I’ve GOT to start reading surf reports! Also, I think I’m becoming spoiled living on Kauai and surfing nearly every day. The last two days have been “junk”. Now if you’d have asked me 4 months ago, I would have been stoked about my surf experiences. After all, I caught a few good waves and rode my board for more than just a few seconds; two things that were not very easy when I started surfing back in July. Minor disclaimer: yes, I tried surfing a handful of times (<10) last summer when I was here, but I didn’t own a board and the frequency of my surfing was so irregular that I don’t think it counts.
In any case, the conditions the last two days have been too windy for ideal surfing. However, I still have the mindset that I need to get out there every day because, 1) I’m learning and need to get out there as often as I can for practice and 2) I can… and not everyone is so fortunate. In fact, in less than 3 week, I won’t be able to as my season on Kauai is about to be traded in for the ski season of Utah. But this post is going to be about reading surf reports and how that affects surf conditions… at least from my novice perspective.
Today’s surf report looked like this on Surfline.com:
I’m still learning how to read these reports, but here’s what I know so far. (And readers if you want to share more about reading these reports I’d love to hear what you find important or helpful!)
The top set of data shows the height of the waves throughout the day. Now here in Hawaii we have a different standard by which we measure the waves. Whereas most of the world measures waves based on their height when the surfer looks backward at the wave they are about the catch, here in Hawaii the waves are measured by the height on the backside of the wave. What’s the difference? This picture demonstrates:
As you can see the Hawaiian standard is about half the height of what the rest of the world would measure. I’m not completely sure if Surfline takes this measurement variation into account, but the reported height for today’s waves (1-2 ft) seems to be the norm for my break at Leftlefts and based on what I always seem to ride on these days; I believe it refers to the Hawaiian standard.
The next set of data is what made today’s surf sesh junk. This is the wind report. Wind is tricky. It can make conditions better if coming in the right direction at an ideal speed. I’m still learning about this, but I THINK the best conditions would be a slight offshore wind. This is when the wind is blowing off the shore out to sea. This helps to hold the face of the wave open a little longer so its is usually easier to ride those waves. Slight trade winds are also fine, but cause they don’t affect the shape of the waves too much. No wind is also nice because it allows for “glassy” conditions. This is when the water is like glass and you can easily see into it. (This is also fun because then when you catch a wave you can sometimes see the tropical fish swimming below you!)
However, this report shows strong (ish) winds. I went out around 9-10 am. At that time the winds were blowing 9 kts. This is too much wind. Of course it can get windier, but when the waves are already somewhat small (remember 1-2 ft swells as reported in the first data set), 9 knots of wind disturbs the waves. It makes the water choppy and this changes the direction of the ocean’s energy in the shape of the waves.
To illustrate this phenomena, I’ll post two pictures. This first drawing shows me at Leftlefts (a reef break near a rock pile) on a calm day. Notice the break is predictable because the ocean’s energy creates a wave that consistently comes from the same direction.
This next picture shows conditions on a windy day.
Even if the wind comes from the same direction, it has disturbed the water enough that the energy in the form of waves breaks on the rock pile from varying directions. This makes it harder to read when a wave is going to be good to catch. I’ll spend most of my surf sesh sitting on the board rather than riding it. Sometimes, I’m happy to just get out on the water and enjoy the gorgeous backdrop of Kauai… but as I mentioned, I might be getting spoiled. Sometimes I want consistent, surf-able waves.
The last graph on the surf report show the high and low tides. As I mentioned I was surfing around 9-10am. This is during a rising tide according to this graphic and I prefer to surf during rising tides. Tides can greatly affect the surf as well, but that’s another topic for another day. 😉