Southampton · days 1-14 from weather models · days 15-30 typical range (1991-2020)
🗺️ 14-day forecast map
Southampton & nearby cities — press play
Real forecast data for every city shown, from the same weather models as the city pages, updated several times a day. Icons show each day’s overall weather; the figure is the daytime maximum.
Next 14 days at a glance
From the model forecast
Warmest day
25°
Mon 14 Sep
Coldest night
6°
Thu 24 Sep
Days with rain
3 / 14
of 14 forecast days
Best day out
Fri 25 Sep
mild, dry & light wind
The next 4 weekends
For planning ahead
Sat 19 – Sun 20 Sep
20° 12°
80% rain risk
Sat 26 Sep
21° 11°
7% rain risk
Sat 3 – Sun 4 Oct
18° 11°
typical range
Sat 10 – Sun 11 Oct
16° 10°
typical range
30 days — Southampton
14 real + 16 synthesised
Sun · Today Showers
23°16°5.4 mm⌄
Wind12 mph W
Gusts26 mph
UV index1 – Low
Chance of rain87%
Sunrise06:38
Sunset19:25
Mon · Tomorrow Fog
25°17°0.5 mm⌄
Wind14 mph SW
Gusts19 mph
UV index4 – Moderate
Chance of rain54%
Sunrise06:39
Sunset19:22
Tuesday 15/9 Sunny
21°12°0.1 mm⌄
Wind18 mph W
Gusts25 mph
UV index3 – Low
Chance of rain22%
Sunrise06:41
Sunset19:20
Wednesday 16/9 Cloudy
17°10°15%⌄
Wind12 mph NW
Gusts21 mph
UV index3 – Moderate
Chance of rain15%
Sunrise06:42
Sunset19:18
Thursday 17/9 Cloudy
19°11°1.0 mm⌄
Wind17 mph W
Gusts28 mph
UV index4 – Moderate
Chance of rain61%
Sunrise06:44
Sunset19:15
Friday 18/9 Cloudy
19°9°16%⌄
Wind14 mph W
Gusts22 mph
UV index5 – Moderate
Chance of rain16%
Sunrise06:45
Sunset19:13
Saturday 19/9 Cloudy
20°15°24%⌄
Wind13 mph SW
Gusts25 mph
UV index5 – Moderate
Chance of rain24%
Sunrise06:47
Sunset19:11
Sunday 20/9 Cloudy
18°12°2.7 mm⌄
Wind12 mph NE
Gusts19 mph
UV index4 – Moderate
Chance of rain80%
Sunrise06:48
Sunset19:09
Monday 21/9 Sunny intervals
21°11°14%⌄
Wind10 mph SW
Gusts16 mph
UV index6 – High
Chance of rain14%
Sunrise06:50
Sunset19:06
Tuesday 22/9 Sunny
22°13°10%⌄
Wind10 mph NW
Gusts22 mph
UV index6 – High
Chance of rain10%
Sunrise06:52
Sunset19:04
Wednesday 23/9 Cloudy
17°9°14%⌄
Wind15 mph N
Gusts25 mph
UV index4 – Moderate
Chance of rain14%
Sunrise06:53
Sunset19:02
Thursday 24/9 Cloudy
18°6°10%⌄
Wind8 mph NE
Gusts13 mph
UV index4 – Moderate
Chance of rain10%
Sunrise06:55
Sunset19:00
Friday 25/9 Sunny
21°9°3%⌄
Wind8 mph NE
Gusts13 mph
UV index6 – High
Chance of rain3%
Sunrise06:56
Sunset18:57
Saturday 26/9 Sunny
21°11°7%⌄
Wind12 mph NE
Gusts21 mph
UV index6 – High
Chance of rain7%
Sunrise06:58
Sunset18:55
Monday 28/9 Rain (climate average)
25°16°4.8 mm⌄
Day≈22–28°
Night≈13–19°
Rain≈55 mm / September
(climate average)Typical range for these dates · 1991–2020
Tuesday 29/9 Sunny intervals (climate average)
26°17°20%⌄
Day≈23–29°
Night≈14–20°
Rain≈55 mm / September
(climate average)Typical range for these dates · 1991–2020
Wednesday 30/9 Sunny intervals (climate average)
27°18°20%⌄
Day≈24–30°
Night≈15–21°
Rain≈55 mm / September
(climate average)Typical range for these dates · 1991–2020
Thursday 1/10 Rain (climate average)
21°13°3.2 mm⌄
Day≈18–24°
Night≈10–16°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Friday 2/10 Sunny intervals (climate average)
18°11°20%⌄
Day≈15–21°
Night≈8–14°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Saturday 3/10 Sunny intervals (climate average)
18°12°20%⌄
Day≈15–21°
Night≈9–15°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Sunday 4/10 Rain (climate average)
17°11°5.2 mm⌄
Day≈14–20°
Night≈8–14°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Monday 5/10 Sunny intervals (climate average)
20°13°20%⌄
Day≈17–23°
Night≈10–16°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Tuesday 6/10 Sunny intervals (climate average)
22°14°20%⌄
Day≈19–25°
Night≈11–17°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Wednesday 7/10 Rain (climate average)
20°13°2.8 mm⌄
Day≈17–23°
Night≈10–16°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Thursday 8/10 Sunny intervals (climate average)
20°13°20%⌄
Day≈17–23°
Night≈10–16°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Friday 9/10 Sunny intervals (climate average)
18°12°20%⌄
Day≈15–21°
Night≈9–15°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Saturday 10/10 Rain (climate average)
16°10°3.2 mm⌄
Day≈13–19°
Night≈7–13°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Sunday 11/10 Sunny intervals (climate average)
16°11°20%⌄
Day≈13–19°
Night≈8–14°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Monday 12/10 Sunny intervals (climate average)
19°12°20%⌄
Day≈16–22°
Night≈9–15°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Tuesday 13/10 Rain (climate average)
23°14°4.3 mm⌄
Day≈20–26°
Night≈11–17°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
How does the long-range forecast work?
Days 1-14 are a real forecast from weather models. Days 15-30 are season-typical values based on 1991-2020 climate averages — good for planning, NOT an exact forecast that far ahead.
Days 1-14: Fetched live from weather models (UKV, ECMWF, GFS) with statistical correction. Reliability ~85% for days 1-3, ~60% for days 7-10, ~45% for days 11-14.
Days 15-30: A real forecast does not exist that far ahead (a chaotic system). Instead we show season-typical values: the month’s average max/min from 1991-2020 climate data (London baseline with latitude correction for Southampton), with mild weekly variation.
Use: "Roughly how warm is it usually in London in the last week of July?" — a good question for days 15-30. "Will it rain on 27 May?" — no serious forecast can say.
Forecasts from the UK Met Office UKV model, global weather models and official UK environmental data · Met Office UKV model · Environment Agency · Copernicus CAMS · NOAA