Weather in Portland

14-day forecast · updated today, Wednesday, October 28, at 5:57 pm (EDT)

Now · mainly clear 46 °F

Feels like: 40 °F
Low / high: 29 / 51 °F
Rain: 2%
Wind: 7 mph SSW

↘ 30.38 inHg · falling

Today in Portland: overcast, 29 °F to 51 °F, with a 2% chance of rain and a light breeze from the south-southwest (7 mph). Tomorrow, overcast, 40 °F to 65 °F and a 7% chance of rain. The warmest day of the week is Friday 30, at 66 °F. Next likely rain: Wednesday 4 (21%).

Measured now at the airport

Portland (KPWM), 2.5 mi away · 7 min ago

Visibility9.9 mi or more

WeatherNothing to note

Temperature46 °F

Wind5 mph from the south-southwest

It's what the airport's weather station measured, not a forecast: on the coast, wind and fog can be different. Airports report every 30 or 60 minutes.

Airport METAR report, via NOAA's Aviation Weather Center (aviationweather.gov). Sources and licenses

Temperatures for the next 14 days

51° 29°
Today
65° 40°
Thu 29
66° 46°
Fri 30
51° 36°
Sat 31
56° 31°
Sun 1
62° 38°
Mon 2
57° 42°
Tue 3
58° 41°
Wed 4
58° 43°
Thu 5
58° 46°
Fri 6
55° 43°
Sat 7
53° 38°
Sun 8
52° 35°
Mon 9
49° 36°
Tue 10

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 28	Overcast	29 / 51 °F	2%	9 mph WSW	1.5 ft	12:46 am · 12:54 pm	HRRR
Thu 29	Overcast	40 / 65 °F	7%	12 mph SW	2.7 ft	1:36 am · 1:44 pm	HRRR + NBM
Fri 30	Drizzle	46 / 66 °F	13%	13 mph W	2.6 ft	2:29 am · 2:39 pm	NBM
Sat 31	Clear sky	36 / 51 °F	0%	11 mph NW	1.2 ft	3:28 am · 3:40 pm	NBM
Sun 1	Mainly clear	31 / 56 °F	0%	7 mph WSW	1.2 ft	3:33 am · 3:47 pm	NBM
Mon 2	Overcast	38 / 62 °F	8%	7 mph WSW	1.0 ft	4:40 am · 4:57 pm	NBM
Tue 3	Overcast	42 / 57 °F	18% · 0.02 in	7 mph E	1.1 ft	5:46 am · 6:06 pm	NBM
Wed 4	Overcast	41 / 58 °F	21% · 0.08 in	9 mph SW	2.6 ft	6:49 am · 7:12 pm	NBM
Thu 5	Overcast	43 / 58 °F	30% · 0.34 in	10 mph ESE	2.8 ft	7:45 am · 8:11 pm	NBM
Fri 6	Light drizzle	46 / 58 °F	40% · 0.51 in	13 mph SSE	4.1 ft	8:35 am · 9:04 pm	NBM
Sat 7	Heavy drizzle	43 / 55 °F	29% · 0.20 in	10 mph WNW	5.5 ft	9:20 am · 9:52 pm	NBM
Sun 8	Drizzle	38 / 53 °F	27% · 0.13 in	11 mph WNW	5.0 ft	10:02 am · 10:37 pm	NBM + ECMWF
Mon 9	Clear sky	35 / 52 °F	19%	5 mph WNW	2.2 ft	10:41 am · 11:19 pm	ECMWF
Tue 10	Partly cloudy	36 / 49 °F	20%	7 mph ENE	2.0 ft	11:19 am · 11:59 pm	ECMWF

Each hour comes from the best model for this spot: HRRR until Thursday 29 12:00 pm; then NBM until Sunday 8 2:00 pm; then ECMWF until Thursday 12 10:00 am; then GFS.

Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore. High tides: our own tide calculation.

Today, every 3 hours

Time	12:00 am	3:00 am	6:00 am	9:00 am	12:00 pm	3:00 pm	6:00 pm	9:00 pm
Sky	Clear	Clear	Clear	Mainly clear	Overcast	Overcast	Mainly clear	Clear
Temperature	38°	34°	30°	35°	48°	50°	46°	43°
Chance of rain	0%	0%	0%	0%	0%	1%	1%	1%
Rain	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in
Wind (mph)	9 NNE	7 N	3 NW	3 WNW	3 SSW	7 S	7 SSW	7 SW
Humidity	49%	59%	71%	70%	37%	49%	66%	81%
UV	0	0	0	1	3	1	0	0
Model	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR

Do the models agree?

