| NWS Forecast for: 18NM NNE Portsmouth NH Atlantic Ocean Issued by: National Weather Service Gray/Portland, ME Last Update: 2:18 am EDT Jul 22, 2026 | |
Wednesday: SSW wind 5 to 10 kt. A slight chance of showers, with thunderstorms also possible after 2pm. Patchy fog before 9am. Seas 1 ft or less. Wednesday Night: Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less. Thursday: Variable winds 5 kt or less. Sunny. Seas 1 ft or less. Thursday Night: Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less. Friday: Variable winds 5 kt or less. Sunny. Seas 1 ft or less. Friday Night: Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less. Saturday: Variable winds 5 kt or less. Sunny. Seas 1 ft or less. Saturday Night: Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less. Sunday: Variable winds 5 kt or less. Mostly sunny. Seas 1 ft or less. | |
| Marine Point Forecast: 43.31°N 70.57°W Associated Zone Forecast which includes this point | |
Visit your local NWS office at: https://www.weather.gov/gyx/ |