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