Portsmouth Harbour - Haslar Marina Weather Forecast

    • 22
    • 28

    Sunny day

    • 21
    • 30

    Sunny day

    • 19
    • 28

    Sunny day

    • 18
    • 22

    Sunny day

    • 17
    • 21

    Sunny day

    • 15
    • 20

    Partly cloudy

Today 23 Jun London and South East England

Fine with further sunshine, temperatures continuing to increase to become hot. A warm and humid night to follow. Maximum temperature 35 °C.

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Portsmouth Harbour - Haslar Marina Temperature Statistics

June Temperature

Thorney Island (14km)

  • Lowest 11 June, 2026

    9 °C

  • Average June

    15.7 °C

  • Highest 19 June, 2026

    23.4 °C

Climate (2021–2026)

Thorney Island (14km)

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  • Average Low 2021–2026

    8.9 °C

  • Average 2021–2026

    12.2 °C

  • Average High 2021–2026

    15.3 °C
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