January 21, 2021: Portsmouth weather forecast for now and the week ahead â Clear for the hour. North wind 10 to 14 mph. Chance of precipitation is 40%. Partly sunny, with a high near 34. Portsmouth, RI Weather History star_ratehome. Get the Portsmouth, RI local hourly forecast including temperature, RealFeel, and chance of precipitation. No precipitation throughout the week. Share: Get the Long Range Weather for Your Location. Nearby Weather Stations. No PWS. NOAA National Weather Service National Weather Service. Know what's coming with AccuWeather's extended daily forecasts for Portsmouth, RI. Weather reports for over 50,000 U.S. locations includes current conditions, three-day forecasts, seven-day forecasts, hourly forecast tracking, weather history, weather radar and warnings. Location: Portsmouth, RI. Portsmouth, RI weekend weather forecast, high temperature, low temperature, precipitation, weather map from The Weather Channel and Weather.com Check out our current live radar and weather forecasts for Portsmouth, Rhode Island to help plan your day 2021 Long Range Weather Forecast for Portsmouth, RI . Find the most current and reliable 14 day weather forecasts, storm alerts, reports and information for Portsmouth, RI, US with The Weather Network. Mostly cloudy throughout the day. See long range weather forecasts for the next 60 days from The Old Farmerâs Almanac! Reset Map, or Add PWS. A chance of snow. Want to know what the weather is now? Everything you need to be ready to step out prepared. Up to 90 days of daily highs, lows, and precipitation chances. Get the latest 7 Day weather for Portsmouth, RI, US including weather news, video, warnings and interactive maps from the weather experts. Find the most current and reliable 7 day weather forecasts, storm alerts, reports and information for [city] with The Weather Network.