Medium confidence

They broadly agree, but not quite on temperature tomorrow: take it with some caution.

What 6 forecast models say for the next few days. The closer they are, the more reliable the forecast.

HighRainWind

Do the models agree? · High
High (°F)	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	47°	62°	60°	49°	53°	59°	57°
AIFS	47°	60°	60°	50°	52°	59°	62°
GFS	51°	67°	66°	53°	57°	56°	50°
ICON	48°	68°	67°	51°	54°	69°	59°
HRRR	51°	66°	—	—	—	—	—
NBM	49°	65°	66°	51°	56°	62°	57°
Confidence	high	medium	medium	high	high	high	high

Do the models agree? · Rain
Rain	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	0	0	0.09 in	0	0	0	0
AIFS	0	0.01 in	0.01 in	0	0	0	0
GFS	0	0	0	0	0	0	0
ICON	0	0	0.01 in	0	0	0	0
HRRR	0	0	—	—	—	—	—
NBM	0	0	0	0	0	0	0.01 in
Confidence	high	high	high	high	high	high	high

Do the models agree? · Wind
Wind (mph)	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	916	1220	1324	1326	617	715	715
AIFS	10	15	14	13	8	9	13
GFS	719	1032	1533	1126	47	923	916
ICON	514	921	1330	1125	411	1024	1228
HRRR	921	1322	—	—	—	—	—
NBM	711	1219	1320	1117	710	710	710
Confidence	high	high	high	high	high	high	high

Chance of rain from the ensemble models

Model	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF (51 scenarios)	0%	0%	47%	0%	0%	2%	9%
GFS (GEFS, 31 scenarios)	0%	0%	20%	0%	0%	29%	29%
NBM (NOAA)	2%	7%	13%	0%	0%	8%	18%
Thunderstorm (NBM)	0%	0%	3%	0%	0%	0%	0%

Each model's day runs midnight to midnight local time; models that reach fewer days are left blank. Rain: daily total. Wind: the day's highest average wind and, in small type, the strongest gust. Highlighted: values that stand out from the rest. The chance of rain comes from many runs of the same model with slightly different starting data.

Outlook

How the coming weeks and months compare with what is normal for the time of year. It is a trend, not a day-by-day forecast.

Next few weeks, compared with normal: a bit warmer and normal rain.

Next 6 weeks

When	TemperatureTemp.	Rain	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	Above +4.7 °F	Normal	—
Nov 9 – Nov 15Nov 9–Nov 15	A bit above +1.1 °F	Normal	49° / 39°
Nov 16 – Nov 22Nov 16–Nov 22	A bit above +2.2 °F	Normal	48° / 38°
Nov 23 – Nov 29Nov 23–Nov 29	Above +2.7 °F	A bit above +34%	45° / 37°
Nov 30 – Dec 6Nov 30–Dec 6	A bit above +2.3 °F	A bit above +33%	43° / 34°

Coming months

When	TemperatureTemp.	Rain
November	A bit above +1.4 °F	Normal
December	Above +3.8 °F	A bit above +27%
January	Above +5.2 °F	A bit above +47%
February	Above +3.8 °F	A bit above +38%
March	Above +4.0 °F	A bit above +24%

Weeks: ECMWF 46-day (average of its scenarios), against the normal of the last 20 years for those dates. Months: ECMWF SEAS5. Rain: total against normal. The further ahead, the closer it gets to normal and the less detail it can give. The long-range sea temperature isn't usable at this spot (the model's grid cell falls on land).

Portland climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Portland is from June to September: highs of 72 °F to 80 °F, about 9 rainy days a month and 7 hours of sunshine a day.

Tropical cyclones rarely pass near Portland: 2 within 93 mi in the last 30 years (1996–2025), most recently Floyd, in September 1999.

