Suffolk County Marathon
East Islip, NY, USA • October 18, 2026
Race Day Weather
50°
63° high
Breezy
Dry
Cool and calm, optimal racing
Runners will face a starting temperature of 52°F, rising to 63°F by the finish. Winds will be from the SW at 12 mph, with gusts up to 25 mph, providing a mild challenge. With humidity at 61% and no rain expected, runners can maintain their pace comfortably without hydration concerns.
Race day forecast available in 185 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.
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° |
More NY Races
Brooklyn Half Marathon
2026-04-26 · Brooklyn, NY, USA
RBC Brooklyn Half Marathon
2026-05-16 · Brooklyn, NY, USA
Lake Placid Marathon
2026-06-14 · Lake Placid, NY, USA
XCelsior Marathon
2026-06-07 · Valley Cottage, NY, USA
Boilermaker 15K
2026-07-12 · Utica, NY, USA
Sri Chinmoy Marathon
2026-08-24 · Congers, NY, USA