Overview

Mission Island Marsh is in Thunder Bay, on the northwest shore of Lake Superior. Thunder Bay is northwestern Ontario's largest city, at the head of Thunder Bay. The spot offers a protected area in the bay with views of the famous Sleeping Giant rock formation. Calmer conditions than the open lake thanks to the bay.

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Spot forecast for Mission Island Marsh

Sunrise 14:24 · Sunset 00:58

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

Forecasts provided by Open-Meteo

Mission Island Marsh: 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

152h

in May · 23 rideable days

The season runs from March to June, peaking in May: 21 rideable days a month and 152 hours of usable wind, at 12 °C. The low point is February, at 12.5 days.

Rideable days per month

Wind strength when it is rideable

7-12 knots · 75%13-20 knots · 24%21-30 knots · 1%

When the spot works, wind sits mostly between 7 and 12 knots — 75% of rideable hours. Big-kite territory. The coldest month is January, at -7 °C. The wettest month is September, with 131 mm.

Monthly averages: Mission Island Marsh

Monthly averages — Mission Island Marsh — averaged over 2 years of records — Weather data by Open-Meteo.com — How it is calculated
Month	Rideable days	Usable wind	Temperature	Rain
January	15.0	96 h	-7 °C	21 mm
February	12.5	78 h	-4 °C	17 mm
March	19.0	149 h	2 °C	45 mm
April	21.5	157 h	7 °C	69 mm
May	23.0	152 h	16 °C	42 mm
June	19.0	107 h	21 °C	114 mm
July	18.0	99 h	26 °C	115 mm
August	20.5	127 h	24 °C	49 mm
September	15.5	97 h	21 °C	131 mm
October	22.5	138 h	14 °C	18 mm
November	18.0	105 h	4 °C	30 mm
December	15.5	91 h	-6 °C	47 mm

Photo gallery of Mission Island Marsh

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Technical details of Mission Island Marsh spot

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

Rideable Not rideable

Spot opening date · Required level

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

On the water

Lake Superior fresh water. Protected area in the bay — flat to choppy. Sand and mud bottom. Cold water (8-16°C even in summer). Limited fetch in the bay but open to the south. Lake Superior warms slowly.

Hazards

Cold Lake Superior water (full wetsuit required). Marshy area — watch for shallows and aquatic vegetation. Port traffic (Thunder Bay is a major grain port — cargo ships and bulk carriers). Violent storms possible. Currents in the bay.

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Live

THUNDER BAY CS8.5 kmsource Environment Canada

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Additional stations

WELCOME ISLAND (AUT)6.9 km

Readings reserved for Premium members
source Environment Canada
Thunder Bay8.1 km

Readings reserved for Premium members
source Environment Canada

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Webcams near Mission Island Marsh

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Nearby spots

All spots: Ontario

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Mission Island Marsh kitesurf and wingfoil spot