As of 20:26 BST

Weather in Portland Port

+21°Weather now

Portland Port, Saturday, 8 August, 20:26

Overcast. Feels like 21°C. High 23°C, low 13°C.

Pressure1016 mb
Wind10 mph E
Humidity69%
Visibility6.2 mi
Dew point15°C
Sun, 09+16 ° /23 °0Mainly clear
+23 °Mainly clear

Portland Port, Sunday, 9 August

Mainly clear. High 23°C, low 16°C.

Pressure1014 mb
Wind9 mph SW
Humidity51%
Visibility6.2 mi
Dew point10°C
Mon, 10+15 ° /21 °0Overcast
+21 °Overcast

Portland Port, Monday, 10 August

Overcast. High 21°C, low 15°C.

Pressure1020 mb
Wind7 mph W
Humidity66%
Visibility6.2 mi
Dew point14°C
Tue, 11+17 ° /21 °0Clear sky
+21 °Clear sky

Portland Port, Tuesday, 11 August

Clear sky. High 21°C, low 17°C.

Pressure1024 mb
Wind18 mph E
Humidity66%
Visibility6.2 mi
Dew point13°C
Wed, 12+17 ° /23 °0Partly cloudy
+23 °Partly cloudy

Portland Port, Wednesday, 12 August

Partly cloudy. High 23°C, low 17°C.

Pressure1022 mb
Wind17 mph E
Humidity63%
Visibility6.2 mi
Dew point13°C
Thu, 13+20 ° /23 °0Clear sky
+23 °Clear sky

Portland Port, Thursday, 13 August

Clear sky. High 23°C, low 20°C.

Pressure1018 mb
Wind14 mph E
Humidity66%
Visibility—
Dew point15°C
Fri, 14+18 ° /22 °0Partly cloudy
+22 °Partly cloudy

Portland Port, Friday, 14 August

Partly cloudy. High 22°C, low 18°C.

Pressure1018 mb
Wind18 mph SW
Humidity77%
Visibility—
Dew point17°C
Sat, 15+17 ° /22 °0Partly cloudy
+22 °Partly cloudy

Portland Port, Saturday, 15 August

Partly cloudy. High 22°C, low 17°C.

Pressure1015 mb
Wind16 mph W
Humidity71%
Visibility—
Dew point15°C
Sun, 16+16 ° /20 °0.6Light rain
+20 °Light rain

Portland Port, Sunday, 16 August

Light rain. High 20°C, low 16°C.

Pressure1018 mb
Wind12 mph N
Humidity76%
Visibility—
Dew point15°C
Mon, 17+17 ° /19 °2.8Light rain
+19 °Light rain

Portland Port, Monday, 17 August

Light rain. High 19°C, low 17°C.

Pressure1016 mb
Wind23 mph SW
Humidity80%
Visibility—
Dew point14°C
Tue, 18+17 ° /21 °0Clear sky
+21 °Clear sky

Portland Port, Tuesday, 18 August

Clear sky. High 21°C, low 17°C.

Pressure1014 mb
Wind19 mph NW
Humidity67%
Visibility—
Dew point14°C
Wed, 19+14 ° /19 °0Partly cloudy
+19 °Partly cloudy

Portland Port, Wednesday, 19 August

Partly cloudy. High 19°C, low 14°C.

Pressure1014 mb
Wind19 mph SW
Humidity62%
Visibility—
Dew point11°C
Thu, 20+16 ° /21 °2.2Light rain
+21 °Light rain

Portland Port, Thursday, 20 August

Light rain. High 21°C, low 16°C.

Pressure1008 mb
Wind24 mph W
Humidity73%
Visibility—
Dew point15°C
Fri, 21+15 ° /20 °0Overcast
+20 °Overcast

Portland Port, Friday, 21 August

Overcast. High 20°C, low 15°C.

Pressure1015 mb
Wind19 mph NW
Humidity56%
Visibility—
Dew point9°C
Sat, 22+16 ° /20 °0Overcast
+20 °Overcast

Portland Port, Saturday, 22 August

Overcast. High 20°C, low 16°C.

Pressure1017 mb
Wind26 mph W
Humidity63%
Visibility—
Dew point12°C
Sun, 23+14 ° /19 °0Overcast
+19 °Overcast

Portland Port, Sunday, 23 August

Overcast. High 19°C, low 14°C.

Pressure1023 mb
Wind19 mph NW
Humidity54%
Visibility—
Dew point9°C

Questions about the month ahead

How accurate is a month-long forecast?

The first 16 days come from weather models — highly reliable for the first 3–5 days, gradually less so after that. Days 17 to 30 for Portland Port are built from climate averages over the last 60 years, so they show typical weather for those dates rather than a specific forecast.

What does "above average" mean?

We compare the forecast with the climate average for exactly the same calendar days, calculated from 60 years of observations. The difference shows how the coming month compares with a typical one.

Where do the 66-year records come from?

These are real historical extremes recorded in Portland Port since 1960: the highest and lowest temperature for each calendar date, with the year it happened.

How often is the 30-day forecast updated?

The forecast portion refreshes every hour. The climate portion is based on long-term data and stays stable.