Portsmouth, NH Weather Forecast
Rockingham County, New Hampshire
Live radar, warnings and storm tracking for Portsmouth, with free alerts the moment it counts.
The next few hours
Taller, warmer bars mean heavier rain. Dotted means no reading for that hour.
Hour by hour
Sunrise and sunset
Next five days, scored 0 to 100The first day or two use the HRRR and NBM cloud layers. Later days only have total cloud, so treat them as a rough guide.
Know when sunset at this place will be worth a photo
We score every sunrise and sunset here from the cloud, haze and smoke forecast, and let you know when one is likely to light up. Sunrise the evening before, sunset a few hours ahead.
Seven-day outlook
Free alerts for Portsmouth
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
Portsmouth, NH at a glance
Portsmouth is home to about 22,733 people in Rockingham County, across 16 square miles. It ranks 13th by population of 125 places in New Hampshire with a forecast here. The nearest neighbour with its own forecast is Greenland, 4 miles away.
- County
- Rockingham County
- Population
- 22,733 2023 est.
- Land area
- 16 sq mi
- People per sq mi
- 1,452
- Forecast point
- 43.0606°N, 70.7803°W
How well can the network see Portsmouth?
The nearest Doppler radar is KGYX (Portland, ME), to the NNE. Its lowest scan passes about 4,900 ft above Portsmouth. The beam is above the lowest few thousand feet here, so a warning for Portsmouth can come before anything looks dramatic on radar.
The closest weather station is KPSM (Portsmouth Intl). Close enough that its readings are the conditions in town.
Forecasts near Portsmouth
- Greenland, NH4 mi
- Rye, NH4 mi
- Eliot, ME6 mi
- North Hampton, NH6 mi
- Stratham, NH7 mi
- Durham, NH8 mi
- Newmarket, NH8 mi
- Hampton, NH9 mi
Elsewhere in New Hampshire
ManchesterNashuaConcordDerryRochesterDoverAll New Hampshire forecasts →