Water status & red flags for UK rowing clubs
Conditions on the water can change fast — stream, wind, tide, visibility and cold water. UK rowing clubs use a water status to tell members, at a glance, whether it’s safe to go out. Here’s how that works on different waters, and what “red” usually means.
Why clubs use a water status
A clear, club-wide status removes guesswork on the bank. Instead of individual crews deciding for themselves, the club’s safety adviser, captain or duty officer sets a single signal — commonly a traffic-light system of green, amber and red (and sometimes “closed”). It is informed by official sources and the club’s own safety plan, written under British Rowing’s RowSafe guidance.
Red boards on inland rivers
On the non-tidal River Thames and many other managed rivers, the Environment Agency displays stream-condition boards at locks — typically green, amber (yellow) and red. Red boards indicate that the stream is strong and there is a strong recommendation against navigation, particularly for small, unpowered or less powerful craft. Many clubs respond to red boards by suspending outings, or restricting them to experienced crews with safety cover, in line with their own rules.
Boards can change between locks and through the day as flow rises and falls, so clubs check the current state before and during sessions rather than relying on yesterday’s call.
The Tideway (Tidal Thames)
The tidal Thames is navigated under the authority of the Port of London Authority (PLA). Conditions are shaped by the tidal stream, wind over tide, the wash from larger vessels, visibility and water temperature — and they can deteriorate quickly. There is no single national “Tideway flag”; instead, clubs assess conditions and set their own status, often displayed on a board at the boathouse, alongside local requirements such as experienced cox/steers, minimum crew experience or a safety launch.
Estuaries, lakes and the coast
On open water — estuaries, reservoirs, the sea and surf-ski/ocean paddling — wind strength and direction, swell, fog and cold-water shock become the dominant risks. The principle is the same: agree the thresholds in advance, set a clear status, and make sure everyone can see it before they launch.
What the colours usually mean
- Green — normal conditions; boating as usual within club rules.
- Amber — caution; restrictions may apply (experienced crews only, safety cover, no novices/juniors).
- Red — do not boat, or only as your club’s safety plan specifically allows.
- Closed — no boating at all.
Exact thresholds and what each colour permits are set by each club. Always follow your own club’s safety plan and current official sources — British Rowing RowSafe, the Environment Agency river conditions, and the PLA on the Tideway.
This guide is general information, not official safety guidance or a substitute for your club’s risk assessment.
Links to related pages:
Run a green / amber / red light system for your club
Set a club-wide water status with one tap, and everyone sees it across the app and on the boathouse board.
- ✓Green, amber, red or closed — with an optional note (e.g. “stream-on, red boards”).
- ✓Red or closed automatically suspends check-outs across the whole club.
- ✓A live boathouse board and the weekly digest show the status — including each day’s status over the week.
- ✓Email every member when the status changes — you confirm before it sends, and members can opt out.