Weather Forecast for Portland
Maine, United States of America
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Current Weather - Portland: 22°C
Current Weather - Portland: 22°C
Maine, United States of America
Sunny
Feels like 23°C
Wind
8 km/h ESE
Humidity
67%
Pressure
1008 mb
UV Index
6
Visibility
9 km
Sunny
Thursday, August 13, 2026
High
26°C
Low
17°C
Rain Chance
9%
Hourly Forecast
26°C
24°C
21°C
20°C
19°C
19°C
Day Statistics
Maximum Wind
12 km/h
Humidity
72%
Precipitation
0 mm
UV Index
6
Visibility
10 km
Rain Chance
9%
Snow Chance
0%
Sun & Moon
Sunrise
05:43 AM
Sunset
07:48 PM
Moonrise
06:22 AM
Moonset
08:14 PM
Moon Phase
New Moon
Moon Illumination
2%
Air Quality
PM2.5
8.5
μg/m³
PM10
9.3
μg/m³
NO₂
6.5
μg/m³
O₃
70.2
μg/m³
SO₂
0.6
μg/m³
CO
153.1
μg/m³
Sunny
Friday, August 14, 2026
High
25°C
Low
16°C
Rain Chance
4%
Hourly Forecast
18°C
17°C
17°C
16°C
16°C
16°C
16°C
17°C
19°C
21°C
22°C
23°C
24°C
25°C
25°C
25°C
25°C
25°C
24°C
22°C
20°C
19°C
18°C
17°C
Day Statistics
Maximum Wind
27 km/h
Humidity
59%
Precipitation
0 mm
UV Index
6
Visibility
10 km
Rain Chance
4%
Snow Chance
0%
Sun & Moon
Sunrise
05:44 AM
Sunset
07:46 PM
Moonrise
07:44 AM
Moonset
08:37 PM
Moon Phase
Waxing Crescent
Moon Illumination
5%
Air Quality
PM2.5
3.2
μg/m³
PM10
3.3
μg/m³
NO₂
2.3
μg/m³
O₃
66.8
μg/m³
SO₂
0.6
μg/m³
CO
126.6
μg/m³
Sunny
Saturday, August 15, 2026
High
24°C
Low
15°C
Rain Chance
3%
Hourly Forecast
17°C
16°C
16°C
15°C
15°C
15°C
15°C
15°C
17°C
20°C
21°C
22°C
23°C
23°C
24°C
24°C
23°C
23°C
23°C
21°C
20°C
19°C
19°C
18°C
Day Statistics
Maximum Wind
16 km/h
Humidity
56%
Precipitation
0 mm
UV Index
7
Visibility
10 km
Rain Chance
3%
Snow Chance
0%
Sun & Moon
Sunrise
05:45 AM
Sunset
07:45 PM
Moonrise
09:03 AM
Moonset
08:58 PM
Moon Phase
Waxing Crescent
Moon Illumination
11%
Air Quality
PM2.5
2.7
μg/m³
PM10
3
μg/m³
NO₂
3.5
μg/m³
O₃
59
μg/m³
SO₂
0.7
μg/m³
CO
123
μg/m³
Partly Cloudy
Sunday, August 16, 2026
High
23°C
Low
15°C
Rain Chance
75%
Hourly Forecast
17°C
17°C
16°C
16°C
16°C
15°C
15°C
16°C
18°C
20°C
21°C
22°C
22°C
21°C
23°C
22°C
21°C
20°C
19°C
18°C
18°C
17°C
17°C
17°C
Day Statistics
Maximum Wind
22 km/h
Humidity
72%
Precipitation
15 mm
UV Index
6
Visibility
9 km
Rain Chance
75%
Snow Chance
0%
Sun & Moon
Sunrise
05:46 AM
Sunset
07:43 PM
Moonrise
10:19 AM
Moonset
09:21 PM
Moon Phase
Waxing Crescent
Moon Illumination
18%
Air Quality
PM2.5
7.3
μg/m³
PM10
8.4
μg/m³
NO₂
4.1
μg/m³
O₃
77.8
μg/m³
SO₂
0.8
μg/m³
CO
133
μg/m³
Patchy rain nearby
Monday, August 17, 2026
High
23°C
Low
17°C
Rain Chance
76%
Hourly Forecast
17°C
17°C
18°C
19°C
18°C
18°C
18°C
18°C
18°C
18°C
18°C
18°C
19°C
20°C
22°C
23°C
23°C
23°C
22°C
21°C
20°C
19°C
19°C
19°C
Day Statistics
Maximum Wind
21 km/h
Humidity
85%
Precipitation
3 mm
UV Index
6
Visibility
8 km
Rain Chance
76%
Snow Chance
0%
Sun & Moon
Sunrise
05:48 AM
Sunset
07:42 PM
Moonrise
11:34 AM
Moonset
09:45 PM
Moon Phase
Waxing Crescent
Moon Illumination
27%
Air Quality
PM2.5
5
μg/m³
PM10
6.2
μg/m³
NO₂
2.5
μg/m³
O₃
85.7
μg/m³
SO₂
0.5
μg/m³
CO
171
μg/m³
Sunny
Tuesday, August 18, 2026
High
22°C
Low
15°C
Rain Chance
6%
Hourly Forecast
18°C
17°C
16°C
16°C
15°C
15°C
16°C
17°C
17°C
19°C
20°C
22°C
22°C
22°C
22°C
22°C
22°C
22°C
21°C
20°C
19°C
19°C
18°C
18°C
Day Statistics
Maximum Wind
18 km/h
Humidity
69%
Precipitation
0 mm
UV Index
6
Visibility
10 km
Rain Chance
6%
Snow Chance
0%
Sun & Moon
Sunrise
05:49 AM
Sunset
07:40 PM
Moonrise
12:48 PM
Moonset
10:13 PM
Moon Phase
First Quarter
Moon Illumination
37%
Partly Cloudy
Wednesday, August 19, 2026
High
22°C
Low
16°C
Rain Chance
44%
Hourly Forecast
17°C
17°C
17°C
17°C
17°C
16°C
17°C
17°C
18°C
19°C
20°C
21°C
21°C
22°C
22°C
22°C
22°C
22°C
21°C
21°C
20°C
20°C
20°C
19°C
Day Statistics
Maximum Wind
16 km/h
Humidity
83%
Precipitation
1 mm
UV Index
6
Visibility
10 km
Rain Chance
44%
Snow Chance
0%
Sun & Moon
Sunrise
05:50 AM
Sunset
07:39 PM
Moonrise
01:59 PM
Moonset
10:46 PM
Moon Phase
First Quarter
Moon Illumination
48%
Solar Radiation Data
Shortwave Radiation
624.61
Diffuse Radiation
117.34
DNI
0
GTI
0
Weather Alerts
Marine Weather Statement issued August 13 at 7:53AM EDT by NWS Gray ME
A Marine Weather Statement has been issued for the following areas... Coastal Waters from Cape Elizabeth, ME to Merrimack River, MA out 25 NM... Waters from Cape Elizabeth ME to Merrimack River MA from 25 to 60 NM... Waters from Port Clyde ME to Cape Elizabeth ME from 25 to 60 NM... At 752 AM EDT, Doppler radar indicated a strong thunderstorm, capable of producing winds to around 30 knots and small hail. This thunderstorm was located 15 nm northeast of Jeffreys Ledge Buoy 44098, moving east at 40 knots. The strong thunderstorm will remain over mainly open waters.
Mariners can expect gusty winds to around 30 knots, locally higher waves, and lightning strikes. Boaters should seek safe harbor immediately until this storm passes.
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