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Great South Run 2018 weather forecast

Runners in a road race

Runners competing in a road race

Sun 21 Oct 2018

This year's Great South Run takes place on 21 October in the naval city of Portsmouth.

Starting amid a sea of colour on Clarence Esplanade and with a beautiful, flat course that takes runners through the Portsmouth Historic Dockyard and along a route filed with bands and music, it's no wonder this is one of the world's leading 10 mile running events.

For runners, joggers and walkers, setting PB's, raising money for charity and getting fit, the Great South Run is part of a festival of sport with up to 30,000 people taking part in events across the weekend, including the Junior & Mini Great South Run and the Great South Run 5k, the day before the 10 mile event.

Runners will be hoping for cool, cloudy conditions with a slight breeze. Check the Portsmouth weather to help prepare for the event.

Back to the  events calendar.

  • Heavy rain 14 °C

    11 °C

  • Light shower day 14 °C

    7 °C

  • Sunny day 15 °C

    8 °C

  • Sunny intervals 15 °C

    12 °C

  • Sunny day 17 °C

    11 °C

  • Sunny day 19 °C

    11 °C

  • Sunny day 18 °C

    10 °C

Saturday (Saturday 22 September 2018)
Now 18:00 19:00 20:00 21:00 22:00 23:00
Warnings
Heavy rain Heavy rain Heavy rain Heavy rain Light rain Light rain Overcast
≥95% ≥95% 90% 80% 50% 50% 10%
Temperature (°C)
12 ° 13 ° 12 ° 13 ° 12 ° 12 ° 12 °
Show detail
Feels like temperature (°C)
9 ° 10 ° 10 ° 10 ° 10 ° 10 ° 10 °
Wind direction, speed & gust (mph)
E 13 23 E 12 21 E 14 25 ENE 13 25 ENE 14 27 NE 13 24 NE 11 21
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor)
M M M G G VG VG
Humidity
95% 90% 93% 91% 92% 92% 91%
UV index
1 1
Sunrise: 06:50 Sunset: 19:04 Moon phase: Waxing gibbous Air pollution: 2
Sunday (Sunday 23 September 2018)
00:00 01:00 02:00 03:00 04:00 05:00 06:00 07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00 20:00 21:00 22:00 23:00
Warnings
Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Light rain Cloudy Sunny intervals Sunny day Sunny day Sunny intervals Sunny day Clear night Clear night Clear night Clear night Clear night
10% 10% 10% 10% 10% 10% 20% 80% 90% ≥95% ≥95% ≥95% 50% 10% <5% <5% <5% <5% <5% <5% <5% <5% <5% <5%
Temperature (°C)
12 ° 12 ° 12 ° 12 ° 12 ° 12 ° 11 ° 11 ° 11 ° 11 ° 11 ° 10 ° 10 ° 11 ° 12 ° 13 ° 14 ° 14 ° 13 ° 12 ° 12 ° 11 ° 10 ° 10 °
Show detail
Feels like temperature (°C)
10 ° 10 ° 10 ° 10 ° 10 ° 10 ° 10 ° 10 ° 9 ° 9 ° 8 ° 7 ° 7 ° 8 ° 9 ° 10 ° 11 ° 11 ° 10 ° 10 ° 9 ° 8 ° 8 ° 7 °
Wind direction, speed & gust (mph)
NNE 11 19 NNE 10 17 NNE 9 15 NNE 8 15 NNE 8 14 NNE 8 14 NNE 8 14 NE 8 14 NNE 9 16 N 11 19 N 14 23 N 16 28 N 18 30 N 16 26 NNW 15 24 NNW 15 25 NNW 16 27 NNW 15 26 NNW 14 23 NNW 12 21 NNW 12 21 NNW 13 23 NNW 13 23 NNW 11 21
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor)
VG VG VG G G G G G M P P M VG VG VG VG VG VG VG VG VG VG VG VG
Humidity
91% 90% 92% 92% 91% 90% 89% 88% 90% 90% 89% 87% 83% 74% 66% 60% 54% 56% 58% 61% 64% 68% 71% 73%
UV index
1 1 1 1 1 2 2 2 2 2 1 1
Sunrise: 06:51 Sunset: 19:01 Moon phase: Waxing gibbous Air pollution: 2
Monday (Monday 24 September 2018)
00:00 01:00 04:00 07:00 10:00 13:00 16:00 19:00 22:00
Warnings
Clear night Clear night Clear night Clear night Sunny day Sunny day Sunny day Clear night Clear night
