River Levels
River Levels

Frog Island Tidal Sluice FD Monitoring Station

Current River Level


At 5:00pm, Friday 14th June BST
(4:00pm, Friday 14th June GMT)

Within the usual range for this location

Rising, 0.120 from previous measurement at 4:30pm, Friday 14th June BST

Important! The levels for this location are measured relative to sea level, not relative to the riverbed. The levels shown here do not, therefore, necessarily represent the actual depth of the water.

Flood Warning Areas Covering Here

Tidal Thames from The Mardyke to Barking Creek

No current or recent warnings.

Tidal Thames in the boroughs of Havering, Barking and Dagenham, and Newham

No current or recent warnings.

Other Nearby Flood Warning Areas

River Beam at Dagenham

No current or recent warnings.

Tidal Thames from Erith High Street to Thamesmead

No current or recent warnings.

Tidal Thames riverside from Dartford Creek and The Mardyke to the Thames Barrier

No current or recent warnings.

Seven Day Level Chart

Long Term Level Chart

Darker blue shaded areas on long term data indicate maximum and minimum levels for the date (you may need to zoom in closer to see them).

Long term data may have gaps where the API data was not available.

Download long term data as csv

Note: CSV data will include any outlying values that have been ignored by our graphing system as probably erroneous (eg, because they are ridiculously high compared to the values either side of them). It is your responsibility to filter these out if necessary.

Important! If you are planning to retrieve the csv data automatically, you must read and understand the limitations on the data and its availability.

Location and Technical Data

  • Monitoring Station: Frog Island Tidal Sluice FD
  • Watercourse:
  • Nearest Town/Village:
  • Local Authority: Havering
  • Ceremonial County: Greater London
  • Coordinates: 51°30'28"N 0°10'26"E (51.507967,0.174152)
  • OS Grid: TQ5098081023 (550980,181023)
  • Mapcode (Local): GBR SP.LL6
  • Mapcode (Global): VHHNL.YCXB
  • Open Location Code: 9F32G55F+5M
  • Maidenhead Locator System: JO01cm01
  • Environment Agency Location ID: 5562TH
  • Environment Agency Gauge ID: 5562TH-level-stage-i-15_min-mAOD
  • Operational Area: Tidal Thames
  • Catchment Area: Thames Transitional & Coastal
  • UK Hydrometric Area: Essex Rivers Group
  • Environment Agency Region: Thames
  • Level Datum: Above Ordnance Datum (AOD)

Please note: Geographic coordinates may reflect the access point for the gauge, and not the precise location in the watercourse that it is taking readings from.

The usual range of the Frog Island Tidal Sluice FD Monitoring Station is between -1.41m and 2.34m. It has been between these levels for 90% of the time since monitoring began.

The typical recent level of the Frog Island Tidal Sluice FD Monitoring Station over the past 12 months has been between -1.44m and 3.12m. It has been between these levels for at least 150 days in the past year.

Nearby Monitoring Locations

There are no other monitored rivers nearby

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