pailolo Channel
Hawaii- Fagans BeachMaui County, Hawaii189.8° Sstorm 38+ km out
Sagami Bay mouth
Japan- Hiratsuka BeachHiratsuka, Japan181.2° Sstorm 180+ km out
San Miguel Passage
Southern California- Campus PointSanta Barbara, Southern California224.2° SWstorm 58+ km out
San Pedro Channel
Southern California- Trancas BeachMalibu, Southern California159.2° SSEstorm 138+ km out
- Seal BeachOrange County, Southern California244° WSWstorm 134+ km out
- Surfside BeachSeal Beach, Southern California244.8° WSWstorm 134+ km out
- White Point BeachLos Angeles, Southern California236° SWstorm 114+ km out
- Cabrillo BeachLos Angeles, Southern California239° WSWstorm 118+ km out
- Laguna BeachSouthern California275.8° Wstorm 216+ km out
- Arch BeachLaguna Beach, Southern California276.5° Wstorm 218+ km out
- Aliso BeachLaguna Beach, Southern California277° Wstorm 220+ km out
- Salt Creek BeachDana Point, Southern California278° Wstorm 222+ km out
- Capistrano BeachDana Point, Southern California279° Wstorm 228+ km out
- Poche BeachDana Point, Southern California280° Wstorm 232+ km out
- San ClementeOrange County & San Clemente, Southern California280.5° Wstorm 236+ km out
- Lower TrestlesOrange County & San Clemente, Southern California282.5° WNWstorm 238+ km out
- San OnofreOrange County & San Clemente, Southern California282.5° WNWstorm 240+ km out
Santa Barbara Channel
Mexico, Southern California- Gaviota BeachGaviota, Southern California150.2° SSEstorm 150+ km out
- Gaviota BeachGaviota, Southern California186.8° Sstorm 48+ km out
- Refugio BeachSanta Barbara County, Southern California166.5° SSEstorm 54+ km out
- Refugio BeachSanta Barbara County, Southern California202.5° SSWstorm 52+ km out
- El Capitan BeachSanta Barbara County, Southern California169.5° Sstorm 54+ km out
- El Capitan BeachSanta Barbara County, Southern California205.2° SSWstorm 52+ km out
- More Mesa BeachIsla Vista, Southern California226.5° SWstorm 62+ km out
- Hope Ranch Private BeachHope Ranch, Southern California228° SWstorm 62+ km out
- Hendrys BeachSanta Barbara, Southern California230.2° SWstorm 64+ km out
- La Conchita BeachLa Conchita, Southern California177.2° Sstorm 124+ km out
- La Conchita BeachLa Conchita, Southern California185.2° Sstorm 120+ km out
- Oil Piers BeachSea Cliff, Southern California189° Sstorm 116+ km out
- Ventura City BeachVentura, Southern California214° SWstorm 36+ km out
- South Jetty BeachVentura, Southern California215.2° SWstorm 34+ km out
- Hollywood BeachOxnard Beach, Southern California199.5° SSWstorm 102+ km out
- Hollywood BeachOxnard Beach, Southern California231.5° SWstorm 32+ km out
- Silver Strand BeachSilver Strand, Southern California243.5° WSWstorm 32+ km out
- K-38Rosarito, Mexico302.8° WNWstorm 376+ km out
Strait of Bonifacio
Mediterranean- OstiaRoma, Mediterranean261.8° Wstorm 254+ km out
Island gap
Australia- Mackay Harbour BeachMackay, Australia350.2° Nstorm 190+ km out
Canary Islands gap
Canary Islands- Guia de IsoraPlaya San Juan, Canary Islands285.2° WNWstorm 102+ km out
- Callao SalvajePlaya de Ajabo, Canary Islands289.8° WNWstorm 106+ km out
- La CaletaCosta Adeje, Canary Islands291.8° WNWstorm 110+ km out
- Playa del DuqueEl Beril, Canary Islands292° WNWstorm 112+ km out
- Costa AdejePlaya La Pinta, Canary Islands292.8° WNWstorm 114+ km out
