A magic wand would be the right tool to fix the weather. The wind has been relentless and despite odd periods of calm, mostly early in the mornings, there has been reasonably good visibility in between the patches of red tide.
Sadly this weekend is again going to be dry as the window of light wind is really small early on Saturday, and then it howls again until Tuesday. Wednesday and onwards next week do look like good diving days so if you are up for a weekday dive get in touch.
The sea swallow, Glaucus atlanticus, is a type of pelagic nudibranch. Pelagic means it lives in the open ocean, and being a nudibranch makes it a member of the phylum Mollusca. They are also called blue dragons, blue sea slugs, and a few other similar names. Because of where they live, these striking creatures are not frequently seen, so we were lucky to encounter a few of them after a dive at Batsata Maze in the south western part of False Bay, just south of Smitswinkel Bay.
The blue patterned side of this nudibranch that is visible when viewed from above is actually its underside. The top surface of the animal, which points down, is counter-shaded (like a great white shark). It is a greyish silver colour to blend in with the surface of the sea when viewed from underwater.
Sea swallows suck air into a gas-filled sack inside their bodies, for buoyancy. They prey on blue bottles (also called Portuguese man o’war) and retain and concentrate the blue bottles’ venom in their bodies for use against their own enemies. This makes them extremely venomous with the potential to sting badly.
Luckily the intrepid Carel leaped into the water to scoop one into a cup and we could all take a closer look (don’t touch!) on the boat and get some photographs. Afterwards, our visitor was returned safely to the ocean.
They are widely distributed through many of the world’s oceans, and sometimes wash up on the beaches in False Bay. They are unusual, but not earth-shatteringly rare. If we were more social media savvy we would have managed to use this sighting to manufacture the kind of hysteria generated by that facebook page whose title expresses an intense and profane love for “science“, or a few other media channels. But we’re not, so you get this blog post!
Sunday: Boat or shore dives, conditions dependent!
We have had terrific conditions all week and have been taking full advantage. False Bay is cleanish and warmish. Visibility has varied from site to site but the bay is full of life. On Tueday we spent our surface interval time photographing sea swallows at Batsata Maze. Wednesday’s surface interval was spent filming giant short tail sting rays at Millers Point, and today we were fortunate enough to have two orcas swim by close inshore whilst the divers were on the SAS Pietermaritzburg this morning. Who knows what we will see tomorrow!
Sadly the diving today was somewhat overshadowed by the raging fire that descended on Simon’s Town with the westerly wind, despite the best efforts of many firefighters. Watching from the water you could see the speed at which the fire traveled and I doubt anything other than a thundershower was going to slow it down. On the run back into Simon’s Town we went through really thick smoke.
The weekend, however, does not look too rosy. At cowsharks this afternoon the swell was quite noticeable and although it stays at 3 metres for most of tomorrow, the forecast is for 5-6 metres on Saturday. It seldom reaches the height in the forecast but even at 4-5 metres diving becomes less than great. Surge and low viz are on the cards. I think there will be a better than good chance that Sunday will be semi-decent so I will provisionally schedule diving, either from the boat or perhaps a shore dive or two… Text me if you want to join and I’ll keep you posted.
We had planned not to launch last weekend based on the forecast. The conditions changed dramatically and on Sunday we ventured out for a film project and must admit to being pleasantly surprised by the good visibility. After filming the bits that needed doing, we went to Outer Photographer’s Reef, where Georgina took the picture above.
The week’s wind has helped improve this and False Bay looks really clean right now despite the 5 metre swell that was forecast for today.
This weekend we should have an acceptable amount of swell, light winds and some sun. Windguru has only used their blue crayons this weekend as opposed to the purples they used a couple of weeks back, and we like the shades of blue. On Saturday we will launch from Simon’s Town jetty at 8.30 and go to Omega Reef, I have been told that it is stunning and have not yet seen it. The second dive at 11.00am will be to Atlantis Reef. If the swell has lingered we will dive the SAS Pietermaritzburg instead.
