Portsmouth water level

Name: Portsmouth water level (Environment Agency)
Creator: Environment Agency
License: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/

Tidal gauge, Hampshire, United Kingdom

Directions

Latest reading

Water level

2.54m Up 0.54 m over the last 24 hours

Measured 19 Oct 2026, 22:00 BST (59 min ago)

History

7 days 30 days

Water level

What this means

The latest water level reported for Portsmouth is 2.54 m. There is no published reference for this tidal gauge yet, so we can't say whether that is high or low for the season.

The water is rising: up 0.54 m over the past 24 hours. Over the past 30 days it has moved between 0.76 m and 5.02 m.

Over the past seven days the change adds up to +0.04 m.

The agency publishes no normal range for this gauge yet, so we show the trend only. How to read levels

Key numbers

Lowest and highest in 30 days: 0.76 m – 5.02 m
Lowest and highest in 12 months: 2.83 m – 3.14 m

Weather at the gauge

Rain in the last 3 days: 6.0 mm. Rain that falls upstream can take hours or days to show up at a river gauge.

19 Mon 14° 9° 0.4 mm, 90% Wind 19 km/h

20 Tue 13° 10° 9.2 mm, 100% Wind 20 km/h

21 Wed 13° 8° 7.2 mm, 90% Wind 39 km/h

22 Thu 14° 8° 10 mm, 99% Wind 37 km/h

23 Fri 14° 9° 14 mm, 99% Wind 53 km/h

24 Sat 14° 7° 13 mm, 73% Wind 28 km/h

25 Sun 17° 12° 3.8 mm, 65% Wind 39 km/h

Forecast: Open-Meteo

Sunrise 07:34 AM Sunset 06:06 PM Daylight 10 hr, 32 min First quarter 62%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
BrowndownRiver gauge, River Alver	0.24 m	Normal	+0.03 m	4.3 km
Salterns PSRiver gauge	−1.18 m	Normal	±0	5.0 km
North Fareham weirRiver gauge, River Wallington	0.12 m	Low	+0.01 m	7.9 km
Monkton Mead PSRiver gauge	0.40 m	Very low	+0.02 m	8.4 km
Monkton MeadRiver gauge, Monktonmead Brook	0.40 m	Normal	+0.02 m	8.6 km
St JohnsRiver gauge, Monktonmead Brook	2.53 m	Very low	±0	9.3 km
West StreetRiver gauge, River Lavant	7.07 m	Normal	±0	10 km
DenmeadRiver gauge, River Wallington	33.16 m	Normal	−0.02 m	11 km

Questions and answers

What is the water level of Portsmouth today?

On 19 Oct 2026, 22:00 BST, the water level was 2.54 m. Up 0.54 m over the last 24 hours.

Is Portsmouth rising or falling?

Up 0.54 m over the last 24 hours. Up 0.04 m over the last 7 days.

Is the level of Portsmouth normal?

The agency publishes no normal range for this gauge yet, so we show the trend only.

How often is this data updated?

The Environment Agency publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

Where does this data come from?

The values come directly from the Environment Agency, the official operator of this gauge, and are published under the Open Government Licence v3.0. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: Environment Agency
Station code: ea:E71824
Coordinates: 50.80229, -1.11119 (WGS84)
Vertical datum: station datum
Update interval: every 15 minutes
Licence: Open Government Licence v3.0. Contains Environment Agency data licensed under the Open Government Licence v3.0

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	2.54 m	2026-10-19 21:00	Provisional

Download

Embed this gauge

Add a live card for this gauge to your website. It updates on its own and links back here.

<iframe src="https://nivelmap.com/embed/2080?lang=en" width="360" height="230" style="border:0;max-width:100%" loading="lazy" title="Portsmouth water level"></iframe>

How to cite

Environment Agency: Portsmouth (ea:E71824). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-kingdom/hampshire/portsmouth-e71824

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer