England

Portslade-by-Sea Pressure & Humidity

Brighton and Hove — Barometric Trends

Portslade-by-Sea Pressure & Humidity Outlook

Today in Portslade-by-Sea, the barometer sits near 998 mb, firmly on the low side, with plenty of moisture in the air, giving it a damp feel early on. That keeps the background more unsettled, with conditions more likely to shift as systems move through. With a wide spread in values, the background feel can swing between steadier and more mixed spells. A gentle rise later on would slightly favour more settled spells.

Looking ahead, pressure is expected to range between 998 mb up to 1024 mb during the period ahead. Pressure trends higher through the coming days, favouring quieter spells at times. Moisture levels fluctuate within a fairly typical range for the time of year.

Current Readings

Pressure

998 mb

Humidity

82%

Dew Point

11.4°C

Today’s Hourly Humidity

Today’s Hourly Pressure

14-Day Trends

Thu
4 Jun
84% hum
998 mb
Fri
5 Jun
74% hum
1014 mb
Sat
6 Jun
83% hum
1006 mb
Sun
7 Jun
78% hum
1022 mb
Mon
8 Jun
80% hum
1016 mb
Tue
9 Jun
73% hum
1019 mb
Wed
10 Jun
80% hum
1011 mb
Thu
11 Jun
72% hum
1018 mb
Fri
12 Jun
83% hum
1016 mb
Sat
13 Jun
76% hum
1016 mb
Sun
14 Jun
83% hum
1016 mb
Mon
15 Jun
77% hum
1021 mb
Tue
16 Jun
69% hum
1020 mb
Wed
17 Jun
67% hum
1024 mb

Humidity Chart

Pressure Chart

When forecasts change between updates, it is commonly driven by small shifts in storm track or blocking position. The links below give stable context that helps you read those changes.

How to interpret confidence

For how forecast reliability changes with lead time, see Forecast Confidence. For transparency on how WeatherEngland sources and updates data, see Methodology.

Background guides

Glossary support

Start with the Weather Glossary. Useful terms for this page include Isobar, Pressure Gradient, Relative Humidity, Dew Point, Anticyclone, and Depression.

Nearby Cities — Pressure humidity

Portslade
Brighton and Hove · 2.2 km
Hove
Brighton and Hove · 2.7 km
Southwick
West Sussex · 3.5 km
Brighton
Brighton and Hove · 4.4 km
Preston
Brighton and Hove · 4.8 km
Shoreham-by-Sea
West Sussex · 5.5 km
← Portslade-by-Sea Overview

FAQ

What is the air pressure in Portslade-by-Sea today?

Atmospheric pressure in Portslade-by-Sea is currently around 998 mb. It helps describe the broader set-up, while cloud, fronts and local effects still decide the day-to-day detail. As the period goes on, the barometer tends to lift, supporting a more settled background pattern at times.

What counts as high or low pressure in the UK?

As a rough guide, the low 1020s (around 1020 mb–1024 mb) tends to be a more settled signal, while the low 1000s (around 1000 mb–1004 mb) more often points to Atlantic influence. The overall pattern matters more than any single reading.

How does pressure affect wind in Portslade-by-Sea?

Wind strength is driven mainly by the pressure gradient — how quickly pressure changes over distance. Tightly packed isobars usually mean stronger winds; a slack pattern often allows lighter winds, regardless of whether the headline pressure is high or low.

Does low pressure always mean rain in Portslade-by-Sea?

No. Low pressure increases the chance of changeable weather, but the wettest rain bands can miss your area entirely depending on where fronts set up.

What does humidity mean for comfort in Portslade-by-Sea?

It reflects how much moisture the air is holding compared with its maximum. Higher values can favour haze or low cloud, especially when winds are light. Moisture levels are broadly seasonal, with the ‘feel’ of the air changing mainly with temperature and wind strength.