racecast.ioPartly cloudy throughout the day.
Details
Pre-Race
Race
Post-Race
No slip. No bounce. Polarized sunglasses built for the run. Goodr OG Sunglasses.
When you buy through our links, we may earn a commission.
Wanna to know when the weather changes? .
Race Overview
The Big Half is a half marathon through central and southeast London, organized by London Marathon Events, the team behind the TCS London Marathon. First held in 2018, the race starts on The Highway near the north side of Tower Bridge, loops east through Limehouse toward Canary Wharf, then crosses Tower Bridge and runs through Bermondsey, Rotherhithe, and Deptford to finish beside the Cutty Sark in Greenwich. The half is the centerpiece of a community-focused race day that also includes the one-mile Big Mile fun run and the New Balance Big Relay team event.
WikipediaFAQ
When is the 2027 The Big Half?
The 2027 The Big Half will be held on Sunday September 5, 2027.
Is the The Big Half a Boston Marathon Qualfier?
No, the The Big Half is NOT a Boston Marathon qualifier.
The Big Half Course Map
Loading Course Map...
The Big Half Weather History
The Big Half Weather Averages
Average Temp: 60°, Average Low: 53°, Average High: 69°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|
| Temp | 59° | 61° | 63° | 65° | 67° | 67° | 68° |
| Feel | 57° | 58° | 61° | 63° | 66° | 67° | 67° |
| Rain | - | - | - | - | - | - | - |
| Wind | 11mph | 13mph | 13mph | 13mph | 13mph | 12mph | 12mph |
| Dew | 52° | 51° | 52° | 50° | 51° | 50° | 50° |
| RunScore |  | |  | | | | |
The Big Half 2026
Sep 6, 2026
Partly cloudy throughout the day.
Low: 59°, High: 81°, Light Rain
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|
| Temp | 64° | 68° | 72° |  75° | 77° | 79° |  80° |
| Feel | 64° | 68° | 72° | 75° | 77° | 79° | 80° |
| Rain | - | - | - | light | - | - | - |
| Wind | 6mph | 10mph | 10mph | 10mph | 12mph | 10mph | 12mph |
| Dew | 54° | 56° | 54° | 52° | 50° | 48° | 48° |
| RunScore |  | | | | | | |
The Big Half 2025
Sep 7, 2025
Partly cloudy throughout the day.
Low: 62°, High: 78°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|
| Temp | 66° | 70° | 72° | 78° | 77° | 77° | 75° |
| Feel | 66° | 70° | 72° | 78° | 77° | 77° | 75° |
| Rain | - | - | - | - | - | - | - |
| Wind | 8mph | 13mph | 16mph | 13mph | 15mph | 11mph | 13mph |
| Dew | 57° | 57° | 59° | 59° | 59° | 61° | 61° |
| RunScore | | |  | | | | |
The Big Half 2024
Sep 1, 2024
Clearing in the afternoon.
Low: 63°, High: 83°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|
| Temp | 67° | 70° | 71° | 76° | 80° | 83° | 83° |
| Feel | 67° | 70° | 71° | 76° | 80° | 84° | 85° |
| Rain | - | - | - | - | - | - | - |
| Wind | 8mph | 10mph | 10mph | 11mph | 10mph | 9mph | 10mph |
| Dew | 61° | 62° | 61° | 64° | 64° | 65° | 65° |
| RunScore | | | | | | | |
The Big Half 2023
Sep 3, 2023
Partly cloudy throughout the day.
Low: 57°, High: 80°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|
| Temp | 63° | 66° | 69° | 72° | 75° | 76° | 77° |
| Feel | 63° | 66° | 69° | 72° | 75° | 76° | 77° |
| Rain | - | - | - | - | - | - | - |
| Wind | 4mph | 4mph | 5mph | 5mph | 4mph | 3mph | 4mph |
| Dew | 59° | 59° | 58° | 58° | 59° | 58° | 57° |
| RunScore | | | | | | | |
The Big Half 2022
Sep 4, 2022
Partly cloudy throughout the day.
Low: 63°, High: 75°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|
| Temp | 66° | 69° | 69° | 70° | 73° | 73° | 74° |
| Feel | 66° | 69° | 69° | 70° | 73° | 73° | 74° |
| Rain | - | - | - | - | - | - | - |
| Wind | 8mph | 11mph | 12mph | 12mph | 11mph | 11mph | 11mph |
| Dew | 60° | 58° | 57° | 56° | 58° | 57° | 59° |
| RunScore | | | | | | | |
The Big Half 2021
Aug 22, 2021
Partly cloudy throughout the day with rain.
Low: 60°, High: 72°, Light Rain
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|
| Temp | 62° | 63° | 65° | 67° | 70° | 67° | 70° |
| Feel | 62° | 63° | 65° | 67° | 70° | 67° | 70° |
| Rain | - | - | - | - | light | - | - |
| Wind | 9mph | 9mph | 10mph | 9mph | 11mph | 10mph | 11mph |
| Dew | 58° | 58° | 61° | 59° | 59° | 58° | 59° |
| RunScore | | | | | | | |
The Big Half 2020
Mar 1, 2020
Partly cloudy throughout the day.
Low: 41°, High: 51°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 42° | 44° | 46° | 49° | 49° | 51° | 50° |
| Feel | 34° | 36° | 38° | 43° | 43° | 51° | 50° |
| Rain | - | - | - | - | - | - | - |
| Wind | 15mph | 16mph | 20mph | 19mph | 19mph | 19mph | 19mph |
| Dew | 33° | 33° | 34° | 36° | 30° | 31° | 30° |
| RunScore |  | | | | | | |
The Big Half 2019
Mar 10, 2019
Partly cloudy throughout the day with a chance of rain throughout the day.
Low: 37°, High: 51°, Moderate Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 51° |  51° | 49° | 49° |  49° | 51° | 51° |
| Feel | 51° | 51° | 41° | 42° | 42° | 51° | 51° |
| Rain | - | - | - | - | light | - | - |
| Wind | 19mph | 32mph | 30mph | 25mph | 27mph | 23mph | 24mph |
| Dew | 48° | 39° | 38° | 38° | 35° | 33° | 31° |
| RunScore | |  | | | | | |
The Big Half 2018
Mar 4, 2018
Partly cloudy throughout the day with early morning rain.
Low: 38°, High: 48°, Light Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 40° | 44° | 46° | 48° | 47° | 48° | 48° |
| Feel | 36° | 40° | 42° | 44° | 43° | 43° | 43° |
| Rain | - | - | - | - | light | - | - |
| Wind | 7mph | 7mph | 8mph | 8mph | 10mph | 10mph | 10mph |
| Dew | 40° | 43° | 42° | 42° | 42° | 42° | 43° |
| RunScore | | | | | | | |