For More Weather Information:

Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]
    • Today

      Today:SSE wind 15 to 20 km/h increasing to 20 to 25 km/h in the afternoon. Winds could gust as high as 35 km/h. A slight chance of showers and thunderstorms after 4pm.   Seas around 1 m.

      High: 22 °C

      ⇑SSE 25km/h
      1m

    • Tonight

      Tonight:SE wind 22 to 25 km/h becoming S 20 to 23 km/h after midnight. Winds could gust as high as 30 km/h. Showers and thunderstorms before 5am, then a chance of showers.  Patchy fog between 9pm and 2am.  Seas around 1 m.

      Low: 18 °C

      SE 25km/h⇓
      1m

    • Wednesday

      Wednesday:S wind 15 to 20 km/h. A chance of showers and thunderstorms, mainly after 3pm.   Seas around 1 m.

      High: 26 °C

      S 20km/h
      1m

    • Wednesday Night

      Wednesday Night:SW wind 10 to 15 km/h becoming W in the evening. A chance of showers and thunderstorms before 8pm.   Seas around 1 m.

      Low: 17 °C

      SW 15km/h
      1m

    • Thursday

      Thursday:WNW wind around 10 km/h becoming SW in the afternoon. Sunny. Seas around 1 m.

      High: 23 °C

      WNW 10km/h
      1m

    • Thursday Night

      Thursday Night:Variable winds 5 km/h or less. Mostly clear. Seas around 1 m.

      Low: 16 °C

      Light Wind
      1m

    • Friday

      Friday:NW wind 5 to 8 km/h becoming SE 7 to 10 km/h in the afternoon. Sunny. Seas around 1 m.

      High: 22 °C

      ⇑SE 10km/h
      1m

    • Friday Night

      Friday Night:SSE wind 5 to 10 km/h becoming WSW after midnight. Mostly clear. Seas around 1 m.

      Low: 16 °C

      SSE 10km/h
      1m

    • Saturday

      Saturday:Variable winds less than 5 km/h becoming SE 5 to 10 km/h in the afternoon. Sunny. Seas around 1 m.

      High: 22 °C

      ⇑SE 10km/h
      1m


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:44 am EDT Jul 21, 2026
Forecast Valid: 10am EDT Jul 21, 2026-6pm EDT Jul 27, 2026

View Nearby Observations

Detailed Forecast


Today
SSE wind 15 to 20 km/h increasing to 20 to 25 km/h in the afternoon. Winds could gust as high as 35 km/h. A slight chance of showers and thunderstorms after 4pm. Seas around 1 m.
Tonight
SE wind 22 to 25 km/h becoming S 20 to 23 km/h after midnight. Winds could gust as high as 30 km/h. Showers and thunderstorms before 5am, then a chance of showers. Patchy fog between 9pm and 2am. Seas around 1 m.
Wednesday
S wind 15 to 20 km/h. A chance of showers and thunderstorms, mainly after 3pm. Seas around 1 m.
Wednesday Night
SW wind 10 to 15 km/h becoming W in the evening. A chance of showers and thunderstorms before 8pm. Seas around 1 m.
Thursday
WNW wind around 10 km/h becoming SW in the afternoon. Sunny. Seas around 1 m.
Thursday Night
Variable winds 5 km/h or less. Mostly clear. Seas around 1 m.
Friday
NW wind 5 to 8 km/h becoming SE 7 to 10 km/h in the afternoon. Sunny. Seas around 1 m.
Friday Night
SSE wind 5 to 10 km/h becoming WSW after midnight. Mostly clear. Seas around 1 m.
Saturday
Variable winds less than 5 km/h becoming SE 5 to 10 km/h in the afternoon. Sunny. Seas around 1 m.

*Notices:

  1. This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
  2. The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

Point Forecast: 42.98°N 70.74°W
Last Update: 6:44 am EDT Jul 21, 2026
Forecast Valid: 10am EDT Jul 21, 2026-6pm EDT Jul 27, 2026
  Forecast Discussion
  Get as KML Get as XML

RADAR & SATELLITE IMAGES

 Link to Satellite Data