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Weather data for Portland is updated regularly with the latest available observations and forecasts.

Now · 11:44 AM

Portland Weather & Hourly Forecast

United States · Maine · 04103

58°F

Sunny

Feels like: 51°F

💧 Humidity 67% 🌡 Pressure 30.59 inHg 💨 Wind 12 mph 👁 Visibility 29.4 mi ☁ Clouds 9% ☀️ UV index 3.7 · Moderate 🌅 Sunrise 6:27 AM 🌇 Sunset 6:38 PM

Hourly Forecast for Portland

Today

12:00 PM

Sunny

58° 💧 None 💨 12 mph H 67%30.59 inHg

3:00 PM

Sunny

57° 💧 None 💨 10 mph H 73%30.53 inHg

6:00 PM

Sunny

56° 💧 None 💨 6 mph H 79%30.53 inHg

9:00 PM

Clear night

54° 💧 None 💨 6 mph H 83%30.53 inHg

Tomorrow

12:00 AM

Clear night

53° 💧 None 💨 6 mph H 86%30.50 inHg

3:00 AM

Clear night

51° 💧 None 💨 7 mph H 89%30.47 inHg

6:00 AM

Clear night

51° 💧 None 💨 10 mph H 84%30.47 inHg

9:00 AM

Sunny

54° 💧 None 💨 11 mph H 76%30.47 inHg

12:00 PM

Sunny

60° 💧 None 💨 8 mph H 59%30.45 inHg

3:00 PM

Sunny

59° 💧 None 💨 7 mph H 69%30.39 inHg

6:00 PM

Sunny

57° 💧 None 💨 4 mph H 77%30.33 inHg

9:00 PM

Overcast night

55° 💧 None 💨 3 mph H 76%30.33 inHg

Friday

12:00 AM

Overcast night

54° 💧 None 💨 6 mph H 88%30.27 inHg

3:00 AM

Mostly cloudy night

54° 💧 None 💨 9 mph H 88%30.24 inHg

6:00 AM

Overcast night

54° 💧 None 💨 11 mph H 89%30.21 inHg

9:00 AM

Mostly cloudy

58° 💧 None 💨 12 mph H 75%30.24 inHg

Today

12:00 PM

Sunny

58° 💧 None 💨 12 mph H 67%30.59 inHg

1:00 PM

Sunny

57° 💧 None 💨 12 mph H 74%30.56 inHg

2:00 PM

Sunny

57° 💧 None 💨 12 mph H 73%30.56 inHg

3:00 PM

Sunny

57° 💧 None 💨 10 mph H 73%30.53 inHg

4:00 PM

Sunny

57° 💧 None 💨 8 mph H 75%30.53 inHg

5:00 PM

Sunny

57° 💧 None 💨 7 mph H 77%30.53 inHg

6:00 PM

Sunny

56° 💧 None 💨 6 mph H 79%30.53 inHg

7:00 PM

Clear night

55° 💧 None 💨 6 mph H 83%30.53 inHg

8:00 PM

Clear night

54° 💧 None 💨 6 mph H 84%30.53 inHg

9:00 PM

Clear night

54° 💧 None 💨 6 mph H 83%30.53 inHg

10:00 PM

Clear night

54° 💧 None 💨 6 mph H 83%30.53 inHg

11:00 PM

Clear night

53° 💧 None 💨 5 mph H 84%30.53 inHg

Tomorrow

12:00 AM

Clear night

53° 💧 None 💨 6 mph H 86%30.50 inHg

1:00 AM

Clear night

52° 💧 None 💨 7 mph H 90%30.50 inHg

2:00 AM

Clear night

51° 💧 None 💨 7 mph H 90%30.47 inHg

3:00 AM

Clear night

51° 💧 None 💨 7 mph H 89%30.47 inHg

4:00 AM

Clear night

51° 💧 None 💨 8 mph H 88%30.47 inHg

5:00 AM

Clear night

51° 💧 None 💨 9 mph H 86%30.47 inHg

6:00 AM

Clear night

51° 💧 None 💨 10 mph H 84%30.47 inHg

7:00 AM

Sunny

51° 💧 None 💨 11 mph H 84%30.47 inHg

8:00 AM

Sunny

52° 💧 None 💨 11 mph H 82%30.47 inHg

9:00 AM

Sunny

54° 💧 None 💨 11 mph H 76%30.47 inHg

10:00 AM

Sunny

57° 💧 None 💨 10 mph H 69%30.47 inHg

11:00 AM

Sunny

59° 💧 None 💨 10 mph H 62%30.45 inHg

12:00 PM

Sunny

60° 💧 None 💨 8 mph H 59%30.45 inHg

1:00 PM

Sunny

61° 💧 None 💨 5 mph H 62%30.42 inHg

2:00 PM

Sunny

60° 💧 None 💨 7 mph H 68%30.39 inHg

3:00 PM

Sunny

59° 💧 None 💨 7 mph H 69%30.39 inHg

4:00 PM

Sunny

59° 💧 None 💨 6 mph H 69%30.36 inHg

5:00 PM

