Fishbourne Channel - Dell Quay Weather Forecast, West Sussex PO18 8

Today 21 Dec London and South East England

Mostly dry with plenty of low cloud and some mist or hill fog at first. There may be some outbreaks of light rain or drizzle at times. This may turn more persistent late in the afternoon, with heavier bursts developing. Maximum Temperature 12C.

Tonight 21 Dec London and South East England

Outbreaks of rain and drizzle spreading north during the evening, perhaps heavy at times, but clearing most parts soon after midnight. Then turning drier for all, but staying rather cloudy and breezy. Minimum Temperature 6C.

Mon 22 Dec London and South East England

A dry, and rather mild, day with a light breeze. While a few brighter spells are possible, most parts will stay cloudy. Maximum Temperature 11C.

Tue 23 Dec London and South East England

Likely dry, but cloudy Tuesday, although very isolated showers possible in the west. Probably dry, and brighter Christmas Eve and Christmas Day. Also turning colder with a brisk breeze.

Wed 24 Dec London and South East England

Likely dry, but cloudy Tuesday, although very isolated showers possible in the west. Probably dry, and brighter Christmas Eve and Christmas Day. Also turning colder with a brisk breeze.

Thu 25 Dec London and South East England

Likely dry, but cloudy Tuesday, although very isolated showers possible in the west. Probably dry, and brighter Christmas Eve and Christmas Day. Also turning colder with a brisk breeze.

Fri 26 Dec London and South East England

Continued mostly settled conditions expected, as high pressure builds to the north of the UK. This will bring a strengthening easterly then northeasterly wind over the period, with wind-chill making it feel colder. Whilst there will be a fair amount of dry weather, a few showers will still be possible, particularly across eastern and southern parts which may be wintry in places, more especially over high ground. High pressure will likely dominate the weather in the run up to the New Year, slowly drifting to the west. This will maintain largely settled conditions, although with an increasing chance of showery conditions later in the period. Temperatures will be below average much of the time, with frost likely where clear skies and light winds prevail.

Sat 27 Dec London and South East England

Continued mostly settled conditions expected, as high pressure builds to the north of the UK. This will bring a strengthening easterly then northeasterly wind over the period, with wind-chill making it feel colder. Whilst there will be a fair amount of dry weather, a few showers will still be possible, particularly across eastern and southern parts which may be wintry in places, more especially over high ground. High pressure will likely dominate the weather in the run up to the New Year, slowly drifting to the west. This will maintain largely settled conditions, although with an increasing chance of showery conditions later in the period. Temperatures will be below average much of the time, with frost likely where clear skies and light winds prevail.

Fishbourne Channel - Dell Quay Weather Forecast

Today 21 Dec London and South East England

Tonight 21 Dec London and South East England

Mon 22 Dec London and South East England

Tue 23 Dec London and South East England

Wed 24 Dec London and South East England

Thu 25 Dec London and South East England

Fri 26 Dec London and South East England

Sat 27 Dec London and South East England

Temperature Forecast Met Office

Temperature Real-Time

Dean Hill (Wiltshire) Radar

National Satellite

National Synoptic

Fishbourne Channel - Dell Quay Temperature Statistics

December Temperature

Thorney Island (7km)

Lowest 4 January, 2025

Average 2025

Highest 12 August, 2025

Lowest 21 November, 2025

Average November

Highest 13 November, 2025

Lowest 5 December, 2025

Average December

Highest 7 December, 2025

Climate (2020–Present)

Thorney Island (7km)

Average Low 2020–2025

Average 2020–2025

Average High 2020–2025