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Triathlon Atlas
Hundreds of swimmers in the first metres of an ocean swim start

Guide

Water temperature of 225 triathlons

225 of the 354 races on the calendar have an average water temperature. They run from 13 °C to 29 °C.

Filter races by water temperature
A swimmer in a white cap and wetsuit mid-stroke

The figure

What the average describes

Each race's average water temperature is an expectation drawn from previous editions.

Wetsuit legality is decided on the morning of the race against the temperature actually measured, which can sit a few degrees either side.

Every race with an average water figure

Coldest first. Sort by any column. Free to cite with a link.

225 races · figures last updated 8 Nov 2026

Race
Escape From Alcatraz Triathlon San FranciscoUnited StatesT100Custom format6 Jun 2027Bay13 °C
ICON Livigno Xtreme Triathlon LivignoItalyXTRIFull3 Sept 2027Lake14 °C
IRONMAN 70.3 La Quinta La QuintaUnited StatesIRONMANMiddle6 Dec 2026Lake14 °C
IRONMAN Valdivia ValdiviaChileIRONMANFull29 Nov 2026River14 °C
BLACKLAKE Xtreme Triathlon ŽabljakMontenegroXTRIFull11 Sept 2027Lake15 °C
BLACKLAKE XTRI Solo Point Five ŽabljakMontenegroXTRIMiddle9 Sept 2027Lake15 °C
CELTMAN! XTRI Solo Point Five ShieldaigUnited KingdomXTRIMiddle19 Jun 2027Sea15 °C
Swedeman Xtreme Triathlon TännforsenSwedenXTRIFull10 Jul 2027Lake15 °C
Swedeman XTRI Solo Point Five TännforsenSwedenXTRIMiddle8 Jul 2027Lake15 °C
Challenge Wānaka WānakaNew ZealandChallenge Family100 km20 Feb 2027Lake16 °C
IRONMAN 70.3 Oceanside OceansideUnited StatesIRONMANMiddle3 Apr 2027Bay16 °C
IRONMAN 70.3 Puerto Varas Puerto VarasChileIRONMANMiddle4 Apr 2027Lake16 °C
IRONMAN 70.3 Swansea Swansea BayUnited KingdomIRONMANMiddle11 Jul 2027Harbour16 °C
IRONMAN 70.3 Valdivia ValdiviaChileIRONMANMiddle29 Nov 2026River16 °C
IRONMAN 70.3 Vilamoura-Algarve VilamouraPortugalIRONMANMiddle3 Apr 2027Ocean16 °C
JBL Triathlon Sieraków 1/2 SierakówPolandIndependentMiddle29 May 2027Lake16 °C
The Championship ŠamorínSlovakiaChallenge Family100 km23 May 2027Canal16 °C
5150 Coquimbo CoquimboChileIRONMANOlympic3 Oct 2027Ocean17 °C
Challenge Canberra CanberraAustraliaChallenge Family100 km22 Nov 2026Lake17 °C
Challenge Gdańsk GdańskPolandChallenge Family100 km20 Jun 2027Sea17 °C
IRONMAN 70.3 Alcúdia-Mallorca AlcúdiaSpainIRONMANMiddle8 May 2027Ocean17 °C
IRONMAN 70.3 Boulder BoulderUnited StatesIRONMANMiddle12 Jun 2027Reservoir17 °C
IRONMAN 70.3 Elsinore ElsinoreDenmarkIRONMANMiddle27 Jun 2027Bay17 °C
IRONMAN 70.3 Mont-Tremblant Mont-TremblantCanadaIRONMANMiddle20 Jun 2027Lake17 °C
