Coastal weather guides

Understand the conditions before you go

Practical explanations of the signals Seyva checks, written for UK sea swimmers and paddleboarders.

💨 How much wind is too much for paddleboarding?Why there is no universal number, how direction changes the risk, and why Seyva starts cautiously.🌊 What is the best tide for sea swimming?How tide height, timing and currents affect entry, exit and the shape of a swim.💧 How to check sea water quality before swimmingWhat bathing-water classifications and overflow information can—and cannot—tell you.🌡️ Sea temperature and wetsuit guideHow to think about cold water, acclimatisation, clothing and time in the water.

Go from learning to a live outlook

Use the activity hubs to apply these ideas to a real forecast. Seyva combines weather, tide times, sea temperature where available and water-quality checks, then shows possible activity windows using cautious starter settings.

Sea swimmingConditions to check before a coastal swim.PaddleboardingWind, tide and session-planning guidance.Coastal forecastsChoose a permanent UK location page.

Written and reviewed by Ollie BartlettFounder of Seyva and a sea swimmer and paddleboarder based near Worthing. Reviewed 14 September 2026. Seyva is a planning aid, not professional safety advice.