Thanks for posting. The operating temperature of the Soundsport Free is 5 °F to 122 °F (-15 °C to 50 °C). If you feel that your SoundSport Free is not operating in those ranges, I would contact your local Bose support for assistance. Here is a link you can use. Click on your country, scroll down to "Contact Us".
Tony G - Community Support
I had the exact same problem, loved them until I went for a walk down here in Texas.... After 10 mins they cut out, I had to return them because of this issue and agree with you that something that is marketed as SPORT yet doesn't work in the sun sucks. Those headphones were by far the best ones I have owned ever! Really hope they fix this issue in the future.
Same issue here. In the UK in 25'c air temp and direct sunlight, they didn't last 10 minutes in the sun. Hardly the warmest place in the world. Had to switch to my old wired Beats earphones. Unacceptable.
Same issue here in Italy... after few minutes in direct sunlight left earbud disconnects.
Prior of this, just 2 or 3 times during a Gym session the left earbud has disconnected, but I could (hardly) accept this, being the gym crouded of bluetooth devices...
Obviously, firmware is up to date, earbuds correctly charged etc.
I'm seriuosly considering to return them back: But it's a pity because the sound is absolutely great.
Thanks for chiming in on this subject. If you feel like your headset is not working within the operating temperature we encourage you to contact your local Bose support for assistance using the link provided