Caernarfon weather live forecast

Today's maximum temperature in Caernarfon is expected to be 55°F. Select a day from the live weather forecast for Caernarfon, Wales, UK for more weather parameters.

5-day weather forecast updated at 04:03 on Sunday 21st September 2025 GMT

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

Caernarfon weather forecast by day

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

Caernarfon weather for Sunday 21st September 2025

Expect sunshine and showers in Caernarfon, Wales with a maximum temperature of 55°F, maximum UV of 3 (Moderate) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 13% chance of some rain and a moderate breeze of 15 mph from the north.

  • 55°F maximum temperature55
    °F maximum temperature
  • 50°F minimum temperature50
    °F minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 13% chance of some rain13
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Moderate breeze of 15 mph from the North15
    mph wind from N

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Caernarfon weather for Monday 22nd September 2025

Expect scattered clouds in Caernarfon, Wales with a maximum temperature of 57°F, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the north.

  • 57°F maximum temperature57
    °F maximum temperature
  • 48°F minimum temperature48
    °F minimum temperature
  • Scattered clouds
    scattered clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 57°F wind chill57
    °F wind chill
  • Gentle breeze of 11 mph from the North11
    mph wind from N

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Caernarfon weather for Tuesday 23rd September 2025

Expect scattered clouds in Caernarfon, Wales with a maximum temperature of 59°F, maximum UV of 3 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the north-east.

  • 59°F maximum temperature59
    °F maximum temperature
  • 48°F minimum temperature48
    °F minimum temperature
  • Scattered clouds
    scattered clouds
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 7 mph from the North-East7
    mph wind from NE

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Caernarfon weather for Wednesday 24th September 2025

Expect broken clouds in Caernarfon, Wales with a maximum temperature of 61°F, maximum UV of 3 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the south-east.

  • 61°F maximum temperature61
    °F maximum temperature
  • 46°F minimum temperature46
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 6 mph from the South-East6
    mph wind from SE

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Caernarfon weather for Thursday 25th September 2025

Expect broken clouds in Caernarfon, Wales with a maximum temperature of 63°F, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the south-east.

  • 63°F maximum temperature63
    °F maximum temperature
  • 48°F minimum temperature48
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 63°F wind chill63
    °F wind chill
  • Light breeze of 6 mph from the South-East6
    mph wind from SE

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