| NWS Forecast for: 18NM NNE Portsmouth NH Atlantic Ocean Issued by: National Weather Service Gray/Portland, ME Last Update: 8:05 pm EDT Jul 11, 2025 |  |
| Tonight: Variable winds 5 km/h or less. Patchy fog after midnight. Seas 1 m or less. Saturday: SSE wind 5 to 8 km/h increasing to 7 to 10 km/h in the afternoon. A slight chance of showers and thunderstorms between 2pm and 3pm. Areas of fog before 11am. Seas 1 m or less. Saturday Night: Variable winds 5 km/h or less. Patchy fog between 7pm and 8pm. Seas 1 m or less. Sunday: S wind 10 to 15 km/h. Partly sunny. Seas 1 m or less. Sunday Night: S wind 5 to 10 km/h. Patchy fog after 1am. Seas 1 m or less. Monday: S wind around 10 km/h. A chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Seas 1 m or less. Monday Night: Variable winds 5 km/h or less. A chance of showers and thunderstorms before 8pm. Seas 1 m or less. Tuesday: W wind 5 to 10 km/h becoming S in the afternoon. Mostly sunny. Seas 1 m or less. Tuesday Night: Variable winds 5 km/h or less. Mostly clear. Seas 1 m 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/ |