- MogánPlaya de Puerto Rico, Canary Islands277.5° Wstorm 212+ km out
- ArguineguinPlaya de El Perchel, Canary Islands278.5° Wstorm 216+ km out
Gap beside El Hierro
Canary Islands- La CaletaCosta Adeje, Canary Islands259° Wstorm 114+ km out
- Playa del DuqueEl Beril, Canary Islands259.8° Wstorm 116+ km out
- Costa AdejePlaya La Pinta, Canary Islands261° Wstorm 114+ km out
- Playa de TroyaLas Americas, Canary Islands262.5° Wstorm 116+ km out
- Puerto Rico de Gran CanariaPlaya de Amadores, Canary Islands277.2° Wstorm 212+ km out
- San Bartolomé de Tirajanalas Palmas, Canary Islands278.5° Wstorm 228+ km out
Gap beside Fuerteventura
Canary Islands- Costa TeguiseLanzarote, Canary Islands206° SSWstorm 598+ km out
Gap beside Tenerife
Canary Islands- El QuemaoLa Santa, Canary Islands244.8° WSWstorm 302+ km out
- YaizaPlaya Blanca, Canary Islands250.8° WSWstorm 278+ km out
- The Bubble, FuerteventuraEl Hierro, Majanicho, Canary Islands251° WSWstorm 264+ km out
Gap between Gran Canaria and Tenerife
Canary Islands- LanzaroteIsla de la Graciosa, Canary Islands243.2° WSWstorm 320+ km out
Gap between Lanzarote and Gran Canaria
Canary Islands- LanzaroteIsla de la Graciosa, Canary Islands228.8° SWstorm 236+ km out
Gap between Tenerife and La Palma
Canary Islands- LanzaroteIsla de la Graciosa, Canary Islands257° WSWstorm 426+ km out
- El QuemaoLa Santa, Canary Islands258.8° Wstorm 410+ km out
Island gap
France- DieppeDieppe, France268.8° Wstorm 446+ km out
- PourvillePourville, France268.8° Wstorm 526+ km out
- Sainte-Marguerite-sur-MerSainte-Marguerite-sur-Mer, France268.8° Wstorm 522+ km out
- QuibervilleQuiberville, France269° Wstorm 436+ km out
- Saint-Valery-en-CauxSaint-Valery-en-Caux, France269.2° Wstorm 506+ km out
- La-HagueLa-Hague, France274.8° Wstorm 310+ km out
Island gap
Hawaii- Oneloa BeachKanahena, Hawaii277.5° Wstorm 54+ km out
Maldives gap
Indian Ocean- Lohis Surf PointHudhuranfushi, Indian Ocean149.5° SSEstorm 12+ km out
Gap beside Siberut
Indonesia- Lagundri Bay, NiasTeluk Dalam, Indonesia158.8° SSEstorm 214+ km out
Izu Islands gap
Japan- Atagawa Katase BeachHigashiizu, Japan168.2° SSEstorm 54+ km out
- Shirahama Chuo BeachShimoda, Japan152.2° SSEstorm 46+ km out
- Shirahama Chuo BeachShimoda, Japan162.2° SSEstorm 184+ km out
- Sotoura BeachShimoda, Japan132.8° SEstorm 40+ km out
- ShimodaTsumekizaki Beach, Japan151.2° SSEstorm 188+ km out
Gap beside Corsica
Mediterranean- Recco BeachGenova, Mediterranean164.5° SSEstorm 154+ km out
Gap beside Santiago
Morocco & West Africa- Cape VerdePraia da Cruz, Morocco & West Africa199.8° SSWstorm 142+ km out
Gap between Santiago and Fogo
Morocco & West Africa- Cape VerdePraia da Cruz, Morocco & West Africa223.8° SWstorm 204+ km out
Island gap
New England- Pemaquid BeachNew Harbor, New England100.2° Estorm 316+ km out
- Pemaquid PointBristol, New England97.5° Estorm 314+ km out
- Bank Street BeachHarwich, New England110.2° ESEstorm 8+ km out
- Bank Street BeachHarwich, New England163.2° SSEstorm 40+ km out
- Inman Road BeachDennis, New England101.5° ESEstorm 12+ km out
- Haigis BeachDennis, New England97.5° Estorm 14+ km out
- Bass River BeachYarmouth, New England96.8° Estorm 16+ km out
- Horseneck BeachWestport, New England131.2° SEstorm 32+ km out
- East Horseneck BeachWestport, New England137.2° SEstorm 28+ km out
- Easton’s Beach, NewportNew England115.5° ESEstorm 44+ km out