Sunny

59° 💧 None 💨 5 mph H 72%30.33 inHg

6:00 PM

Sunny

57° 💧 None 💨 4 mph H 77%30.33 inHg

7:00 PM

Mostly cloudy night

55° 💧 None 💨 3 mph H 81%30.33 inHg

8:00 PM

Overcast night

55° 💧 None 💨 3 mph H 78%30.33 inHg

9:00 PM

Overcast night

55° 💧 None 💨 3 mph H 76%30.33 inHg

10:00 PM

Overcast night

56° 💧 None 💨 4 mph H 75%30.30 inHg

11:00 PM

Overcast night

55° 💧 None 💨 5 mph H 80%30.27 inHg

Friday

12:00 AM

Overcast night

54° 💧 None 💨 6 mph H 88%30.27 inHg

1:00 AM

Overcast night

54° 💧 None 💨 7 mph H 89%30.24 inHg

2:00 AM

Mostly cloudy night

54° 💧 None 💨 7 mph H 87%30.24 inHg

3:00 AM

Mostly cloudy night

54° 💧 None 💨 9 mph H 88%30.24 inHg

4:00 AM

Partly cloudy night

54° 💧 None 💨 10 mph H 88%30.24 inHg

5:00 AM

Mostly cloudy night

54° 💧 None 💨 11 mph H 89%30.21 inHg

6:00 AM

Overcast night

54° 💧 None 💨 11 mph H 89%30.21 inHg

7:00 AM

Mostly cloudy

54° 💧 None 💨 12 mph H 87%30.21 inHg

8:00 AM

Partly cloudy

56° 💧 None 💨 12 mph H 82%30.24 inHg

9:00 AM

Mostly cloudy

58° 💧 None 💨 12 mph H 75%30.24 inHg

10:00 AM

Overcast

61° 💧 None 💨 14 mph H 66%30.24 inHg

11:00 AM

Overcast

64° 💧 None 💨 13 mph H 61%30.21 inHg

12:00 PM

Overcast

66° 💧 None 💨 12 mph H 57%30.21 inHg

1:00 PM

Overcast

67° 💧 None 💨 9 mph H 56%30.21 inHg

2:00 PM

Overcast

66° 💧 None 💨 7 mph H 65%30.18 inHg

3:00 PM

Overcast

64° 💧 None 💨 6 mph H 75%30.15 inHg

4:00 PM

Overcast

64° 💧 None 💨 4 mph H 76%30.15 inHg

5:00 PM

Overcast

63° 💧 None 💨 2 mph H 79%30.15 inHg

6:00 PM

Overcast

62° 💧 None 💨 1 mph H 84%30.15 inHg

7:00 PM

Overcast night

61° 💧 None 💨 4 mph H 74%30.15 inHg

8:00 PM

Overcast night

63° 💧 None 💨 9 mph H 63%30.15 inHg

Saturday

5:00 AM

Overcast night

59° 💧 None 💨 14 mph H 58%30.03 inHg

8:00 AM

Overcast

58° 💧 None 💨 15 mph H 59%30.03 inHg

11:00 AM

Light rain

57° 💧 None 💨 14 mph H 71%30.00 inHg

2:00 PM

Light rain

56° 💧 None 💨 17 mph H 83%29.91 inHg

5:00 PM

Light rain

58° 💧 None 💨 18 mph H 78%29.85 inHg

8:00 PM

Moderate rain

57° 💧 None 💨 18 mph H 77%29.85 inHg

11:00 PM

Moderate rain

54° 💧 None 💨 16 mph H 92%29.85 inHg

Sunday

2:00 AM

Light rain

53° 💧 None 💨 19 mph H 93%29.83 inHg

5:00 AM

Heavy rain

53° 💧 None 💨 15 mph H 94%29.83 inHg

8:00 AM

Light rain

53° 💧 None 💨 18 mph H 94%29.85 inHg

11:00 AM

Light rain

54° 💧 None 💨 18 mph H 92%29.85 inHg

2:00 PM

Light rain

56° 💧 None 💨 16 mph H 93%29.88 inHg

5:00 PM

Light rain

56° 💧 None 💨 16 mph H 94%29.88 inHg

8:00 PM

Moderate rain

56° 💧 None 💨 17 mph H 96%29.88 inHg

11:00 PM

Light rain

55° 💧 None 💨 17 mph H 96%29.88 inHg

Monday

2:00 AM

Moderate rain

55° 💧 None 💨 17 mph H 96%29.85 inHg

5:00 AM

Light rain

55° 💧 None 💨 18 mph H 96%29.83 inHg

8:00 AM

Heavy rain

55° 💧 None 💨 19 mph H 97%29.83 inHg

11:00 AM

Moderate rain

56° 💧 None 💨 16 mph H 98%29.80 inHg

2:00 PM

Overcast

58° 💧 None 💨 15 mph H 97%29.80 inHg

5:00 PM

Light rain

59° 💧 None 💨 11 mph H 99%29.77 inHg

8:00 PM

Light rain

59° 💧 None 💨 8 mph H 99%29.80 inHg

11:00 PM

