As of 20:53 BST

Weather in Portsmouth

+18°Weather now

Portsmouth, Saturday, 8 August, 20:53

Overcast. Feels like 19°C. High 25°C, low 9°C.

Pressure1016 mb
Wind3 mph W
Humidity100%
Visibility6.2 mi
Dew point18°C

Two-week forecast for Portsmouth: the first week averages +26.3° by day, the second +16.6° — so the second week runs 9.7° cooler than the first. Around 6 mm of rain is expected over the 14 days, on 3 wet days. The coming weekend starts 8 August: +25°, dry.

First and second week

WeekDayNightRainfallvs average
1st (8 August – 14 August)+26.3°+12.3°0 mm / 0 d—
2nd (15 August – 21 August)+16.6°+10.9°6 mm / 3 d—

Weekend weather

Sat, 8 August
Overcast
+25°+9°
dry
Sun, 9 August
Overcast
+22°+11°
dry
Sat, 15 August
Light rain
+19°+14°
0.9 mm
Sun, 16 August
Light rain
+17°+13°
2.2 mm
Sun, 09+11 ° /22 °0Overcast
+22 °Overcast

Portsmouth, Sunday, 9 August

Overcast. High 22°C, low 11°C.

Pressure1013 mb
Wind13 mph W
Humidity56%
Visibility6.2 mi
Dew point10°C
Mon, 10+10 ° /20 °0Partly cloudy
+20 °Partly cloudy

Portsmouth, Monday, 10 August

Partly cloudy. High 20°C, low 10°C.

Pressure1021 mb
Wind10 mph NW
Humidity41%
Visibility6.2 mi
Dew point5°C
Tue, 11+10 ° /26 °0Mainly clear
+26 °Mainly clear

Portsmouth, Tuesday, 11 August

Mainly clear. High 26°C, low 10°C.

Pressure1024 mb
Wind11 mph S
Humidity41%
Visibility6.2 mi
Dew point9°C
Wed, 12+14 ° /30 °0Overcast
+30 °Overcast

Portsmouth, Wednesday, 12 August

Overcast. High 30°C, low 14°C.

Pressure1022 mb
Wind12 mph S
Humidity29%
Visibility6.2 mi
Dew point6°C
Thu, 13+17 ° /35 °0Partly cloudy
+35 °Partly cloudy

Portsmouth, Thursday, 13 August

Partly cloudy. High 35°C, low 17°C.

Pressure1018 mb
Wind10 mph S
Humidity19%
Visibility—
Dew point4°C
Fri, 14+16 ° /27 °0Mainly clear
+27 °Mainly clear

Portsmouth, Friday, 14 August

Mainly clear. High 27°C, low 16°C.

Pressure1015 mb
Wind13 mph W
Humidity46%
Visibility—
Dew point13°C
Sat, 15+14 ° /19 °0.9Light rain
+19 °Light rain

Portsmouth, Saturday, 15 August

Light rain. High 19°C, low 14°C.

Pressure1017 mb
Wind10 mph NE
Humidity78%
Visibility—
Dew point14°C
Sun, 16+13 ° /17 °2.2Light rain
+17 °Light rain

Portsmouth, Sunday, 16 August

Light rain. High 17°C, low 13°C.

Pressure1019 mb
Wind6 mph E
Humidity88%
Visibility—
Dew point12°C
Mon, 17+11 ° /15 °1.2Light rain
+15 °Light rain

Portsmouth, Monday, 17 August

Light rain. High 15°C, low 11°C.

Pressure1010 mb
Wind16 mph W
Humidity92%
Visibility—
Dew point12°C
Tue, 18+11 ° /15 °0.1Light rain
+15 °Light rain

Portsmouth, Tuesday, 18 August

Light rain. High 15°C, low 11°C.

Pressure1012 mb
Wind19 mph W
Humidity59%
Visibility—
Dew point7°C
Wed, 19+10 ° /16 °1.3Light rain
+16 °Light rain

Portsmouth, Wednesday, 19 August

Light rain. High 16°C, low 10°C.

Pressure1012 mb
Wind20 mph W
Humidity63%
Visibility—
Dew point8°C
Thu, 20+10 ° /15 °0.2Light rain
+15 °Light rain

Portsmouth, Thursday, 20 August

Light rain. High 15°C, low 10°C.

Pressure1013 mb
Wind15 mph W
Humidity72%
Visibility—
Dew point9°C
Fri, 21+9 ° /18 °0.5Light rain
+18 °Light rain

Portsmouth, Friday, 21 August

Light rain. High 18°C, low 9°C.

Pressure1015 mb
Wind10 mph W
Humidity48%
Visibility—
Dew point6°C

Forecast questions

Can I plan a trip on a two-week forecast?

The first week is solid for planning. The second week shows the trend — go by the averages and the comparison with the climate normal, and check again closer to the date.

What does the "vs average" column mean?

It is the difference between the forecast and the climate average for the same dates in Portsmouth, calculated from 60 years of observations. A plus means the week is warmer than usual.

Why are weekends shown separately?

Saturday and Sunday plans are what people ask about most, so we break them out as separate cards with temperature and rainfall.