Clyde windsurf & SUP

SUP or windsurf at
Castle Semple Loch

We mostly coach on our great local loch. It is called Castle Semple Loch and it’s at Lochwinnoch. 

It is big enough to have a variety of conditions but small enough to be super safe

What we do


If you are 16 or over and no matter what fitness level, we can teach you to have fun and stay safe on a SUP


Our Loch is a gorgeous place to spend an evening.
We also travel to amazing local spots. We run a club night coaching plan through the year


If you want to take it to the next level, we run Touring & Race SUP training.
It is a great way to get fit as well.

Learn to Windsurf courses

We run courses for both adults and children
(10 yrs upwards)

Junior Windsurfing Club

We run a junior club night throughout the season with coaching included

Adult windsurfing club

We run a adult club night throughout the season for competent windsurfers

Learn to SUP lesson

We will spend two hours on the water, and teach you the techniques, that will make every SUP trip fun & safe. 


Paddling straight
Standing up


Getting on the water
Weather & Tides
Self Rescue
Trip planning

Learn to windsurf Course

We will spend two days on the water  and teach you the techniques and safety that will make you a competent windsurfer.  


Getting started
Sailing in different winds and directions
Steering and Turning


Getting on and off the water
Weather & Tides
Self Rescue

Our location

We are here

Castle Semple Visitor Centre and Country Park,
Lochlip Road,
PA12 4EA

See the:
Visitor Centre directions page

We are on the road from glasgow to largs

Our new compound is the very last one next to THE loch

Follow the red line from the Car Park to us 🙂
where do i buy stuff

Favourite Shops


Great local selection of boards and kit that you can demo. Based near Falkirk.
Emma who runs it could not be more helpful.


Glasgow based company that makes excellent dry-bags, drysuits, wetsuits and more.
Tough and extremely good value kit.


Originally we knew them as a Windsurf company but they now also hire and sell paddle boards. They do a very useful repair service for boards & sails.

You find the strangest things floating down rivers…

Plastic pollution

A SUP board is the perfect place to collect plastic from the water that you are enjoying

Paddle Against Plastic is a British initiative run by Cal Major to inspire positive environmental changes

Happy 40th Birthday

Formed in 1981, and having been run by many volunteers over the years, the club is in a great place. It is the biggest club in the country, and still feeds the most junior windsurfers onto the Scotland Squad. Some of them go on to join the GB squad.

  • The new Compound is now finished & the Beach will be worked on this year
  • The Juniors have had two Covid practice events, and we can safely start activities in the spring
  • Adults are keen to get back on the water as well 🙂
  • We will be running adult windsurfing courses again this year.
  • We ran many SUP courses last year, and we have a new fleet of boards coming in March, to make 2021 an even better year
  • We have 3 SUP events planned for this year and also day trips for Touring and Surfing.
Thank you to everyone that has worked so hard to make the club what it is today. 
Now it is time to get back on the water and have some fun. Probably worth getting fit now 😮

See you all in April (Hopefully)

Covid Restrictions

Level 4 COVID Restrictions, (Renfrewshire), mean that most organised Windsurfing and SUP activities are not yet  started for the year. 
Read the RYA Sailing guidance for what you can do under the current conditions.
If you want to read more details about our operating procedures then please reference our Safety Management System site