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Portsmouth, Hampshire

16 Day Weather Forecast

Overview

The pattern appears changeable, with neither high nor low pressure fully in control. Much of the period looks relatively dry.

A sharp change in overnight temperatures is forecast later on, around Wednesday 26th August, and overnight lows are set to drop through the period, and conditions may turn more unsettled as the period progresses.

Pleasant temperatures are anticipated, with highs around 20°C or a little above. The mildest conditions are forecast on on Tuesday 18 August, with highs near 24°C. Overnight temperatures will dip lowest on Wednesday 26 August, falling to 9°C.

Strong winds may develop around Tuesday 1 September, with gusts near 45mph.

These forecasts use interpolation to improve accuracy for your specific location, and are powered by either ECMWF or GFS model data depending on your selection. As with all weather forecasts, confidence decreases rapidly beyond 5 days ahead — treat the later dates as a heads-up about possible conditions rather than a firm prediction.

If you have a moment, please let us know what you think.

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Date Weather Temp Wind
Sun
16 Aug
Weather 20°C Wind direction 2mph
Mon
17 Aug
Weather 23°C Wind direction 11mph
Tue
18 Aug
Weather 22°C Wind direction 14mph
Wed
19 Aug
Weather 20°C Wind direction 17mph
Thu
20 Aug
Weather 20°C Wind direction 19mph
Fri
21 Aug
Weather 19°C Wind direction 3mph
Sat
22 Aug
Weather 18°C Wind direction 9mph
Sun
23 Aug
Weather 21°C Wind direction 15mph
Mon
24 Aug
Weather 21°C Wind direction 22mph
Tue
25 Aug
Weather 17°C Wind direction 19mph
Wed
26 Aug
Weather 21°C Wind direction 8mph
Thu
27 Aug
Weather 22°C Wind direction 12mph
Fri
28 Aug
Weather 23°C Wind direction 9mph
Sat
29 Aug
Weather 21°C Wind direction 14mph
Sun
30 Aug
Weather 19°C Wind direction 17mph
Mon
31 Aug
Weather 22°C Wind direction 18mph
Hourly 30 day
Issued: 16/08 15:35 | Help

Graphs

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Max temp Min temp Surface Pressure Wind speed Wind gust
Rain total Freezing level Cloud cover Humidity

High impact weather

Assess the chance of frost, strong winds, heavy rain, and snow based on the data utilised in this forecast.

Will it forecasts

Data from different computer models is blended to increase accuracy.

Will it rain in Portsmouth, Hampshire

Will it be hot in Portsmouth, Hampshire

Will it snow in Portsmouth, Hampshire

Will it be frosty in Portsmouth, Hampshire

Will it thunder in Portsmouth, Hampshire

MOGREPS-G forecast

Forecast charts using data from the UK Met Office MOGREPS-G ensemble model.

Information about MOGREPS-G.

GEFS forecast

Forecast charts using data from the NCEP GEFS ensemble model.

Sun & Moon Calendar for Portsmouth, Hampshire

View complete sun & moon times, phases and celestial data for Portsmouth, Hampshire