PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

10:55 PM EDT MAR 18, 2026
Broken Clouds
30°F
Feels Like: 23°F
Dewpoint: 18°F
Rel. Hum.: 58%
Visibility: 10 miles
Wind: SE at 7 mph
Pressure: 30.39 inches
Last 72 hours

Local Area Snow Depth

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PORTSMOUTH, NH 03803
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Partly cloudy. Lows in the lower 20s. Southeast winds around 10 mph with gusts up to 20 mph this evening, becoming light and variable.
THURSDAY
Partly sunny. Highs around 40. Light and variable winds, becoming southeast around 10 mph in the afternoon.
THURSDAY NIGHT
Partly cloudy. Lows in the upper 20s. South winds around 10 mph in the evening, becoming light and variable.
FRIDAY
Partly sunny. Highs in the upper 40s. Light and variable winds.
FRIDAY NIGHT
Mostly cloudy. A chance of rain showers in the evening, then rain showers likely after midnight. Lows in the mid 30s. Light and variable winds. Chance of rain 60 percent.
SATURDAY
Rain showers likely, mainly in the morning. Highs around 50. Chance of rain 60 percent.
SATURDAY NIGHT
Mostly cloudy. A chance of rain after midnight. Lows in the mid 30s. Chance of rain 30 percent.
SUNDAY
Mostly cloudy in the morning, then becoming partly sunny. A 40 percent chance of rain. Highs in the lower 50s.
SUNDAY NIGHT
Partly cloudy. A chance of rain in the evening. Lows in the upper 20s. Chance of rain 30 percent.
MONDAY
Partly sunny. Highs in the upper 30s.
MONDAY NIGHT
Mostly clear. Lows in the lower 20s.
TUESDAY
Partly sunny. Highs in the upper 30s.
TUESDAY NIGHT
Mostly cloudy. Lows in the mid 20s.

Visible Weather Satellite
PORTSMOUTH, NH 03803
Infrared Weather Satellite
PORTSMOUTH, NH 03803
NEXRAD Weather Radar
PORTSMOUTH, NH 03803

PORTSMOUTH, NH 3 hourly weather forecast

weather forecast created  7:00 AM EST  3/18/2026
Wednesday
18 MAR 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 1 PM 33° 30° Mostly Cloudy 0%

0% Thunder
( 1% severe)
NW   2 20%
High 35° PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 4 PM 34° 30° Mostly Cloudy SSE   5 23%
Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 7 PM 30° 24° Partly Cloudy 0%

0% Thunder
( 0% severe)
SSE   6 37%
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 10 PM 29° 24° Partly Cloudy SSE   5 47% 13°
Thursday
19 MAR 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 1 AM 27° 24° Mostly Cloudy 3%

0% Thunder
( 0% severe)
S   2 57% 15°
Low 24° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 4 AM 26° 23° Mostly Cloudy S   1 60% 15°
High 40° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 7 AM 27° 24° Mostly Cloudy 5%

0% Thunder
( 0% severe)
SSE   1 57% 15°

Mostly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 10 AM 35° 31° Mostly Cloudy SSE   5 43% 16°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 1 PM 39° 33° Partly Cloudy 4%

0% Thunder
( 0% severe)
SSE   9 37% 16°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 4 PM 39° 33° Mostly Cloudy SSE   9 43% 19°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 7 PM 35° 30° Mostly Cloudy 1%

0% Thunder
( 0% severe)
SSE   6 60% 23°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 10 PM 34° 29° Mostly Cloudy S   6 63% 23°
Friday
20 MAR 2026
PORTSMOUTH, NH 03803 weather forecast Day 3, 0 hours 1 AM 32° 26° Mostly Cloudy 5%

0% Thunder
( 0% severe)
SSW   6 71% 24°
Low 28° PORTSMOUTH, NH 03803 weather forecast Day 3, 3 hours 4 AM 30° 25° Partly Cloudy SW   5 74% 23°
High 50° PORTSMOUTH, NH 03803 weather forecast Day 3, 6 hours 7 AM 31° 26° Clear 3%

0% Thunder
( 0% severe)
WSW   5 74% 24°

Increasing Clouds



PORTSMOUTH, NH 03803 weather forecast Day 3, 9 hours 10 AM 43° 40° Partly Cloudy W   5 50% 26°
PORTSMOUTH, NH 03803 weather forecast Day 3, 15 hours 1 PM 48° 44° Mostly Cloudy 9%

0% Thunder
( 1% severe)
SSW   8 40% 25°
PORTSMOUTH, NH 03803 weather forecast Day 3, 18 hours 4 PM 47° 44° Mostly Cloudy S   7 47% 28°
PORTSMOUTH, NH 03803 weather forecast Day 3, 21 hours 7 PM 42° 39° Mostly Cloudy     S   5 62% 30°

PORTSMOUTH, NH extended weather forecast

Saturday
21 MAR 2026
Sunday
22 MAR 2026
Monday
23 MAR 2026
Tuesday
24 MAR 2026
Wednesday
25 MAR 2026
Low 36° Low 35° Low 31° Low 25° Low 23°
High 52° High 51° High 38° High 38° High 42°
PORTSMOUTH, NH 03803 weather forecast Day 4 PORTSMOUTH, NH 03803 weather forecast Day 5 PORTSMOUTH, NH 03803 weather forecast Day 6 PORTSMOUTH, NH 03803 weather forecast Day 7 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Overcast
67% Rain
Overcast
39% Rain/Snow
Overcast
71% Ice
Mostly Cloudy
38% Snow
Partly Cloudy
20% Rain/Snow
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