32° 14°

JanJ
36° 16°

FebF
43° 25°

MarM
55° 35°

AprA
66° 45°

MayM
75° 54°

JunJ
80° 60°

JulJ
79° 59°

AugA
72° 51°

SepS
60° 40°

OctO
48° 31°

NovN
38° 22°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves
JanuaryJan	32°	14°	3.60 in	8	3.7	42°	4.7 ft
FebruaryFeb	36°	16°	3.33 in	8	5.0	39°	4.5 ft
MarchMar	43°	25°	4.25 in	9	5.7	38°	4.4 ft
AprilApr	55°	35°	4.57 in	9	6.4	41°	4.1 ft
MayMay	66°	45°	3.73 in	10	6.5	48°	3.1 ft
JuneJun	75°	54°	3.61 in	10	7.1	55°	2.8 ft
JulyJul	80°	60°	3.14 in	11	7.6	62°	2.6 ft
AugustAug	79°	59°	3.11 in	9	7.5	63°	2.6 ft
SeptemberSep	72°	51°	3.31 in	8	6.2	60°	3.4 ft
OctoberOct	60°	40°	5.22 in	9	4.1	54°	4.0 ft
NovemberNov	48°	31°	4.21 in	8	3.2	49°	4.2 ft
DecemberDec	38°	22°	4.65 in	10	2.9	45°	4.4 ft

Month	Water	Waves
Jan	42°	4.7 ft
Feb	39°	4.5 ft
Mar	38°	4.4 ft
Apr	41°	4.1 ft
May	48°	3.1 ft
Jun	55°	2.8 ft
Jul	62°	2.6 ft
Aug	63°	2.6 ft
Sep	60°	3.4 ft
Oct	54°	4.0 ft
Nov	49°	4.2 ft
Dec	45°	4.4 ft

Days: rainy days in the month. Sun: hours a day.

A normal year brings 46.73 in of rain on about 107 days and about 2,000 hours of sunshine.

1991–2020 averages. Highs, lows and rainfall: TerraClimate; rainy days (0.04 in or more): NASA POWER (MERRA-2); sunshine hours: estimated from solar radiation; water: NOAA OISST; waves (average height): ERA5, 2011–2020. Normals are not a forecast: any given year can turn out very different. Sources and licenses

Temperature

Now46 °Ffeels like 40 °F

Tomorrow40 / 65 °F

It's 46 °F now (feels like 40 °F). Today, 29 °F to 51 °F; tomorrow, 40 °F to 65 °F.

Chance of rain

Today 2%
Thu 29 7%
Fri 30 13%
Sat 31 0%
Sun 1 0%
Mon 2 8%
Tue 3 18% 0.02 in

Today the chance of rain reaches 2%. The next day with likely rain is Wednesday 4: 21% and 0.08 in.

Recent rain: last 24 hours, 0.00 in; last 3 days, 0.07 in; last 7 days, 0.07 in.

Humidity and dew point

Humidity66%

Dew point35 °F

Humidity is 66% now and the dew point is 35 °F.

The dew point is the temperature at which the air becomes saturated: the higher it is, the heavier the air feels.

Visibility and fog

Now16 migood

Clouds22%

Visibility is good now (16 mi). No fog expected today.

The model gives visibility up to about 15 mi: beyond that, the horizon is clear.

UV index

Now0

Today's peak3low

Thu 29: 3 · Fri 30: 2 · Sat 31: 2

Index	Level	What to do
0–2	low	No special protection needed.
3–5	moderate	Hat, sunglasses and sunscreen around midday.
6–7	high	Sunscreen, hat and shade between 12 and 4 pm.
8–10	very high	Avoid the midday sun; reflection off the water adds to it.
11+	extreme	Avoid the sun between 11 am and 5 pm; protect yourself even if it is cloudy.

Reflection off water and sand adds radiation: protect yourself more on a boat or at the beach.

Barometric pressure

↗ Rising Anglers say fish bite less for a while
→ Steady Anglers expect normal activity
↘ Falling · now Anglers say fish feed more before the change

30.0030.2030.40 29.87

Falling now (−0.03 inHg in 3 hours). Over the next 48 hours: −0.38 inHg. Falling pressure: anglers say fish feed more before the change. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityGood · 29

Saharan dustNo

Previous days

The weather over the last 30 days, as the models analyzed it. Tap a day to see it hour by hour.

