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Current weather in South Portland is overcast clouds.

Where can I find the hourly weather forecast for South Portland?

This page shows hourly weather forecast for South Portland, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for South Portland updated regularly?

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

Now · 10:29 AM

South Portland Weather & Hourly Forecast

United States · Maine · 04106

73°F

Overcast

Feels like: 74°F

💧 Humidity 86% 🌡 Pressure 29.97 inHg 💨 Wind 6 mph 👁 Visibility 6.2 mi ☁ Clouds 100% ☀️ UV index 6.0 · High 🌅 Sunrise 6:00 AM 🌇 Sunset 7:24 PM

Hourly Forecast for South Portland

Today

11:00 AM

Overcast

73° 💧 0.01 in 💨 6 mph H 86%29.97 inHg

2:00 PM

Light rain

77° 💧 0.06 in 💨 8 mph H 73%29.94 inHg

5:00 PM

Moderate rain

71° 💧 0.09 in 💨 9 mph H 88%29.94 inHg

8:00 PM

Light rain

67° 💧 0.01 in 💨 5 mph H 91%29.97 inHg

11:00 PM

Mostly clear night

63° 💧 None 💨 10 mph H 82%30.03 inHg

Tomorrow

2:00 AM

Partly cloudy night

61° 💧 None 💨 8 mph H 68%30.09 inHg

5:00 AM

Clear night

56° 💧 None 💨 7 mph H 76%30.12 inHg

8:00 AM

Sunny

60° 💧 None 💨 7 mph H 62%30.18 inHg

11:00 AM

Sunny

70° 💧 None 💨 4 mph H 39%30.18 inHg

2:00 PM

Sunny

76° 💧 None 💨 6 mph H 37%30.15 inHg

5:00 PM

Sunny

70° 💧 None 💨 10 mph H 46%30.12 inHg

8:00 PM

Clear night

64° 💧 None 💨 8 mph H 68%30.12 inHg

11:00 PM

Partly cloudy night

63° 💧 None 💨 8 mph H 77%30.15 inHg

Sunday

2:00 AM

Mostly cloudy night

60° 💧 None 💨 5 mph H 70%30.12 inHg

5:00 AM

Overcast night

61° 💧 None 💨 6 mph H 59%30.09 inHg

8:00 AM

Overcast

66° 💧 None 💨 7 mph H 56%30.09 inHg

Today

11:00 AM

Overcast

73° 💧 None 💨 6 mph H 86%29.97 inHg

12:00 PM

Overcast

74° 💧 None 💨 8 mph H 81%29.97 inHg

1:00 PM

Light rain

76° 💧 0.01 in 💨 8 mph H 78%29.94 inHg

2:00 PM

Light rain

77° 💧 0.02 in 💨 8 mph H 73%29.94 inHg

3:00 PM

Light rain

79° 💧 0.01 in 💨 8 mph H 68%29.91 inHg

4:00 PM

Light rain

77° 💧 0.02 in 💨 10 mph H 64%29.91 inHg

5:00 PM

Moderate rain

71° 💧 0.08 in 💨 9 mph H 88%29.94 inHg

6:00 PM

Light rain

71° 💧 0.01 in 💨 5 mph H 90%29.94 inHg

7:00 PM

Mostly cloudy

69° 💧 None 💨 5 mph H 90%29.94 inHg

8:00 PM

Light rain

67° 💧 0.01 in 💨 5 mph H 91%29.97 inHg

9:00 PM

Mostly clear night

66° 💧 None 💨 9 mph H 90%30.00 inHg

10:00 PM

Mostly clear night

65° 💧 None 💨 8 mph H 86%30.00 inHg

11:00 PM

Mostly clear night

63° 💧 None 💨 10 mph H 82%30.03 inHg

Tomorrow

12:00 AM

Partly cloudy night

62° 💧 None 💨 10 mph H 76%30.06 inHg

1:00 AM

Partly cloudy night

63° 💧 None 💨 9 mph H 68%30.06 inHg

2:00 AM

Partly cloudy night

