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