Micheal Artindale said:Here is why I want to know about swimming in cold water:
I was bored one day, and I was curious how far it is through the Great lakes
from Thunder Bay to Kingston ON.
It is about 1300km. If I can maintain 1km/hr I could do it in 2 months.
The coldest lake is around 5C this time of year, yet the warmest one is over
20C.
I know many people have swam parts of the great lakes without a wetsuit. I
want to do that entire length with out one.
I have looked around, but am unable to find anything out.
Any help would be great.
The 5C lake would be Lake Superior. The last two times I have been
there, I went swimming in that lake and the temperature was fine,
about 20- 25C, I think. Both were in July.
I understand that if it has been sunny and the wind is towards shore
then the surface is warmer. If the wind is the other way, then the
surface water moves away and the cooler (i.e. "fekking freezing"😉
water from deeper comes up and the temp heads towards the 5C you
mentioned.
I heard this explanation from an expert-on-everything® who is usually
wrong, so you might want to search out the actual facts before
starting to do your traveling. There are sites that show the surface
temp of any part of the lakes on a day-to-day basis.
I know for a fact the temperature varies. It is sometimes tolerable
and sometimes not
I have heard that the temperature cycle in Lake Superior is two month
behind the temperature of the air. It's fresh water, but take this
factoid with a grain of salt.
The last time, I was doing mindless backstroke over gentle swells and
enjoying the sunset/almost full moon. Then I realized that I was far
enough from shore that a sudden weather change could cause the waves
to rise and the surface temperature to drop 8-10C (15F) faster than I
could swim to shore. I purposefully swam in closer then.
Other anecdotes indicate caution.
When I was twelve, I was used to swimming in cool, spring-fed lakes.
My brother and I would lie the thermometer out in the sum becaue my
mom would not let us swim unless it was 21C (70F) outside. Our own
adolescnet standards were more like "It's not freezing or anything, it
will be fun" I was somewhat unfamiliar with just how cold Superior
was, though
One hot summer afternoon, I dove into Lake Superior, head first.
Probably, before my feet actually cleared the surface, I realized I
made a mistake.
This was my first realization in life that I could actually do
something that would kill me.
It was like a punch in the chest. I was wiped out for the day, even
though the ladder to get out was only a foot or two from where I had
dived.
I worked on a lakes freighter for a while. We used to clean mops by
tying them up and thowing them in the water for a bit. One September
in Lake Superior, we ruined all our mops. The mops were bouncing on
the surface from wave to wave. The strands were freezing when they
hit the air and then breaking off when they hit the water.
They say that Superior is cold enough that somtimes bodies sink.
Here's something to consider with distance swimming - particularly if
you are doing it alone. Wetsuits float. It's pretty easy to drown
without one. but harder to drown with a wet suit.
Also, if you want to deal with colder water, swimming faster can
help. Less time in the water and more heat produced by your body. I
would shoot for 3 km an hour, if you want to really brave 200 or 300
km in Superior.
Good luck
Mick Young