On Sunday we will shore dive at either Long Beach or A Frame at 10.00am. Text or email me to book a spot on either day.
Text me or reply to this mail if you want to dive.
We did not manage any diving last weekend as the boat was scheduled to launch in Gordon’s Bay for the Aqualung Fun Day on Saturday but we were cancelled on Friday evening because of bad visibility on that side. Sunday was a howling south easter day so no diving was done.
This weekend has a forecast similar to last weekend but with a few differences. The 3 metre swell that is in every forecast does not appear to be around as the Atlantic wave buoy registers 2 metre swell at the moment and False Bay was relatively flat today. The wind is another matter… There is however less wind on Saturday, so an early launch in Hout Bay is on the cards. We will dive the BOS 400and Tafelberg Reef. Sunday will be too windy for my kind of diving.
Thanks very much to Jerrel for this week’s photo – taken two weekends ago on a dive to Roman Rock.
There is still space on the Mozambique trip (28 June – 4 July). Remember to book your flights if you’ve decided to join us – get more info from Clare. That is how you will confirm your spot.
Last Friday we went out in False Bay, and Georgina took this lovely close up of a black nudibranch – thanks for sharing it with us! The visibility wasn’t fantastic, though, and the south easter was a bit strong, which influenced our diving decisions for the rest of the weekend.
We chose to dive out of Hout Bay last Sunday and had really good conditions with 10-12 metre visibility almost everywhere and 15 degree water. We dived below the Sentinel and on the BOS 400, where Christo and Laurine were buzzed by a giant short tailed sting ray. Can you believe it! There were also dolphins just off the harbour wall and they were happy to turn around and say hello as soon as Laurine hit the water with a snorkel. The week has not been all that diver friendly, however, and rain and howling winds have kept us off the water.
This weekend is one of those really hard to call weekends, as the forecasts vary so wildly you would be forgiven for thinking you were looking at the weather in different cities. Most weather and swell forecast sites claim some south easterly wind with a small swell from the south west. Other sites claim slightly more swell but with a 20 second period from the south. A southerly swell rolls straight into False Bay and gives diving in surge a whole new meaning. Tough call.
So my guess is Saturday will be better underwater than Sunday, but Sunday will be better on the surface. I would like to launch both days, but because the forecast is so uncertain I’ll have to make a call for Saturday late tomorrow afternoon. We will plan to dive Roman Rock at 9.30 and at 11.30 we will drop at Ark Rock and head off towards Photographer’s Reef to see what we can find on the way. You will be very surprised at what there is to see away from the known dive sites.
If we can’t launch on Saturday, I’ll check conditions for Sunday, and we will launch if we can. Sound confusing? Yes. Just email or text me if you feel like a dive this weekend, and I’ll try and make it happen safely and enjoyably.
There is also the possibility that Dungeons will produce a decent wave sometime in the next few days, and that is something to see.
I went off hunting after that, and found and photographed another red sponge nudibranch (above) that upon closer examination turned out to be two: there is one just above the top shell near the middle of the photo, and another on the right hand side pointing downwards. You can just see that there are small, darker spots on their bodies.
Next time I spot one I’m interested to see whether they leave marks in the sponge where they’ve been feeding. They are very hard to spot, though!
I’m not sure why I haven’t written about Roman Rock before. I’ve actually done four dives on the main reef, the first in 2010. The pictures in this post are from more than one of the dives – I’ll group them together, and you’ll be able to see by the water colour which dive is which.
Part of the dive is along high walls that are reminiscent of Atlantis Reef, further south. There are deep dead-end passages in between the rocks, wide enough to swim through (or drive a car through), and the rippled sand looks like a white carpet or a runway. In the middle of nowhere you will come across a ladder; it’s been there since the first time I dived Roman Rock in 2010. Your guess is as good as mine.
