River Levels
River Levels

Portland Monsoon Drain Bridge Monitoring Station

Current River Level


At 7:00am, Saturday 20th July BST
(6:00am, Saturday 20th July GMT)

Within the usual range for this location

Rising, 0.310 from previous measurement at 7:00am, Friday 19th July BST

Flood Warning Areas Covering Here

West coast of Dorset

No current or recent warnings.

Other Nearby Flood Warning Areas

Portland Harbour at Osprey Quay

No current or recent warnings.

Portland Harbour at Ferry Bridge

No current or recent warnings.

Dorset coast at Chiswell

No current or recent warnings.

Weymouth Harbour at Weymouth Town

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: Portland Monsoon Drain Bridge
  • Watercourse:
  • Nearest Town/Village: Portland
  • Local Authority: Weymouth and Portland
  • Ceremonial County: Dorset
  • Coordinates: 50°34'14"N 2°27'38"W (50.570736,-2.460592)
  • OS Grid: SY6747874656 (367478,74656)
  • Mapcode (Local): GBR PY.H1KT
  • Mapcode (Global): FRA 57QK.K5H
  • Open Location Code: 9C2VHGCQ+7Q
  • Maidenhead Locator System: IO80sn46
  • Environment Agency Location ID: 44136
  • Environment Agency Gauge ID: 44136-level-stage-i-15_min-m
  • Operational Area: West Dorset Rivers
  • Catchment Area: Dorset
  • UK Hydrometric Area: Frome Group
  • Environment Agency Region: South West

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 Portland Monsoon Drain Bridge Monitoring Station is between 0.01m and 1.32m. It has been between these levels for 90% of the time since monitoring began.

The typical recent level of the Portland Monsoon Drain Bridge Monitoring Station over the past 12 months has been between 0.04m and 1.18m. It has been between these levels for at least 151 days in the past year.

Nearby Monitoring Locations

There are no other monitored rivers nearby

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