Portsmouth Weather

Current Conditions for Portsmouth NH and the Seacoast

Longitude W70.8 – Latitude N43.1 • Rockingham County, New Hampshire, USA

 

Forecast

Tonight: Partly cloudy this evening, then clearing. Lows around 17. West winds around 10 mph, becoming northwest after midnight.

Saturday: Partly sunny in the morning, then mostly cloudy with a chance of snow in the afternoon. Highs in the mid 20s. North winds around 10 mph, becoming northeast in the afternoon. Chance of snow 30 percent.

Saturday Night: Snow. Patchy blowing snow after midnight. Snow may be heavy at times after midnight. Snow accumulation of 6 to 10 inches. Lows around 18. Northeast winds around 10 mph with gusts up to 20 mph, increasing to 15 to 20 mph with gusts up to 30 mph after midnight. Chance of snow near 100 percent.

Sunday: Patchy blowing snow in the morning. Snow, sleet with a chance of freezing rain in the morning, then snow likely with sleet in the afternoon. Precipitation may be heavy at times in the morning. Additional heavy snow accumulation. Highs in the upper 20s. Northeast winds 15 to 20 mph, becoming north 10 to 15 mph in the afternoon. Gusts up to 35 mph. Chance of precipitation near 100 percent.

Sunday Night: Mostly cloudy with a 40 percent chance of snow. Lows around 4 above. Northwest winds 10 to 15 mph with gusts up to 30 mph. Wind chill values as low as 12 below after midnight.

Martin Luther King Jr Day: Mostly cloudy. Areas of blowing snow. Highs 10 to 15.

Monday Night: Partly cloudy. Lows zero to 5 above zero.

Tuesday: Mostly sunny. Highs in the mid 20s.

Tuesday Night: Partly cloudy in the evening, then becoming mostly cloudy. Not as cold with lows around 20.

Wednesday: Cloudy. A chance of rain and snow showers in the morning, then a chance of rain showers in the afternoon. Warmer with highs in the lower 40s. Chance of precipitation 40 percent.

Wednesday Night: Mostly cloudy with a chance of snow and rain showers. Lows around 30. Chance of precipitation 40 percent.

Thursday: Mostly cloudy with a 40 percent chance of snow showers. Highs in the upper 30s.

Thursday Night: Mostly cloudy in the evening, then becoming partly cloudy. A 40 percent chance of snow showers. Lows around 20.

Friday: Partly sunny. Highs in the lower 30s.

Marine Forecast

SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM EST THIS EVENING THROUGH SATURDAY MORNINGGALE WATCH IN EFFECT FROM LATE SATURDAY NIGHT THROUGH MONDAY MORNING
TONIGHT: W winds 10 to 15 kt, becoming NW 15 to 20 kt after midnight. Seas 2 to 4 ft.
SAT: NE winds 10 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.
SAT NIGHT: NE winds 10 to 20 kt with gusts up to 30 kt, becoming E 20 to 30 kt with gusts up to 40 kt after midnight. Seas 2 to 4 ft, building to 6 to 9 ft after midnight. Snow. Vsby 1 to 3 NM in the evening.
SUN: NE winds 25 to 30 kt, becoming N 20 to 30 kt in the afternoon. Gusts up to 40 kt. Seas 10 to 15 ft. Snow, rain and sleet in the morning, then sleet with snow likely in the afternoon.
SUN NIGHT: NW winds 20 to 30 kt with gusts up to 40 kt. Seas 8 to 11 ft. A chance of snow. Light freezing spray after midnight.
MON: NW winds 20 to 30 kt with gusts up to 40 kt. Seas 5 to 8 ft, subsiding to 4 to 6 ft in the afternoon. A chance of snow in the morning. Moderate freezing spray. Vsby 1 to 3 NM.
MON NIGHT: NW winds 20 to 25 kt, becoming 15 to 25 kt after midnight. Seas 4 to 6 ft. Moderate freezing spray. Vsby 1 to 3 NM in the evening.
TUE: NW winds 10 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft.
TUE NIGHT: SW winds 10 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.
WED: SW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. A chance of rain and snow showers. Vsby 1 to 3 NM.
WED NIGHT: W winds 10 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. A chance of rain and snow showers. Vsby 1 to 3 NM.