IRONMAN 70.3 Portugal-Cascais CascaisPortugalIRONMANMiddle23 Oct 2027Bay17 °C
IRONMAN 70.3 Santa Cruz Santa CruzUnited StatesIRONMANMiddle12 Sept 2027Ocean17 °C
IRONMAN 70.3 Switzerland Rapperswil-JonaSwitzerlandIRONMANMiddle6 Jun 2027Lake17 °C
IRONMAN 70.3 Venice-Jesolo JesoloItalyIRONMANMiddle24 Apr 2027Sea17 °C
IRONMAN 70.3 Westfriesland HoornNetherlandsIRONMANMiddle20 Jun 2027Lake17 °C
IRONMAN 70.3 Weymouth WeymouthUnited KingdomIRONMANMiddle12 Sept 2027Sea17 °C
IRONMAN 70.3 Zell am See-Kaprun Zell am SeeAustriaIRONMANMiddle29 Aug 2027Lake17 °C
IRONMAN Portugal-Cascais CascaisPortugalIRONMANFull23 Oct 2027Bay17 °C
IRONMAN Switzerland Thun ThunSwitzerlandIRONMANFull4 Jul 2027Lake17 °C
IRONMAN Wales PembrokeshireUnited KingdomIRONMANFull19 Sept 2027Bay17 °C
Triathlon de l'Alpe d'Huez L Alpe d'HuezFranceIndependentCustom format28 Jul 2027Lake17 °C
5150 Mont-Tremblant Mont-TremblantCanadaIRONMANOlympic19 Jun 2027Lake18 °C
Challenge Cesenatico CesenaticoItalyChallenge Family100 km16 May 2027Sea18 °C
Challenge Salou-Costa Daurada SalouSpainChallenge Family100 km9 May 2027Sea18 °C
IRONMAN 70.3 Aix-en-Provence Aix en ProvenceFranceIRONMANMiddle23 May 2027Lake18 °C
IRONMAN 70.3 Alghero AlgheroItalyIRONMANMiddle30 May 2027Ocean18 °C
IRONMAN 70.3 Geelong GeelongAustraliaIRONMANMiddle21 Mar 2027Bay18 °C
IRONMAN 70.3 Lake George Lake GeorgeUnited StatesIRONMANMiddle13 Jun 2027Lake18 °C
IRONMAN 70.3 Melbourne St. KildaAustraliaIRONMANMiddle8 Nov 2026Bay18 °C
IRONMAN 70.3 New York Jones BeachUnited StatesIRONMANMiddle24 Oct 2026Bay18 °C
IRONMAN 70.3 Oregon SalemUnited StatesIRONMANMiddle18 Jul 2027River18 °C
IRONMAN 70.3 Poreč PorecCroatiaIRONMANMiddle17 Oct 2027Ocean18 °C
IRONMAN 70.3 Ruidoso New Mexico RuidosoUnited StatesIRONMANMiddle11 Jul 2027Lake18 °C
IRONMAN 70.3 Tallinn TallinnEstoniaIRONMANMiddle8 Aug 2027Lake18 °C
IRONMAN 70.3 Waco WacoUnited StatesIRONMANMiddle14 Nov 2027River18 °C
IRONMAN California SacramentoUnited StatesIRONMANFull24 Oct 2027River18 °C
IRONMAN Copenhagen CopenhagenDenmarkIRONMANFull22 Aug 2027Ocean18 °C
IRONMAN New Zealand TaupoNew ZealandIRONMANFull6 Mar 2027Lake18 °C
IRONMAN Tallinn TallinnEstoniaIRONMANFull7 Aug 2027Lake18 °C
JÁNOŠÍK Slovak Xtreme Triathlon NámestovoSlovakiaXTRIFull4 Sept 2027Reservoir18 °C
XTERRA Suzhou Full Distance Triathlon SuzhouChinaXTERRAOlympic1 Nov 2026Lake18 °C
XTERRA Suzhou Sprint Triathlon SuzhouChinaXTERRASprint1 Nov 2026Lake18 °C
XTERRA World Championship Full Distance Triathlon RuidosoUnited StatesXTERRAOlympic18 Sept 2027Lake18 °C
XTERRA World Championship Open Sprint Triathlon RuidosoUnited StatesXTERRASprint19 Sept 2027Lake18 °C
