Flurries

Today

Chance Snow

37°

/ 26°

Portsmouth, New Hampshire

5 Day Forecast

Weather Forecast Accuracy Last Month (December)

The Weather Channel

100.00%

Weatherbit

100.00%

Microsoft

95.45%

OpenWeather

79.17%

Open-Meteo

78.03%

Foreca

77.65%

AerisWeather

77.65%

Pirate Weather

75.00%

NWS Digital Forecast

70.56%

Wetter.com

66.29%

World Weather Online

48.48%

Where is AccuWeather?

Weather Forecast Accuracy Last Year (2025)

Microsoft

87.41%

The Weather Channel

86.90%

AerisWeather

82.06%

Foreca

82.00%

Weatherbit

80.73%

NWS Digital Forecast

76.67%

Open-Meteo

72.25%

World Weather Online

70.64%

OpenWeather

70.44%

Pirate Weather

70.36%

Wetter.com

61.35%

Persistence

41.76%

ForecastAdvisor Fact

72.0% of Pirate Weather's high temperature forecasts for Portsmouth were within 3 degrees of actual temperatures last year.

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