- Quoquasset InletNewport County, New England122° ESEstorm 34+ km out
- Fenway BeachWesterly, New England102° ESEstorm 78+ km out
- WesterlyRhodes Island, New England100.8° Estorm 80+ km out
- Ocean House BeachWesterly, New England96.8° Estorm 84+ km out
- Squibnocket BeachChilmark, New England75.8° ENEstorm 62+ km out
Island gap
New York- Atlantic Avenue BeachAmagansett, New York72.8° ENEstorm 180+ km out
- Main BeachEast Hampton, New York72.2° ENEstorm 186+ km out
- Georgica BeachEast Hampton, New York72.2° ENEstorm 188+ km out
- Wainscott BeachTown of East Hampton, New York72° ENEstorm 190+ km out
- W. Scott Cameron BeachBridgehampton, New York71.8° ENEstorm 196+ km out
Silver Bank gap
Puerto Rico & Caribbean- EncuentroCabarete, Puerto Rico & Caribbean69.5° ENEstorm 166+ km out
- Bozo BeachCabarete, Puerto Rico & Caribbean67.5° ENEstorm 158+ km out
Gap beside Lesser Antilles
Puerto Rico & Caribbean- Playa Puerto RealBarrio Pueblo, Puerto Rico & Caribbean106.8° ESEstorm 258+ km out
- Playa Puerto RealBarrio Pueblo, Puerto Rico & Caribbean113.8° ESEstorm 376+ km out
- Playa TortugaFraile, Puerto Rico & Caribbean106.8° ESEstorm 382+ km out
- Playa ManzanillaFraile, Puerto Rico & Caribbean124.8° SEstorm 500+ km out
- Playa DineroCulebra, Puerto Rico & Caribbean114.2° ESEstorm 340+ km out
- Playa DineroCulebra, Puerto Rico & Caribbean124.8° SEstorm 500+ km out
- Blue BeachPuerto Ferro, Puerto Rico & Caribbean110.5° ESEstorm 314+ km out
Island gap
Puerto Rico & Caribbean- Playa FlamencoCulebra, Puerto Rico & Caribbean231° SWstorm 64+ km out
- Luis Pena BeachCulebra, Puerto Rico & Caribbean231.5° SWstorm 64+ km out
Channel Islands gap
Southern California- County LineLos Angeles & Malibu, Southern California153.8° SSEstorm 144+ km out
- Yerba Buena BeachOld Malibu, Southern California153.8° SSEstorm 144+ km out
- Encinal BeachMalibu, Southern California157° SSEstorm 140+ km out
- Newport BeachOrange County & San Clemente, Southern California226.2° SWstorm 86+ km out
- The WedgeNewport Beach, Southern California231.5° SWstorm 88+ km out
- Laguna BeachSouthern California238.2° WSWstorm 92+ km out
- Arch BeachLaguna Beach, Southern California240.2° WSWstorm 92+ km out
- Aliso BeachLaguna Beach, Southern California242.2° WSWstorm 92+ km out
- Salt Creek BeachDana Point, Southern California244.8° WSWstorm 92+ km out
- Capistrano BeachDana Point, Southern California249° WSWstorm 96+ km out
- Ribbon BeachLos Angeles County, Southern California268° Wstorm 86+ km out
- Ribbon BeachLos Angeles County, Southern California286° WNWstorm 148+ km out
- Poche BeachDana Point, Southern California251° WSWstorm 96+ km out
- San ClementeOrange County & San Clemente, Southern California253° WSWstorm 98+ km out
- Lower TrestlesOrange County & San Clemente, Southern California257° WSWstorm 100+ km out
- San OnofreOrange County & San Clemente, Southern California257.2° WSWstorm 100+ km out
- Pacific BeachSan Diego, Southern California290.5° WNWstorm 216+ km out
- Ocean Beach, San DiegoSan Diego County, Southern California292° WNWstorm 218+ km out
- Sunset CliffsSan Diego County, Southern California292.8° WNWstorm 294+ km out
- Imperial BeachSan Diego County, Southern California295.5° WNWstorm 310+ km out
Babuyan Islands gap
Taiwan- Qijin BeachTaiwan149.5° SSEstorm 302+ km out