Portsmouth Harbour - Fareham Marina Weather Forecast

    • 14
    • 20

    Sunny day

    • 14
    • 22

    Partly cloudy

    • 15
    • 25

    Sunny day

    • 17
    • 25

    Sunny day

    • 17
    • 26

    Sunny day

    • 15
    • 27

    Sunny day

    • 14
    • 24

    Sunny day

Today 21 May London and South East England

A mostly cloudy but dry start to the day. Cloud breaking up through the morning, allowing warm and sunny spells to develop. Winds mostly light. Maximum temperature 24 °C.

Tonight 21 May London and South East England

Dry overnight with some cloud around to start the evening, but long clear spells soon developing through the night. Mild with light winds. Minimum temperature 15 °C.

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Portsmouth Harbour - Fareham Marina Temperature Statistics

May Temperature

Thorney Island (18km)

  • Lowest 12 May, 2026

    2 °C

  • Average May

    11.8 °C

  • Highest 9 May, 2026

    21.2 °C

Climate (2021–Present)

Thorney Island (18km)

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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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