Day	Sky	Low / high	Rain	Max wind
Tue 27	Overcast	39 / 51 °F	0	11 mph NNW
Mon 26	Drizzle	39 / 63 °F	0.07 in	12 mph NW
Sun 25	Mainly clear	37 / 59 °F	0	7 mph WSW
Sat 24	Mainly clear	35 / 57 °F	0	7 mph WNW
Fri 23	Clear sky	40 / 54 °F	0	13 mph N
Thu 22	Overcast	43 / 61 °F	0	14 mph N
Wed 21	Overcast	41 / 56 °F	0	12 mph NNE

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Tue 20	Mainly clear	40 / 63 °F	0	12 mph N
Mon 19	Clear sky	38 / 56 °F	0	8 mph SSW
Sun 18	Clear sky	34 / 52 °F	0	9 mph SW
Sat 17	Overcast	38 / 57 °F	0	15 mph NW
Fri 16	Light drizzle	43 / 61 °F	0.18 in	14 mph SSW
Thu 15	Overcast	45 / 58 °F	0	13 mph NW
Wed 14	Drizzle	49 / 66 °F	0.12 in	10 mph NW
Tue 13	Light rain	45 / 56 °F	0.67 in	13 mph E
Mon 12	Drizzle	49 / 68 °F	0.15 in	14 mph N
Sun 11	Heavy drizzle	41 / 56 °F	0.14 in	9 mph SSW
Sat 10	Overcast	45 / 58 °F	0	10 mph NW
Fri 9	Partly cloudy	49 / 63 °F	0	14 mph W
Thu 8	Drizzle	50 / 67 °F	0.12 in	11 mph SW
Wed 7	Overcast	40 / 58 °F	0	12 mph SSW
Tue 6	Mainly clear	46 / 57 °F	0	15 mph WNW
Mon 5	Overcast	51 / 66 °F	0	15 mph W
Sun 4	Overcast	45 / 59 °F	0	9 mph ENE
Sat 3	Overcast	50 / 64 °F	0	9 mph N
Fri 2	Drizzle	61 / 77 °F	0.08 in	11 mph WSW
Thu 1	Overcast	56 / 69 °F	0	11 mph SSW
Wed 30	Light drizzle	56 / 62 °F	0.01 in	6 mph SSW
Tue 29	Light rain	56 / 64 °F	0.22 in	11 mph N
Mon 28	Light rain	55 / 57 °F	1.00 in	14 mph NE

These are the models at the start of each day (ECMWF and GFS; waves from Météo-France), not readings from a weather station: there can be differences at specific spots.

Questions about the weather in PortlandQuestions

What's the weather like today in Portland?

Overcast, from 29 °F to 51 °F, with a light breeze from the south-southwest (7 mph) and a 2% chance of rain.

Will it rain tomorrow in Portland?

On Thursday 29 the chance of rain is 7% (0.00 in): overcast.

How warm will it be this week?

Between a low of 29 °F and a high of 66 °F; the warmest day, Friday 30.

What's the UV index today?

It reaches 3 (low). No special protection needed.

Is the pressure rising or falling?

It's 30.38 inHg and falling: +0.05 inHg over the last 24 hours.

When is the best time to visit Portland?

The best time to visit Portland is from June to September: highs of 72 °F to 80 °F, about 9 rainy days a month and 7 hours of sunshine a day.

What is the weather like in Portland in October?

In October, Portland normally sees highs of 60 °F and lows of 40 °F, with about 9 rainy days (5.22 in for the month) and 4 hours of sunshine a day. The sea is around 54 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Portland?

The warmest is July, with average highs of 80 °F, and the coldest January, with lows of 14 °F. The wettest is October (5.22 in) and the driest, August.

More about Portland today

Weather near Portland

Only places with a different forecast: spots a few miles apart share the same model cell and wouldn't add anything.

Learn more

Weather: Open-Meteo, CC BY 4.0, with the best model for each spot and lead time (NOAA HRRR and NBM in the U.S., Météo-France AROME, DWD ICON-EU, ECMWF IFS and NOAA GFS); ECMWF grid point 6.4 mi away. The comparison also uses ICON (DWD), AIFS (ECMWF) and ARPEGE (Météo-France). Outlook: ECMWF 46-day and SEAS5. Chance of rain from ensemble models (ECMWF, GEFS and NBM). UV, air quality and pollen: CAMS (Copernicus).

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 5:57 pm (local time).

Spotted a mistake? Tell us · Where the weather and sea data come from