61° 💧 None 💨 8 mph H 68%30.09 inHg

3:00 AM

Mostly clear night

59° 💧 None 💨 7 mph H 71%30.09 inHg

4:00 AM

Clear night

57° 💧 None 💨 6 mph H 74%30.09 inHg

5:00 AM

Clear night

56° 💧 None 💨 7 mph H 76%30.12 inHg

6:00 AM

Clear night

55° 💧 None 💨 7 mph H 78%30.12 inHg

7:00 AM

Sunny

56° 💧 None 💨 7 mph H 75%30.15 inHg

8:00 AM

Sunny

60° 💧 None 💨 7 mph H 62%30.18 inHg

9:00 AM

Sunny

63° 💧 None 💨 7 mph H 51%30.18 inHg

10:00 AM

Sunny

68° 💧 None 💨 6 mph H 43%30.18 inHg

11:00 AM

Sunny

70° 💧 None 💨 4 mph H 39%30.18 inHg

12:00 PM

Sunny

75° 💧 None 💨 0 mph H 36%30.18 inHg

1:00 PM

Sunny

78° 💧 None 💨 3 mph H 36%30.15 inHg

2:00 PM

Sunny

76° 💧 None 💨 6 mph H 37%30.15 inHg

3:00 PM

Sunny

75° 💧 None 💨 8 mph H 39%30.12 inHg

4:00 PM

Sunny

74° 💧 None 💨 9 mph H 41%30.12 inHg

5:00 PM

Sunny

70° 💧 None 💨 10 mph H 46%30.12 inHg

6:00 PM

Sunny

72° 💧 None 💨 10 mph H 55%30.12 inHg

7:00 PM

Sunny

66° 💧 None 💨 8 mph H 62%30.12 inHg

8:00 PM

Clear night

64° 💧 None 💨 8 mph H 68%30.12 inHg

9:00 PM

Clear night

63° 💧 None 💨 8 mph H 72%30.15 inHg

10:00 PM

Clear night

62° 💧 None 💨 9 mph H 75%30.15 inHg

11:00 PM

Partly cloudy night

63° 💧 None 💨 8 mph H 77%30.15 inHg

Sunday

12:00 AM

Mostly cloudy night

62° 💧 None 💨 6 mph H 76%30.12 inHg

1:00 AM

Mostly cloudy night

62° 💧 None 💨 6 mph H 72%30.12 inHg

2:00 AM

Mostly cloudy night

60° 💧 None 💨 5 mph H 70%30.12 inHg

3:00 AM

Overcast night

60° 💧 None 💨 6 mph H 64%30.12 inHg

4:00 AM

Overcast night

60° 💧 None 💨 6 mph H 60%30.12 inHg

5:00 AM

Overcast night

61° 💧 None 💨 6 mph H 59%30.09 inHg

6:00 AM

Overcast night

61° 💧 None 💨 6 mph H 60%30.12 inHg

7:00 AM

Overcast

63° 💧 None 💨 6 mph H 60%30.09 inHg

8:00 AM

Overcast

66° 💧 None 💨 7 mph H 56%30.09 inHg

9:00 AM

Overcast

72° 💧 None 💨 9 mph H 49%30.09 inHg

10:00 AM

Overcast

74° 💧 None 💨 9 mph H 47%30.09 inHg

11:00 AM

Overcast

76° 💧 None 💨 10 mph H 45%30.06 inHg

12:00 PM

Overcast

78° 💧 None 💨 10 mph H 41%30.06 inHg

1:00 PM

Overcast

78° 💧 None 💨 9 mph H 43%30.03 inHg

2:00 PM

Overcast

80° 💧 None 💨 9 mph H 40%30.00 inHg

3:00 PM

Overcast

82° 💧 None 💨 8 mph H 36%29.97 inHg

4:00 PM

Overcast

82° 💧 None 💨 8 mph H 36%29.94 inHg

5:00 PM

Overcast

81° 💧 None 💨 8 mph H 41%29.94 inHg

6:00 PM

Overcast

78° 💧 None 💨 7 mph H 52%29.94 inHg

7:00 PM

Light rain

71° 💧 0.01 in 💨 5 mph H 70%29.94 inHg

8:00 PM

Light rain

69° 💧 0.01 in 💨 6 mph H 79%29.94 inHg

9:00 PM

Overcast night

69° 💧 None 💨 4 mph H 79%29.94 inHg

10:00 PM

Overcast night

70° 💧 None 💨 5 mph H 69%29.94 inHg

11:00 PM

Overcast night

71° 💧 None 💨 6 mph H 66%29.94 inHg

Monday

12:00 AM

