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Grand Marias Surf Forecast
/ Lake Superior (10 breaks) / Michigan (11 breaks) /
Surf Forecasts:
Grand Marias surfForecast / Lake Superior / USA
12 Day Weather and Surf, issued 12 pm Saturday 29 Nov 2025 ESTForecast 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
7.1° C
(Which is 1.9°C warmer than normal for this time of year)Best Forecast Surf Conditions for Grand Marias this week:
The surf forecast for Grand Marias over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Dec 02) at 7AM. The primary swell is predicted to be 1.8m and 7s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Grand Marias in the next 12 days are 3.5m 9s and forecast to arrive on Wednesday (Dec 03) at 10PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.4m 7s period and expected on Friday (Dec 05) at 1AM.
| Wave Type | Time (EST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Tue 2nd Dec) | 6ft (1.8m) 7s |
| Best Surf | 7AM (Tue 2nd Dec) | 6ft (1.8m) 7s |
| Most Powerful | 10PM (Wed 3rd Dec) | 11ft (3.5m) 9s |
Table - best surf conditions forecast for Grand Marias over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast A dusting of new snow. Temperatures will be below freezing (max 0°C on Sat night, min -5°C on Mon night). Winds increasing (calm on Sat afternoon, strong winds from the N by Sun morning). | Days 3-6 Weather Summary A dusting of new snow. Temperatures will be below freezing (max 0°C on Wed morning, min -7°C on Thu night). Winds increasing (light winds from the SW on Tue afternoon, fresh winds from the WNW by Thu morning). | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 01 | Tuesday 02 | Wednesday 03 | Thursday 04 | Friday 05 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | — | — | |||||||||||||||||||
| Period(s) (?) | 5 | 4 | 4 | 5 | 7 | 8 | 6 | 7 | 7 | 7 | 6 | 5 | 7 | 8 | 9 | 8 | 8 | 8 | 7 | - | - |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 12 | 3 | 1 | 138 | 540 | 574 | 221 | 356 | 382 | 226 | 31 | 0 | 500 | 1006 | 1405 | 711 | 815 | 5 | 0 | 0 | 0 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | glass | cross | on | cross- on | cross- on | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross- on | cross- on | cross- on | cross- on | cross- off | off | off | cross- off |
High Tide / height (m) | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a |
Low Tide / height (m) | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a | n/a n/a |
Saturday 29 | Sunday 30 | Monday 01 | Tuesday 02 | Wednesday 03 | Thursday 04 | Friday 05 | |||||||||||||||
| Sunrise | 8:04 | - | - | 8:06 | - | - | 8:07 | - | - | 8:07 | - | - | 8:10 | - | - | 8:11 | - | - | 8:11 | - | - |
| Sunset | - | 4:59 | - | - | 4:59 | - | - | 4:58 | - | - | 4:58 | - | - | 4:57 | - | - | 4:57 | - | - | 4:57 | - |
 | |  |  | |  | | |  |  | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | -1 | -1 | 0 | -1 | -1 | -1 | -4 | -4 | -4 | -2 | -2 | -2 | 0 | -2 | -4 | -4 | -3 | -4 | -3 | -1 | -1 |
| Feels °C (?) | -5 | -4 | -7 | -11 | -11 | -10 | -12 | -12 | -11 | -8 | -8 | -9 | -9 | -12 | -14 | -14 | -12 | -11 | -9 | -6 | -8 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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FREE! Surf-Forecast.com widget for your website
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.
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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