Seabrook Island Half Marathon

Seabrook Island, SC, USA · November 21, 2026
partly-cloudy-day56°·62° high·Light·Rain possible
7
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Seabrook Island Half Marathon race day weather

partly-cloudy-day
56°at start
70° high
Light
Rain possible
Your goal
0:00:00

Cool start, steady conditions

Runners will face temperatures rising from 56°F at the start to 62°F by finish, with average humidity at 73%. Wind will be light at 6 mph from the east, not impacting performance significantly. Given the humidity, maintaining a steady pace and staying hydrated will be crucial for optimal performance.

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About the Seabrook Island Half Marathon

The Seabrook Island Half Marathon is a 13.1-mile road race held in November on Seabrook Island, South Carolina, about 28 miles from downtown Charleston. The USATF-certified course runs around the gated island's marsh, oceanfront and tree-lined roads and finishes at the Freshfields Village Green. It is flat, and the race puts its highest point at no more than 5 feet above sea level. A 5K runs the same morning, and the proceeds support programs of the Kiawah-Seabrook Exchange Club, the Charleston Animal Society and the Charleston Running Club.

Race weekend

Saturday, November 21
8:00 AMHalf Marathon (13.1 mi)
8:10 AM5K (3.1 mi)
Area Map
Course Map

Seabrook Island Half Marathon FAQ

When is the 2026 Seabrook Island Half Marathon?

The 2026 Seabrook Island Half Marathon will be held on Saturday November 21, 2026.

What will the weather be like for the 2026 Seabrook Island Half Marathon?

The forecast calls for a high of 70°F and a low of 53°F with a 32% chance of rain.

What is the weather usually like for the Seabrook Island Half Marathon?

Over the 4 years racecast.io has race-day weather for (2018 to 2024), it averaged 53°F at the start and 63°F by a typical finish. It has not rained during race hours in any of those years.

What was the hottest Seabrook Island Half Marathon?

Of the 4 years on record, 2023 was the warmest, reaching 73°F during race hours. The coldest start was 2024, at 44°F.

What was the windiest Seabrook Island Half Marathon?

Of the 4 years on record, 2024 was the windiest, with wind averaging 9 mph during race hours. The calmest was 2018, at 2 mph.

Seabrook Island Half Marathon weather history

Based on 4 years of data
Avg Temp
58°F
L:53° H:63°
RunScore
7
Conditions
Rain Freq
0%
0 of 4 yrs
Wind6mph
Dew50°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2024
clear-day
44°/53°-
10
2023
cloudy
64°/73°-
4
2020
partly-cloudy-day
59°/69°-
6
2018
clear-day
45°/57°-
9