Portsmouth Coastal Waterside Marathon

Portsmouth, England, UKDecember 20, 2026

Race Day Weather

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47°
50° high
Breezy
Dry

Cool morning, steady breeze

Runners will face mild temperatures starting at 47°F and rising to 50°F. Wind will be a steady SW at 14 mph, with gusts reaching 28 mph. With high humidity at 87%, pacing should be conservative to maintain energy levels throughout the race.

Race day forecast available in 254 days
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Pace Calculator

Distance: 26.2mi
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Common Goals:

The Portsmouth Coastal Waterside Marathon offers runners a festive and scenic journey along the picturesque Southsea seafront and around Langstone Harbour. This flat, multi-terrain course combines road and coastal paths, providing a dynamic running experience with minimal elevation changes—just 108 meters over the entire marathon distance. As you run, you'll be treated to stunning sea views and pass key landmarks like the Tudor Sailing Club and Applegreen garage. The course is renowned for its lively atmosphere, featuring aid stations stocked with treats like jelly beans, Jaffa cakes, and savory snacks. Runners can also enjoy on-site massage and taping services to enhance their race day experience. Whether you're a seasoned marathoner or a novice, this race promises a memorable and accessible challenge amidst the vibrant coastal setting. Source

Area Map

Course Map

FAQ

When is the 2026 Portsmouth Coastal Waterside Marathon?

The 2026 Portsmouth Coastal Waterside Marathon will be held on Sunday December 20, 2026.

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

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

What will the weather be like for the 2026 Portsmouth Coastal Waterside Marathon?

The forecast calls for a high of 50°F and a low of 47°F with a 0% chance of rain.

Historical Weather

Based on 5 years of data
Avg Temp
48°F
L:46° H:48°
RunScore
6
Conditions
Rain Freq
60%
3 of 5 yrs
Wind15mph
Dew42°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
clear-day
49°/51°Light
8
2024
partly-cloudy-day
42°/45°-
6
2023
cloudy
49°/50°-
7
2022
partly-cloudy-day
40°/46°Light
5
2013
partly-cloudy-day
48°/50°Light
5