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 PM EDT MAY 18, 2026
Clear 55°F
Feels Like:	55°F
Dewpoint:	48°F
Rel. Hum.:	77%
Visibility:	10 miles
Wind:	Calm
Pressure:	30.08 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 2025 Hurricanes	PORTSMOUTH, NH 03803 Weather Forecast	Snowfall Forecast pages Snow Depth pages

TONIGHT
Mostly clear. Lows in the mid 50s. Light and variable winds.

TUESDAY
Partly sunny. A slight chance of showers in the afternoon. Warmer with highs in the upper 80s. Southwest winds around 10 mph. Chance of rain 20 percent.

TUESDAY NIGHT
Partly cloudy in the evening, then clearing. Lows in the upper 60s. Southwest winds around 10 mph.

WEDNESDAY
Partly sunny. A chance of showers in the afternoon. Warm with highs in the mid 80s. West winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent.

WEDNESDAY NIGHT
Partly cloudy. A chance of showers in the evening. Lows around 50. Chance of rain 30 percent.

THURSDAY
Mostly sunny. Cooler with highs in the mid 60s.

THURSDAY NIGHT
Mostly clear. Lows in the mid 40s.

FRIDAY
Partly sunny. Highs in the mid 60s.

FRIDAY NIGHT
Partly cloudy. A chance of showers after midnight. Lows in the mid 40s. Chance of rain 30 percent.

SATURDAY
Mostly cloudy with a 50 percent chance of showers. Highs in the upper 50s.

SATURDAY NIGHT
Mostly cloudy with a 50 percent chance of showers. Lows in the mid 40s.

SUNDAY
Mostly cloudy with a 50 percent chance of showers. Highs around 60.

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 5/18/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Monday
18 MAY 2026

2 PM

63°

62°

Partly Cloudy

1%

0% Thunder
( 5% severe)

SE 9

50%

44°

High 64°

5 PM

62°

61°

Partly Cloudy

ESE 9

56%

46°

Partly Cloudy

8 PM

58°

58°

Partly Cloudy

3%

0% Thunder
( 6% severe)

E 5

69%

48°

11 PM

58°

59°

Partly Cloudy

CALM

80%

52°

Tuesday
19 MAY 2026

2 AM

58°

59°

Partly Cloudy

2%

0% Thunder
( 4% severe)

S 1

83%

53°

Low 55°

5 AM

60°

60°

Partly Cloudy

SW 5

87%

56°

High 91°

8 AM

69°

69°

Partly Cloudy

4%

0% Thunder
( 2% severe)

SW 5

76%

61°

Partly Cloudy

Chance of Rain

11 AM

83°

84°

Partly Cloudy

WSW 8

51%

63°

2 PM

88°

88°

Partly Cloudy

21%
RAIN
.1–.25 in

0% Thunder
( 18% severe)

WSW 12

40%

61°

5 PM

86°

87°

Partly Cloudy

WSW 12

46%

63°

8 PM

79°

80°

Partly Cloudy

2%

0% Thunder
( 9% severe)

WSW 8

56%

62°

11 PM

74°

74°

Partly Cloudy

SW 8

66%

62°

Wednesday
20 MAY 2026

2 AM

72°

72°

Partly Cloudy

0%

0% Thunder
( 3% severe)

SW 8

68%

61°

Low 70°

5 AM

71°

71°

Partly Cloudy

WSW 9

68%

60°

High 88°

8 AM

75°

75°

Partly Cloudy

10%
RAIN
<.01 in

0% Thunder
( 7% severe)

WSW 9

64%

62°

Partly Cloudy

Chance of Rain

11 AM

83°

84°

Partly Cloudy

WSW 13

51%

63°

2 PM

84°

84°

Partly Cloudy

29%
RAIN
<.01 in

0% Thunder
( 16% severe)

W 15

46%

61°

5 PM

80°

81°

Partly Cloudy

W 14

51%

60°

8 PM

72°

72°

Partly Cloudy

WNW 10

53%

54°


PORTSMOUTH, NH extended weather forecast
Thursday 21 MAY 2026	Friday 22 MAY 2026	Saturday 23 MAY 2026	Sunday 24 MAY 2026	Monday 25 MAY 2026
Low 51°	Low 44°	Low 48°	Low 44°	Low 46°
High 62°	High 68°	High 65°	High 64°	High 66°

Partly Cloudy 7% Rain	Partly Cloudy 7% Rain	Partly Cloudy 10% Rain	Overcast 18% Rain	Mostly Cloudy 30% Rain

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