The wave sensor was removed for the winter season.

The camera has been moved to a different location with the left camera oriented north and the right camera northeast.


      This site is intended to provide real-time wave information at the Mainland Sea Caves, which is part of the beautiful Apostle Islands National Lakeshore. We only intend to provide real-time information, so please check the weather forecast before going on the water! If you are new to kayaking, knowledge of rescue and safety procedures can be learned from local outfitters.

Latest Wave Info


9:30 AM

Wave Model height 0.9 ft

The following rating system was devised in conjunction with kayak outfitters that routinely guide trips to the sea caves. The recommended skill level is color coded based on wave height.

< 1 ft Novice
1-2 ft Intermediate
> 2 ft Advanced

What is Reported?

Past Pictures




Height (ft.)

Max Wave


Wind Speed


Wind Gust





Temp (°F)


9:30 AM 0.9 Model N/A N/A N/A 45.2

L     R

9:00 AM 0.8 Model 8.9 11.2 N 45.2

L     R

8:30 AM 0.8 Model N/A N/A N/A 45.2

L     R

8:00 AM 0.8 Model 11.2 13.4 N 45.2

L     R

7:30 AM 0.8 Model N/A N/A N/A 45.2

L     R

7:00 AM 0.7 Model 11.2 11.2 NE 45.2

L     R

6:30 AM 0.7 Model N/A N/A N/A 45.2

L     R

6:00 AM 0.7 Model 8.9 8.9 NE 45.2

L     R

5:30 AM 0.7 Model N/A N/A N/A 45.2


5:00 AM 0.7 Model 4.5 6.7 NE 45.2


4:30 AM 0.7 Model N/A N/A N/A 45.2


4:00 AM 0.7 Model 6.7 8.9 NE 45.2


3:30 AM 0.8 Model N/A N/A N/A 45.2


Model    - Indicates reported wave is a model result, not a measured wave.

++ - Indicates a freak wave.

** - Waves traveling from the East or Northeast may be underestimated by the sensor due to the sensor location. Use caution.

N/A stands for Not Available. Wind Data from NOAA buoy 45006 will be used until Devils Island is back online.