Marine Weather Net

Portsmouth, NH Weather Forecast




Portsmouth, New Hampshire

 Lat: 43.07N, Lon: 70.76W

Current Conditions Updated: 1018 AM EDT WED AUG 19 2026

Mostly Cloudy
Temp: 73°F
  • Humidity:
  • 78%
  • Winds:
  • 3 MPH W
  • Gusts:
  • N/A MPH
  • Barometer:
  • 29.86 in.
  • Dewpoint:
  • 66°F
  • Heat index:
  • 74°F

  • Sunrise:
  • 5:51 AM EDT
  • Sunset:
  • 7:38 PM EDT
  • Moonrise:
  • 1:42 PM EDT
  • Moonset:
  • 10:40 PM EDT

TODAY

PARTLY SUNNY
Hi: 85°F
Lo: 65°F

THURSDAY

PARTLY SUNNY
Hi: 81°F
Lo: 60°F
Precip: 20%

FRIDAY

MOSTLY SUNNY
Hi: 79°F
Lo: 59°F

SATURDAY

PARTLY SUNNY
Hi: 75°F
Lo: 59°F
Precip: 30%
Weather Forecast In Detail:
Forecast Issued: 801 AM EDT Wed Aug 19 2026

Today...Patchy fog this morning. Partly sunny. Highs in the mid 80s. Light and variable winds.
Tonight...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s. Light and variable winds.
Thursday...Partly sunny. Patchy fog in the morning. A slight chance of showers in the afternoon. Highs in the lower 80s. Light and variable winds. Chance of rain 20 percent.
Thursday Night...Mostly cloudy in the evening, then clearing. Lows around 60. Light and variable winds.
Friday...Mostly sunny. Highs in the upper 70s. Light and variable winds.
Friday Night...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 50s.
Saturday...Partly sunny. A chance of showers in the afternoon. Highs in the mid 70s. Chance of rain 30 percent.
Saturday Night...Mostly cloudy with a 40 percent chance of showers. Lows in the upper 50s.
Sunday...Mostly cloudy with a 40 percent chance of showers. Highs in the upper 70s.
Sunday Night...Partly cloudy. A chance of showers in the evening. Lows around 60. Chance of rain 40 percent.
Monday...Partly sunny. Highs in the lower 80s.
Monday Night...Mostly clear. Lows in the upper 50s.
Tuesday...Mostly sunny. Highs in the lower 80s.
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