Various free local weather forecasts are available on the internet. Here are a couple to choose from:
The Met Office -
www.metoffice.gov.uk/public/weather/forecast/totnes - Various views
available: 5-day, Map, Timeline, Temp rage, Text forecast;
also includes Sunrise & Sunset Times
XC Weather - www.xcweather.co.uk/forecast/harberton - A simple graphical 7-day look ahead.
Metcheck - www.metcheck.com/UK/today.asp?zipcode=totnes - Another simple graphical website, 48 hours/1 week/2 weeks, and beyond
Totnes tide times from UK Hydrographic Office (EasyTide, 7-day prediction)