Portland, ME 14-Day Forecast
Maine, United States 🇺🇸
74°
Sunny right now
Today: high 74°, low 66°
Updated 5 hours ago
Portland weather for the next 14 days
Tuesday, August 18
Mist High 69° Low 64°Precipitation
47%
· 0.01 in
Max wind
8 mph
Humidity
95%
UV index
6 - Moderate
Sunrise / sunset
05:49 AM / 07:40 PM
Wednesday, August 19
Mist High 70° Low 65°Precipitation
21%
· 0.0 in
Max wind
17 mph
Humidity
90%
UV index
7 - High
Sunrise / sunset
05:50 AM / 07:39 PM
Thursday, August 20
Partly Cloudy High 68° Low 64°Precipitation
65%
· 0.05 in
Max wind
8 mph
Humidity
84%
UV index
4 - Moderate
Sunrise / sunset
05:51 AM / 07:37 PM
Friday, August 21
Overcast High 67° Low 62°Precipitation
23%
· 0.0 in
Max wind
8 mph
Humidity
85%
UV index
2 - Low
Sunrise / sunset
05:52 AM / 07:35 PM
Saturday, August 22
Sunny High 68° Low 62°Precipitation
15%
· 0.0 in
Max wind
10 mph
Humidity
82%
UV index
5 - Moderate
Sunrise / sunset
05:53 AM / 07:34 PM
Sunday, August 23
Overcast High 68° Low 64°Precipitation
30%
· 0.0 in
Max wind
14 mph
Humidity
90%
UV index
4 - Moderate
Sunrise / sunset
05:54 AM / 07:32 PM
Monday, August 24
Overcast High 77° Low 64°Precipitation
13%
· 0.0 in
Max wind
15 mph
Humidity
72%
UV index
6 - High
Sunrise / sunset
05:55 AM / 07:30 PM
Tuesday, August 25
Overcast High 65° Low 61°Precipitation
15%
· 0.0 in
Max wind
16 mph
Humidity
67%
UV index
5 - Moderate
Sunrise / sunset
05:57 AM / 07:29 PM
Wednesday, August 26
Overcast High 65° Low 61°Precipitation
68%
· 0.07 in
Max wind
11 mph
Humidity
78%
UV index
4 - Moderate
Sunrise / sunset
05:58 AM / 07:27 PM
Thursday, August 27
Overcast High 62° Low 59°Precipitation
89%
· 0.64 in
Max wind
21 mph
Humidity
84%
UV index
4 - Moderate
Sunrise / sunset
05:59 AM / 07:25 PM
Friday, August 28
Patchy rain nearby High 61° Low 60°Precipitation
87%
· 0.16 in
Max wind
17 mph
Humidity
92%
UV index
4 - Moderate
Sunrise / sunset
06:00 AM / 07:24 PM
Saturday, August 29
Patchy rain nearby High 63° Low 61°Precipitation
65%
· 0.03 in
Max wind
12 mph
Humidity
84%
UV index
4 - Moderate
Sunrise / sunset
06:01 AM / 07:22 PM
Sunday, August 30
Sunny High 68° Low 61°Precipitation
9%
· 0.0 in
Max wind
12 mph
Humidity
78%
UV index
6 - High
Sunrise / sunset
06:02 AM / 07:20 PM
Portland 14-day outlook: the story
The warmest day of Portland's 14-day outlook is Monday, August 24 with a high near 77°F (25°C); the coolest night comes Thursday, August 27, dipping to 59°F (15°C). The trend points cooler: week two runs about 3°F below week one. Highs over the next two weeks average 69°F (21°C), about 8°F (4°C) below the typical August high of 77°F (25°C).
Precipitation is most likely on Monday 17, Thursday 20, Wednesday 26, Thursday 27 and beyond; the wettest day looks like Thursday, August 27 with about 0.64 in (16.2 mm) expected. For the weekend, expect Saturday 68°F (20°C) and sunny / Sunday 68°F (20°C) and overcast.
For typical conditions month by month, see the Portland climate & average temperatures guide.
Portland forecast questions
Will it rain in Portland this week?
The forecast currently shows meaningful precipitation chances on 6 of the next 14 days, peaking around Thursday, August 27.
What will be the warmest day in Portland over the next 14 days?
Monday, August 24, with a forecast high near 77°F (25°C).
How accurate is a 14-day forecast for Portland?
Days 1-3 are highly reliable, days 4-7 capture the overall pattern well, and days 8-14 indicate trends rather than exact figures - check back as the date approaches; this page refreshes throughout the day.
Average temperatures in Portland by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 33° | 19° | 10 | 4.1 in | 5.9 h/day | 68% |
| February | 35° | 18° | 9 | 3.2 in | 6.9 h/day | 69% |
| March | 42° | 26° | 11 | 3.8 in | 8.0 h/day | 67% |
| April | 51° | 36° | 11 | 4.5 in | 8.2 h/day | 70% |
| May | 63° | 47° | 9 | 2.7 in | 10.1 h/day | 72% |
| June | 72° | 57° | 11 | 3.8 in | 11.1 h/day | 76% |
| July | 78° | 64° | 10 | 3.8 in | 11.3 h/day | 77% |
| August | 77° | 63° | 11 | 3.6 in | 10.8 h/day | 78% |
| September | 71° | 57° | 8 | 3.4 in | 9.4 h/day | 78% |
| October | 60° | 47° | 9 | 4.5 in | 7.1 h/day | 77% |
| November | 47° | 35° | 9 | 3.8 in | 6.5 h/day | 71% |
| December | 38° | 26° | 11 | 5.0 in | 5.7 h/day | 72% |
14-day forecasts nearby