The site is suitable for Open Water divers, as the maximum depth one can attain while staying adjacent to the reef is about 18 metres. There are several pinnacles and shallower plateaus that are suitable for deeper safety stops. It goes without saying that each diver must have a surface marker buoy – the site is a relatively short boat ride from False Bay Yacht Club, but offshore nonetheless and there may be boat traffic, depending on where the current takes you.
The weekend does not look all that rosy. A rather large swell is forecast and a little rain for tomorrow and Saturday, and then a fair amount of south easter for Sunday, but it blows later in the day so this is the plan:
All launches will be from False Bay Yacht Club. As usual, text me if you want to dive. We have Advanced students for Saturday and need to start early on Sunday as the wind picks up after lunch. These launches are subject to a final call early on the day as the swell may or may not affect us. It is always a sign of bad weather to come when big boats seek shelter in False Bay; at present two large ships have come into the bay, presumably to hide from the wind and swell.
We have had a good run of late and last weekend we were out on the boat on Sunday, Monday and Tuesday. The weather was not nearly as bad as the forecast so we had some good diving, as well as encountering a large number of extremely frisky whales. It was also good to see some new and old faces on the boat. The viz was not spectacular, but there was not too much wind or swell. Today we had 4-5 metre visibility at Long Beach.
We had really good mileage out of the white shark encounter two weeks ago and were fortunate to have the story run on a few local blogs, from which the Sunday Times got hold of it, and that led to a short radio interview on Cape Talk on Monday morning. That kind of exposure doesn’t come around very often, so thank you False Bay, Christo, Craig, the Russians and of course the shark. If you haven’t heard what happened, click here.
There are two red sponge nudibranchs in the photo above. See if you can see them: a bigger one just above the snail, and a smaller one to the right of the image. They are perfectly camouflaged!
Dates to diarise
The next ScubaPro Day is on Saturday 26 October. On that day we will be spending some time in airports on our way back from the Red Sea, so unfortunately our boat won’t be participating. If you’re keen to do some cheap boat dives and maybe try out some ScubaPro gear, however, diarise the date. More information will be provided in the next few weeks.
The next Cape Town Dive Festival is on 2-3 May 2014. More information on that will be revealed in the coming months, I imagine.
Hi divers We had really good conditions last weekend with Saturday being the best. We dived Photographer’s Reef and Roman Rock. Sunday was good at Photographer’s Reef and the Brunswick, but you could see signs of red tide coming and by Monday it was all over False Bay. On Tuesday the swell and the red tide messed up the diving. There are still patches of red tide about but it is not widespread, so odds are good for a diving weekend.
Long weekend plans
This weekend, Friday and Saturday are the days I believe will be best for diving. Sunday will be too windy. There is not much swell about but there is currently a south easterly wind which comes straight into False Bay. My guess is that we will be better off launching from Hout Bay. The sea temperature in False Bay is around 14 degrees, as is the Atlantic, but the weather buoy off Kommetjie shows a temperature drop which usually indicates improving viz. Either way, the plan is to launch at 10.00am and 12.30pm. Neither days will be dives deeper than 18 metres as I have Open Water students on the boat. If you want to get wet, text me and I’ll put you on the list.
Free dives for ladies on Friday
Being Women’s Day on Friday, our lady divers will be given a free boat dive to say thanks for never understanding that men don’t need veggies! Cake, yes, any time. But no veggies. One free dive per lady, and kit rental is not included. First come first served! All of you, ladies and gentlemen, must have an up to date MPA permit please. Go to the post office and get one, and bring it with you on the boat.
I will be out of action on the weekend of 24-25 August. Luckily for you, if you want to dive, OMSAC are holding a Treasure Hunt, and you can join one of the boats going out on that day. We went two years ago and it was great fun. The event details are here. If you need a heart to heart and some encouragement to be adventurous, let me know!