Marine Weather Net

Portsmouth, NH Weather Forecast




Portsmouth, New Hampshire

 Lat: 43.07N, Lon: 70.76W

Current Conditions Updated: 455 PM EDT THU MAR 12 2026

Snow
Temp: 41°F
  • Humidity:
  • 48%
  • Winds:
  • 14 MPH WNW
  • Gusts:
  • 18 MPH
  • Barometer:
  • 29.63 in.
  • Dewpoint:
  • 23°F
  • Heat index:
  • 41°F

  • Sunrise:
  • 6:59 AM EDT
  • Sunset:
  • 6:44 PM EDT
  • Moonrise:
  • 3:33 AM EDT
  • Moonset:
  • 11:48 AM EDT

TONIGHT

CHANCE OF SNOW
Lo: 25°F
Precip: 50%

FRIDAY

PARTLY SUNNY
Hi: 41°F
Lo: 31°F
Precip: 30%

SATURDAY

PARTLY SUNNY
Hi: 45°F
Lo: 25°F
Precip: 40%

SUNDAY

PARTLY SUNNY
Hi: 41°F
Lo: 31°F
Weather Forecast In Detail:
Forecast Issued: 501 PM EDT Thu Mar 12 2026

Tonight...Cloudy with a chance of snow in the evening, then mostly clear after midnight. Lows in the mid 20s. Northwest winds around 10 mph with gusts up to 25 mph. Chance of snow 50 percent.
Friday...Sunny in the morning, then partly sunny with a chance of snow with a slight chance of rain in the afternoon. Highs in the lower 40s. West winds around 10 mph, becoming south with gusts up to 20 mph in the afternoon. Chance of precipitation 30 percent.
Friday Night...Cloudy in the evening, then becoming partly cloudy. A chance of snow and rain. Lows in the lower 30s. South winds around 10 mph with gusts up to 20 mph. Chance of precipitation 50 percent.
Saturday...Partly sunny. A chance of rain in the morning. Highs in the mid 40s. West winds 15 to 20 mph with gusts up to 35 mph. Chance of rain 40 percent.
Saturday Night...Mostly clear. Lows in the mid 20s.
Sunday...Partly sunny in the morning, then becoming mostly cloudy. Highs in the lower 40s.
Sunday Night...Cloudy. A chance of rain after midnight. Lows in the lower 30s. Chance of rain 50 percent.
Monday...Rain. Highs in the upper 50s. Chance of rain near 100 percent.
Monday Night...Rain. Lows in the mid 30s. Chance of rain near 100 percent.
Tuesday...Mostly cloudy with a chance of rain in the morning, then partly sunny in the afternoon. Highs in the upper 40s. Chance of rain 50 percent.
Tuesday Night...Partly cloudy in the evening, then clearing. Lows around 20.
Wednesday...Mostly sunny. Highs in the mid 30s.
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