Portsmouth Harbour - Haslar Marina Weather Forecast

    • 6
    • 13

    Light rain

    • 10
    • 13

    Cloudy

    • 10
    • 14

    Cloudy

    • 12
    • 13

    Light rain

    • 13
    • 15

    Light rain

    • 12
    • 15

    Partly cloudy

Today 15 May London and South East England

After a chilly start, it will be largely dry with variable cloud and bright or sunny spells. Breezy with a showers in the south and along the coast. Feeling cool. Maximum temperature 14 °C.

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Portsmouth Harbour - Haslar Marina Temperature Statistics

May Temperature

Thorney Island (14km)

  • Lowest 12 May, 2026

    2 °C

  • Average May

    11.8 °C

  • Highest 9 May, 2026

    21.2 °C

Climate (2021–Present)

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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