Partly cloudy throughout the day.
Light Rain
25%
Wind
20mph
Light Rain
25%
Wind
20mph
Details
Light Rain
30%
Wind
20mph
Light Rain
25%
Wind
20mph
Light Rain
30%
Wind
20mph
Light Rain
25%
Wind
20mph
Light Rain
30%
Wind
20mph
Wind
20mph
Wind
20mph
Light Rain
25%
Wind
21mph
Wind
21mph
Wind
21mph
Light Rain
25%
Wind
20mph
Pre-Race
Race
Post-Race
Our favorite marathon tested handheld water bottle. Nathan SpeedDraw Plus Insulated Flask.
When you buy through our links, we may earn a commission.
Wanna to know when the weather changes? .
Race Overview
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.
WikipediaFAQ
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.
Portsmouth Coastal Waterside Marathon Weather History
Portsmouth Coastal Waterside Marathon Weather Averages
Average Temp: 47°, Average Low: 44°, Average High: 50°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|
| Temp | 46° | 46° | 47° | 47° | 48° | 48° | 48° |
| Feel | 40° | 42° | 43° | 43° | 44° | 44° | 44° |
| Rain | - | - | - | - | - | - | - |
| Wind | 12mph | 13mph | 13mph | 15mph | 15mph | 16mph | 15mph |
| Dew | 41° | 42° | 42° | 42° | 41° | 42° | 42° |
| RunScore |
Portsmouth Coastal Waterside Marathon 2025
Dec 21, 2025
Partly cloudy throughout the day with a chance of rain throughout the day.
Low: 48°, High: 52°, Moderate Rain
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|
| Temp | |||||||
| Feel | 46° | 46° | 50° | 51° | 51° | 51° | 50° |
| Rain | - | - | light | - | - | - | light |
| Wind | 6mph | 8mph | 8mph | 10mph | 11mph | 11mph | 11mph |
| Dew | 47° | 48° | 48° | 48° | 47° | 47° | 48° |
| RunScore |
Portsmouth Coastal Waterside Marathon 2024
Dec 22, 2024
Partly cloudy throughout the day.
Low: 40°, High: 45°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|
| Temp | |||||||
| Feel | 36° | 36° | 34° | 35° | 36° | 36° | 37° |
| Rain | - | - | - | - | - | - | - |
| Wind | 10mph | 15mph | 18mph | 12mph | 17mph | 18mph | 17mph |
| Dew | 33° | 32° | 33° | 35° | 31° | 32° | 34° |
| RunScore |
Portsmouth Coastal Waterside Marathon 2023
Dec 17, 2023
Cloudy skies throughout the day.
Low: 49°, High: 51°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|
| Temp | |||||||
| Feel | 45° | 50° | 50° | 50° | 50° | 50° | 50° |
| Rain | - | - | - | - | - | - | - |
| Wind | 12mph | 13mph | 13mph | 17mph | 15mph | 16mph | 14mph |
| Dew | 44° | 45° | 45° | 44° | 44° | 44° | 44° |
| RunScore |
Portsmouth Coastal Waterside Marathon 2022
Dec 18, 2022
Partly cloudy throughout the day with rain.
Low: 39°, High: 51°, Heavy Rain
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|
| Temp | |||||||
| Feel | 34° | 36° | 37° | 36° | 38° | 40° | 40° |
| Rain | - | light | light | light | light | moderate | light |
| Wind | 10mph | 10mph | 10mph | 13mph | 14mph | 12mph | 13mph |
| Dew | 37° | 39° | 41° | 42° | 44° | 45° | 45° |
| RunScore |
Portsmouth Coastal Waterside Marathon 2013
Dec 22, 2013
Clearing in the afternoon with a chance of rain throughout the day.
Low: 44°, High: 51°, Moderate Rain
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|
| Temp | |||||||
| Feel | 41° | 41° | 44° | 42° | 44° | 42° | 42° |
| Rain | - | - | - | moderate | - | - | - |
| Wind | 20mph | 18mph | 16mph | 23mph | 19mph | 23mph | 21mph |
| Dew | 44° | 44° | 45° | 42° | 42° | 40° | 41° |
| RunScore |