Weymouth, Dorset
Weymouth is an autumn coastal race where sea conditions and wind can outweigh the mild air forecast.
Typical race window
Monthly climate normal from 2016-2025 archive data.
13°C-19°C
23 km/h
51 km/h
40%
A typical day in September averages 3.0 mm of precipitation, with average gusts around 47 km/h. Treat this as planning context, not a live forecast.
Jan
9°C
Feb
9°C
Mar
11°C
Apr
13°C
May
16°C
Jun
19°C
Jul
21°C
Aug
21°C
Sep
19°C
Oct
15°C
Nov
12°C
Dec
10°C
Beach chop, tide state and local marine guidance are the main swim checks.
Rolling Dorset roads can become more technical when wet or gusty.
The run is usually temperate, though wind chill and showers can affect comfort.
Live race-day forecast
This race page stays evergreen. For date, start time and expected segment durations, open the race-day planner with Weymouth, Dorset prefilled.