5150 Kraichgau KraichgauGermanyIRONMANOlympic23 May 2027Lake19 °C
Anfi Challenge Mogán-Gran Canaria Mogán (Anfi del Mar)SpainChallenge Family100 km17 Apr 2027Sea19 °C
Challenge Almere-Amsterdam AlmereNetherlandsChallenge FamilyFull11 Sept 2027Lake19 °C
Challenge Almere-Amsterdam AlmereNetherlandsChallenge FamilyMiddle11 Sept 2027Lake19 °C
IRONMAN 70.3 Boise BoiseUnited StatesIRONMANMiddle24 Jul 2027Reservoir19 °C
IRONMAN 70.3 Bolton BoltonUnited KingdomIRONMANMiddle6 Jun 2027Lake19 °C
IRONMAN 70.3 Dallas-Little Elm DallasUnited StatesIRONMANMiddle14 Mar 2027Lake19 °C
IRONMAN 70.3 Florida Haines CityUnited StatesIRONMANMiddle13 Dec 2026Lake19 °C
IRONMAN 70.3 Kraichgau KraichgauGermanyIRONMANMiddle23 May 2027Lake19 °C
IRONMAN 70.3 New Zealand TaupoNew ZealandIRONMANMiddle6 Mar 2027Lake19 °C
IRONMAN 70.3 St. Pölten St. PoltenAustriaIRONMANMiddle23 May 2027Lake19 °C
IRONMAN 70.3 Tours Metropole - Loire Valley ToursFranceIRONMANMiddle6 Jun 2027River19 °C
IRONMAN 70.3 Valencia ValenciaSpainIRONMANMiddle18 Apr 2027Ocean19 °C
IRONMAN 70.3 Victoria VictoriaCanadaIRONMANMiddle30 May 2027Lake19 °C
IRONMAN 70.3 Western Australia BusseltonAustraliaIRONMANMiddle6 Dec 2026Bay19 °C
IRONMAN 70.3 Western Sydney PenrithAustraliaIRONMANMiddle2 May 2027Lake19 °C
IRONMAN Belgium Knokke-Heist Knokke-HeistBelgiumIRONMANFull5 Sept 2027Canal19 °C
XTERRA Anglesea Full Distance Triathlon AngleseaAustraliaXTERRAOlympic14 Feb 2027Ocean19 °C
XTERRA Anglesea Sprint Distance Triathlon AngleseaAustraliaXTERRASprint13 Feb 2027Ocean19 °C
5150 Erkner ErknerGermanyIRONMANOlympic11 Sept 2027Lake20 °C
Challenge Barcelona BarcelonaSpainChallenge FamilyMiddle25 Oct 2026Sea20 °C
Challenge Samarkand SamarkandUzbekistanChallenge FamilyMiddle22 Aug 2027Lake20 °C
Challenge Vieux Boucau Vieux-Boucau-les-BainsFranceChallenge Family100 km2 Oct 2027Lake20 °C
Challenge Xiamen XiamenChinaChallenge FamilyMiddle7 Nov 2026Sea20 °C
HimalayanXtri PokharaNepalXTRIFull8 May 2027Lake20 °C
IRONMAN 70.3 Coeur d'Alene Coeur d'AleneUnited StatesIRONMANMiddle27 Jun 2027Lake20 °C
IRONMAN 70.3 Encarnacion EncarnacionParaguayIRONMANMiddle11 Oct 2026River20 °C
IRONMAN 70.3 Erkner ErknerGermanyIRONMANMiddle12 Sept 2027Lake20 °C
IRONMAN 70.3 Florianopolis FlorianopolisBrazilIRONMANMiddle24 Oct 2027Ocean20 °C
IRONMAN 70.3 Jonkoping JonkopingSwedenIRONMANMiddle11 Jul 2027Lake20 °C
IRONMAN 70.3 Luxembourg MoselleLuxembourgIRONMANMiddle11 Jul 2027River20 °C
IRONMAN 70.3 Muncie MuncieUnited StatesIRONMANMiddle10 Jul 2027Reservoir20 °C
IRONMAN 70.3 Muskoka HuntsvilleCanadaIRONMANMiddle18 Jul 2027Lake20 °C
