<div class="spoiler_container"><div class="spoiler_header" onclick="hideSecond (this);" role="button">Research</div><div class="spoiler_body">http://www.boston.world-guides.com/weather.html<br/><br/>October: Max 17°C / 63°F, Min 8°C / 46°F<br/><br/>http://www.ussartf.org/cold_water_survival.htm (http://www.ussartf.org/cold_water_survival.htm)<br/><br/>Cold Water<br/><br/>What is it?  It is difficult even for an expert to define.  It is estimated to be around and under the temperature of 70 degrees.  However, this will vary in each case due to the specific circumstances and physical condition of the person involved.</div></div><br/>Looks like swimming would be pretty ill-advised, at least for extended periods, and that's if we're having a warm period.