Overview

Harsens Island / Lake St. Clair is a kitesurf spot located on Harsens Island, in the St. Clair River delta, at the entrance to Lake St. Clair, Michigan. This marshy island is part of the largest freshwater delta in the world. The spot offers access to Lake St. Clair from the east side, with a vast shallow water body. The area is renowned for fishing and water sports. Accessible by ferry or boat only.

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Spot forecast for Harsens Island / Lake St. Clair

Sunrise 07:49 · Sunset 18:40

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< 7 kn7–12 kn13–20 kn21–30 kn31–40 kn41+ kn Gusts Your minimum: 7 kn

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Harsens Island / Lake St. Clair: when to go?

Rideable days and hours computed for a minimum wind of 7 knots · log in to set your own (foil, twin-tip…)

Season · peak

333h

in May · 30 rideable days

Wind is uneven from month to month: the best months are May, January and March, at 29 rideable days and 9 °C. The low point is September, at 17.5 days.

Rideable days per month

Wind strength when it is rideable

7-12 knots · 73%13-20 knots · 25%21-30 knots · 1%

When the spot works, wind sits mostly between 7 and 12 knots — 73% of rideable hours. Big-kite territory. The coldest month is January, at -1 °C. The wettest month is July, with 112 mm.

Monthly averages: Harsens Island / Lake St. Clair

Monthly averages — Harsens Island / Lake St. Clair — averaged over 2 years of records — Weather data by Open-Meteo.com — How it is calculated
Month	Rideable days	Usable wind	Temperature	Rain
January	29.0	299 h	-1 °C	60 mm
February	22.0	221 h	3 °C	19 mm
March	29.0	332 h	8 °C	40 mm
April	27.5	352 h	15 °C	35 mm
May	30.0	333 h	21 °C	53 mm
June	29.0	338 h	26 °C	77 mm
July	25.5	245 h	28 °C	112 mm
August	24.5	266 h	26 °C	30 mm
September	17.5	161 h	24 °C	35 mm
October	25.5	267 h	18 °C	32 mm
November	27.0	263 h	9 °C	39 mm
December	26.5	266 h	1 °C	63 mm

Photo gallery of Harsens Island / Lake St. Clair

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Technical details of Harsens Island / Lake St. Clair spot

The spot works with winds from N, NNE, NE, ENE, E, ESE, SE, SSE, S, SSW, SW, WSW, W, WNW, NW, NNW.

Rideable Not rideable

Spot opening date · Required level

Spot opening date: Open all year round
Required level: Intermediate

On the water

Lake St. Clair water body, very shallow (average depth 3 meters). Short, choppy waves in sustained winds. Water warms quickly in summer, allowing riding in a shorty from June to September. Sandy and muddy bottom. Vast riding area offering plenty of space despite shallow depth. Current from the St. Clair River delta.

Hazards

Very shallow lake — risk of hitting bottom during falls. St. Clair River delta currents in this area. Heavy boat traffic in summer. Commercial shipping channel — never cross it. Marshy areas and shoals around the island. Violent thunderstorms possible with lightning risk. Island accessible only by ferry — plan access accordingly.

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Selfridge Air National Guard Base15.6 kmsource noaa

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Additional stations

GW3736 HARRISON TWP13 km

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source noaa
K8MUD18.1 km

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source CWOP / APRS-IS

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Webcams near Harsens Island / Lake St. Clair

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Nearby spots

All spots: Michigan

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Harsens Island / Lake St. Clair kitesurf and wingfoil spot