IRONMAN 70.3 Nelson Mandela Bay Port ElizabethSouth AfricaIRONMANMiddle31 Jan 2027Bay20 °C
IRONMAN 70.3 Pucon PuconChileIRONMANMiddle10 Jan 2027Lake20 °C
IRONMAN 70.3 San Juan San JuanArgentinaIRONMANMiddle11 Apr 2027Reservoir20 °C
IRONMAN 70.3 Washington Tri-Cities RichlandUnited StatesIRONMANMiddle19 Sept 2027River20 °C
IRONMAN Brazil BrazilIRONMANFull13 Jun 2027Ocean20 °C
IRONMAN Kalmar-Sweden KalmarSwedenIRONMANFull21 Aug 2027Ocean20 °C
IRONMAN Lanzarote LanzaroteSpainIRONMANFull15 May 2027Ocean20 °C
IRONMAN Les Sables d'Olonne-Vendee Les Sables d'OlonneFranceIRONMANFull27 Jun 2027Ocean20 °C
IRONMAN South Africa, Mossel Bay Mossel BaySouth AfricaIRONMANFull18 Apr 2027Sea20 °C
Challenge Forte Village Pula (Forte Village)ItalyChallenge FamilyMiddle24 Oct 2027Sea21 °C
IRONMAN 70.3 Agadir AgadirMoroccoIRONMANMiddle25 Oct 2026Ocean21 °C
IRONMAN 70.3 Calgary CochraneCanadaIRONMANMiddle25 Jul 2027Lake21 °C
IRONMAN 70.3 Duisburg DuisburgGermanyIRONMANMiddle29 Aug 2027Lake21 °C
IRONMAN 70.3 Hengqin HengqinChinaIRONMANMiddle14 Mar 2027Harbour21 °C
IRONMAN 70.3 Mossel Bay Mossel BaySouth AfricaIRONMANMiddle22 Nov 2026Bay21 °C
IRONMAN 70.3 Peru LimaPeruIRONMANMiddle25 Apr 2027Ocean21 °C
IRONMAN 70.3 Versailles VersaillesFranceIRONMANMiddle11 Oct 2026Reservoir21 °C
IRONMAN 70.3 Vitoria-Gasteiz Vitoria-GasteizSpainIRONMANMiddle11 Jul 2027Lake21 °C
IRONMAN Canada-Ottawa OttawaCanadaIRONMANFull8 Aug 2027River21 °C
IRONMAN Hamburg HamburgGermanyIRONMANFull6 Jun 2027Lake21 °C
IRONMAN Japan South Hokkaido HokutoJapanIRONMANFull12 Sept 2027Ocean21 °C
IRONMAN Leeds LeedsUnited KingdomIRONMANFull15 Aug 2027Lake21 °C
IRONMAN Vitoria-Gasteiz Vitoria-GasteizSpainIRONMANFull11 Jul 2027Lake21 °C
IRONMAN Western Australia BusseltonAustraliaIRONMANFull6 Dec 2026Bay21 °C
XTERRA Asia-Pacific Championship Full Distance Triathlon DunsboroughAustraliaXTERRAOlympic3 Apr 2027Ocean21 °C
XTERRA Asia-Pacific Championship Sprint Distance Triathlon DunsboroughAustraliaXTERRASprint3 Apr 2027Ocean21 °C
XTERRA European Championship Full Distance Triathlon MolvenoItalyXTERRAOlympic12 Jun 2027Lake21 °C
XTERRA European Championship Short Track Triathlon MolvenoItalyXTERRASprint13 Jun 2027Lake21 °C
XTERRA European Championship Sprint Triathlon MolvenoItalyXTERRASprint12 Jun 2027Lake21 °C
XTERRA European Championship Super Sprint Triathlon MolvenoItalyXTERRASuper sprint13 Jun 2027Lake21 °C
5150 Jujuy San Salvador de JujuyArgentinaIRONMANOlympic21 Feb 2027Lake22 °C
5150 San Juan San JuanArgentinaIRONMANOlympic30 Oct 2026Reservoir22 °C
Challenge Israman EilatIsraelChallenge FamilyFull29 Jan 2027Sea22 °C
