Yellow Wind Warning: Storm Dennis

Storm Dennis is expected to affect SW England from 10am Saturday 15th through to 12pm on Sunday 16th February. Gusts of 60 to 70 mph coming from the west and southwest are likely across many inland areas and around 60-70 mph in coastal areas. We are also expecting high swells throughout much of the weekend, ranging from 7.0m to 8.5m. Due to the strong winds, heavy showers and tide levels it is likely that some coastal routes, sea front and coastal communities affected by spray and/or large wave.


Please take extra caution when passing a coastal area (Porthcressa Beach, Old Town Beach, Mermaid Car Park, the Garrison etc.) It is recommended that caution is exercised at least 2 hours either side of high tide due to the wave climate and high water levels. In addition to wave and sea over-topping, there may be a risk of flying debris. Where possible take alternate routes.


Hide Tides:

Saturday:  09:05 (5.25m) & 21:33 (4.93)

​Sunday: 10.01 (4.84m) & 22.36 (4.61)



The Council of the Isles of Scilly has deployed storm boards across St Mary's, and has sand bags ready to be used if needed. Our operational services will be doing additional checks throughout the weekend.


In an event of flooding the Council of the Isles of Scilly, the Emergency services, and the Environment agency will help where they can.


If life is at risk, CALL 999


If you require sandbags as a precautionary measure you will need to make your own arrangements. For more information on Sand Bags and Flooding safety please see here:


Publishing date: 
Tuesday, 11 February, 2020