The 2025 event has concluded.

Suffolk County Marathon

East Islip, NY, USA • October 19, 2025
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partly-cloudy-day Partly cloudy throughout the day.

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When is the 2025 Suffolk County Marathon?

The 2025 Suffolk County Marathon will be held on Sunday October 19, 2025.

Is the Suffolk County Marathon a Boston Marathon Qualfier?

Yes, the Suffolk County Marathon is an official Boston Marathon qualifier.

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Historical Weather & Results

RunScore
Run Score: 7
Temp
62°F
Min/Max
52°/63°F
Dew
47°F
Days of Rain
2/5
Wind
12mph
Tap a row for details.
YearLow / HighRain

Suffolk County Marathon 2024 Weather History

Clear conditions throughout the day.

2024
clear-day
48°/ 74°-
Run Score: 8

Suffolk County Marathon 2023 Weather History

Partly cloudy throughout the day.

2023
partly-cloudy-day
51°/ 57°-
Run Score: 7

Suffolk County Marathon 2022 Weather History

Cloudy skies throughout the day with rain.

2022
cloudy
57°/ 61°Light
Run Score: 8

Suffolk County Marathon 2021 Weather History

Becoming cloudy in the afternoon.

2021
partly-cloudy-day
44°/ 59°-
Run Score: 8

Suffolk County Marathon 2019 Weather History

Partly cloudy throughout the day with rain in the morning and afternoon.

2019
rain
58°/ 63°Moderate
Run Score: 5
You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR
You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR