Suffolk County Marathon
East Islip, NY, USA · October 18, 2026
Race Day Weather
52°at start
63° high
Breezy
Dry
Cool conditions, steady race pace
Runners will face a temperature rising from 52°F to 63°F, with a steady wind from the SW at 12 mph, gusting to 25 mph. With humidity at 61% and a dew point of 45°F, conditions are favorable for maintaining a consistent pace. Runners should prepare for slight gusts but can push their efforts without concern for precipitation.
Race day forecast available in 162 days
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FAQ
When is the 2026 Suffolk County Marathon?
The 2026 Suffolk County Marathon will be held on Sunday October 18, 2026.
Is the Suffolk County Marathon a Boston Marathon Qualifier?
Yes, the Suffolk County Marathon is an official Boston Marathon qualifier.
What is the time limit for the Suffolk County Marathon?
The time limit for the Suffolk County Marathon is 6.5 hours.
What will the weather be like for the 2026 Suffolk County Marathon?
The forecast calls for a high of 63°F and a low of 50°F with a 0% chance of rain.
Historical Weather
Based on 6 years of data
Avg Temp
63°F
L:52° H:64°
RunScore
Conditions
Rain Freq
33%
2 of 6 yrs
Wind13mph
Dew49°F
Temperature History
Range of temperatures during race hours for each year.
Detailed History
| Year | Conditions | Low / High | Rain | Dew Point | Score |
|---|---|---|---|---|---|
2025 | | 57°/69° | - | 57° | |
2024 |  | 48°/74° | - | 44° | |
2023 | | 51°/57° | - | 41° | |
2022 |  | 57°/61° | Light | 51° | |
2021 | | 44°/59° | - | 43° | |
2019 |  | 58°/63° | Moderate | 58° |
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