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Grand Marias surfForecast / Lake Superior / USA

information circle12 Day Weather and Surf, issued 7 am Thursday 03 Jul 2025 EDT
Forecast update in hr  min  s Forecast update imminent
Grand Marias surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Grand Marias sea temperature is
8.8° C
 (Which is normal for this time of year)

Best Forecast Surf Conditions for Grand Marias this week:

The most powerful waves expected at Grand Marias in the next 12 days are 0.9m 4s and forecast to arrive on Sunday (Jul 06) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Saturday (Jul 05) at 2AM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8AM (Sun 6th Jul)3ft (0.9m) 4s

Table - best surf conditions forecast for Grand Marias over the next 12 days.

Hourly12 Days
Lake Superior Surf
Print Surf Table
Updates in  hr  min  s Forecast update imminent 
Thursday
03
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
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
See all maps
Wave Height (m) & direction (?)———
0.5
SE
0.7
SSE
1.2
S
0.9
SSW
0.6
SSW
0.7
WNW
0.8
NNW
0.7
NNW
0.5
N
0.3
N
0.2
NNW
—
0.2
SSE
0.3
SE
0.4
SE
——————————————————
Period(s) (?)---34554455433-233------------------
Wave
Graph
(?)Metric surfscale
Energy (?)000000001228239210000000000000000000000
Wind
(km/h)
5
NE
5
N
10
SSE
20
S
25
S
20
SSW
25
SSW
20
SW
10
NNW
25
NNE
20
NE
5
NW
5
NE
10
ENE
5
ESE
5
ENE
10
NE
5
SW
5
N
10
N
0
SSW
10
ENE
15
ENE
15
SE
15
SE
10
ESE
10
ENE
30
E
25
ESE
10
WSW
20
W
5
WNW
15
WSW
5
WNW
15
NE
15
ESE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
glassonoffoffoffoffcross-
off		cross-
off		cross-
on		cross-
on		cross-
on		glassglasscross-
on		cross-
off		cross-
on		cross-
on		glassononglasscrosscross-
on		cross-
off		cross-
off		cross-
off		cross-
on		crosscross-
off		cross-
off		crossglasscross-
off		crosscross-
on		cross-
off
High Tide
/ height (m)
n/a
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Low Tide
/ height (m)
n/a
n/a
n/a
n/a
n/a
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Thursday
03
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Sunrise5:54--5:56--5:56--5:56--5:58--5:58--6:00--6:01--6:01--6:01--6:03--6:03--
Sunset-9:40--9:39--9:39--9:39--9:38--9:38--9:37--9:37--9:37--9:36--9:36--9:35-
clearclearclearclearpart cloudrain showerspart cloudrain showersheavy rainlight rainrain showerspart cloudpart cloudpart cloudpart cloudpart cloudpart cloudpart cloudcloudpart cloudpart cloudpart cloudpart cloudpart cloudpart cloudpart cloudcloudlight rainheavy rainlight raincloudpart cloudclearclearpart cloudpart cloud
Rain (mm)
-----2-11232----------------2175------
Temp. °C141616212320232620131412131518171817141515151818222223171617131918161716
Feels °C (?)13151517191922242091110121317171717141415141617212124151115102017161613

Short Range Forecast: Moderate rain (total 15mm), heaviest on Sat night. Warm (max 26°C on Sat afternoon, min 11°C on Thu morning). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 5mm), mostly falling on Sun morning. Very mild (max 18°C on Mon night, min 9°C on Sun night). Wind will be generally light.

Days 6-9 Weather Summary Mostly dry. Warm (max 23°C on Fri night, min 12°C on Wed morning). Wind will be generally light.

Long Range Forecast: Heavy rain (total 40mm), heaviest during Tue morning. Very mild (max 19°C on Sun afternoon, min 12°C on Sat night). Winds increasing (calm on Sun afternoon, fresh winds from the NNE by Tue morning).

  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Grand Marias surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Grand Marias at:
surf-forecast.com

Information about the Grand Marias Surf forecast

The above surf forecast table for Grand Marias provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Grand Marias can be found by selecting the local surf guide option on the grey menu. Our Grand Marias 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 (Grand Marias) 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 Grand Marias 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.

Grand Marias is 100 km (62 miles) from Marquette. If you plan a vacation in Lake Superior, look for hotels and other accommodation in Marquette. Marquette has rooms for a wide range of budgets as well as car hire and transport links.

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