Suffolk County Marathon
East Islip, NY, USA · October 18, 2026
Race Day Weather
58°at start
60° high
Windy
Dry
Comfortable temps, moderate wind
Mild 58°F temps at gun time mean comfortable early miles without overheating risk. Moderate winds around 18mph may affect pacing on open sections of the course. Moderate humidity at 68% is worth noting for effort level, especially in later miles.
Race day forecast available in 113 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 58°F with a 11% 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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