Marine Weather Net

Portsmouth, NH Weather Forecast




Portsmouth, New Hampshire

 Lat: 43.07N, Lon: 70.76W

Current Conditions Updated: 855 AM EDT THU SEP 17 2026

Mostly Cloudy
Temp: 69°F
  • Humidity:
  • 73%
  • Winds:
  • N/A
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.25 in.
  • Dewpoint:
  • 60°F
  • Heat index:
  • 69°F

  • Sunrise:
  • 6:22 AM EDT
  • Sunset:
  • 6:50 PM EDT
  • Moonrise:
  • 1:34 PM EDT
  • Moonset:
  • 9:56 PM EDT

TODAY

PARTLY SUNNY
Hi: 71°F
Lo: 65°F
Precip: 40%

FRIDAY

MOSTLY SUNNY
Hi: 75°F
Lo: 49°F

SATURDAY

MOSTLY SUNNY
Hi: 65°F
Lo: 50°F

SUNDAY

CHANCE OF SHOWERS
Hi: 61°F
Lo: 50°F
Precip: 70%
Weather Forecast In Detail:
Forecast Issued: 801 AM EDT Thu Sep 17 2026

Today...Partly sunny this morning, then mostly cloudy with a chance of showers this afternoon. Highs in the lower 70s. Light and variable winds. Chance of rain 40 percent.
Tonight...A slight chance of thunderstorms. Showers. Patchy fog. Humid with lows in the lower 60s. Light and variable winds. Chance of rain 90 percent.
Friday...Mostly sunny. Highs in the mid 70s. Northwest winds around 10 mph with gusts up to 25 mph.
Friday Night...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 40s. Northwest winds around 10 mph with gusts up to 20 mph in the evening, becoming light and variable.
Saturday...Mostly sunny. Highs in the mid 60s. Light and variable winds.
Saturday Night...Partly cloudy. Lows around 50.
Sunday...A chance of showers in the morning, then showers likely in the afternoon. Highs in the lower 60s. Chance of rain 70 percent.
Sunday Night...Showers likely, mainly in the evening. Lows around 50. Chance of rain 70 percent.
Monday...Partly sunny. Highs in the mid 60s.
Monday Night...Partly cloudy. Lows in the upper 40s.
Tuesday...Partly sunny. Highs in the lower 60s.
Tuesday Night...Mostly clear. Lows in the upper 40s.
Wednesday...Mostly sunny. Highs in the lower 60s.
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