PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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03803 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
PORTSMOUTH, NH Current Weather
10:55 AM EDT AUG 21, 2026
Broken Clouds 77°F
Feels Like:	79°F
Dewpoint:	55°F
Rel. Hum.:	47%
Visibility:	10 miles
Wind:	NE at 10 mph, gusts to 20
Pressure:	30.10 inches
Last 72 hours
Local Area Snow Depth
New Hampshire Current Weather
New Hampshire MOS Forecast Weather

Weather Map

(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

TODAY
Partly sunny. Highs in the mid 70s. Northeast winds around 10 mph with gusts up to 20 mph.

TONIGHT
Partly cloudy in the evening, then mostly cloudy with a slight chance of showers after midnight. Lows in the upper 50s. Light and variable winds. Chance of rain 20 percent.

SATURDAY
Cloudy with a 40 percent chance of showers. Highs in the lower 70s. Northeast winds around 10 mph with gusts up to 20 mph.

SATURDAY NIGHT
Cloudy. A chance of showers in the evening, then showers likely after midnight. Patchy fog in the evening, then areas of fog after midnight. Lows in the lower 60s. Northeast winds around 10 mph in the evening, becoming light and variable. Chance of rain 70 percent.

SUNDAY
Areas of fog in the morning. Mostly cloudy. Showers likely, mainly in the morning. Humid with highs in the upper 70s. Light and variable winds. Chance of rain 70 percent.

SUNDAY NIGHT
Mostly cloudy with a chance of showers in the evening, then partly cloudy after midnight. Lows in the lower 60s. Chance of rain 40 percent.

MONDAY
Mostly sunny. Highs in the lower 80s.

MONDAY NIGHT
Mostly clear. Lows in the upper 50s.

TUESDAY
Mostly sunny. Highs in the upper 70s.

TUESDAY NIGHT
Mostly clear. Lows in the upper 50s.

WEDNESDAY
Mostly sunny. Highs in the lower 80s.

WEDNESDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 60s.

THURSDAY
Partly sunny with a chance of showers. Highs around 80. Chance of rain 40 percent.

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 PM EDT 8/20/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Friday
21 AUG 2026

2 AM

66°

66°

Mostly Cloudy

10%
RAIN
<.01 in

0% Thunder
( 1% severe)

NNW 3

81%

60°

Low 63°

5 AM

64°

64°

Mostly Cloudy

N 6

84%

59°

High 78°

8 AM

66°

66°

Mostly Cloudy

8%

0% Thunder
( 0% severe)

NNE 7

75%

58°

Mostly Cloudy

11 AM

73°

73°

Mostly Cloudy

ENE 10

55%

56°

2 PM

75°

75°

Partly Cloudy

2%

0% Thunder
( 0% severe)

E 10

52%

56°

5 PM

73°

73°

Partly Cloudy

E 8

53%

55°

8 PM

67°

67°

Partly Cloudy

6%

0% Thunder
( 1% severe)

ENE 3

73%

58°

11 PM

63°

64°

Partly Cloudy

CALM

90%

60°

Saturday
22 AUG 2026

2 AM

62°

63°

Mostly Cloudy

13%
RAIN
<.01 in

0% Thunder
( 0% severe)

NNE 3

97%

61°

Low 60°

5 AM

61°

60°

Mostly Cloudy

NE 8

97%

60°

High 74°

8 AM

64°

64°

Mostly Cloudy

46%
RAIN
.5–1 in

0% Thunder
( 1% severe)

NE 9

87%

60°

Mostly Cloudy

Rain Likely

11 AM

69°

69°

Mostly Cloudy

NE 12

76%

61°

2 PM

71°

71°

Mostly Cloudy

62%
RAIN
***

0% Thunder
( 3% severe)

NE 12

73%

62°

5 PM

69°

69°

Mostly Cloudy

NE 10

78%

62°

8 PM

67°

67°

Mostly Cloudy

51%
RAIN
.25–.5 in

0% Thunder
( 2% severe)

NE 8

87%

63°

11 PM

65°

65°

Mostly Cloudy

NNE 5

100%

65°


PORTSMOUTH, NH extended weather forecast
Sunday 23 AUG 2026	Monday 24 AUG 2026	Tuesday 25 AUG 2026	Wednesday 26 AUG 2026	Thursday 27 AUG 2026
Low 59°	Low 62°	Low 58°	Low 58°	Low 61°
High 73°	High 83°	High 78°	High 82°	High 80°

Overcast 68% Rain	Mostly Cloudy 54% Rain	Partly Cloudy 19% Rain	Partly Cloudy 23% Rain	Mostly Cloudy 37% Rain

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