Private online access: You can access your weather data anytime, anywhere from any browser. Go to https://tempestwx.com/ and login with the same username & password that you created for the mobile app.
Shared online web access: To enable others to see your weather data, make sure your station is sharing data publicly. Check the settings in the mobile app:
Go to Settings > Stations > choose your station > Public Data > Share Publicly (toggle on).
Then simply log into https://tempestwx.com/ and click on the share button in the bottom left corner to get your station URL. You can also find the share button in the mobile app.
Shared mobile app access: Each station can only be linked to one user account. If you want to share your station data with someone else in the app, they will need to sign into your account. There are no sign in restrictions with the app, so you and multiple family members can all have the app open at the same time.