Snorkelling and winter sound like two words that don't belong together, but here in Cape Town, winter is actually one of the most consistent times of year for flat-calm, turquoise, crystal-clear water in False Bay.
Below, I'll share five reasons why the winter months, from May to September, can be the best time to dive into the Great African Sea Forest.
1. Let's Start with the Weather
I'm not going to try and sugarcoat things—the weather is definitely cooler in winter than it is in summer. Typical Cape Town winters are characterised by stormy cold fronts, huge swells rolling in from the Southern Ocean and driving rain.
While these conditions certainly do occur, what most people don't realise is that in between the storms are long stretches of calm, windless, bluebird days that are perfect for getting in the water. It's these weather windows that we watch closely before every snorkel experience.
2. The Geography of the Cape Peninsula
Cape Town sits on a 52 km-long peninsula that stretches south to Cape Point. This unique geography acts as a giant natural barrier, protecting much of the False Bay coastline from the powerful Southern Ocean swells.
The stretch of coastline between Simon's Town and Cape Point, where we usually run our Kelptown snorkel experiences, is often surprisingly calm—even when huge swells are pounding the Atlantic coastline.
Winter winds also tend to blow from the north-west, which means they're offshore in False Bay. Offshore winds smooth the ocean's surface, creating ideal snorkelling conditions.
3. Crystal-Clear Water
Fortune favours the brave.
One of the biggest rewards for venturing into the ocean during winter is the incredible visibility. Prevailing north-westerly winds calm the surface, blowing surface waters offshore, causing upwelling of crystal-clear water. Visibility of 10–15 metres is not uncommon, allowing you to truly appreciate the scale and beauty of the Great African Sea Forest.
Yes, the water is cooler—usually around 13°C—but don't worry, we've got you covered with warm 5 mm wetsuits with hoods to keep you warm and toasty while you explore.
4. Escape the Crowds
Cape Town is a summer hotspot. Beaches are packed, parking lots are full and popular attractions can feel busy.
Winter is the complete opposite.
Empty beaches, quiet roads and, more often than not, you'll have the entire snorkel site to yourself. It makes the experience feel far more immersive and allows you to connect with nature without the crowds.
5. Incredible Underwater Wildlife
Winter is a beautiful time to explore the wildlife of the Great African Sea Forest.
With the improved underwater visibility, it's much easier to spot the incredible diversity hiding among the kelp. Expect vibrant reef fish, colourful sea stars, octopus, shy sharks, nudibranchs, and healthy kelp forests stretching as far as you can see.
Every snorkel is different, but winter often offers some of the best opportunities to truly appreciate just how alive Cape Town's underwater world really is.
Winter may not seem like the obvious time to go snorkelling, but for those willing to embrace the cooler temperatures, it can be one of the most rewarding seasons of the year. Fewer crowds, incredible visibility and a thriving underwater ecosystem make it a hidden gem that many visitors completely overlook.
