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Ontonagon Surf Forecast
/ Lake Superior (10 breaks) / Michigan (11 breaks) /
Surf Forecasts:
Ontonagon surfForecast / Lake Superior / USA
48hr Weather and Surf, issued 1 am Tuesday 12 May 2026 EDTForecast update in hr min s Forecast update imminent
Ontonagon surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Ontonagon sea temperature is
2.9° C
(Which is normal for this time of year)| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 May) | - | - |
| Afternoon (12 May) | - | - |
| Evening (12 May) | 2.5ft (0.7m) | 5s |
Table - waves today at Ontonagon. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 17mm), heaviest on Thu night. Very mild (max 16°C on Thu night, min 3°C on Tue night). Winds decreasing (fresh winds from the SSE on Tue morning, calm by Wed night). | ||||||||||||||||||||||||
Tuesday 12 | Wednesday 13 | Thursday 14 | ||||||||||||||||||||||
2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
SE 4 | SE 5 | SE 5 | SE 5 | SE 5 | ESE 5 | ESE 5 | N 4 | E 7 | E 7 | E 7 | E 7 | E 6 | E 6 | WNW 3 | NW 3 | — | — | — | — | — | E 2 | ESE 4 | SE 5 | |
0 | 0 | 0 | 0 | 0 | 59 | 32 | 35 | 24 | 51 | 53 | 33 | 12 | 6 | 5 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | off | off | off | off | cross | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross | glassy | cross | glassy | cross-off | cross | cross-on | cross | off | off | |
High Tide | ||||||||||||||||||||||||
Low Tide | ||||||||||||||||||||||||
 | |  | |  | | | | | | | |  | | |  |  | | | | | | | | |
 | — | 6:26 | — | — | — | — | — | — | — | 6:24 | — | — | — | — | — | — | — | 6:22 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:21 | — | — | — | — | — | — | — | 9:22 | — | — | — | — | — | — | — | 9:22 | — |
— | — | 3 | 2 | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 5 | 8 | 7 | 8 | 12 | 11 | 5 | 3 | 3 | 4 | 4 | 5 | 7 | 7 | 8 | 7 | 4 | 3 | 3 | 8 | 10 | 13 | 16 | 13 |
-1 | 2 | -1 | 2 | 9 | 9 | -2 | -5 | -4 | -2 | -2 | 0 | 3 | 3 | 5 | 5 | 1 | 0 | -1 | 5 | 6 | 10 | 11 | 8 | |
Swell 1 Height (m) Direction Period (s) | — | — | — | — | — | ESE 5 | ESE 5 | E 6 | E 7 | E 7 | E 7 | E 7 | E 6 | E 6 | E 5 | — | — | — | — | — | — | — | — | — |
 kJ | — | — | — | — | — | 59 | 32 | 28 | 24 | 51 | 53 | 33 | 12 | 6 | 2 | — | — | — | — | — | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | NE 5 | NE 5 | NE 5 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 6 | 7 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 4 | SE 5 | SE 5 | SE 5 | SE 5 | — | N 4 | N 4 | N 4 | NNW 4 | NNW 4 | NNW 4 | NW 3 | NW 3 | WNW 3 | NW 3 | — | — | — | — | — | E 2 | ESE 4 | SE 5 |
| kJ | 28 | 37 | 49 | 64 | 87 | — | 9 | 35 | 21 | 13 | 9 | 5 | 1 | 3 | 5 | 2 | — | — | — | — | — | 1 | 15 | 73 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1425 | 1425 | 1425 | 1423 | 1503 | 1518 | 1518 | 1518 | 1518 | 1518 | 1519 | 1522 | 1733 | 2313 | 1733 | 1461 | 1500 | 1423 | 1431 | 1431 | 1431 | 1423 | 1535 | 1462 |
Best forecast wave conditions in Lake Superior | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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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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