| NWS Forecast for: 18NM NNE Portsmouth NH Atlantic Ocean Issued by: National Weather Service Gray/Portland, ME Last Update: 11:49 pm EDT Jul 2, 2025 | |
| Overnight: Variable winds 5 km/h or less. Partly cloudy. Seas 1 m or less. Thursday: NW wind 5 to 8 km/h becoming SSE 7 to 10 km/h in the morning. A slight chance of showers and thunderstorms after 4pm. Seas 1 m or less. Thursday Night: Variable winds 5 km/h or less. A slight chance of showers and thunderstorms before 8pm. Seas 1 m or less. Independence Day: WNW wind around 10 km/h. Sunny. Seas 1 m or less. Friday Night: Variable winds 5 km/h or less. Mostly clear. Seas 1 m or less. Saturday: WNW wind 5 to 8 km/h becoming S 7 to 10 km/h in the afternoon. Sunny. Seas 1 m or less. Saturday Night: S wind around 10 km/h becoming SW after midnight. Partly cloudy. Seas 1 m or less. Sunday: SSW wind 10 to 15 km/h. Mostly sunny. Seas 1 m or less. Sunday Night: SW wind around 10 km/h. Partly cloudy. 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/ |