How-To Guide
How to read wind and tide for Cape Town surf
Most people do not need more forecast charts. They need to know what the numbers actually mean at the beach. This guide uses visual examples to explain how wind direction, tide movement, and wave height work together — so you can make a better surf or kite decision without second-guessing the data.
Wind direction — the most important number on the page
Wind speed tells you how hard it is blowing. Wind direction tells you whether the session is actually worth it. A beach can be excellent in moderate wind if the direction is right, and ruined in light wind if the angle is wrong.
OFFSHORE WIND
Wind blows from land toward sea, holding the wave faces clean and upright. Best conditions for surfers. Classic example: an early-morning SE wind at Bloubergstrand before it builds.
ONSHORE WIND
Wind blows from sea toward land, pushing directly into the back of the waves and creating chop. The most common reason a Cape Town session degrades by midday.
SIDE-SHORE WIND
Wind runs parallel to the beach, adding texture for surfers but creating the ideal kite lane. The Cape Doctor blowing SSE at Big Bay is a classic side-shore kite setup.
What the Cape Wave Check wind read actually tells you
When you open a spot page, the wind direction shown is the compass heading the wind is coming from. A southerly wind at Bloubergstrand — which faces roughly west — is coming from behind the beach. That is side-shore to slightly offshore, which is why Blouberg works for kiting in a south wind. Understanding the beach orientation is what makes the wind number meaningful.
Tide — how the same beach changes through the day
Tide affects wave shape, beach exposure, rip strength, and how safe a beach is to paddle out from. The same beach at low tide versus high tide can feel like two different spots entirely.
PUSHING TO HIGH ↑
Many Cape Town beach breaks improve as the tide fills in. Rip channels are less exposed and wave shape often improves through this phase.
FULL HIGH TIDE —
At full high the beach narrows and waves may dump heavily on sand. The tide is about to drop — note how long until the turn if the session looks good now.
DROPPING TO LOW ↓
Rip channels become more exposed. Some spots get shallow and shore-dumpy. Others improve as the bank or reef gets more defined. Know your spot's preference.
FULL LOW TIDE ↓
Reef and rock hazards most exposed. Some beach breaks go flat. The tide is about to turn and push — a good time to paddle out if the next few hours look promising.
Real example — reading a Cape Wave Check spot page
Here is how to interpret a typical set of conditions at Muizenberg:
Wind: 12 kn SE · Wave height: 0.8 m · Tide: Pushing to high · Verdict: Surf Good
The SE wind is side-onshore at Muizenberg, which adds some texture. But at 12 knots it is manageable, not destructive. 0.8 m is solid beginner-to-intermediate height at a gentle beach break. Pushing to high tide means the water is filling in and the bank will improve through the session. Result: worth going.
Wind: 28 kn SSE · Wave height: 1.2 m · Tide: Full low · Verdict: Skip
28 knots of onshore wind makes the faces messy regardless of height. Full low tide exposes rip channels and makes paddling out more demanding. The headline wave height looks promising but the wind and tide both argue against it. Result: skip or wait for the afternoon tide push.
Wave height — what the number actually means
Cape Wave Check shows wave height in metres from a marine model. It is a sea state estimate, not a precise measurement of what you will see at a specific beach. Here is a rough guide for Cape Town beaches:
0.3–0.6 m
Small. Beginner-friendly at Muizenberg. Minimal at more exposed beaches.
0.6–1.2 m
Waist to shoulder high. The sweet spot for most intermediate surfers at Cape Town beaches.
1.2–2.0 m
Solid overhead. Exciting at Kommetjie and Bloubergstrand for experienced surfers. Demanding for beginners.
2.0 m+
Heavy. South Peninsula and West Coast territory. Not suitable for beginners or casual sessions.
How surfers and kite surfers should read the same page differently
Surfers should weight wind direction and tide above all else. A clean 10 knot offshore wind with the right tide beats a messy 20 knot onshore day at double the wave height. Kite surfers should weight wind consistency, angle, and launch safety. The ideal kite setup often looks poor on a surf scorecard — strong, gusty, and side-shore — but is exactly what the kite needs.
The three live data visuals on every spot page
Each Cape Wave Check beach page shows three visual data components below the main conditions read. Here is what each one means and how to read it.
The wind compass rose
The compass rose shows a circular dial with N, NE, E, SE, S, SW, W, and NW positions marked around the edge. A blue arrow points outward from the centre toward the direction the wind is coming from. So if the arrow is pointing toward SE, the wind is blowing from the southeast.
Why does that matter? Because you need to know which way the wind is hitting the beach, not just its speed. A wind from the southeast hitting a west-facing beach like Bloubergstrand is coming in from behind, which is good — it holds the waves up. The same wind hitting a south-facing beach blows straight onshore, which messes up the wave face.
Reading the compass
Arrow pointing toward SE = wind from the southeast = check your beach's orientation to see if that is offshore, onshore, or side-shore. The compass does not tell you good or bad — it tells you the angle, which you match against the beach direction.
The wind direction text
The text read underneath shows “from SE” to confirm what the compass is showing. The compass is a visual shortcut — once you know your main beach faces west, you know you want the arrow pointing west or northwest for the cleanest offshore wind.
The tide graph
The tide graph is a line chart showing predicted sea level height over the next 24 hours. The horizontal axis is time, the vertical axis is height in metres, and the orange dot shows where you are right now.
The curve goes up toward high tide and back down toward low. What you want to know from the tide graph: is the tide filling in or dropping, when is the next peak or trough, and how much movement is there in the next few hours. More vertical slope means faster moving water, which can strengthen rip channels.
How to use the tide graph
Find the orange dot. That is now. Look at the curve heading to the right — is it going up (filling) or down (dropping)? If it is near the top, you are close to high tide. If it is near the bottom, you are close to low. The next peak or trough on the curve tells you how long until the turn.
Note: the tide graph uses a modelled sea level estimate from the marine forecast. WorldTides data is used where available for better accuracy.
The wave forecast bars
The three bars show wave height for three time windows: Now, Next 6h, and Next 18h. The taller the bar, the higher the expected wave height. The colour shows the surf suitability verdict — green for good surf conditions, orange for decent, red for poor or weather warning.
The forecast bars let you see at a glance whether conditions are improving or deteriorating through the day. Three green bars means it is consistent. A red bar followed by green bars means the morning session is better than the afternoon. Three dropping bars in height might mean the swell is fading — if you want a session, go earlier.
Green bar — surf conditions are good for this window. Go if wind and tide also line up.
Orange bar — conditions are decent but not ideal. Worth checking the full conditions before committing.
Red bar — poor conditions or weather warning active. Skip or wait for an improvement window.
How to use Cape Wave Check properly
Start with the homepage or a regional hub for a quick shortlist. Open the beach page you are considering. Read the Right Now verdict, then check the compass rose for wind angle, the tide graph for where you are in the cycle, and the forecast bars for how the next 18 hours look. After that, use the local guide lower on the page to sense-check the decision against crowd, access, and beach personality before you commit to the drive.
If you want a live comparison across multiple beaches at once, use the Cape Town surf dashboard or one of the regional hub pages.