Challenge Israman EilatIsraelChallenge FamilyMiddle29 Jan 2027Sea22 °C
Challenge Kaiserwinkl-Walchsee WalchseeAustriaChallenge Family100 km27 Jun 2027Lake22 °C
Challenge Shanghai ShanghaiChinaChallenge FamilyMiddle24 Oct 2026Lake22 °C
CLASH Daytona Distance Triathlon Daytona BeachUnited StatesClash EnduranceCustom format6 Dec 2026Lake22 °C
CLASH Daytona Middle Distance Triathlon Daytona BeachUnited StatesClash EnduranceMiddle6 Dec 2026Lake22 °C
CLASH Daytona Sprint Triathlon Daytona BeachUnited StatesClash EnduranceSprint5 Dec 2026Lake22 °C
IRONMAN 70.3 Chattanooga ChattanoogaUnited StatesIRONMANMiddle16 May 2027River22 °C
IRONMAN 70.3 Durban DurbanSouth AfricaIRONMANMiddle6 Jun 2027Ocean22 °C
IRONMAN 70.3 Emilia Romagna CerviaItalyIRONMANMiddle19 Sept 2027Ocean22 °C
IRONMAN 70.3 Leipzig LeipzigGermanyIRONMANMiddle8 Aug 2027Lake22 °C
IRONMAN 70.3 Muscat MuscatOmanIRONMANMiddle6 Feb 2027Sea22 °C
IRONMAN 70.3 Musselman GenevaUnited StatesIRONMANMiddle11 Jul 2027Lake22 °C
IRONMAN 70.3 North Carolina WilmingtonUnited StatesIRONMANMiddle16 Oct 2027Ocean22 °C
IRONMAN 70.3 São Paulo São PauloBrazilIRONMANMiddle19 Sept 2027Reservoir22 °C
IRONMAN 70.3 Sunshine Coast MooloolabaAustraliaIRONMANMiddle12 Sept 2027Ocean22 °C
IRONMAN 70.3 Texas Galveston IslandUnited StatesIRONMANMiddle4 Apr 2027Bay22 °C
IRONMAN 70.3 Vichy VichyFranceIRONMANMiddle22 Aug 2027River22 °C
IRONMAN Calella-Barcelona CalellaSpainIRONMANFull3 Oct 2027Ocean22 °C
IRONMAN Florida Panama City BeachUnited StatesIRONMANFull7 Nov 2026Ocean22 °C
IRONMAN Italy Emilia Romagna CerviaItalyIRONMANFull18 Sept 2027Ocean22 °C
IRONMAN Lake Placid Lake PlacidUnited StatesIRONMANFull25 Jul 2027Lake22 °C
IRONMAN Maryland CambridgeUnited StatesIRONMANFull18 Sept 2027River22 °C
IRONMAN San Juan San JuanArgentinaIRONMANFull1 Nov 2026Reservoir22 °C
IRONMAN Vichy VichyFranceIRONMANFull22 Aug 2027River22 °C
T100 Challenger Peguera Mallorca Peguera (Calvià)SpainChallenge Family100 km16 Oct 2027Sea22 °C
Triathlon International d'Obernai-Benfeld – L BenfeldFranceIndependent100 km6 Jun 2027Lake22 °C
Challenge Sanremo SanremoItalyChallenge FamilyMiddle4 Oct 2026Harbour23 °C
DATEV Challenge Roth RothGermanyChallenge FamilyFull4 Jul 2027Canal23 °C
IRONMAN 70.3 Augusta AugustaUnited StatesIRONMANMiddle26 Sept 2027River23 °C
IRONMAN 70.3 Bahrain ManamaBahrainIRONMANMiddle11 Dec 2026Bay23 °C
IRONMAN 70.3 Belgrade BelgradeSerbiaIRONMANMiddle12 Sept 2027Lake23 °C
IRONMAN 70.3 Buenos Aires Palermo Buenos AiresArgentinaIRONMANMiddle4 Oct 2026Lake23 °C
IRONMAN 70.3 Cairns CairnsAustraliaIRONMANMiddle13 Jun 2027Ocean23 °C
