PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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03803 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
PORTSMOUTH, NH Current Weather
6:55 AM EDT SEP 16, 2026
Overcast 55°F
Feels Like:	54°F
Dewpoint:	52°F
Rel. Hum.:	90%
Visibility:	10 miles
Wind:	SSW at 5 mph
Pressure:	30.31 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
Mostly cloudy this morning, then clearing. Highs in the upper 70s. Light and variable winds.

TONIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 50s. Light and variable winds.

THURSDAY
Mostly cloudy. A chance of showers in the afternoon. Highs in the lower 70s. Light and variable winds. Chance of rain 40 percent.

THURSDAY NIGHT
Showers likely. Lows in the upper 50s. Light and variable winds. Chance of rain 70 percent.

FRIDAY
Mostly sunny. Highs in the mid 70s. Northwest winds around 10 mph. Gusts up to 25 mph in the afternoon.

FRIDAY NIGHT
Mostly clear. Lows in the upper 40s.

SATURDAY
Mostly sunny. Highs in the mid 60s.

SATURDAY NIGHT
Partly cloudy. Lows in the upper 40s.

SUNDAY
Mostly cloudy with a 50 percent chance of showers. Highs in the mid 60s.

SUNDAY NIGHT
Mostly cloudy with a 50 percent chance of showers. Lows around 50.

MONDAY
Partly sunny. Highs in the mid 60s.

MONDAY NIGHT
Partly cloudy in the evening, then mostly cloudy with a chance of showers after midnight. Lows around 50. Chance of rain 30 percent.

TUESDAY
Partly sunny. A chance of showers in the morning. Highs in the mid 60s. Chance of rain 30 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 9/15/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Wednesday
16 SEP 2026

2 AM

52°

52°

Partly Cloudy

5%

0% Thunder
( 0% severe)

SW 3

96%

51°

Low 50°

5 AM

51°

50°

Mostly Cloudy

SW 5

100%

51°

High 79°

8 AM

55°

53°

Mostly Cloudy

3%

0% Thunder
( 0% severe)

SW 7

90%

52°

Partly Cloudy

11 AM

67°

67°

Partly Cloudy

SW 7

65%

55°

2 PM

76°

78°

Partly Cloudy

2%

0% Thunder
( 0% severe)

S 8

52%

57°

5 PM

76°

78°

Partly Cloudy

S 8

58%

60°

8 PM

68°

68°

Partly Cloudy

0%

0% Thunder
( 0% severe)

S 6

73%

59°

11 PM

63°

64°

Partly Cloudy

WSW 2

93%

61°

Thursday
17 SEP 2026

2 AM

60°

61°

Mostly Cloudy

13%
RAIN
<.01 in

0% Thunder
( 0% severe)

N 2

100%

60°

Low 59°

5 AM

59°

60°

Mostly Cloudy

NNE 3

100%

59°

High 75°

8 AM

61°

62°

Mostly Cloudy

14%
RAIN
<.01 in

0% Thunder
( 2% severe)

NNE 3

93%

59°

Mostly Cloudy

Chance of Rain

11 AM

69°

69°

Mostly Cloudy

ENE 5

73%

60°

2 PM

71°

71°

Mostly Cloudy

37%
RAIN
***

0% Thunder
( 7% severe)

E 6

71%

61°

5 PM

68°

68°

Mostly Cloudy

E 7

78%

61°

8 PM

64°

65°

Mostly Cloudy

53%
RAIN
1–2 in

0% Thunder
( 16% severe)

SSE 3

90%

61°

11 PM

63°

64°

Mostly Cloudy

SSW 3

100%

63°


PORTSMOUTH, NH extended weather forecast
Friday 18 SEP 2026	Saturday 19 SEP 2026	Sunday 20 SEP 2026	Monday 21 SEP 2026	Tuesday 22 SEP 2026
Low 59°	Low 45°	Low 48°	Low 49°	Low 47°
High 78°	High 60°	High 65°	High 64°	High 62°

Mostly Cloudy 55% Rain	Partly Cloudy	Overcast 64% Rain	Partly Cloudy 30% Rain	Overcast 36% Rain

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