Best year time to visit Portmarnock

General weather information about Portmarnock

Average annual temperature is 11.4 °C

Absolute maximum temperature: 25.3 °C

Absolute minimum temperature: -2.5 °C

Number of sunny days: 97 days

Number of rainy days: 267 days

Number of snow days: 1 day

Look at detailed online map of Portmarnock

* Weather data for Portmarnock Ireland is based on climate observations for 2026 year

Portmarnock air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)14.113.416.016.718.925.321.122.323.222.214.813.8
Average daytime temperature (°C)8.910.410.412.115.619.018.319.018.415.010.610.0
Average temperature (°C)6.68.27.79.312.816.315.516.015.512.58.58.3
Average night temperature (°C)4.55.85.46.59.713.312.813.212.59.86.26.3
Absolute minimum temperature (°C)-2.5-0.6-1.21.95.810.19.610.26.83.10.9-0.1

Portmarnock monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)8.010.012.014.016.017.016.015.013.011.09.07.0
Daylight mean duration (h)8.29.811.914.015.916.916.414.712.710.68.77.6
Daylight minimum duration (h)7.08.010.013.015.016.015.013.011.09.07.07.0
Sunshine mean duration (h)3.94.35.08.910.912.09.69.17.25.45.12.6
Precipitation (mm)621613410034631451181291266094
Sunny days12152513121487117
Rainy days181329251818302722241924
Snow days100000000000

Portmarnock - weather forecast by months

Portmarnock weather in januaryPortmarnock weather in februaryPortmarnock weather in marchPortmarnock weather in aprilPortmarnock weather in mayPortmarnock weather in junePortmarnock weather in julyPortmarnock weather in augustPortmarnock weather in septemberPortmarnock weather in octoberPortmarnock weather in novemberPortmarnock weather in december

Best time to visit Portmarnock:

The best time to visit Portmarnock during the most sunny months:

  • April — 8.9(h)
  • May — 10.9(h)
  • June — 12.0(h)
  • July — 9.6(h)
  • August — 9.1(h)

Months with the longest average daylight duration in Portmarnock:

  • May — 15.9(h)
  • June — 16.9(h)
  • July — 16.4(h)

The largest precipitation sum in Portmarnock is at

  • March — 134(mm)
  • July — 145(mm)
  • August — 118(mm)
  • September — 129(mm)
  • October — 126(mm)

    • Weather forecast in the closest to Portmarnock admin centers

    Weather forecast in the closest towns to Portmarnock

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    Frequently asked questions

    When is the best time to visit Portmarnock?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Portmarnock.
    What is the weather like in Portmarnock?
    See average temperature, rainfall and daylight hours for Portmarnock by month in the table above.
    How many sunny days does Portmarnock have?
    The monthly weather statistics above show sunshine and rainfall patterns for Portmarnock throughout the year.