Surf Forecasts:
Ontonagon surf forecast from 3 Sep 2026:
- Best quality surf: Monday 7 Sep, 11AM (local time) - 3.5ft (1.1m), 5s period, ENE swell with offshore winds.
- Most powerful swell: Monday 7 Sep, 8PM (local time) - 4.5ft (1.3m), 6s period, E swell with 108 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 11AM (local time) - 3.5ft (1.1m), 5s period with ENE swell.
Best Forecast Surf Conditions for Ontonagon this week:
The surf forecast for Ontonagon over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 07) at 11AM. The primary swell is predicted to be 1.1m and 5s period with a secondary swell of 0.1m and 6s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Ontonagon in the next 16 days are 1.3m 6s and forecast to arrive on Monday (Sep 07) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Monday (Sep 07) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Mon 7th Sep) | 3.5ft (1.1m) 5s |
| Best Surf | 11AM (Mon 7th Sep) | 3.5ft (1.1m) 5s |
| Most Powerful | 8PM (Mon 7th Sep) | 4.5ft (1.3m) 6s |
Table - best surf conditions forecast for Ontonagon over the next 16 days.
Short Range ForecastLight rain (total 5mm), mostly falling on Thu night. Warm (max 26°C on Fri afternoon, min 18°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 16mm), heaviest on Mon night. Warm (max 26°C on Sun afternoon, min 17°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | — | — | — | E 3 | E 4 | ENE 4 | E 4 | E 3 | E 3 | ESE 4 | SSE 3 | — | ENE 3 | ENE 5 | ENE 6 | ESE 5 | E 7 | E 7 | — |
Wave Graph  | |||||||||||||||||||
 kJ | 0 | 0 | 0 | 1 | 6 | 17 | 7 | 2 | 2 | 0 | 0 | 0 | 3 | 64 | 97 | 0 | 32 | 23 | 0 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | cross-on | cross-off | cross-off | cross-on | cross | cross | cross-on | cross-off | off | cross-on | off | off | off | off | off | glassy | cross-off |
High Tide | |||||||||||||||||||
Low Tide | |||||||||||||||||||
 | | |  |  | | |  | |  | | |  | |  | |  | | | |
 | — | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — | 7:22 | — | — | 7:24 | — | — |
 | 8:35 | — | 8:32 | — | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — | — | 8:24 | — | — | 8:22 | — |
mm | — | — | — | 3 | — | — | 2 | — | — | — | — | — | — | — | 2 | 13 | 1 | — | — |
Temp °C | 22 | 22 | 23 | 21 | 21 | 26 | 22 | 21 | 23 | 21 | 23 | 26 | 22 | 23 | 25 | 19 | 23 | 25 | 23 |
Feels °C | 23 | 21 | 21 | 18 | 22 | 25 | 20 | 21 | 23 | 20 | 22 | 26 | 23 | 21 | 24 | 18 | 24 | 27 | 25 |
Swell 1 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | N 6 | N 6 | — | E 7 | E 7 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | 32 | 23 | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | E 3 | E 4 | ENE 4 | E 4 | E 3 | E 3 | ESE 4 | SSE 3 | — | ENE 3 | ENE 5 | ENE 6 | ESE 5 | SSE 5 | S 5 | — |
| kJ | — | — | — | 1 | 6 | 17 | 7 | 2 | 2 | 3 | 1 | — | 3 | 64 | 97 | 97 | 93 | 62 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1428 | 1428 | 1428 | 1462 | 1431 | 1522 | 1501 | 1702 | 1940 | 1431 | 1535 | 1425 | 1434 | 0 | 0 | 1428 | 1431 | 1522 | 1558 |
Best forecast wave conditions in Lake Superior | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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 Ontonagon 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 Ontonagon Surf forecast
The above surf forecast table for Ontonagon provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ontonagon can be found by selecting the local surf guide option on the grey menu. Our Ontonagon 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 (Ontonagon) 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 Ontonagon 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.
Ontonagon is 151 km (94 miles) from the city of 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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