Anyone know of a simple devise that can tell me the water temp from my boat?  I would figure that one that connects to the trolling motor would be easiest but I am open to suggestions.  I don't want anything fancy, just something thats user friendly and tells the water temp!

What about one of those digital thermometers that you can get at a cooking store? They have a probe on a long cable, and some have a magnet on the back...don't know if they read that low or not, but they're pretty cheap....

MinnKota makes a small digital that runs on a AAA battery and has a cord with a small sensor that can be mounted anywhere you like.  I saw them at Wal-Mart for $10.

MinnKota makes a small digital that runs on a AAA battery and has a cord with a small sensor that can be mounted anywhere you like. I saw them at Wal-Mart for $10.

Cephkiller, I'd advise against that one! I had one. Worked great for a while but the wires are so light, they end up breaking.

On my boat, I use the temp gauge on my Fishfinder. When I'm fishing from shore, I use a pool thermometer. Hope this helps!

The Minn Kota one sounds like the type of thing I'm looking for but I do want to make sure it holds up.  I guess for $10 I can just give it a try.  Unfortunatly I've got a pretty old depth finder that doesn't have a water temp feature

The Minn Kota one sounds like the type of thing I'm looking for but I do want to make sure it holds up.  I guess for $10 I can just give it a try.  Unfortunatly I've got a pretty old depth finder that doesn't have a water temp feature

I've got one of those. I believe they're actually closer to $20. I don't use mine anymore, but it still works. (never bothered to take the little watch battery out of it)  I had another one previous which I managed to mount to my dash.  I never had a problem with the wires though.

pool therm.....

I've heard that as a general rule of thumb, the water temperature is usually within a degree or two of the average daily high and low.

I've never actually tested that theory, but it does seem about right.