River Tamar - St John's Lake Entrance Weather Forecast

    • 16
    • 20

    Cloudy

    • 14
    • 20

    Light rain

    • 12
    • 19

    Sunny day

    • 15
    • 19

    Cloudy

    • 14
    • 20

    Cloudy

    • 14
    • 20

    Cloudy

    • 14
    • 20

    Partly cloudy

Today 3 Aug South West England

A cloudy and humid day with some hill fog and low cloud at first. Outbreaks of rain and drizzle at times, but some places remaining dry. Perhaps turning brighter in the west by late afternoon. Rather breezy. Maximum Temperature 20C.

Tonight 3 Aug South West England

Any patchy rain easing with clear spells for a time. Cloud thickening from the west with outbreaks of rain in west Cornwall by dawn. Increasingly windy, especially along northern coasts. Minimum Temperature 14C.

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River Tamar - St John's Lake Entrance Temperature Statistics

August Temperature

Mount Batten (5km)

  • Lowest 2 August, 2025

    9.5 °C

  • Average August

    14 °C

  • Highest 1 August, 2025

    19.8 °C

Climate (2020–Present)

Mount Batten (5km)

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  • Average Low 2020–2025

    8.9 °C

  • Average 2020–2025

    11.8 °C

  • Average High 2020–2025

    15 °C
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