PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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PORTSMOUTH, NH
Current Weather

4:55 AM EDT JUL 20, 2026
Clear
59°F
Feels Like: 58°F
Dewpoint: 50°F
Rel. Hum.: 72%
Visibility: 10 miles
Wind: WSW at 6 mph
Pressure: 29.89 inches
Last 72 hours

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PORTSMOUTH, NH 03803
Weather Forecast

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Snow Depth pages
TODAY
Mostly sunny. Highs in the lower 80s. Light and variable winds, becoming south around 10 mph this afternoon.
TONIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows around 60. Light and variable winds.
TUESDAY
Partly sunny. Highs in the upper 70s. South winds 10 to 15 mph with gusts up to 25 mph.
TUESDAY NIGHT
A chance of thunderstorms in the evening. Showers with lows in the lower 60s. Southeast winds around 10 mph with gusts up to 25 mph in the evening, becoming light and variable. Chance of rain near 100 percent.
WEDNESDAY
Showers likely. Humid with highs in the mid 80s. Southwest winds around 10 mph. Chance of rain 70 percent.
WEDNESDAY NIGHT
Showers likely in the evening, then mostly clear after midnight. Lows around 60. Chance of rain 60 percent.
THURSDAY
Mostly sunny. Highs around 80.
THURSDAY NIGHT
Mostly clear. Lows in the upper 50s.
FRIDAY
Sunny. Highs in the upper 70s.
FRIDAY NIGHT
Mostly clear. Lows around 60.
SATURDAY
Mostly sunny. Highs around 80.
SATURDAY NIGHT
Mostly clear. Lows in the lower 60s.
SUNDAY
Mostly sunny. Highs in the lower 80s.

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  8:00 PM EDT  7/19/2026
Monday
20 JUL 2026
PORTSMOUTH, NH 03803 weather forecast Day 1, 0 hours 2 AM 60° 60° Clear 0%

0% Thunder
( 0% severe)
W   6 69% 50°
Low 56° PORTSMOUTH, NH 03803 weather forecast Day 1, 3 hours 5 AM 57° 56° Partly Cloudy W   7 77% 50°
High 83° PORTSMOUTH, NH 03803 weather forecast Day 1, 6 hours 8 AM 65° 65° Partly Cloudy 0%

0% Thunder
( 0% severe)
W   7 65% 53°

Clear



PORTSMOUTH, NH 03803 weather forecast Day 1, 9 hours 11 AM 76° 78° Clear W   7 39% 49°
PORTSMOUTH, NH 03803 weather forecast Day 1, 12 hours 2 PM 80° 80° Clear 0%

0% Thunder
( 1% severe)
WSW   7 35% 50°
PORTSMOUTH, NH 03803 weather forecast Day 1, 15 hours 5 PM 79° 79° Clear S   8 39% 52°
PORTSMOUTH, NH 03803 weather forecast Day 1, 18 hours 8 PM 71° 71° Partly Cloudy 0%

0% Thunder
( 1% severe)
S   8 59% 56°
PORTSMOUTH, NH 03803 weather forecast Day 1, 21 hours 11 PM 66° 66° Partly Cloudy SSW   6 70% 56°
Tuesday
21 JUL 2026
PORTSMOUTH, NH 03803 weather forecast Day 2, 0 hours 2 AM 63° 63° Mostly Cloudy 0%

0% Thunder
( 0% severe)
SSW   6 78% 56°
Low 60° PORTSMOUTH, NH 03803 weather forecast Day 2, 3 hours 5 AM 61° 61° Mostly Cloudy S   6 84% 56°
High 79° PORTSMOUTH, NH 03803 weather forecast Day 2, 6 hours 8 AM 66° 66° Mostly Cloudy 1%

0% Thunder
( 1% severe)
S   7 78% 59°

Mostly Cloudy

Chance of Rain

PORTSMOUTH, NH 03803 weather forecast Day 2, 9 hours 11 AM 75° 75° Mostly Cloudy SSE   12 60% 60°
PORTSMOUTH, NH 03803 weather forecast Day 2, 12 hours 2 PM 77° 79° Mostly Cloudy 42%
RAIN
>2 in
0% Thunder
( 33% severe)
SSE   16 56% 60°
PORTSMOUTH, NH 03803 weather forecast Day 2, 15 hours 5 PM 74° 74° Mostly Cloudy SE   16 66% 62°
PORTSMOUTH, NH 03803 weather forecast Day 2, 18 hours 8 PM 70° 70° Mostly Cloudy 82%
RAIN
***
0% Thunder
( 39% severe)
SE   12 78% 63°
PORTSMOUTH, NH 03803 weather forecast Day 2, 21 hours 11 PM 67° 67° Overcast SE   9 100% 67°

PORTSMOUTH, NH extended weather forecast

Wednesday
22 JUL 2026
Thursday
23 JUL 2026
Friday
24 JUL 2026
Saturday
25 JUL 2026
Sunday
26 JUL 2026
Low 66° Low 61° Low 57° Low 59° Low 61°
High 83° High 78° High 80° High 82° High 82°
PORTSMOUTH, NH 03803 weather forecast Day 3 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
Overcast
96% Rain
Partly Cloudy
31% Rain
Partly Cloudy
15% Rain
Partly Cloudy
19% Rain
Partly Cloudy
17% Rain
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