Weather Forecast for Portsmouth (US)
New Hampshire, United States of America
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Current Weather - Portsmouth (US): 30°C
Current Weather - Portsmouth (US): 30°C
New Hampshire, United States of America
Sunny
Feels like 31°C
Wind
9 km/h NW
Humidity
33%
Pressure
1008 mb
UV Index
9
Visibility
16 km
Sunny
Saturday, June 13, 2026
High
32°C
Low
18°C
Rain Chance
3%
Hourly Forecast
27°C
25°C
24°C
23°C
21°C
Day Statistics
Maximum Wind
11 km/h
Humidity
61%
Precipitation
0 mm
UV Index
9
Visibility
9 km
Rain Chance
3%
Snow Chance
0%
Sun & Moon
Sunrise
05:03 AM
Sunset
08:23 PM
Moonrise
03:01 AM
Moonset
07:01 PM
Moon Phase
New Moon
Moon Illumination
1%
Air Quality
PM2.5
3.9
μg/m³
PM10
4.4
μg/m³
NO₂
2.2
μg/m³
O₃
82.4
μg/m³
SO₂
0.4
μg/m³
CO
134.9
μg/m³
Sunny
Sunday, June 14, 2026
High
29°C
Low
17°C
Rain Chance
6%
Hourly Forecast
20°C
19°C
18°C
18°C
17°C
17°C
18°C
20°C
21°C
23°C
25°C
26°C
27°C
28°C
29°C
29°C
28°C
27°C
26°C
25°C
24°C
23°C
22°C
21°C
Day Statistics
Maximum Wind
21 km/h
Humidity
58%
Precipitation
0 mm
UV Index
9
Visibility
10 km
Rain Chance
6%
Snow Chance
0%
Sun & Moon
Sunrise
05:03 AM
Sunset
08:23 PM
Moonrise
03:45 AM
Moonset
08:16 PM
Moon Phase
New Moon
Moon Illumination
0%
Air Quality
PM2.5
7.3
μg/m³
PM10
8.1
μg/m³
NO₂
2.6
μg/m³
O₃
99.2
μg/m³
SO₂
0.6
μg/m³
CO
133.4
μg/m³
Moderate rain
Monday, June 15, 2026
High
24°C
Low
15°C
Rain Chance
62%
Hourly Forecast
21°C
20°C
19°C
18°C
18°C
18°C
18°C
18°C
20°C
21°C
22°C
23°C
23°C
24°C
24°C
24°C
23°C
23°C
21°C
20°C
18°C
17°C
16°C
15°C
Day Statistics
Maximum Wind
22 km/h
Humidity
64%
Precipitation
5 mm
UV Index
8
Visibility
8 km
Rain Chance
62%
Snow Chance
0%
Sun & Moon
Sunrise
05:03 AM
Sunset
08:24 PM
Moonrise
04:43 AM
Moonset
09:21 PM
Moon Phase
New Moon
Moon Illumination
2%
Air Quality
PM2.5
2.6
μg/m³
PM10
2.9
μg/m³
NO₂
1.8
μg/m³
O₃
86.3
μg/m³
SO₂
0.3
μg/m³
CO
118.1
μg/m³
Sunny
Tuesday, June 16, 2026
High
24°C
Low
13°C
Rain Chance
4%
Hourly Forecast
14°C
14°C
13°C
13°C
13°C
13°C
14°C
16°C
18°C
20°C
21°C
23°C
23°C
23°C
23°C
24°C
23°C
21°C
21°C
20°C
20°C
19°C
18°C
16°C
Day Statistics
Maximum Wind
18 km/h
Humidity
56%
Precipitation
0 mm
UV Index
8
Visibility
10 km
Rain Chance
4%
Snow Chance
0%
Sun & Moon
Sunrise
05:03 AM
Sunset
08:24 PM
Moonrise
05:54 AM
Moonset
10:14 PM
Moon Phase
Waxing Crescent
Moon Illumination
6%
Air Quality
PM2.5
4.2
μg/m³
PM10
4.8
μg/m³
NO₂
2.8
μg/m³
O₃
71.2
μg/m³
SO₂
0.4
μg/m³
CO
125.4
μg/m³
Patchy rain nearby
Wednesday, June 17, 2026
High
24°C
Low
13°C
Rain Chance
36%
Hourly Forecast
15°C
15°C
14°C
13°C
13°C
13°C
14°C
16°C
18°C
20°C
21°C
23°C
23°C
23°C
23°C
23°C
22°C
22°C
21°C
21°C
20°C
19°C
18°C
17°C
Day Statistics
Maximum Wind
26 km/h
Humidity
72%
Precipitation
1 mm
UV Index
2
Visibility
10 km
Rain Chance
36%
Snow Chance
0%
Sun & Moon
Sunrise
05:03 AM
Sunset
08:24 PM
Moonrise
