Find the most current and reliable 14 day weather forecasts, storm alerts, reports and information for Sammamish, WA, US with The Weather Network. Clear. Feels Like: 75 °F Forecast: 70 / 56 °F Wind: No wind Upcoming 5 hours See more hour-by-hour weather Forecast for the next 48 hours 14 day forecast, day-by-day Hour-by-hour forecast for next week Forecast for the next 2 weeks Detailed forecast for 14 days Need some help?.