IRONMAN 70.3 Costa Navarino, Peloponnese, Greece PeloponneseGreeceIRONMANMiddle25 Oct 2026Ocean23 °C
IRONMAN 70.3 Doha DohaQatarIRONMANMiddle20 Mar 2027Sea23 °C
IRONMAN 70.3 Port Macquarie Port MacquarieAustraliaIRONMANMiddle17 Oct 2027River23 °C
IRONMAN 70.3 Punta del Este Punta del EsteUruguayIRONMANMiddle7 Mar 2027Ocean23 °C
IRONMAN 70.3 Rio de Janeiro Rio de JaneiroBrazilIRONMANMiddle8 Aug 2027Ocean23 °C
IRONMAN Australia Port MacquarieAustraliaIRONMANFull17 Oct 2027River23 °C
IRONMAN Cairns CairnsAustraliaIRONMANFull13 Jun 2027Ocean23 °C
IRONMAN Frankfurt FrankfurtGermanyIRONMANFull27 Jun 2027Lake23 °C
IRONMAN Kaernten-Klagenfurt, Austria KlagenfurtAustriaIRONMANFull13 Jun 2027Lake23 °C
IRONMAN Texas The WoodlandsUnited StatesIRONMANFull24 Apr 2027Lake23 °C
SAIL Challenge Montréal MontréalCanadaChallenge FamilyMiddle12 Sept 2027Lake23 °C
SAIL Challenge Québec Québec CityCanadaChallenge FamilyMiddle25 Jul 2027Harbour23 °C
All Japan Triathlon Miyakojima MiyakojimaJapanIndependentCustom format25 Apr 2027Ocean24 °C
Challenge Florianópolis FlorianópolisBrazilChallenge FamilyMiddle29 Nov 2026Sea24 °C
IRONMAN 70.3 Brasilia BrazilIRONMANMiddle18 Apr 2027Lake24 °C
IRONMAN 70.3 Eagleman CambridgeUnited StatesIRONMANMiddle13 Jun 2027River24 °C
IRONMAN 70.3 Gulf Coast Panama City BeachUnited StatesIRONMANMiddle8 May 2027Ocean24 °C
IRONMAN 70.3 Hawai`i Kohala CoastUnited StatesIRONMANMiddle5 Jun 2027Ocean24 °C
IRONMAN 70.3 Maine AugustaUnited StatesIRONMANMiddle25 Jul 2027River24 °C
IRONMAN 70.3 Nice NiceFranceIRONMANMiddle12 Sept 2027Sea24 °C
IRONMAN 70.3 Pennsylvania Happy Valley State CollegeUnited StatesIRONMANMiddle23 May 2027Lake24 °C
IRONMAN 70.3 Wisconsin MadisonUnited StatesIRONMANMiddle11 Sept 2027Lake24 °C
IRONMAN France NiceFranceIRONMANFull12 Sept 2027Sea24 °C
IRONMAN Gurye Korea GuryeSouth KoreaIRONMANFull4 Oct 2026Reservoir24 °C
IRONMAN Oman MuscatOmanIRONMANFull5 Dec 2026Sea24 °C
IRONMAN Penghu PenghuTaiwanIRONMANFull11 Apr 2027Ocean24 °C
IRONMAN Wisconsin MadisonUnited StatesIRONMANFull12 Sept 2027Lake24 °C
XTERRA Czech Republic Full Distance Triathlon PrachaticeCzechiaXTERRAOlympic7 Aug 2027Lake24 °C
XTERRA Czech Republic Hobby Sprint Triathlon PrachaticeCzechiaXTERRASprint7 Aug 2027Lake24 °C
Challenge Taiwan TaitungTaiwanChallenge FamilyFull24 Apr 2027Reservoir25 °C
Challenge Taiwan TaitungTaiwanChallenge FamilyMiddle24 Apr 2027Reservoir25 °C
IRONMAN 70.3 Curitiba CuritibaBrazilIRONMANMiddle21 Mar 2027Lake25 °C
IRONMAN 70.3 Kenting KentingTaiwanIRONMANMiddle1 Nov 2026Ocean25 °C
IRONMAN 70.3 Los Cabos Los CabosMexicoIRONMANMiddle11 Apr 2027Ocean25 °C
