San Juan Surf Forecast and Surf Report

Alright, Rusty here. Let’s take a look at what’s on the table for San Juan over the next couple of weeks.

To be straight with you, this outlook is a tough one. The entire 16-day window is a battle with persistent onshore winds. The first recommendation doesn't even show up until September 4th, so we’re looking at a week of nothing but blown-out conditions before anything remotely surfable appears. That’s a long stretch of flat or messy water.

San Juan is a reef setup, expert territory, and it needs a good window to shine. The swell direction it loves is from the NNW, but for the first week, we've got strong winds from the NNE and N hammering it, with swell sizes ranging from 4ft to 8ft. The energy is moderate to strong, but it’s all junk. The wind is on it every day, making it unsurfable. The water temp is sitting at 75°, which is a touch warmer than normal for this time of year, so at least you won’t freeze while you’re watching it.

There’s a gap of several days with no recommendations. The first real chance comes on Thursday, September 4th. The wind starts to ease off, with a light breeze from the NNW. The swell is 5ft from the N with a period of 8 seconds, and the energy is moderate at 259. It’s still a cross-onshore wind, so the waves will have some texture, but it’s the first sniff of something that isn’t totally blown out. It’s marginal, but it’s a start.

The standout of the whole run is on Saturday morning, September 6th. This is the one. The wind turns glassy from the NNW, with a slight air. The swell is small, 4ft from the N, with a short 7-second period and weak energy (146). It’s not going to be big, but with glassy conditions, the waves will be clean and lined up on the reef. For an expert break, that’s a rare treat. This is the one to circle on your calendar. The catch is that the swell is short period, so it won’t have the push of a proper groundswell, but for clean, groomed reef waves, you take it.

After that, it trails off again. Sunday, September 7th, through to the end of the forecast, the winds swing back to cross-onshore, and the swell gets smaller, down to 2ft to 5ft. The period jumps to 13 seconds on the 6th afternoon, which is a long period groundswell, but the wind is choppy and cross-onshore, so it’s messy. The energy is moderate to weak, and it’s not worth the drive.

So, overall, a long wait for a very brief, clean window on Saturday, September 6th. If you’re an expert who loves a clean reef wave, that morning is your only real chance. The rest is best left for a session of watching the horizon.

Rusty

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