Overcast night

70° 💧 None 💨 4 mph H 65%29.94 inHg

1:00 AM

Overcast night

70° 💧 None 💨 3 mph H 65%29.94 inHg

2:00 AM

Overcast night

69° 💧 None 💨 4 mph H 67%29.94 inHg

3:00 AM

Mostly cloudy night

67° 💧 None 💨 4 mph H 72%29.97 inHg

4:00 AM

Mostly cloudy night

65° 💧 None 💨 4 mph H 78%29.97 inHg

5:00 AM

Mostly cloudy night

63° 💧 None 💨 4 mph H 82%29.97 inHg

6:00 AM

Partly cloudy night

62° 💧 None 💨 5 mph H 85%30.00 inHg

7:00 AM

Partly cloudy

64° 💧 None 💨 4 mph H 84%30.03 inHg

8:00 AM

Partly cloudy

67° 💧 None 💨 5 mph H 77%30.03 inHg

9:00 AM

Sunny

69° 💧 None 💨 6 mph H 69%30.03 inHg

10:00 AM

Sunny

72° 💧 None 💨 5 mph H 60%30.06 inHg

11:00 AM

Sunny

73° 💧 None 💨 5 mph H 55%30.06 inHg

12:00 PM

Mostly sunny

74° 💧 None 💨 6 mph H 53%30.03 inHg

1:00 PM

Mostly sunny

74° 💧 None 💨 9 mph H 53%30.03 inHg

2:00 PM

Mostly sunny

71° 💧 None 💨 12 mph H 58%30.06 inHg

3:00 PM

Mostly cloudy

71° 💧 None 💨 11 mph H 60%30.03 inHg

4:00 PM

Mostly cloudy

70° 💧 None 💨 10 mph H 61%30.03 inHg

5:00 PM

Partly cloudy

70° 💧 None 💨 8 mph H 63%30.03 inHg

6:00 PM

Partly cloudy

69° 💧 None 💨 7 mph H 65%30.03 inHg

7:00 PM

Partly cloudy

66° 💧 None 💨 6 mph H 72%30.06 inHg

8:00 PM

Partly cloudy night

64° 💧 None 💨 5 mph H 79%30.06 inHg

9:00 PM

Clear night

62° 💧 None 💨 4 mph H 84%30.09 inHg

10:00 PM

Clear night

62° 💧 None 💨 4 mph H 86%30.09 inHg

11:00 PM

Mostly clear night

61° 💧 None 💨 4 mph H 89%30.09 inHg

Tuesday

12:00 AM

Partly cloudy night

61° 💧 None 💨 3 mph H 90%30.09 inHg

1:00 AM

Mostly cloudy night

61° 💧 None 💨 2 mph H 92%30.09 inHg

2:00 AM

Mostly cloudy night

60° 💧 None 💨 2 mph H 93%30.09 inHg

3:00 AM

Overcast night

60° 💧 None 💨 2 mph H 94%30.09 inHg

4:00 AM

Overcast night

59° 💧 None 💨 3 mph H 94%30.09 inHg

5:00 AM

Overcast night

59° 💧 None 💨 4 mph H 95%30.09 inHg

6:00 AM

Overcast night

59° 💧 None 💨 5 mph H 95%30.09 inHg

7:00 AM

Overcast

60° 💧 None 💨 5 mph H 91%30.12 inHg

8:00 AM

Overcast

61° 💧 None 💨 5 mph H 88%30.12 inHg

9:00 AM

Light rain

61° 💧 0.00 in 💨 5 mph H 88%30.12 inHg

10:00 AM

Overcast

62° 💧 None 💨 6 mph H 88%30.15 inHg

In South Portland and, more broadly, across the state of Maine: The rest of the day will feature mostly cloudy skies with temperatures ranging from the mid-60s to the upper 70s. There is a high chance of rain, with total accumulation expected to be around 0.39 inches. The rain could be steady at times, especially during the afternoon. Winds will be gentle, blowing from the southwest at up to 8 mph, with occasional gusts reaching 23 mph. Overall, expect a damp and breezy afternoon, so it’s a good idea to carry an umbrella if you're heading outdoors. Temperatures will gradually cool into the evening, but the weather remains unsettled with continued cloudy conditions.