IRONMAN 70.3 Türkiye BelekTürkiyeIRONMANMiddle1 Nov 2026Ocean25 °C
IRONMAN 70.3 Veracruz VeracruzMexicoIRONMANMiddle6 Dec 2026Ocean25 °C
IRONMAN Chattanooga ChattanoogaUnited StatesIRONMANFull26 Sept 2027River25 °C
IRONMAN 70.3 Aracaju-Sergipe AracajuBrazilIRONMANMiddle29 Nov 2026River26 °C
IRONMAN 70.3 Colombo ColomboSri LankaIRONMANMiddle22 Aug 2027Ocean26 °C
IRONMAN 70.3 Ecuador MantaEcuadorIRONMANMiddle25 Jul 2027Ocean26 °C
IRONMAN 70.3 Goa GoaIndiaIRONMANMiddle1 Nov 2026Ocean26 °C
IRONMAN 70.3 Ohio SanduskyUnited StatesIRONMANMiddle18 Jul 2027Lake26 °C
IRONMAN 70.3 Panama Panama CityPanamaIRONMANMiddle28 Feb 2027Ocean26 °C
IRONMAN 70.3 Rockford - Illinois RockfordUnited StatesIRONMANMiddle13 Jun 2027River26 °C
IRONMAN 70.3 World Championship ChattanoogaUnited StatesIRONMANMiddle28 Aug 2027River26 °C
IRONMAN Cozumel CozumelMexicoIRONMANFull22 Nov 2026Ocean26 °C
IRONMAN Jacksonville JacksonvilleUnited StatesIRONMANFull16 May 2027River26 °C
IRONMAN World Championship KonaUnited StatesIRONMANFull9 Oct 2027Ocean26 °C
5150 Cartagena CartagenaColombiaIRONMANOlympic5 Sept 2027Bay27 °C
IRONMAN 70.3 Campeche CampecheMexicoIRONMANMiddle8 Nov 2026Ocean27 °C
IRONMAN 70.3 Dhofar SalalahOmanIRONMANMiddle24 Oct 2026Bay27 °C
IRONMAN 70.3 Puerto Rico San JuanPuerto RicoIRONMANMiddle14 Mar 2027Bay27 °C
IRONMAN 70.3 Da Nang DanangVietnamIRONMANMiddle9 May 2027Ocean28 °C
IRONMAN 70.3 Lapu-Lapu Lapu-Lapu CityPhilippinesIRONMANMiddle8 Aug 2027Ocean28 °C
IRONMAN 70.3 Sharm El-Sheikh, Egypt Sharm El-SheikhEgyptIRONMANMiddle16 Oct 2026Bay28 °C
IRONMAN Philippines Davao City Davao CityPhilippinesIRONMANFull13 Jun 2027Ocean28 °C
XTERRA Tahiti Triathlon Full Distance Triathlon MooreaFrench PolynesiaXTERRAOlympic7 Nov 2026Bay28 °C
XTERRA Tahiti Triathlon Sprint Triathlon MooreaFrench PolynesiaXTERRASprint8 Nov 2026Bay28 °C
XTERRA Tahiti Triathlon Super Sprint Triathlon MooreaFrench PolynesiaXTERRASuper sprint7 Nov 2026Bay28 °C
5150 Camiguin CatarmanPhilippinesIRONMANOlympic9 May 2027Ocean29 °C
IRONMAN 70.3 Cartagena CartagenaColombiaIRONMANMiddle29 Nov 2026Bay29 °C
IRONMAN 70.3 Cozumel CozumelMexicoIRONMANMiddle26 Sept 2027Ocean29 °C
IRONMAN 70.3 Davao Philippines Davao CityPhilippinesIRONMANMiddle13 Jun 2027Ocean29 °C
IRONMAN 70.3 Desaru Coast DesaruMalaysiaIRONMANMiddle25 Jul 2027Ocean29 °C
IRONMAN 70.3 Langkawi LangkawiMalaysiaIRONMANMiddle21 Nov 2026Ocean29 °C
IRONMAN 70.3 Phu Quoc Phu QuocVietnamIRONMANMiddle15 Nov 2026Ocean29 °C
IRONMAN Malaysia LangkawiMalaysiaIRONMANFull21 Nov 2026Ocean29 °C
IRONMAN Vietnam Da NangVietnamIRONMANFull9 May 2027Ocean29 °C