<5% <5% <5% <5% <5% <5% <5% <5% <5%
Temperature (°C)
9 ° 9 ° 8 ° 7 ° 10 ° 14 ° 15 ° 13 ° 10 °
Show detail
Feels like temperature (°C)
7 ° 6 ° 5 ° 5 ° 9 ° 12 ° 13 ° 12 ° 9 °
Wind direction, speed & gust (mph)
NNW 11 20 NNW 10 18 NNW 8 16 NNW 8 16 N 8 13 N 8 15 NNE 8 15 NNE 6 10 NNE 6 9
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor)
VG VG VG VG VG VG VG VG VG
Humidity
76% 79% 85% 89% 70% 47% 39% 55% 76%
UV index
2 4 2
Sunrise: 06:53 Sunset: 18:59 Moon phase: Waxing gibbous Air pollution: 2
Tuesday (Tuesday 25 September 2018)
01:00 04:00 07:00 10:00 13:00 16:00 19:00 22:00
Warnings
Clear night Clear night Clear night Sunny day Sunny intervals Sunny intervals Clear night Clear night
<5% <5% <5% <5% <5% <5% <5% <5%
Temperature (°C)
9 ° 8 ° 8 ° 13 ° 15 ° 15 ° 14 ° 13 °
Show detail
Feels like temperature (°C)
7 ° 7 ° 6 ° 12 ° 14 ° 14 ° 13 ° 12 °
Wind direction, speed & gust (mph)
NE 6 9 NE 6 9 ENE 6 10 E 7 13 SE 8 17 SSE 8 15 SSE 6 11 SE 7 11
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor)
VG VG VG VG VG VG VG VG
Humidity
80% 83% 83% 63% 55% 56% 69% 77%
UV index
2 3 1
Sunrise: 06:55 Sunset: 18:57 Moon phase: Full Air pollution: 2
Wednesday (Wednesday 26 September 2018)
01:00 04:00 07:00 10:00 13:00 16:00 19:00 22:00
Warnings
Clear night Clear night Clear night Sunny day Sunny day Sunny day Clear night Clear night
<5% <5% <5% <5% <5% <5% <5% <5%
Temperature (°C)
13 ° 13 ° 12 ° 15 ° 17 ° 17 ° 15 ° 14 °
Show detail
Feels like temperature (°C)
12 ° 12 ° 12 ° 15 ° 15 ° 15 ° 14 ° 13 °
Wind direction, speed & gust (mph)
SSE 6 11 SSE 5 10 SSE 6 10 SSW 6 11 SSW 8 16 SSW 8 15 SSW 6 11 SSW 5 9
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor)
VG VG VG VG VG VG VG VG
Humidity
82% 83% 83% 66% 58% 59% 78% 84%
UV index
2 4 2
Sunrise: 06:56 Sunset: 18:54 Moon phase: Full Air pollution: 3
Thursday (Thursday 27 September 2018)
01:00 04:00 07:00 10:00 13:00 16:00 19:00 22:00
Warnings
Clear night Clear night Clear night Sunny day Sunny day Sunny day Clear night Clear night
<5% <5% <5% <5% <5% <5% <5% <5%
Temperature (°C)
13 ° 12 ° 12 ° 16 ° 19 ° 19 ° 16 ° 14 °
Show detail
Feels like temperature (°C)
12 ° 11 ° 11 ° 15 ° 18 ° 18 ° 16 ° 13 °
Wind direction, speed & gust (mph)
WSW 5 8 WSW 5 8 WSW 5 8 S 5 10 SSW 6 14 SW 7 13 SW 7 10 NNW 7 11
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor)
VG G G VG VG VG VG G
Humidity
89% 93% 94% 80% 68% 66% 85% 90%
UV index
2 4 1
Sunrise: 06:58 Sunset: 18:52 Moon phase: Full
Friday (Friday 28 September 2018)
01:00 04:00 07:00 10:00 13:00 16:00 19:00 22:00
Warnings
Clear night Clear night Clear night Sunny day Sunny day Sunny day Clear night Clear night
<5% <5% <5% <5% <5% <5% <5% <5%
Temperature (°C)
13 ° 12 ° 12 ° 14 ° 17 ° 17 ° 15 ° 13 °
Show detail
Feels like temperature (°C)
11 ° 11 ° 10 ° 13 ° 15 ° 15 ° 13 ° 10 °
Wind direction, speed & gust (mph)
NE 8 12 NE 9 14 NE 10 16 NE 11 19 NE 13 23 NE 12 22 NE 12 18 NE 13 20
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor)
G G G VG VG VG VG VG
Humidity
92% 91% 91% 79% 65% 63% 71% 77%
UV index
2 3 1
Sunrise: 06:59 Sunset: 18:50 Moon phase: Waning gibbous
< Portsmouth last 24 hours Issued at:

21 October - What conditions will the runners be facing as they complete the Great South Run in Portsmouth?

To find out more about the race and how to enter, visit the  Great South Run official website.

 

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