Surf-Forecast | Ontonagon Surf Guide

Lat Long: 46.89° N 89.30° W

Issued: 1 am 03 Aug 2026 (local time)

Forecast update in hr min

Today's Ontonagon sea temperature is

17.9° C

Ontonagon surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Ontonagon Surf Guide

Ontonagon in Lake Superior is an exposed beach break that has unreliable waves Offshore winds blow from the south. Short period wind swells are the rule and the best wave direction is from the north northeast. Waves at the beach break both left and right. It very rarely gets crowded here. Watch out for rocks.

Ontonagon Spot Info

Type:	Rating:	Reliability:	Todays Sea Temp*:
Beach	3	inconsistent	17.9°C*ocean temperature recorded from satellite

Surfing Ontonagon:

The best conditions reported for surf at Ontonagon occur when a North-northeast swell combines with an offshore wind direction from the South.

Hourly Forecast

16 Day Forecast

Explore Ontonagon Location Map

Interactive Ontonagon surf break location map. View information about nearby surf breaks, their wave consistency and rating compared to other spots in the region. Current swell conditions from local buoys are shown along with live wind speed and direction from nearby weather stations. Click icons on the map for more detail. The closest passenger airport to Ontonagon is Sawyer International (Marquette) Airport (MQT) in USA, which is 139 km (86 miles) away (directly). The second nearest airport to Ontonagon is Thunder Bay Airport (YQT) in Canada, 165 km (102 miles) away.

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Please note that some surf spot locations are approximate to protect their exact location while others are not shown at close zoom level.

Ontonagon Surf Forecasts:

Hourly Forecast

16 Day Forecast

Todays Surf Summary
Monday, 3 August 2026, 08:15 Local Time

m, °C	Monday 03
ft, °F	5AM	8AM	11AM	2PM
Wave (m)
Period (s)	-	-	-	-
Wind (km/h)
Wind State	off	off	cross- off	glass

Ontonagon Sea Temperature

Sunny with pleasantly warm air temperatures (feeling like 23.0 °C once we account for wind), yet at 17.9 °C the sea remains several degrees colder than the air at Ontonagon. The majority of surfers will need a spring wetsuit though a summer suit or even a shorty may suffice for a short session.

Today, many surfers would wear a spring wetsuit.

Current Temp*: 17.9°C*ocean temperature recorded from satellite