SwimTemperature logoSwimTemperature
Open live map
Seasonal ranking

Warmest sea temperature in Ireland in December

Where the sea is warmest across Ireland during December, ranked by long-term monthly average water temperature. Inchydoney (West Coast, Ireland) tops the list at around 11°C. Open any spot for today's live water temperature and a 7-day swim forecast.

  1. 1
    Inchydoney
    West Coast · Ireland · Celtic Sea
    Cold — wetsuit strongly recommended
    11°C
    December average
  2. 2
    Derrynane
    West Coast · Ireland · Celtic Sea
    Cold — wetsuit strongly recommended
    11°C
    December average
  3. 3
    Inch Beach
    West Coast · Ireland · Celtic Sea
    Cold — wetsuit strongly recommended
    11°C
    December average
  4. 4
    Fanore
    West Coast · Ireland · Celtic Sea
    Cold — wetsuit strongly recommended
    11°C
    December average
  5. 5
    Keem Bay
    West Coast · Ireland · Celtic Sea
    Cold — wetsuit strongly recommended
    11°C
    December average
  6. 6
    Dog's Bay
    West Coast · Ireland · Celtic Sea
    Cold — wetsuit strongly recommended
    11°C
    December average
  7. 7
    Streedagh
    West Coast · Ireland · Celtic Sea
    Cold — wetsuit strongly recommended
    11°C
    December average
  8. 8
    Brittas Bay
    East Coast · Ireland · Irish Sea
    Cold — wetsuit strongly recommended
    11°C
    December average
  9. 9
    Curracloe
    East Coast · Ireland · Irish Sea
    Cold — wetsuit strongly recommended
    11°C
    December average
  10. 10
    Portmarnock
    East Coast · Ireland · Irish Sea
    Cold — wetsuit strongly recommended
    11°C
    December average
  11. 11
    Greystones South
    County Wicklow · Ireland · Atlantic Ocean
    Cold — wetsuit strongly recommended
    11°C
    December average
  12. 12
    Bray Beach
    County Wicklow · Ireland · Atlantic Ocean
    Cold — wetsuit strongly recommended
    11°C
    December average
  13. 13
    Killiney Beach
    County Dublin · Ireland · Atlantic Ocean
    Cold — wetsuit strongly recommended
    11°C
    December average
  14. 14
    Seapoint
    County Dublin · Ireland · Atlantic Ocean
    Cold — wetsuit strongly recommended
    11°C
    December average
  15. 15
    Sandycove
    County Dublin · Ireland · Atlantic Ocean
    Cold — wetsuit strongly recommended
    11°C
    December average
  16. 16
    Forty Foot
    County Dublin · Ireland · Atlantic Ocean
    Cold — wetsuit strongly recommended
    11°C
    December average
  17. 17
    Portmarnock Beach
    County Dublin · Ireland · Atlantic Ocean
    Cold — wetsuit strongly recommended
    11°C
    December average
  18. 18
    Donabate Beach
    County Dublin · Ireland · Atlantic Ocean
    Cold — wetsuit strongly recommended
    11°C
    December average
  19. 19
    Portrane Beach
    County Dublin · Ireland · Atlantic Ocean
    Cold — wetsuit strongly recommended
    11°C
    December average
  20. 20
    Skerries South Strand
    County Dublin · Ireland · Atlantic Ocean
    Cold — wetsuit strongly recommended
    11°C
    December average
  21. 21
    Balbriggan Front Strand
    County Dublin · Ireland · Atlantic Ocean
    Cold — wetsuit strongly recommended
    11°C
    December average
  22. 22
    Bettystown Beach
    County Meath · Ireland · Atlantic Ocean
    Cold — wetsuit strongly recommended
    11°C
    December average
  23. 23
    Laytown Beach
    County Meath · Ireland · Atlantic Ocean
    Cold — wetsuit strongly recommended
    11°C
    December average
  24. 24
    Clogherhead Beach
    County Louth · Ireland · Atlantic Ocean
    Cold — wetsuit strongly recommended
    11°C
    December average
  25. 25
    Templetown Beach
    County Louth · Ireland · Atlantic Ocean
    Cold — wetsuit strongly recommended
    11°C
    December average

Warmest sea in December elsewhere

EuropeNorth AmericaSouth AmericaAsiaAfricaOceaniaUnited StatesUnited KingdomAustraliaSpainItalyFranceGreeceMexicoPortugalNew ZealandCanadaCroatiaThailandIndonesiaBrazilPhilippinesPolandSwedenDenmarkTurkeyJapanGermanyNorway

Ireland in December — frequently asked questions

Where is the sea warmest in Ireland in December?
Inchydoney in Ireland has the warmest sea in Ireland in December, averaging about 11.0 °C. Derrynane (11.0 °C) and Inch Beach follow close behind.
How many beaches in Ireland are warm enough to swim in December?
None of the top 25 ranked beaches in Ireland 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

United StatesUnited KingdomAustraliaSpainItalyFranceGreeceMexicoPortugalNew ZealandCanadaCroatiaIrelandThailandIndonesiaBrazilPhilippinesPolandSwedenDenmarkTurkeyJapanGermanyNorwayNetherlandsCyprusBulgariaIndiaSouth AfricaEgyptDominican RepublicSri LankaAll destinations →

Coastal region hubs

New South WalesSardiniaAlgarveAquitaineCornwallSicilyWestern AustraliaTuscanyVictoriaBaliNorth IslandLanguedocLiguriaBrittanyIstriaSilver CoastPacific CoastApuliaBritish ColumbiaCosta del SolDevonNova ScotiaGaliciaMallorca

Water temperature today by city

LondonManchesterBirminghamEdinburghGlasgowDublinParisLyonToulouseBordeauxMadridBarcelonaSevilleLisbonPortoRomeMilanFlorenceNaplesBerlin

Warmest sea in August

EuropeNorth AmericaSouth AmericaAsiaAfricaOceaniaUnited StatesUnited KingdomAustraliaSpainItalyFranceGreeceMexicoPortugalNew ZealandCanadaCroatiaIrelandThailandWarmest right now →

Warmest sea month by month (Europe)

JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember

Popular beach comparisons

Platja d'Aro vs Platja de Sant PolCala Sa Tuna vs AiguablavaCala Pola vs Platja GranCala Montjoi vs Platja de PalsPlatja de Pals vs Cala Sa TunaCala Estreta vs Platja d'AroPlatja de Lloret vs Platja GranPlatja de la Pineda vs Salou LevantePlatja Llarga vs Platja del MiracleCambrils Playa vs Salou LevantePlaya del Postiguet vs Playa de San JuanPlaya de San Juan vs Playa del Postiguet SurPlaya de Levante vs Playa de PonienteCala Finestrat vs Playa de PonientePlaya del Albir vs Playa de LevantePlaya de la Fossa vs Cala BaladrarCala el Portet vs Cala del MoraigPlaya del Arenal vs Cala GranadellaCompare any two beaches →

Freshwater swimming

All lake water temperatures (525)Live lake mapCompare lakesRivers & swimming holesLive sea temperature mapSwimming guides

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

Warmest sea this month

europenorth americaasiaoceania