07:15 AM
Moonset
10:54 PM
Moon Phase
Waxing Crescent
Moon Illumination
11%
Air Quality
PM2.5
4.7
μg/m³
PM10
5.1
μg/m³
NO₂
4.6
μg/m³
O₃
64.7
μg/m³
SO₂
0.6
μg/m³
CO
162
μg/m³
Patchy rain nearby
Thursday, June 18, 2026
High
21°C
Low
17°C
Rain Chance
65%
Hourly Forecast
17°C
17°C
17°C
17°C
17°C
17°C
17°C
17°C
17°C
18°C
18°C
19°C
19°C
20°C
20°C
20°C
21°C
21°C
22°C
22°C
22°C
22°C
22°C
21°C
Day Statistics
Maximum Wind
23 km/h
Humidity
90%
Precipitation
1 mm
UV Index
4
Visibility
8 km
Rain Chance
65%
Snow Chance
0%
Sun & Moon
Sunrise
05:03 AM
Sunset
08:25 PM
Moonrise
08:38 AM
Moonset
11:25 PM
Moon Phase
Waxing Crescent
Moon Illumination
19%
Patchy rain nearby
Friday, June 19, 2026
High
25°C
Low
16°C
Rain Chance
36%
Hourly Forecast
20°C
19°C
18°C
17°C
17°C
17°C
17°C
18°C
18°C
20°C
21°C
22°C
23°C
24°C
24°C
24°C
23°C
23°C
22°C
20°C
19°C
19°C
18°C
17°C
Day Statistics
Maximum Wind
18 km/h
Humidity
73%
Precipitation
0 mm
UV Index
4
Visibility
10 km
Rain Chance
36%
Snow Chance
0%
Sun & Moon
Sunrise
05:03 AM
Sunset
08:25 PM
Moonrise
09:58 AM
Moonset
11:51 PM
Moon Phase
Waxing Crescent
Moon Illumination
28%
Solar Radiation Data
Shortwave Radiation
801.28
Diffuse Radiation
73
DNI
1100
GTI
555.85
Weather Alerts
Beach Hazards Statement issued June 13 at 2:50AM EDT until June 13 at 8:00PM EDT by NWS Gray ME
* WHAT...Warm air temperatures in the 80s to low 90s may cause people to underestimate the dangers of the cold water temperatures in the upper 50s to around 60. * WHERE...In Maine, Coastal York, Coastal Cumberland, Sagadahoc, Lincoln, Knox and Coastal Waldo Counties. In New Hampshire, Coastal Rockingham County. * WHEN...From 8 AM EDT this morning through this evening. * IMPACTS...The cold water temperatures can quickly cause hypothermia to anyone immersed in the water. When the water temperature is below 60 degrees, the average submerged person could lose dexterity within minutes and be unable to accomplish simple tasks. Anyone on boats or paddlecraft should use extreme caution to avoid this threat.
A Beach Hazards Statement is issued on days when a significant number of boats and paddlecraft are expected to be out on the water and when warm air temperatures may cause people to underestimate the danger of the cold water. Paddle smart from the start. Always wear your life jacket. Be aware of wind conditions, tides, and localized currents. All boaters and paddlers are highly encouraged to contact the U.S. Coast Guard Auxiliary or U.S. Power Squadrons at https://cgaux.org/vsc/ to receive a FREE vessel check. This is a convenient, no consequence way to ensure your vessel is outfitted with all required safety equipment. Additionally, please label your paddlecraft with your contact information (IF FOUND Sticker) in the event it is found adrift on the water.
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