15-Day Weather Outlook for South Portland

TomorrowTomorrow

Sunny 78°/55° 💧 None 💨 10 mph

Sunday, Aug 30Sun Aug 30

Light rain 82°/60° 💧 0.02 in 💨 10 mph

Monday, Aug 31Mon Aug 31

Sunny 73°/61° 💧 None 💨 12 mph

Tuesday, Sep 1Tue Sep 1

Moderate rain 63°/59° 💧 0.31 in 💨 6 mph

Wednesday, Sep 2Wed Sep 2

Heavy rain 64°/61° 💧 1.05 in 💨 17 mph

Thursday, Sep 3Thu Sep 3

Moderate rain 81°/65° 💧 0.77 in 💨 12 mph

Friday, Sep 4Fri Sep 4

Partly cloudy 75°/61° 💧 None 💨 16 mph

Saturday, Sep 5Sat Sep 5

Mostly cloudy 73°/59° 💧 None 💨 12 mph

Sunday, Sep 6Sun Sep 6

Partly cloudy 72°/56° 💧 None 💨 12 mph

Monday, Sep 7Mon Sep 7

Overcast 72°/56° 💧 None 💨 7 mph

Tuesday, Sep 8Tue Sep 8

Sunny 75°/57° 💧 None 💨 8 mph

Wednesday, Sep 9Wed Sep 9

Light rain 68°/60° 💧 0.01 in 💨 6 mph

Thursday, Sep 10Thu Sep 10

Sunny 66°/51° 💧 None 💨 12 mph

Friday, Sep 11Fri Sep 11

Mostly cloudy 64°/47° 💧 None 💨 8 mph

Saturday, Sep 12Sat Sep 12

Sunny 69°/52° 💧 None 💨 11 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in South Portland

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for South Portland

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 11:00 AM

PM2.5 Fine particles Good 4,7µg/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 7,3µg/m³

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

O₃ Ozone Fair 60,7µg/m³

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

NO₂ Nitrogen dioxide Good 8,8µg/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 South 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 6,0High 🙂Fair

Tomorrow UV 7,0High 🙂Fair

Sunday UV 7,0High 😐Moderate

Monday UV 7,0High 😐Moderate

Tuesday UV 4,0Moderate 🙂Fair

Wednesday UV 4,0Moderate —Unavailable

Thursday UV 6,0High —Unavailable

Hourly UV index today

11:00 AMUV 6,0 12:00 PMUV 6,0 1:00 PMUV 6,0 2:00 PMUV 6,0 3:00 PMUV 6,0 4:00 PMUV 6,0 5:00 PMUV 5,0 6:00 PMUV 5,0 7:00 PMUV 5,0

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

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

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 South Portland

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

Internal PR simulation: 4.46 Population: 26,930

DISCOVER WEATHER NEARBY Weather in other cities

Explore current conditions and forecasts for other locations.

Forecast data for South Portland were last refreshed today at 10:29 AM. The current forecast period extends through 30/08/2026 at 8:00 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.