Overcast night

58° 💧 None 💨 8 mph H 97%29.80 inHg

Tuesday

2:00 AM

Light rain

58° 💧 None 💨 8 mph H 97%29.80 inHg

8:00 AM

Overcast

57° 💧 None 💨 7 mph H 90%29.83 inHg

2:00 PM

Mostly sunny

57° 💧 None 💨 9 mph H 83%29.88 inHg

8:00 PM

Overcast night

67° 💧 None 💨 7 mph H 64%29.91 inHg

Wednesday

2:00 AM

Mostly clear night

59° 💧 None 💨 2 mph H 83%29.97 inHg

8:00 AM

Sunny

53° 💧 None 💨 4 mph H 91%30.03 inHg

2:00 PM

Sunny

55° 💧 None 💨 3 mph H 87%30.06 inHg

8:00 PM

Mostly clear night

64° 💧 None 💨 7 mph H 79%30.06 inHg

Thursday

2:00 AM

Clear night

57° 💧 None 💨 6 mph H 90%30.06 inHg

8:00 AM

Sunny

57° 💧 None 💨 8 mph H 96%30.06 inHg

2:00 PM

Mostly sunny

58° 💧 None 💨 8 mph H 94%30.06 inHg

8:00 PM

Partly cloudy night

69° 💧 None 💨 11 mph H 82%30.00 inHg

Friday

2:00 AM

Mostly cloudy night

63° 💧 None 💨 12 mph H 86%29.97 inHg

8:00 AM

Mostly sunny

60° 💧 None 💨 9 mph H 96%29.97 inHg

2:00 PM

Overcast

62° 💧 None 💨 11 mph H 91%29.91 inHg

8:00 PM

Very heavy rain

62° 💧 None 💨 13 mph H 95%29.85 inHg

Saturday

2:00 AM

Moderate rain

63° 💧 None 💨 15 mph H 98%29.77 inHg

8:00 AM

Partly cloudy

61° 💧 None 💨 11 mph H 95%29.74 inHg

2:00 PM

Sunny

58° 💧 None 💨 7 mph H 90%29.83 inHg

8:00 PM

Clear night

67° 💧 None 💨 7 mph H 47%29.85 inHg

Sunday

2:00 AM

Clear night

58° 💧 None 💨 7 mph H 59%29.97 inHg

8:00 AM

Sunny

49° 💧 None 💨 5 mph H 73%30.09 inHg

2:00 PM

Sunny

50° 💧 None 💨 6 mph H 75%30.21 inHg

8:00 PM

Mostly clear night

59° 💧 None 💨 4 mph H 50%30.18 inHg

Monday

2:00 AM

Clear night

50° 💧 None 💨 6 mph H 82%30.18 inHg

8:00 AM

Mostly sunny

45° 💧 None 💨 4 mph H 95%30.18 inHg

2:00 PM

Mostly cloudy

48° 💧 None 💨 4 mph H 78%30.21 inHg

8:00 PM

Mostly cloudy night

60° 💧 None 💨 3 mph H 48%30.15 inHg

Tuesday

2:00 AM

Mostly clear night

52° 💧 None 💨 6 mph H 84%30.12 inHg

8:00 AM

Mostly cloudy

49° 💧 None 💨 5 mph H 85%30.09 inHg

2:00 PM

Sunny

51° 💧 None 💨 7 mph H 81%30.06 inHg

8:00 PM

Mostly clear night

63° 💧 None 💨 11 mph H 70%29.94 inHg

Wednesday

2:00 AM

Clear night

59° 💧 None 💨 13 mph H 82%29.83 inHg

8:00 AM

Sunny

57° 💧 None 💨 13 mph H 88%29.71 inHg

2:00 PM

Moderate rain

58° 💧 None 💨 9 mph H 93%29.62 inHg

8:00 PM

Clear night

67° 💧 None 💨 12 mph H 34%29.56 inHg

Thursday

2:00 AM

Clear night

57° 💧 None 💨 7 mph H 59%29.59 inHg

In Portland and, more broadly, across the state of Maine: This morning, the sky features a mix of sun and clouds with cool temperatures ranging from 45 to 63 degrees Fahrenheit. Light north winds are expected, with speeds up to 8 mph and gusts reaching 19 mph. As the day progresses, conditions will remain generally dry, with no precipitation in the forecast. Temperatures will stay within the cool range, and the wind will continue to be light, contributing to a calm and mild afternoon. Overall, it should be a pleasant day with comfortable conditions, especially in the late morning and early afternoon hours. Be sure to dress accordingly for the cool temperatures and light breezes.

