Harpoon 5 Miler

Boston, MA, USA · May 15, 2027

59°·61° high·Breezy·Dry

Weather

Race Day Weather

59°at start

63° high

Breezy

Dry

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Mild temps, light wind

Runners will face temperatures starting at 59°F and rising to 61°F by the finish. With a max wind of 9 mph from the SSW, conditions will be light overall. Given the humidity at 67%, pacing should be adjusted conservatively. Pre-race feels-like temperatures drop to 55°F, suggesting a light layer may be beneficial.

Race day forecast available in 188 days

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Distance: 5.0mi

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Race Info

The Harpoon 5-Miler is a five-mile road race in Boston's Seaport District that starts and finishes at Harpoon Brewery on Northern Avenue. The out-and-back course is flat and fast, with about 32 feet of elevation gain, and is run on the Saturday or Sunday in mid-May. The race benefits ALS research through The Angel Fund for ALS Research and the Peter Frates Family Foundation, and has raised more than $3.1 million. Runners finish with a post-race party at the brewery.

Website

Course Map

FAQ

When is the 2027 Harpoon 5 Miler?

The 2027 Harpoon 5 Miler will be held on Saturday May 15, 2027.

What is the time limit for the Harpoon 5 Miler?

The time limit for the Harpoon 5 Miler is 1 hours.

What will the weather be like for the 2027 Harpoon 5 Miler?

The forecast calls for a high of 62°F and a low of 51°F with a 13% chance of rain.

What is the elevation profile of the Harpoon 5 Miler?

The Harpoon 5 Miler has 32ft of total elevation gain.

Historical Weather

Based on 23 years of data

Avg Temp

64°F

L:63° H:64°

RunScore

Conditions

Rain Freq

2 of 23 yrs

Wind10mph

Dew53°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Harpoon 5 Miler Partly cloudy throughout the day. 2026	65°/69°	-	50°
2025 Harpoon 5 Miler Partly cloudy throughout the day. 2025	66°/68°	-	49°
2024 Harpoon 5 Miler Cloudy skies throughout the day with a chance of rain throughout the day. 2024	54°/54°	Light	53°
2023 Harpoon 5 Miler Clearing in the afternoon with early morning rain. 2023	63°/65°	-	48°
2022 Harpoon 5 Miler Partly cloudy throughout the day with afternoon rain. 2022	67°/69°	-	59°
2019 Harpoon 5 Miler Partly cloudy throughout the day with afternoon rain. 2019	63°/64°	-	47°
2018 Harpoon 5 Miler Partly cloudy throughout the day with rain. 2018	71°/73°	-	66°
2017 Harpoon 5 Miler Partly cloudy throughout the day. 2017	57°/58°	-	43°
2016 Harpoon 5 Miler Partly cloudy throughout the day. 2016	57°/58°	-	53°
2015 Harpoon 5 Miler Partly cloudy throughout the day. 2015	62°/63°	-	57°
2014 Harpoon 5 Miler Partly cloudy throughout the day. 2014	62°/62°	-	45°
2013 Harpoon 5 Miler Partly cloudy throughout the day with late afternoon rain. 2013	59°/61°	-	51°
2012 Harpoon 5 Miler Partly cloudy throughout the day. 2012	65°/68°	-	48°
2011 Harpoon 5 Miler Cloudy skies throughout the day. 2011	51°/52°	-	46°
2010 Harpoon 5 Miler Partly cloudy throughout the day with rain clearing later. 2010	72°/74°	-	67°
2009 Harpoon 5 Miler Partly cloudy throughout the day. 2009	58°/59°	-	53°
2008 Harpoon 5 Miler Partly cloudy throughout the day with late afternoon rain. 2008	69°/71°	-	61°
2007 Harpoon 5 Miler Cloudy skies throughout the day with afternoon rain. 2007	59°/60°	-	55°
2006 Harpoon 5 Miler Cloudy skies throughout the day with a chance of rain throughout the day. 2006	56°/56°	Moderate	54°
2005 Harpoon 5 Miler Clearing in the afternoon. 2005	70°/71°	-	58°
2004 Harpoon 5 Miler Partly cloudy throughout the day. 2004	61°/62°	-	45°
2003 Harpoon 5 Miler Partly cloudy throughout the day with late afternoon rain. 2003	65°/66°	-	53°
2002 Harpoon 5 Miler Partly cloudy throughout the day with morning rain. 2002	73°/75°	-	50°