Porthmadog weather live forecast

Tomorrow's maximum temperature in Porthmadog is expected to be 13°C.

  • Sunday
    25th May
    Sunshine and showers (0-2 mm of rainfall expected)
  • Monday
    26th May
    Mostly cloudy with rain (5-10 mm of rainfall expected)
  • Tuesday
    27th May
    Cloudy with some rain (10-20 mm of rainfall expected)
  • Wednesday
    28th May
    Mostly cloudy with light rain (2-5 mm of rainfall expected)
  • Thursday
    29th May
    Cloudy with some rain (20-30 mm of rainfall expected)

5-day weather forecast updated at 04:03 on Sunday 25th May 2025 GMT

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The 5-day weather forecast for Wales (Porthmadog) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Porthmadog weather forecast by day

Below are the detailed weather forecasts for Porthmadog for the next 5 days.

Porthmadog weather for Sunday 25th May 2025

Expect sunshine and showers in Porthmadog, Wales with a maximum temperature of 13°C, maximum UV of 4 (Moderate) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 86% chance of some rain and a fresh breeze of 36 kph from the west.

  • 13°C maximum temperature13
    °C maximum temperature
  • 10°C minimum temperature10
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 86% chance of some rain86
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Fresh breeze of 36 kph from the West36
    kph wind from W

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Porthmadog weather for Monday 26th May 2025

Expect mostly cloudy with rain in Porthmadog, Wales with a maximum temperature of 12°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 5-10 mm of rainfall expected with 99% chance of some rain and a strong breeze of 42 kph from the south-west.

  • 12°C maximum temperature12
    °C maximum temperature
  • 8°C minimum temperature8
    °C minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 99% chance of some rain99
    % chance of some rain
  • 5-10 mm of rainfall expected<10
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Strong breeze of 42 kph from the South-West42
    kph wind from SW

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Porthmadog weather for Tuesday 27th May 2025

Expect cloudy with some rain in Porthmadog, Wales with a maximum temperature of 14°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 92% chance of some rain and a fresh breeze of 37 kph from the south-west.

  • 14°C maximum temperature14
    °C maximum temperature
  • 10°C minimum temperature10
    °C minimum temperature
  • Cloudy with some rain
    cloudy with some rain
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 92% chance of some rain92
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • 14°C wind chill14
    °C wind chill
  • Fresh breeze of 37 kph from the South-West37
    kph wind from SW

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Porthmadog weather for Wednesday 28th May 2025

Expect mostly cloudy with light rain in Porthmadog, Wales with a maximum temperature of 15°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 65% chance of some rain and a fresh breeze of 35 kph from the west.

  • 15°C maximum temperature15
    °C maximum temperature
  • 10°C minimum temperature10
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 65% chance of some rain65
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Fresh breeze of 35 kph from the West35
    kph wind from W

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Porthmadog weather for Thursday 29th May 2025

Expect cloudy with some rain in Porthmadog, Wales with a maximum temperature of 15°C, maximum UV of 5 (Moderate) and no hours of bright sunshine. There are 20-30 mm of rainfall expected with 76% chance of some rain and a strong breeze of 39 kph from the south-west.

  • 15°C maximum temperature15
    °C maximum temperature
  • 10°C minimum temperature10
    °C minimum temperature
  • Cloudy with some rain
    cloudy with some rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 76% chance of some rain76
    % chance of some rain
  • 20-30 mm of rainfall expected<30
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Strong breeze of 39 kph from the South-West39
    kph wind from SW

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Metric (°C / mm)  |  Imperial (°F / inches)

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