Caernarfon weather live forecast

Today's maximum temperature in Caernarfon is expected to be 25°C. Select a day from the live weather forecast for Caernarfon, Wales, UK for more weather parameters.

5-day weather forecast updated at 04:04 on Sunday 10th August 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 Monday 11th August 2025

Expect broken clouds in Caernarfon, Wales with a maximum temperature of 25°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south.

  • 25°C maximum temperature25
    °C maximum temperature
  • 18°C minimum temperature18
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 25°C wind chill25
    °C wind chill
  • Gentle breeze of 15 kph from the South15
    kph wind from S

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Caernarfon weather for Tuesday 12th August 2025

Expect broken clouds in Caernarfon, Wales with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south-east.

  • 28°C maximum temperature28
    °C maximum temperature
  • 19°C minimum temperature19
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Gentle breeze of 15 kph from the South-East15
    kph wind from SE

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Caernarfon weather for Wednesday 13th August 2025

Expect mostly cloudy with light rain in Caernarfon, Wales with a maximum temperature of 22°C, maximum UV of 4 (Moderate) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 26% chance of some rain and a moderate breeze of 20 kph from the south.

  • 22°C maximum temperature22
    °C maximum temperature
  • 17°C minimum temperature17
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 26% chance of some rain26
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 22°C wind chill22
    °C wind chill
  • Moderate breeze of 20 kph from the South20
    kph wind from S

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Caernarfon weather for Thursday 14th August 2025

Expect mostly cloudy with light rain in Caernarfon, Wales with a maximum temperature of 22°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 25% chance of some rain and a gentle breeze of 16 kph from the south-west.

  • 22°C maximum temperature22
    °C maximum temperature
  • 16°C minimum temperature16
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 25% chance of some rain25
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 22°C wind chill22
    °C wind chill
  • Gentle breeze of 16 kph from the South-West16
    kph wind from SW

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Caernarfon weather for Friday 15th August 2025

Expect isolated thunderstorms in Caernarfon, Wales with a maximum temperature of 22°C, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 22% chance of some rain and a gentle breeze of 17 kph from the south.

  • 22°C maximum temperature22
    °C maximum temperature
  • 16°C minimum temperature16
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 22% chance of some rain22
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 22°C wind chill22
    °C wind chill
  • Gentle breeze of 17 kph from the South17
    kph wind from S

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

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