Marathon surfForecast / Lake Superior / Canada

information circle12 Day Weather and Surf, issued 7 am Thursday 10 Jul 2025 EDT
Forecast update in 31 min 41 s Forecast update imminent
Marathon surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Marathon sea temperature is
43.7°F
(Which is 2.9°F warmer than normal for this time of year)
Updates in 31 min 41 s Forecast update imminent
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (ft) & direction (?)
Period(s) (?)------------------------------------
Wave
Graph
(?)Metric surfscale
Energy (?)000000000000000000000000000000000000
Wind
(mph)
5
S
5
SSW
5
SSE
10
S
5
SSE
5
SSE
10
S
5
SE
5
SW
5
SSW
5
S
5
S
10
S
5
S
5
NNE
5
SSE
5
NE
15
NNE
15
NNE
5
NNE
5
NNE
5
SSW
5
WSW
5
SE
5
S
5
S
5
SE
5
SSW
5
S
10
SSE
20
SSE
25
SSE
25
SSE
5
S
5
S
5
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on
onglassoncross-
on
cross-
on
cross-
on
crossglassononcross-
on
cross-
on
cross-
on
offcross-
on
glassoffoffoffoffoncross-
on
cross-
on
ononglassononcross-
on
cross-
on
cross-
on
cross-
on
oncross-
on
cross-
on
High Tide
/ height (ft)
n/a
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n/a
n/a
Low Tide
/ height (ft)
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
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Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Sunrise5:54--5:54--5:54--5:56--5:56--5:58--5:58--6:01--6:01--6:03--6:03--6:05--
Sunset-9:47--9:46--9:46--9:45--9:45--9:44--9:43--9:43--9:42--9:40--9:39--9:37-
clearpart cloudrain showersrain showerspart cloudpart cloudlight rainlight raincloudcloudpart cloudpart cloudlight rainpart cloudrain showerslight rainlight rainheavy rainpart cloudpart cloudclearclearpart cloudpart cloudclearpart cloudpart cloudclearpart cloudpart cloudcloudheavy rainmod rainlight rainpart cloudpart cloud
Rain (in)
--0.00.0--0.10.0----0.0-0.00.00.10.5-------------0.60.40.1--
Temp. °F616157555761555755595752525561615754576861555552555752576159595961575754
Feels °F (?)595755525563525755575448465463635746486355525048525248545959525252555550

Short Range Forecast: Light rain (total 0.2in), mostly falling on Sat morning. Very mild (max 61°F on Thu morning, min 52°F on Thu night). Wind will be generally light.

Days 3-6 Weather Summary Moderate rain (total 0.7in), heaviest on Tue night. Very mild (max 61°F on Mon night, min 46°F on Sun night). Wind will be generally light.

Days 6-9 Weather Summary Mostly dry. Warm (max 68°F on Wed afternoon, min 46°F on Thu night). Wind will be generally light.

Long Range Forecast: Heavy rain (total 1.1in), heaviest during Sun afternoon. Very mild (max 61°F on Sat afternoon, min 50°F on Mon night). Winds increasing (calm on Sat night, strong winds from the SSE by Sun afternoon).

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  • Map Icons:
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  • Live Wave Height (ft)
  • Live Wind Speed (mph)
  • Surf Rating (10 Max)
  • Ocean Swells (ft)
  • Wind Speed (mph)
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Information about the Marathon Surf forecast

The above surf forecast table for Marathon provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Marathon can be found by selecting the local surf guide option on the grey menu. Our Marathon surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Marathon) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Marathon may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Are you planning a holiday in Lake Superior - Canada? If you are looking for accommodation near Marathon, camping, hotels and holiday cottages in Lake Superior - Canada, consider staying in Michipicoten Harbour which is 149 km (93 miles) away.

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