129 races in this group do not publish this figure and are left out.

Triathletes in orange caps and wetsuits waiting for the start

The cold end of the range

The coldest averages sit at 13 °C. At that temperature a wetsuit is close to universal where one is allowed, and a swim shortened or cancelled for conditions is a real possibility. Races at this end of the range cluster in early and late season, and in mountain or northern water.

58 races of the 225 with a figure sit at 18 °C or below.

A swimmer rounding a large orange turn buoy

The warm end of the range

The warmest averages reach 29 °C. Above roughly 24 °C wetsuit use is commonly restricted, and the swim becomes a question of heat. The exact threshold depends on the rules applied to each race.

56 races of the 225 sit at 24 °C or above.

Side by side

Compare the water alongside everything else

Water temperature rarely decides a race on its own. Put it next to the month, the labels and the region.

Challenge Sanremo

IRONMAN 70.3 Buenos Aires Palermo

IRONMAN Gurye Korea

  1. Race 1 Challenge Sanremo
  2. Race 2 IRONMAN 70.3 Buenos Aires Palermo
  3. Race 3 IRONMAN Gurye Korea
Circuit
Challenge FamilyIRONMANIRONMAN
Distance
Middle distanceMiddle distanceFull distance
Terrain
RoadRoadRoad
Swim
1.9 km1.9 km3.8 km
Bike
80 km90 km180 km
Run
21.1 km21.1 km42.2 km
Date
4 Oct 20264 Oct 20264 Oct 2026
Country
ItalyArgentinaSouth Korea
Registration
n/aClosedClosed
Swim venue
HarbourLakeReservoir
Average water temperature
23 °C23 °C24 °C
High air temperature
21 °C22 °C25 °C
Low air temperature
16 °C15 °C14 °C
Bike profile
HillyRollingFlat
Bike elevation gain
1,463 mn/an/a
Run profile
RollingFlatHilly
Run elevation gain
160 m94 mn/a
Overall cut-off
8 h8 h 30 min17 h
Altitude
15 m25 mn/a
First edition
202220162017
Swim start
Mass startRolling startRolling start
Entry fee, from
€359n/a$800

Questions

Is the average reliable?

It is an expectation drawn from previous editions. The water on race morning can sit several degrees either side of it, and the wetsuit call is taken then.

Why hide races with no figure when the filter is on?

Keeping them would treat an unknown temperature as an acceptable one. The line under the slider shows how many the filter removed.

Where are the wetsuit thresholds?

They are set by the rules applied to each race, so a single threshold would be wrong for part of the calendar.

Filter the calendar on the water you want

Set a ceiling and see what is left.

Open the race finder
A wide bay with swimmers far out between yellow buoys