Forte de São Tomé is a convenient surf spot located not far from the capital. While the historical scenery is nice to look at, the surf here tends to be just average. You can find some waves, but they often come in dribbly and can be flat at times.
The surf works best with swells coming from the south or southwest. It can handle swell sizes of about 2 feet (0.6 meters), and the waves mostly break over boulders. The right point waves are usually what you'll find here. For the best conditions, aim for low to mid or high tides, and keep in mind that south or southwest winds are preferable. This spot is alright for intermediate surfers, so if you're looking to refine your skills, it can work for you.
Just remember, the waves need a good wrap to get going, so the more south the swell direction, the better it typically gets. Keep an eye on the conditions, and you might find some fun sessions at Forte de São Tomé.