Suffolk County Marathon
East Islip, NY, USA · October 18, 2026
Race Day Weather
58°at start
60° high
Windy
Dry
Cool and breezy, great conditions
Runners will face a steady temperature around 58°F throughout the race, with wind from the WSW at 16 mph, gusting to 24 mph. Humidity sits at 69%, with a dew point of 48°F. Given the cool temperatures and breezy conditions, runners should maintain a steady pace and stay hydrated.
Race day forecast available in 102 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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