Spring has arrived, and with it comes the return of open water fishing and early-season paddling. But while the air may feel warm, Maine’s waters tell a very different story, according to Maine Department of Inland Fisheries and Wildlife, in a news release.

MDIFW provides the following information:

In April, average inland water temperatures hover around 40°F—about the same as the ocean—which is ideal for brook trout (50–65°F), but dangerously cold for people. 

Cold water is unforgiving. It pulls heat from your body four times faster than air, and the effects can set in quickly: 

• Below 70°F: Cold water becomes increasingly dangerous 
• Below 60°F: Loss of strength and coordination can happen in under 10 minutes 
• Below 50°F: Cold water shock can occur immediately 
• Around 40°F: Survival time may be measured in minutes 

Maine waters typically don’t reach 50°F until early May and won’t feel truly warm until summer. So, don’t let a sunny day fool you: cold water doesn’t care how experienced you are. Understanding the risks and preparing for them can make all the difference: 

• Dress for the water, not the air: Wetsuits or dry suits are recommended below 70°F  
• Always wear a life jacket: It could save your life  
• Plan for immersion: Assume you could end up in the water 
• File a float plan: Let someone know where you’re going and when you’ll return  

Learn more about cold water safety from U.S. National Weather Service (NWS).