Suffolk County Marathon

East Islip, NY, USA • October 18, 2026
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Race Day Weather

partly-cloudy-day
50°
63° high
Breezy
Dry

Cool start — fast day potential, warming through the race, moderate wind

A cool 50°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Temperatures rising to 63°F through the course will gradually increase perceived effort in the second half. Moderate winds around 12 mph may affect pacing on open sections of the course.

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Area Map

Course Map

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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
7
Conditions
Rain Freq
33%
2 of 6 yrs
Wind13mph
Dew49°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore

2025 Suffolk County Marathon

Partly cloudy throughout the day.

2025
partly-cloudy-day
57°/69°-
7

2024 Suffolk County Marathon

Clear conditions throughout the day.

2024
clear-day
48°/74°-
8

2023 Suffolk County Marathon

Partly cloudy throughout the day.

2023
partly-cloudy-day
51°/57°-
7

2022 Suffolk County Marathon

Cloudy skies throughout the day with rain.

2022
cloudy
57°/61°Light
8

2021 Suffolk County Marathon

Becoming cloudy in the afternoon.

2021
partly-cloudy-day
44°/59°-
8

2019 Suffolk County Marathon

Partly cloudy throughout the day with rain in the morning and afternoon.

2019
rain
58°/63°Moderate
5
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