15-Day Weather Outlook for Portland

TomorrowTomorrow

Mostly cloudy 61°/51° 💧 None 💨 11 mph

Friday, Sep 25Fri Sep 25

Overcast 67°/54° 💧 None 💨 14 mph

Saturday, Sep 26Sat Sep 26

Moderate rain 59°/54° 💧 1.057 in 💨 18 mph

Sunday, Sep 27Sun Sep 27

Heavy rain 56°/53° 💧 1.766 in 💨 19 mph

Monday, Sep 28Mon Sep 28

Heavy rain 59°/55° 💧 1.502 in 💨 19 mph

Tuesday, Sep 29Tue Sep 29

Light rain 67°/57° 💧 0.010 in 💨 9 mph

Wednesday, Sep 30Wed Sep 30

Mostly sunny 64°/53° 💧 None 💨 7 mph

Thursday, Oct 1Thu Oct 1

Mostly sunny 69°/57° 💧 None 💨 11 mph

Friday, Oct 2Fri Oct 2

Very heavy rain 63°/60° 💧 0.317 in 💨 13 mph

Saturday, Oct 3Sat Oct 3

Moderate rain 67°/58° 💧 0.974 in 💨 15 mph

Sunday, Oct 4Sun Oct 4

Mostly sunny 59°/49° 💧 None 💨 7 mph

Monday, Oct 5Mon Oct 5

Mostly sunny 60°/45° 💧 None 💨 6 mph

Tuesday, Oct 6Tue Oct 6

Mostly sunny 63°/49° 💧 None 💨 11 mph

Wednesday, Oct 7Wed Oct 7

Moderate rain 67°/57° 💧 0.383 in 💨 13 mph

Thursday, Oct 8Thu Oct 8

Sunny 57°/57° 💧 None 💨 7 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Portland

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Portland

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 12:00 PM

PM2.5 Fine particles Good 0,8µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 1,6µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Fair 62,7µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 1,0µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in Portland

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 4,6Moderate 🙂Fair

Tomorrow UV 4,7Moderate 🙂Fair

Friday UV 2,5Low 🙂Fair

Saturday UV 0,4Low 🙂Fair

Sunday UV 3,0Moderate 🙂Fair

Monday UV 3,0Moderate —Unavailable

Tuesday UV 4,0Moderate —Unavailable

Hourly UV index today

12:00 PMUV 4,5 1:00 PMUV 4,6 2:00 PMUV 4,0 3:00 PMUV 2,8 4:00 PMUV 1,6 5:00 PMUV 0,6 6:00 PMUV 0,1 7:00 PMUV 0,0

Today's weather health advice Open today's recommendations.

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Portland

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · PORTLAND, MAINE

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 5:00 AM–6:00 AM.

100/100Best-hour score

BEST TIME TONIGHT 5:00 AM–6:00 AM Astronomical darkness: 8:12 PM–4:54 AM

☁ Cloud cover 0% Real hourly forecast for the best viewing hour.

☾ Moonlight 94% Waxing Gibbous · Moon below the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant 58° high at the best hour.

✦ Estimated visible meteors 1–4/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min71%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

ACTIVE NOW

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

NOV 6–NOV 30

LeonidsStart NOV 6 · Peak NOV 17 · End NOV 30 · ZHR 15 · 52% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

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Forecast data for Portland were last refreshed today at 11:34 AM. The current forecast period extends through 25/09/2026 at 9:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.