Seasonal ranking
Coldest sea temperature in Australia in December
Where the sea is coolest across Australia during December, ranked by long-term monthly average water temperature. St Kilda Beach (Victoria, Australia) is the coolest at around 18°C. Open any spot for today's live water temperature and a 7-day swim forecast.
- 1St Kilda BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 2Brighton BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 3Sandringham BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 4Mentone BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 5Mordialloc BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 6Frankston BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 7Mount Martha BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 8Sorrento Front BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 9Portsea BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 10Gunnamatta BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 11Bells BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 12Lorne BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 13Apollo Bay BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 14Anglesea Main BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 15Phillip Island SmithsVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 16Inverloch Surf BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 17Lakes Entrance 90 MileVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 18Mallacoota BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 19Rosebud BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 20Mornington Main BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 21Point Leo BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 22Cowes BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 23Aireys Inlet BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 24Wye River BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
- 25Kennett River BeachVictoria · Australia · Bass StraitMild — fine for a swim, cool at first18°CDecember average
Coldest sea in December elsewhere
EuropeNorth AmericaSouth AmericaAsiaAfricaOceaniaUnited StatesUnited KingdomItalySpainFranceGreeceMexicoPortugalNew ZealandCroatiaCanadaIrelandThailandIndonesiaPhilippinesBrazilSwedenPolandDenmarkNorwayTurkeyNetherlandsGermanyBulgariaJapanCyprusEgyptIndiaSouth AfricaDominican RepublicRomaniaCosta RicaMaltaPuerto RicoBahamasBelgiumBarbadosSouth KoreaVietnamJamaicaSri LankaUnited Arab EmiratesOmanUS Virgin IslandsAntigua and BarbudaPanamaFinlandMalaysiaCuracaoArgentinaChileColombiaIsraelTanzaniaMoroccoTunisiaTurks and CaicosFijiArubaAlbaniaUruguayPeruMaldivesMauritiusBelizeNicaraguaSaint LuciaCubaMozambiqueFrench PolynesiaBonaireHondurasFrench RivieraAlgarveAmalfi CoastCosta BravaGreek IslandsDalmatian CoastFlorida KeysGreat Barrier Reef CoastCaliforniaFloridaHawaiiNew JerseyNorth CarolinaMassachusettsSouth CarolinaTexasNew YorkPuerto RicoMaineOregonMichiganGeorgiaWashington
Australia in December — frequently asked questions
- Where is the sea coldest in Australia in December?
- St Kilda Beach in Australia has the coldest sea in Australia in December, averaging about 18.0 °C. Brighton Beach (18.0 °C) and Sandringham Beach are the next coolest.
- How many beaches in Australia are warm enough to swim in December?
- None of the top 25 ranked beaches in Australia reach 22 °C in December, so a wetsuit is recommended for anything longer than a quick dip.
- How are these December sea temperatures calculated?
- Each figure is a long-term monthly average sea surface temperature for that location, so it reflects a typical December rather than today's reading. Open a beach page for the live water temperature and 7-day forecast.
Explore every sea temperature page
Jump straight to a country, coastal region, city, seasonal ranking or comparison.
Sea temperature by country
Coastal region hubs
Water temperature today by city
Warmest sea in August
Warmest sea month by month (Europe)
Coldest sea this month
Swimming guides
The best time to swim in the MediterraneanWhat sea temperature is safe to swim in?Swimming with kids: the best European beachesHow sea-surface temperature data actually worksWhat sea temperature is good for snorkelling?The best time to swim in SpainThe best time to swim in GreeceThe best time to swim in CroatiaThe best time to swim in FloridaThe best time to swim in CaliforniaThe best time to swim in AustraliaA beginner's guide to cold-water swimmingWarmest European beaches in OctoberFamily beach safety tips for every swimmerWetsuit guide: what to wear by water temperatureThe best time to swim in the CaribbeanThe best time to swim in MexicoThe best time to swim in ThailandThe best time to swim in PortugalThe best time to swim in TurkeyThe best time to swim in EgyptThe best time to swim in FranceThe best time to swim in ItalyBest beaches for snorkelling around the worldBest beaches for surfing by water temperatureHow to survive a rip currentJellyfish and marine life safety for swimmersHow to read a water temperature forecastLake Michigan water temperature: what to expectBest lakes to swim in the United StatesGreat Lakes swimming guideThe best time to swim in HawaiiThe best time to swim in the MaldivesThe best time to swim in Bali
Popular beach comparisons
Cala Estreta vs Platja d'AroCala Estreta vs Cala Sa TunaCala Pola vs Platja de LloretPlatja de Sant Pol vs Platja GranCala Montjoi vs Platja de PalsCala Pola vs Platja de Sant PolCala Estreta vs Platja de PalsAiguablava vs Cala EstretaCambrils Playa vs Platja de la PinedaPlatja de la Pineda vs Platja LlargaPlatja del Miracle vs Salou LevantePlaya del Carabassí vs Playa del PostiguetPlaya de San Juan vs Playa del CarabassíPlaya de la Fossa vs Playa de LevantePlaya de la Fossa vs Playa de PonienteCala Finestrat vs Playa del AlbirCala el Portet vs Playa de la FossaCala del Moraig vs Playa del ArenalCompare any two beaches →
Freshwater swimming
Keep exploring
Live sea temperature mapEvery coast, updated hourlyWarmest beaches todayLive ranking right nowCompare two beachesSide-by-side swim conditionsLake water temperaturesFreshwater swimming spotsRivers & swimming holesWild swimming conditionsAll destinationsBrowse by country & region