Nantucket Half Marathon
Race Day Weather
Cool start, mild finish
Runners will face a temperature range from 49°F at the start to a mild 63°F by the finish. Winds will be from the SE at 14 mph, providing a moderate challenge. With humidity at 68%, hydration should be prioritized, especially as temperatures rise. A light layer may be advisable during pre-race due to the cooler feels-like temperature.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for Nantucket Half Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Get your personalized Nantucket Half Marathon race plan
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.
Race Info
The Nantucket Half Marathon is an annual road race held each October on Nantucket Island, Massachusetts. The course starts and finishes at Bartlett's Farm and runs along beach roads, bike paths, and neighborhood streets, passing the Smooth Hummocks Coastal Preserve. A kids fun run takes place alongside the half marathon. The race is organized by the Nantucket Athletic Association, formerly the Nantucket Triathlon Club.
