If the weather is not at it's best, or you just want to spot a few more things for your itinerary, then here is an excellent guide to help you.
The Castle itself is a trefoil shaped Gun Fort and is an architectural delight. Built under the instruction of Henry VIII to provide additional support to Pendennis Castle to protect the port and harbour of Falmouth and the Carrick Roads from invading Catholic forces after the Reformation.
St Mawes Castle is situated at the end of Roseland peninsular. The fort and castle are smaller than Pendennis and you can cover the castle and surrounding grounds in 2-3 hours.
There are no refreshment facilities onsite, but the local village of St Mawes is within walking distance with several cafes and restaurants.
The Castle is enclosed and suitable for a visit in all weathers, however the site is exposed and the right clothing will be needed when exploring the grounds and outer parts of the castle.