Portsmouth Harbour - Haslar Marina Weather Forecast

    • 18
    • 23

    Sunny day

    • 19
    • 23

    Cloudy

    • 17
    • 21

    Light rain shower

    • 18
    • 20

    Light rain shower

    • 18
    • 20

    Light rain shower

    • 17
    • 20

    Light rain shower

Today 25 Aug London and South East England

Another dry and bright day with lengthy sunny spells Light to moderate easterly winds throughout, leading to a cooler feel around the coasts, but turning increasingly humid. Maximum temperature 25 °C.

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Portsmouth Harbour - Haslar Marina Temperature Statistics

August Temperature

Thorney Island (14km)

  • Lowest 8 August, 2026

    10.6 °C

  • Average August

    20.2 °C

  • Highest 13 August, 2026

    32 °C

Climate (2021–2026)

Thorney Island (14km)

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  • Average Low 2021–2026

    9 °C

  • Average 2021–2026

    12.3 °C

  • Average High 2021–2026

    15.6 °C
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