Half Marathon-by-the-Sea

Manchester-by-the-Sea, MA, USA · September 12, 2027
partly-cloudy-day64°·65° high·Breezy·Dry
5
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Race Day Weather

partly-cloudy-day
64°at start
66° high
Breezy
Dry
Your goal
0:00:00

Mild temps, adjust for wind shifts

Runners will face mild temperatures of 64°F at the start and 65°F by finish. With a max wind of 13 mph from the NNE, expect tailwinds in Mile 1, transitioning to headwinds in Miles 6 and 13-14. Given the high humidity at 78%, pacing adjustments are recommended, especially during tougher segments where headwinds will impact performance.

Race day forecast available in 305 days
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A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.

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Race Info

Half Marathon-by-the-Sea is a USATF-certified 13.1-mile road race held each September in Manchester-by-the-Sea, Massachusetts, on the North Shore. The course starts and finishes at Manchester Essex Regional High School and runs through the town's historic downtown before passing freshwater lakes in neighboring Hamilton. The race has run in-person since at least 2014, aside from a virtual-only 2020 edition, with a field capped at 750 runners.

FAQ

When is the 2027 Half Marathon-by-the-Sea?

The 2027 Half Marathon-by-the-Sea will be held on Sunday September 12, 2027.

What is the time limit for the Half Marathon-by-the-Sea?

The time limit for the Half Marathon-by-the-Sea is 3 hours.

What will the weather be like for the 2027 Half Marathon-by-the-Sea?

The forecast calls for a high of 68°F and a low of 63°F with a 7% chance of rain.

Historical Weather

Based on 6 years of data
Avg Temp
64°F
L:60° H:66°
RunScore
6
Conditions
Rain Freq
17%
1 of 6 yrs
Wind6mph
Dew52°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
cloudy
65°/65°Light
5
2025
partly-cloudy-day
64°/70°-
5
2024
partly-cloudy-day
64°/73°-
5
2023
clear-day
62°/70°-
5
2022
clear-day
57°/63°-
7
2020
clear-day
50°/57°-
9