Weather Forecast for Portsmouth (US)
New Hampshire, United States of America
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Current Weather - Portsmouth (US): 21°C
Current Weather - Portsmouth (US): 21°C
New Hampshire, United States of America
Overcast
Feels like 18°C
Wind
22 km/h ENE
Humidity
68%
Pressure
1010 mb
UV Index
1
Visibility
10 km
Sunny
Saturday, September 05, 2026
High
22°C
Low
15°C
Rain Chance
77%
Hourly Forecast
19°C
18°C
17°C
16°C
16°C
16°C
16°C
Day Statistics
Maximum Wind
26 km/h
Humidity
79%
Precipitation
7 mm
UV Index
3
Visibility
10 km
Rain Chance
77%
Snow Chance
0%
Sun & Moon
Sunrise
06:11 AM
Sunset
07:11 PM
Moonrise
11:57 PM
Moonset
03:32 PM
Moon Phase
Waning Crescent
Moon Illumination
29%
Air Quality
PM2.5
2.3
μg/m³
PM10
2.6
μg/m³
NO₂
1.7
μg/m³
O₃
70.3
μg/m³
SO₂
0.5
μg/m³
CO
133.9
μg/m³
Sunny
Sunday, September 06, 2026
High
20°C
Low
13°C
Rain Chance
37%
Hourly Forecast
16°C
14°C
14°C
13°C
13°C
13°C
13°C
13°C
15°C
17°C
18°C
17°C
18°C
20°C
19°C
18°C
18°C
18°C
18°C
16°C
16°C
15°C
14°C
14°C
Day Statistics
Maximum Wind
19 km/h
Humidity
72%
Precipitation
1 mm
UV Index
6
Visibility
10 km
Rain Chance
37%
Snow Chance
0%
Sun & Moon
Sunrise
06:13 AM
Sunset
07:09 PM
Moonrise
Does not rise today
Moonset
04:27 PM
Moon Phase
Waning Crescent
Moon Illumination
20%
Air Quality
PM2.5
2.6
μg/m³
PM10
3
μg/m³
NO₂
2.3
μg/m³
O₃
61.2
μg/m³
SO₂
0.5
μg/m³
CO
133.3
μg/m³
Sunny
Monday, September 07, 2026
High
23°C
Low
13°C
Rain Chance
4%
Hourly Forecast
14°C
14°C
14°C
13°C
13°C
13°C
13°C
13°C
15°C
18°C
20°C
21°C
21°C
22°C
23°C
23°C
23°C
23°C
22°C
20°C
18°C
18°C
17°C
17°C
Day Statistics
Maximum Wind
13 km/h
Humidity
60%
Precipitation
0 mm
UV Index
6
Visibility
10 km
Rain Chance
4%
Snow Chance
0%
Sun & Moon
Sunrise
06:14 AM
Sunset
07:08 PM
Moonrise
01:11 AM
Moonset
05:11 PM
Moon Phase
Waning Crescent
Moon Illumination
12%
Air Quality
PM2.5
3.2
μg/m³
PM10
3.3
μg/m³
NO₂
2.5
μg/m³
O₃
71.1
μg/m³
SO₂
0.9
μg/m³
CO
159.2
μg/m³
Overcast
Tuesday, September 08, 2026
High
22°C
Low
16°C
Rain Chance
22%
Hourly Forecast
17°C
17°C
18°C
18°C
19°C
19°C
19°C
19°C
18°C
19°C
19°C
22°C
21°C
18°C
18°C
18°C
18°C
17°C
17°C
16°C
16°C
18°C
18°C
16°C
Day Statistics
Maximum Wind
21 km/h
Humidity
71%
Precipitation
0 mm
UV Index
6
Visibility
10 km
Rain Chance
22%
Snow Chance
0%
Sun & Moon
Sunrise
06:15 AM
Sunset
07:06 PM
Moonrise
02:32 AM
Moonset
05:46 PM
Moon Phase
Waning Crescent
Moon Illumination
6%
Air Quality
PM2.5
3.1
μg/m³
PM10
3.2
μg/m³
NO₂
3.4
μg/m³
O₃
70.2
μg/m³
SO₂
0.7
μg/m³
CO
152.2
μg/m³
Overcast
Wednesday, September 09, 2026
High
23°C
Low
15°C
Rain Chance
33%
Hourly Forecast
17°C
17°C
15°C
17°C
17°C
15°C
17°C
18°C
16°C
18°C
19°C
18°C
22°C
22°C
22°C
22°C
21°C
23°C
23°C
22°C
23°C
23°C
22°C
22°C
Day Statistics
Maximum Wind
28 km/h
Humidity
76%
Precipitation
0 mm
UV Index
5
Visibility
10 km
Rain Chance
33%
Snow Chance
0%
Sun & Moon
Sunrise
06:16 AM
Sunset
07:04 PM
Moonrise
03:55 AM
Moonset
06:14 PM
Moon Phase
New Moon
Moon Illumination
2%
Air Quality
PM2.5
5.2
μg/m³
PM10
5.3
μg/m³
NO₂
7.6
μg/m³
O₃
46.8
μg/m³
SO₂
0.6
μg/m³
CO
231.2
μg/m³
Overcast
Thursday, September 10, 2026
High
24°C
Low
15°C
Rain Chance
71%
Hourly Forecast
22°C
22°C
20°C
20°C
20°C
20°C
20°C
21°C
21°C
22°C
22°C
22°C
23°C
23°C
24°C
23°C
23°C
22°C
21°C
20°C
18°C
17°C
16°C
15°C
Day Statistics
Maximum Wind
31 km/h
Humidity
66%
Precipitation
4 mm
UV Index
5
Visibility
10 km
Rain Chance
71%
Snow Chance
0%
Sun & Moon
Sunrise
06:17 AM
Sunset
07:02 PM
Moonrise
05:17 AM
Moonset
06:39 PM
Moon Phase
New Moon
Moon Illumination
0%
Sunny
Friday, September 11, 2026
High
19°C
Low
8°C
Rain Chance
2%
Hourly Forecast
14°C
13°C
12°C
11°C
10°C
8°C
9°C
9°C
9°C
11°C
13°C
15°C
17°C
18°C
19°C
19°C
19°C
19°C
17°C
16°C
14°C
15°C
15°C
15°C
Day Statistics
Maximum Wind
26 km/h
Humidity
50%
Precipitation
0 mm
UV Index
5
Visibility
10 km
Rain Chance
2%
Snow Chance
0%
Sun & Moon
Sunrise
06:18 AM
Sunset
07:00 PM
Moonrise
06:36 AM
Moonset
07:02 PM
Moon Phase
New Moon
Moon Illumination
0%
Solar Radiation Data
Shortwave Radiation
373.39
Diffuse Radiation
142.8
DNI
0
GTI
0
Weather Alerts
Rip Current Statement issued September 5 at 2:15AM EDT until September 6 at 8:00PM EDT by NWS Boston/Norton MA
* WHAT...Dangerous rip currents expected. * WHERE...Eastern Essex MA, Southeast Middlesex MA, Suffolk MA, Eastern Norfolk MA, Eastern Plymouth MA, Barnstable MA, Dukes MA and Nantucket MA Counties. * WHEN...From late tonight through Sunday evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water.
Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.
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