Suffolk County Marathon
East Islip, NY, USA • October 18, 2026
Race Day Weather
50°
63° high
Breezy
Dry
Cool conditions, manageable wind
Runners will face a temperature rise from 52°F to 63°F during the race, with a steady wind from the SW at 12 mph and gusts up to 25 mph. The humidity is moderate at 61%, with a dew point of 45°F. With these conditions, runners can maintain their pace comfortably without needing significant adjustments.
Race day forecast available in 205 days
Pre-raceRace windowPost-race
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.
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° |