Portsmouth Weather

Current Conditions for Portsmouth NH and the Seacoast

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

 

Forecast

Tonight: Mostly cloudy this evening, then becoming partly cloudy. Lows in the mid 60s. South winds around 10 mph this evening, becoming light and variable.

Sunday: Partly sunny. Hot with highs in the lower 90s. Southwest winds around 10 mph with gusts up to 20 mph. Heat index values in the upper 90s in the afternoon.

Sunday Night: Mostly clear. Humid with lows in the lower 70s. Southwest winds around 10 mph with gusts up to 20 mph. Heat index values in the mid 90s early in the evening.

Monday: Mostly sunny. Hot with highs in the lower 90s. Southwest winds around 10 mph. Heat index values in the mid 90s.

Monday Night: Mostly cloudy with a chance of showers. Humid with lows in the upper 60s. Southwest winds around 10 mph in the evening, becoming light and variable. Chance of rain 40 percent. Heat index values around 90 early in the evening.

Tuesday: Mostly cloudy with a chance of showers in the morning, then showers with a chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 80 percent.

Tuesday Night: A chance of thunderstorms. Showers, mainly in the evening. Lows in the mid 60s. Chance of rain 80 percent.

Wednesday: Mostly cloudy in the morning, then partly sunny with a chance of showers in the afternoon. Highs in the upper 70s. Chance of rain 30 percent.

Wednesday Night: Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers in the evening. Lows in the mid 60s. Chance of rain 30 percent.

Thursday: Mostly cloudy. A chance of showers in the afternoon. Highs in the mid 70s. Chance of rain 40 percent.

Thursday Night: Cloudy with a chance of showers. Lows in the lower 60s. Chance of rain 40 percent.

Friday: Mostly cloudy with a 30 percent chance of showers. Highs in the mid 70s.

Friday Night: Mostly cloudy. A chance of showers in the evening. Lows in the lower 60s. Chance of rain 30 percent.

Saturday: Partly sunny. Highs in the mid 70s.

Marine Forecast

SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY AFTERNOON THROUGH LATE SUNDAY NIGHT
TONIGHT: SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and S 2 ft at 8 seconds.
SUN: SW winds 10 to 15 kt, becoming S 15 to 20 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: S 4 ft at 5 seconds.
SUN NIGHT: SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 3 to 5 ft. Wave Detail: S 4 ft at 6 seconds.
MON: SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 6 seconds.
MON NIGHT: SW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 6 seconds. A chance of showers.
TUE: S winds 5 to 10 kt, becoming SE in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds. A chance of showers in the morning, then showers likely with a chance of tstms in the afternoon.
TUE NIGHT: SE winds around 5 kt, becoming NE after midnight. Seas around 2 ft. A chance of tstms. Showers likely, mainly in the evening.
WED: NE winds around 5 kt. Seas around 2 ft.
WED NIGHT: E winds around 5 kt. Seas around 2 ft.
THU: E winds 5 to 10 kt. Seas around 2 ft. A chance of showers in the afternoon.
THU NIGHT: E winds around 5 kt. Seas around 2 ft. A chance of showers. Winds and seas higher in and near tstms.