The following websites help with assessing weather conditions for rowing
RNLI weather station at end of Southend Pier
http://skylink-pro.com/remote-index.php?domainname=southendlifeboat.org&keyword=rnli
Island Yacht Club Weather Station
http://www.islandyachtclub.org.uk/weatherstation/weatheriyc.html
Thorpe Bay Yacht Club Weather Station
http://www.tbyc.org/weather-station/
Port of Londons website showing Tidal Flow warning flag
http://www.boatingonthethames.co.uk/