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Great Bristol Half Marathon 2018 weather forecast

Runners taking part in a half marathon

Sun 23 Sep 2018

The Great Bristol Half Marathon on 23 September has become a long-held tradition in the national running calendar. Over 10,000 runners take part each year, making this a must do event with an atmosphere second to none.

The course starts at Bristol's historic Harbourside, taking in views around Bristol before returning to the Harbourside for the finish.

Check the official Great Bristol Half Marathon website for more information.

You can check the weather forecast for other events through the Events calendar.

  • Cloudy 19 °C

    16 °C

  • Cloudy 21 °C

    17 °C

  • Cloudy 20 °C

    17 °C

  • Cloudy 22 °C

    16 °C

  • Sunny intervals 22 °C

    16 °C

  • Sunny intervals 22 °C

    14 °C

  • Cloudy 20 °C

    13 °C

Friday (Friday 17 August 2018)
Now 20:00 21:00 22:00 23:00
Warnings
Cloudy Cloudy Overcast Partly cloudy night Cloudy
10% 10% 10% <5% <5%
Temperature (°C)
18 ° 18 ° 17 ° 17 ° 17 °
Show detail
Feels like temperature (°C)
16 ° 16 ° 16 ° 16 ° 16 °
Wind direction, speed & gust (mph)
WSW 13 25 WSW 11 22 WSW 10 21 WSW 10 22 WSW 9 22
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor)
G G G VG VG
Humidity
71% 75% 80% 80% 82%
UV index
1 1
Sunrise: 05:58 Sunset: 20:29 Moon phase: Waxing crescent Air pollution: 2 Pollen: L
Saturday (Saturday 18 August 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 Light rain Light rain Cloudy Overcast Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Sunny intervals Sunny intervals Sunny intervals Sunny intervals Cloudy Cloudy Cloudy Cloudy Overcast Overcast
10% 10% 40% 50% 10% 10% 10% 20% 10% 10% 10% 10% 10% <5% <5% <5% <5% <5% <5% <5% <5% 10% 10% 10%
Temperature (°C)
17 ° 17 ° 17 ° 17 ° 17 ° 17 ° 17 ° 17 ° 17 ° 18 ° 18 ° 19 ° 20 ° 20 ° 20 ° 21 ° 21 ° 20 ° 20 ° 20 ° 19 ° 19 ° 19 ° 19 °
Show detail
Feels like temperature (°C)
16 ° 16 ° 16 ° 16 ° 16 ° 16 ° 16 ° 16 ° 16 ° 17 ° 17 ° 17 ° 17 ° 18 ° 18 ° 18 ° 19 ° 19 ° 18 ° 18 ° 18 ° 18 ° 18 ° 18 °
Wind direction, speed & gust (mph)
WSW 10 22 SW 8 18 SW 8 17 SW 8 17 SW 8 18 SW 8 18 SW 8 18 SW 8 18 SW 8 17 WSW 9 19 WSW 10 21 WSW 12 24 WSW 13 26 WSW 13 26 WSW 13 25 W 13 24 W 12 24 W 12 22 W 11 21 W 10 20 WSW 9 18 WSW 8 17 WSW 7 15 SW 8 16
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor)
G VG G G G G G G G G G VG VG VG VG VG VG VG VG VG VG VG G VG
Humidity
83% 83% 84% 86% 86% 86% 87% 87% 86% 85% 82% 75% 72% 70% 69% 68% 67% 71% 74% 78% 82% 85% 86% 86%
UV index
1 1 2 3 3 4 5 4 3 2 2 1 1 1
Sunrise: 06:00 Sunset: 20:27 Moon phase: First quarter Air pollution: 2 Pollen: L
Sunday (Sunday 19 August 2018)
00:00 01:00 04:00 07:00 10:00 13:00 16:00 19:00 22:00
Warnings
Overcast Cloudy Cloudy Overcast Overcast Light rain Overcast Cloudy Cloudy
10% 10% 10% 10% 60% 50% 10% 10% 10%
Temperature (°C)
18 ° 18 ° 17 ° 17 ° 19 ° 19 ° 20 ° 19 ° 18 °
Show detail
Feels like temperature (°C)
18 ° 18 ° 16 ° 16 ° 17 ° 17 ° 18 ° 18 ° 18 °
Wind direction, speed & gust (mph)
SW 7 15 SW 8 17 SSW 10 20 SSW 12 25 SW 13 27 WSW 16 31 W 14 28 W 11 21 W 9 17
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor)
