Weather Forecast for Portland
Maine, United States of America
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Current Weather - Portland: 11°C
Current Weather - Portland: 11°C
Maine, United States of America
Clear
Feels like 8°C
Wind
15 km/h NNE
Humidity
82%
Pressure
1034 mb
UV Index
0
Visibility
10 km
Sunny
Thursday, September 24, 2026
High
14°C
Low
10°C
Rain Chance
7%
Hourly Forecast
12°C
13°C
13°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
13°C
13°C
Day Statistics
Maximum Wind
20 km/h
Humidity
69%
Precipitation
0 mm
UV Index
5
Visibility
10 km
Rain Chance
7%
Snow Chance
0%
Sun & Moon
Sunrise
06:30 AM
Sunset
06:35 PM
Moonrise
05:42 PM
Moonset
04:22 AM
Moon Phase
Full Moon
Moon Illumination
99%
Air Quality
PM2.5
4.9
μg/m³
PM10
5.5
μg/m³
NO₂
8.8
μg/m³
O₃
54.2
μg/m³
SO₂
1.1
μg/m³
CO
149.6
μg/m³
Overcast
Friday, September 25, 2026
High
17°C
Low
12°C
Rain Chance
46%
Hourly Forecast
13°C
12°C
12°C
12°C
12°C
12°C
12°C
12°C
13°C
13°C
14°C
15°C
16°C
16°C
16°C
17°C
17°C
17°C
17°C
17°C
17°C
16°C
17°C
15°C
Day Statistics
Maximum Wind
32 km/h
Humidity
69%
Precipitation
0 mm
UV Index
3
Visibility
10 km
Rain Chance
46%
Snow Chance
0%
Sun & Moon
Sunrise
06:31 AM
Sunset
06:33 PM
Moonrise
06:00 PM
Moonset
05:26 AM
Moon Phase
Full Moon
Moon Illumination
100%
Air Quality
PM2.5
3.7
μg/m³
PM10
3.9
μg/m³
NO₂
5.4
μg/m³
O₃
63.6
μg/m³
SO₂
1.3
μg/m³
CO
151.4
μg/m³
Light rain
Saturday, September 26, 2026
High
14°C
Low
12°C
Rain Chance
91%
Hourly Forecast
14°C
14°C
14°C
13°C
13°C
13°C
12°C
13°C
13°C
13°C
13°C
13°C
13°C
13°C
13°C
12°C
13°C
12°C
13°C
13°C
12°C
13°C
13°C
13°C
Day Statistics
Maximum Wind
49 km/h
Humidity
87%
Precipitation
35 mm
UV Index
0
Visibility
7 km
Rain Chance
91%
Snow Chance
0%
Sun & Moon
Sunrise
06:32 AM
Sunset
06:31 PM
Moonrise
06:18 PM
Moonset
06:30 AM
Moon Phase
Full Moon
Moon Illumination
99%
Air Quality
PM2.5
1.9
μg/m³
PM10
2.2
μg/m³
NO₂
2.4
μg/m³
O₃
65.4
μg/m³
SO₂
0.8
μg/m³
CO
124.3
μg/m³
Light rain shower
Sunday, September 27, 2026
High
14°C
Low
13°C
Rain Chance
93%
Hourly Forecast
13°C
13°C
13°C
13°C
13°C
13°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
13°C
13°C
Day Statistics
Maximum Wind
53 km/h
Humidity
93%
Precipitation
22 mm
UV Index
1
Visibility
10 km
Rain Chance
93%
Snow Chance
0%
Sun & Moon
Sunrise
06:34 AM
Sunset
06:29 PM
Moonrise
06:37 PM
Moonset
07:36 AM
Moon Phase
Waning Gibbous
Moon Illumination
96%
Air Quality
PM2.5
1.3
μg/m³
PM10
1.6
μg/m³
NO₂
1.5
μg/m³
O₃
74.3
μg/m³
SO₂
0.3
μg/m³
CO
118.6
μg/m³
Patchy rain nearby
Monday, September 28, 2026
High
14°C
Low
11°C
Rain Chance
92%
Hourly Forecast
13°C
12°C
13°C
12°C
12°C
13°C
11°C
11°C
13°C
11°C
12°C
13°C
12°C
12°C
13°C
13°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
Day Statistics
Maximum Wind
43 km/h
Humidity
92%
Precipitation
21 mm
UV Index
3
Visibility
10 km
Rain Chance
92%
Snow Chance
0%
Sun & Moon
Sunrise
06:35 AM
Sunset
06:28 PM
Moonrise
07:00 PM
Moonset
08:44 AM
Moon Phase
Waning Gibbous
Moon Illumination
91%
Air Quality
PM2.5
1.5
μg/m³
PM10
2.3
μg/m³
NO₂
2
μg/m³
O₃
66.3
μg/m³
SO₂
0.3
μg/m³
CO
154.2
μg/m³
Patchy rain nearby
Tuesday, September 29, 2026
High
17°C
Low
14°C
Rain Chance
22%
Hourly Forecast
14°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
15°C
16°C
16°C
17°C
17°C
17°C
17°C
17°C
16°C
16°C
16°C
15°C
15°C
15°C
15°C
Day Statistics
Maximum Wind
17 km/h
Humidity
82%
Precipitation
0 mm
UV Index
5
Visibility
10 km
Rain Chance
22%
Snow Chance
0%
Sun & Moon
Sunrise
06:36 AM
Sunset
06:26 PM
Moonrise
07:27 PM
Moonset
09:55 AM
Moon Phase
Waning Gibbous
Moon Illumination
84%
Partly Cloudy
Wednesday, September 30, 2026
High
18°C
Low
14°C
Rain Chance
17%
Hourly Forecast
15°C
15°C
14°C
14°C
14°C
14°C
14°C
14°C
14°C
15°C
16°C
17°C
17°C
17°C
17°C
17°C
17°C
18°C
17°C
17°C
17°C
17°C
17°C
17°C
Day Statistics
Maximum Wind
20 km/h
Humidity
85%
Precipitation
0 mm
UV Index
5
Visibility
10 km
Rain Chance
17%
Snow Chance
0%
Sun & Moon
Sunrise
06:37 AM
Sunset
06:24 PM
Moonrise
08:02 PM
Moonset
11:08 AM
Moon Phase
Waning Gibbous
Moon Illumination
75%
Weather Alerts
Small Craft Advisory issued September 23 at 7:10PM EDT until September 25 at 8:00AM EDT by NWS Gray ME
* WHAT...Northeast winds 5 to 15 kt with gusts up to 25 kt and seas 2 to 5 ft expected. * WHERE...Casco Bay. * WHEN...From 8 PM Thursday to 8 AM EDT Friday. * IMPACTS...Conditions will be hazardous to small craft.
Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Small Craft Advisory issued September 23 at 2:34PM EDT until September 25 at 8:00AM EDT by NWS Gray ME
* WHAT...Northeast winds 5 to 15 kt with gusts up to 25 kt and seas 2 to 5 ft expected. * WHERE...Casco Bay. * WHEN...From 8 PM Thursday to 8 AM EDT Friday. * IMPACTS...Conditions will be hazardous to small craft.
Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
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