Portsmouth Coastal Waterside Marathon
Race Day Weather
Cool start, strong winds ahead
Runners will face a steady temperature from 48°F to 49°F throughout the race. Winds will be from the WSW at 21 mph, with gusts reaching 29 mph, creating a challenging headwind. With humidity at 80%, maintaining hydration is essential, and runners should consider pacing adjustments to combat the wind.
Pace Calculator
Get forecast alerts for Portsmouth Coastal Waterside Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
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.
