PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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03803 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
PORTSMOUTH, NH Current Weather
4:55 PM EDT AUG 31, 2026
Few Clouds 72°F
Feels Like:	72°F
Dewpoint:	55°F
Rel. Hum.:	55%
Visibility:	10 miles
Wind:	SE at 13 mph
Pressure:	30.06 inches
Last 72 hours
Local Area Snow Depth
New Hampshire Current Weather
New Hampshire MOS Forecast Weather

Regional Weather Maps

(Automated weather data from NWS/FAA)

03803 WEATHER FORECAST
10-Day model forecast maps 2026 Hurricanes	PORTSMOUTH, NH 03803 Weather Forecast	Snowfall Forecast pages Snow Depth pages

TONIGHT
Partly cloudy. A slight chance of rain after midnight. Lows around 60. Light and variable winds. Chance of rain 20 percent.

TUESDAY
Rain likely. Humid with highs in the lower 70s. Light and variable winds, becoming southeast around 10 mph in the afternoon. Chance of rain 70 percent.

TUESDAY NIGHT
Cloudy with a 50 percent chance of rain. Lows in the upper 50s. Light and variable winds.

WEDNESDAY
Mostly cloudy. Highs around 70. East winds around 10 mph in the morning, becoming light and variable.

WEDNESDAY NIGHT
A chance of showers in the evening, then showers after midnight. Lows in the lower 60s. Chance of rain 90 percent.

THURSDAY
Showers with a chance of thunderstorms. Highs in the upper 70s. Chance of rain 90 percent.

THURSDAY NIGHT
Showers likely with a chance of thunderstorms in the evening. Lows in the lower 60s. Chance of rain 70 percent.

FRIDAY
Partly sunny. Highs in the upper 70s.

FRIDAY NIGHT
Partly cloudy. Lows in the upper 50s.

SATURDAY
Partly sunny. Highs in the lower 70s.

SATURDAY NIGHT
Partly cloudy. Lows in the mid 50s.

SUNDAY
Partly sunny. Highs in the lower 70s.

03803 WEATHER SATELLITE LOOPS

Visible Weather Satellite
PORTSMOUTH, NH 03803

Infrared Weather Satellite
PORTSMOUTH, NH 03803

03803 WEATHER RADAR LOOP

NEXRAD Weather Radar
PORTSMOUTH, NH 03803

MOS COMPUTER WEATHER FORECAST

PORTSMOUTH, NH 3 hourly weather forecast

weather forecast created 8:00 AM EDT 8/31/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Monday
31 AUG 2026

2 PM

74°

74°

Mostly Cloudy

0%

0% Thunder
( 0% severe)

SE 9

51%

55°

High 75°

5 PM

72°

72°

Clear

SSE 10

53%

54°

Partly Cloudy

8 PM

67°

67°

Partly Cloudy

3%

0% Thunder
( 2% severe)

SSE 7

68%

56°

11 PM

64°

65°

Mostly Cloudy

SSE 5

87%

60°

Tuesday
1 SEP 2026

2 AM

63°

64°

Mostly Cloudy

61%
RAIN
***

0% Thunder
( 5% severe)

SW 2

97%

62°

Low 61°

5 AM

63°

64°

Mostly Cloudy

CALM

100%

63°

High 72°

8 AM

64°

65°

Mostly Cloudy

72%
RAIN
***

0% Thunder
( 11% severe)

NE 3

97%

63°

Mostly Cloudy

Rain Likely

11 AM

68°

68°

Mostly Cloudy

ESE 8

84%

63°

2 PM

69°

69°

Mostly Cloudy

41%
RAIN
.01–.1 in

0% Thunder
( 5% severe)

ESE 9

78%

62°

5 PM

69°

69°

Mostly Cloudy

ESE 9

70%

59°

8 PM

65°

65°

Mostly Cloudy

16%
RAIN
<.01 in

0% Thunder
( 6% severe)

ESE 6

81%

59°

11 PM

62°

63°

Mostly Cloudy

ESE 3

93%

60°

Wednesday
2 SEP 2026

2 AM

61°

62°

Mostly Cloudy

3%

0% Thunder
( 4% severe)

CALM

97%

60°

Low 59°

5 AM

61°

61°

Overcast

E 5

97%

60°

High 72°

8 AM

63°

63°

Mostly Cloudy

7%

0% Thunder
( 2% severe)

E 6

90%

60°

Mostly Cloudy

11 AM

69°

69°

Mostly Cloudy

ESE 9

70%

59°

2 PM

70°

70°

Mostly Cloudy

19%
RAIN
.25–.5 in

0% Thunder
( 1% severe)

ESE 10

68%

59°

5 PM

69°

69°

Mostly Cloudy

ESE 9

68%

58°

8 PM

66°

66°

Mostly Cloudy

ESE 7

81%

60°


PORTSMOUTH, NH extended weather forecast
Thursday 3 SEP 2026	Friday 4 SEP 2026	Saturday 5 SEP 2026	Sunday 6 SEP 2026	Monday 7 SEP 2026
Low 59°	Low 59°	Low 55°	Low 54°	Low 56°
High 72°	High 74°	High 69°	High 71°	High 78°

Overcast 76% Rain	Overcast 44% Rain	Mostly Cloudy 35% Rain	Partly Cloudy 18% Rain	Partly Cloudy 20% Rain

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