The 2025 event has concluded.

Portsmouth Coastal Waterside Marathon

Portsmouth, England, UK • December 21, 2025

Race Day Weather

rain
49°
51° high
Breezy
Light rain likely

Cool, wet conditions, steady breeze

Runners will face temperatures starting at 49°F and peaking at 51°F, with high humidity at 92%. Light rain is expected throughout, with a consistent wind from the E at 12 mph. Participants should adjust their pace conservatively due to the cool, wet conditions and stay mindful of hydration.

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Area Map

Course Map

Course Map Unavailable

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FAQ

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When is the 2025 Portsmouth Coastal Waterside Marathon?

The 2025 Portsmouth Coastal Waterside Marathon will be held on Sunday December 21, 2025.

What is the time limit for the Portsmouth Coastal Waterside Marathon?

The time limit for the Portsmouth Coastal Waterside Marathon is 7.25 hours.

Historical Weather

Based on 1 years of data
Avg Temp
45°F
L:42° H:45°
RunScore
5
Conditions
Rain Freq
0%
0 of 1 yrs
Wind17mph
Dew34°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore

2024 Portsmouth Coastal Waterside Marathon

Partly cloudy throughout the day.

2024
partly-cloudy-day
42°/45°-
6
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