PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

9:55 PM EDT MAR 17, 2026
Clear
30°F
Feels Like: 19°F
Dewpoint: 5°F
Rel. Hum.: 30%
Visibility: 10 miles
Wind: W at 16 mph
Pressure: 29.95 inches
Last 72 hours

Local Area Snow Depth

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PORTSMOUTH, NH 03803
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Mostly clear. Lows around 20. West winds 15 to 20 mph with gusts up to 30 mph.
WEDNESDAY
Mostly sunny. Highs in the upper 30s. West winds around 10 mph with gusts up to 25 mph in the morning, becoming light and variable.
WEDNESDAY NIGHT
Partly cloudy. Lows in the lower 20s. Light and variable winds.
THURSDAY
Mostly sunny. Highs in the lower 40s. Light and variable winds, becoming south around 10 mph in the afternoon.
THURSDAY NIGHT
Partly cloudy in the evening, then becoming mostly 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.
FRIDAY NIGHT
Partly cloudy. Lows around 30.
SATURDAY
Partly sunny in the morning, then becoming mostly cloudy. A chance of snow in the morning. A chance of rain. Highs in the mid 40s. Chance of precipitation 40 percent.
SATURDAY NIGHT
Mostly cloudy with a chance of rain and snow. Lows in the lower 30s. Chance of precipitation 40 percent.
SUNDAY
A chance of snow in the morning. Mostly cloudy with a chance of rain. Highs around 50. Chance of precipitation 40 percent.
SUNDAY NIGHT
A chance of rain in the evening. Partly cloudy with a chance of snow. Lows around 30. Chance of precipitation 40 percent.
MONDAY
Mostly sunny. A chance of snow in the morning. Highs in the mid 40s. Chance of snow 30 percent.
MONDAY NIGHT
Mostly clear. Lows in the lower 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  3/17/2026
Tuesday
17 MAR 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 1 PM 40° 31° Partly Cloudy 0%

0% Thunder
( 0% severe)
W   20 30% 13°
High 41° PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 4 PM 37° 27° Partly Cloudy W   17 28%
Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 7 PM 32° 22° Partly Cloudy 1%

0% Thunder
( 0% severe)
W   14 32%
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 10 PM 28° 17° Partly Cloudy W   13 34%
Wednesday
18 MAR 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 1 AM 24° 14° Clear 0%

0% Thunder
( 0% severe)
W   10 37%
Low 19° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 4 AM 21° 11° Clear W   9 38%
High 35° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 7 AM 21° 11° Clear 0%

0% Thunder
( 0% severe)
W   8 36%

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 10 AM 28° 22° Partly Cloudy WNW   6 24% -1°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 1 PM 33° 30° Partly Cloudy 0%

0% Thunder
( 0% severe)
WNW   3 18% -2°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 4 PM 34° 30° Partly Cloudy S   5 21%
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 7 PM 29° 23° Partly Cloudy 0%

0% Thunder
( 0% severe)
SSE   6 39%
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 10 PM 29° 23° Partly Cloudy S   6 50% 14°
Thursday
19 MAR 2026
PORTSMOUTH, NH 03803 weather forecast Day 3, 0 hours 1 AM 27° 23° Partly Cloudy 0%

0% Thunder
( 0% severe)
S   3 54% 14°
Low 23° PORTSMOUTH, NH 03803 weather forecast Day 3, 3 hours 4 AM 25° 21° Partly Cloudy S   2 59% 14°
High 41° PORTSMOUTH, NH 03803 weather forecast Day 3, 6 hours 7 AM 26° 23° Partly Cloudy 1%

0% Thunder
( 0% severe)
S   2 60% 15°

Partly Cloudy



PORTSMOUTH, NH 03803 weather forecast Day 3, 9 hours 10 AM 35° 30° Partly Cloudy S   6 41% 15°
PORTSMOUTH, NH 03803 weather forecast Day 3, 15 hours 1 PM 40° 33° Partly Cloudy 1%

0% Thunder
( 0% severe)
SSE   10 35% 16°
PORTSMOUTH, NH 03803 weather forecast Day 3, 18 hours 4 PM 40° 34° Partly Cloudy SSE   9 41% 19°
PORTSMOUTH, NH 03803 weather forecast Day 3, 21 hours 7 PM 35° 29° Mostly Cloudy     SSE   7 57% 22°

PORTSMOUTH, NH extended weather forecast

Friday
20 MAR 2026
Saturday
21 MAR 2026
Sunday
22 MAR 2026
Monday
23 MAR 2026
Tuesday
24 MAR 2026
Low 30° Low 31° Low 34° Low 39° Low 26°
High 49° High 48° High 52° High 46° 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
Mostly Cloudy
11% Rain/Snow
Mostly Cloudy
20% Rain/Snow
Overcast
31% Rain/Snow
Mostly Cloudy
56% Rain/Snow
Partly Cloudy
10% Rain/Snow
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