Running Pace Calculator — Min/km, Finish Time & Pace Chart
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| Race | 2027 Southampton Marathon - May 2 |
|---|---|
| City | Southampton |
| Date | 2027-05-02 at 09:00 |
| Time Limit | 6 hours |
| Cutoff pace | 8:32/km |
| Timezone | Europe/London |
| Official Site | ReesLeisure (ABP Southampton Marathon Festival) |
| Registration | Register |
| Average Temperature | 10.5°C / 51°F |
|---|---|
| Humidity | 83% |
| Wind | 23 km/h |
| Rain Chance | 37% |
| Typical Conditions | Mild, breezy early-May morning on England's south coast. Expect around 13C (55F) at the 09:00 start, rising into the mid-teens by mid-morning, with high coastal humidity and a fair chance of a sea breeze off Southampton Water. May is one of the drier months, so heavy rain is less likely than a passing shower. |
What to Prepare: Dress for low-to-mid teens Celsius with a throwaway top layer for the start corral at Dock Gate 8. The exposed bridge crossings and waterfront stretches can be windy, so a light cap and lip balm help. May is mild rather than hot, but the two-lap layout means full sun exposure builds in the second half.
Based on historical averages for race week. Use our Weather Score Calculator and What to Wear Guide for personalized advice.
Wind at 23 km/h can affect your marathon pace by 5-15 seconds per kilometer. Headwinds slow you down exponentially — a 20 km/h wind costs more than twice a 10 km/h wind.
Calculate your wind-adjusted pace →Based on 20 years of race-week weather (2005-2024), MERRA-2 reanalysis
| Cooler | Typical | Warmer | |
|---|---|---|---|
| Temperature | 7.7°C | 10.5°C | 13.4°C |
| Dew point | 3.6°C | 7.8°C | 10.8°C |
Data: NASA POWER (MERRA-2 reanalysis), NASA Langley Research Center
| Course Type | Two-lap city loop, closed roads, waterfront |
|---|---|
| Elevation Gain | 250m |
| Terrain | Road |
| Profile | Honestly rolling rather than flat. Runners cross the Itchen Bridge four times (twice per lap) and tackle a noticeable climb up Burgess Road toward the University before a descent through Southampton Common. Independent course analyses put total ascent in a broad 150-350m range; a conservative real-world estimate is around 250m, with the gradient concentrated on the bridge and Burgess Road. Pace it as a strong-effort race, not a guaranteed PB. |
| Boston Qualifier | Yes — Check your BQ time |
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