PORTSMOUTH, NH 03803 Weather Forecast & Current Conditions

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03803 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
PORTSMOUTH, NH Current Weather
1:55 AM EDT JUN 18, 2026
Overcast 61°F
Feels Like:	61°F
Dewpoint:	57°F
Rel. Hum.:	87%
Visibility:	10 miles
Wind:	Calm
Pressure:	29.80 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 2025 Hurricanes	PORTSMOUTH, NH 03803 Weather Forecast	Snowfall Forecast pages Snow Depth pages

TODAY
Showers likely this morning, then showers and scattered thunderstorms this afternoon. Some thunderstorms may be severe with damaging winds. Highs in the upper 70s. South winds 10 to 15 mph with gusts up to 35 mph. Chance of rain near 100 percent.

TONIGHT
Partly cloudy with showers likely with scattered thunderstorms in the evening, then mostly clear after midnight. Some thunderstorms may be severe with damaging winds. Lows in the lower 60s. Southwest winds around 10 mph. Gusts up to 30 mph in the evening. Chance of rain 70 percent.

JUNETEENTH
Mostly sunny. Highs in the lower 80s. West winds 10 to 15 mph with gusts up to 25 mph.

FRIDAY NIGHT
Mostly clear. Lows around 60. West winds around 10 mph with gusts up to 20 mph.

SATURDAY
Mostly sunny. Highs in the upper 70s. West winds 10 to 15 mph with gusts up to 25 mph.

SATURDAY NIGHT
Partly cloudy in the evening, then becoming mostly clear. Lows in the upper 50s.

SUNDAY
Partly sunny. A chance of showers in the afternoon. Highs in the upper 70s. Chance of rain 40 percent.

SUNDAY NIGHT
Partly cloudy. A chance of showers in the evening. Lows in the upper 50s. Chance of rain 40 percent.

MONDAY
Partly sunny in the morning, then becoming mostly cloudy. A chance of showers. Highs in the mid 70s. Chance of rain 50 percent.

MONDAY NIGHT
Showers likely. Lows in the upper 50s. Chance of rain 60 percent.

TUESDAY
Partly sunny with a 40 percent chance of showers. Highs in the lower 80s.

TUESDAY NIGHT
Partly cloudy in the evening, then clearing. Lows around 60.

WEDNESDAY
Mostly sunny. Highs in the lower 80s.

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 6/17/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Thursday
18 JUN 2026

2 AM

63°

64°

Mostly Cloudy

31%
RAIN
<.01 in

0% Thunder
( 9% severe)

S 5

72%

54°

Low 60°

5 AM

61°

60°

Mostly Cloudy

S 7

81%

55°

High 78°

8 AM

63°

62°

Mostly Cloudy

73%
RAIN
.5–1 in

0% Thunder
( 10% severe)

SSE 10

81%

57°

Mostly Cloudy

Rain

11 AM

67°

67°

Mostly Cloudy

SSE 15

78%

60°

2 PM

70°

70°

Mostly Cloudy

93%
RAIN
***

0% Thunder
( 26% severe)

SSE 21

78%

63°

5 PM

74°

74°

Mostly Cloudy

S 16

84%

69°

8 PM

74°

74°

Partly Cloudy

17%
RAIN
.01–.1 in

0% Thunder
( 15% severe)

SSW 9

82%

68°

11 PM

69°

69°

Clear

WSW 9

84%

64°

Friday
19 JUN 2026

2 AM

66°

66°

Partly Cloudy

0%

0% Thunder
( 0% severe)

WSW 10

78%

59°

Low 63°

5 AM

63°

62°

Partly Cloudy

WSW 12

78%

56°

High 83°

8 AM

68°

68°

Clear

0%

0% Thunder
( 0% severe)

W 13

65%

56°

Partly Cloudy

11 AM

77°

79°

Partly Cloudy

W 15

47%

55°

2 PM

82°

81°

Partly Cloudy

1%

0% Thunder
( 3% severe)

W 16

38%

54°

5 PM

81°

81°

Clear

W 16

39%

54°

8 PM

75°

75°

Clear

0%

0% Thunder
( 2% severe)

W 12

46%

53°

11 PM

68°

68°

Clear

W 10

57%

52°


PORTSMOUTH, NH extended weather forecast
Saturday 20 JUN 2026	Sunday 21 JUN 2026	Monday 22 JUN 2026	Tuesday 23 JUN 2026	Wednesday 24 JUN 2026
Low 61°	Low 57°	Low 56°	Low 57°	Low 60°
High 77°	High 72°	High 71°	High 76°	High 79°

Overcast 28% Rain	Partly Cloudy 35% Rain	Mostly Cloudy 56% Rain	Mostly Cloudy 54% Rain	Partly Cloudy 22% Rain

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