G G VG G G G G G G
Humidity
86% 86% 87% 87% 86% 85% 82% 84% 90%
UV index
1 2 4 2 1
Sunrise: 06:02 Sunset: 20:25 Moon phase: First quarter Air pollution: 1 Pollen: L
Monday (Monday 20 August 2018)
01:00 04:00 07:00 10:00 13:00 16:00 19:00 22:00
Warnings
Cloudy Overcast Overcast Cloudy Cloudy Sunny intervals Sunny intervals Cloudy
10% 10% 10% 10% 10% 10% <5% 10%
Temperature (°C)
18 ° 18 ° 18 ° 20 ° 21 ° 21 ° 20 ° 18 °
Show detail
Feels like temperature (°C)
17 ° 17 ° 18 ° 19 ° 20 ° 20 ° 19 ° 18 °
Wind direction, speed & gust (mph)
W 8 15 WSW 7 13 WSW 7 14 WSW 9 18 WSW 10 21 W 12 24 W 11 21 W 8 16
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor)
G G G G VG VG VG VG
Humidity
93% 95% 94% 86% 81% 79% 81% 89%
UV index
1 2 5 3 1
Sunrise: 06:03 Sunset: 20:23 Moon phase: First quarter Air pollution: 2 Pollen: L
Tuesday (Tuesday 21 August 2018)
01:00 04:00 07:00 10:00 13:00 16:00 19:00 22:00
Warnings
Cloudy Cloudy Sunny intervals Cloudy Cloudy Sunny intervals Sunny day Clear night
10% 10% 10% 10% 10% 10% <5% <5%
Temperature (°C)
17 ° 17 ° 17 ° 19 ° 21 ° 22 ° 20 ° 18 °
Show detail
Feels like temperature (°C)
17 ° 17 ° 17 ° 19 ° 20 ° 21 ° 19 ° 17 °
Wind direction, speed & gust (mph)
WSW 6 11 WSW 5 10 WSW 5 9 WSW 6 14 WSW 8 16 WSW 9 19 WSW 9 19 WSW 8 16
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor)
G G G G VG VG VG VG
Humidity
90% 93% 93% 83% 73% 68% 73% 86%
UV index
1 2 5 3 1
Sunrise: 06:05 Sunset: 20:21 Moon phase: First quarter Air pollution: 2 Pollen: L
Wednesday (Wednesday 22 August 2018)
01:00 04:00 07:00 10:00 13:00 16:00 19:00 22:00
Warnings
Cloudy Overcast Cloudy Sunny intervals Sunny intervals Sunny intervals Sunny day Clear night
10% 10% 10% 10% 10% 10% 10% <5%
Temperature (°C)
17 ° 17 ° 17 ° 18 ° 20 ° 21 ° 20 ° 17 °
Show detail
Feels like temperature (°C)
17 ° 17 ° 16 ° 18 ° 20 ° 20 ° 19 ° 17 °
Wind direction, speed & gust (mph)
WSW 7 13 WSW 7 12 WSW 7 13 W 8 17 W 8 18 W 9 19 WNW 8 16 WNW 7 12
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor)
G G G G VG VG VG VG
Humidity
91% 92% 91% 83% 74% 66% 67% 78%
UV index
1 3 5 3 1
Sunrise: 06:06 Sunset: 20:19 Moon phase: Waxing gibbous
Thursday (Thursday 23 August 2018)
01:00 04:00 07:00 10:00 13:00 16:00 19:00 22:00
Warnings
Partly cloudy night Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy
<5% 10% 10% 10% 10% 10% 10% 10%
Temperature (°C)
15 ° 14 ° 14 ° 17 ° 19 ° 20 ° 19 ° 16 °
Show detail
Feels like temperature (°C)
15 ° 14 ° 13 ° 16 ° 18 ° 18 ° 17 ° 16 °
Wind direction, speed & gust (mph)
NW 6 10 NW 5 9 NW 5 8 NNW 6 13 W 7 17 W 9 19 W 9 17 W 7 13
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor)
VG G G VG VG VG VG VG
Humidity
82% 85% 88% 74% 63% 62% 67% 76%
UV index
1 3 4 2 1
Sunrise: 06:08 Sunset: 20:17 Moon phase: Waxing gibbous
< Bristol last 24 hours Issued at:

23 September - Will you be cheering on the Great Bristol Half Marathon competitors? Check the weather forecast.

Weather for runners

Runners will be looking for a fine day to help them get around the course. A mild, but not hot, day with a light breeze will be wanted by both runners and spectators alike.

Back to the events calendar.

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