San Juan Surf Forecast and Surf Report

Alright, Rusty here. Let’s have a look at what’s in store for San Juan.

Alright crew, let’s be straight with each other – the next 16 days are looking like a proper test for the dedicated crew only. We’ve got a patch of calm and marginal days kicking things off before the real muscle shows up, but it comes with a big, raw trade-wind punch that’ll keep things challenging. The water's sitting at 74°F, which is about a touch warmer than normal for this time of year, so at least you won't be freezing while you’re getting thumped.

For the first week, from Monday the 17th through to the end of the 24th, it’s pretty grim. Swell is small, generally around 2ft to 4ft, coming mostly from the north with a short period of 8 seconds. The winds are relentless – onshore from the north and northeast, blowing 9 to 19 mph. The combined energy is weak to moderate (highest is 330). This is poor surf conditions across the board, and honestly, you’d have to be a glutton for punishment to paddle out. Kite surfers might have a better time with that hard north wind.

Now, around the 25th of August, things start to get interesting if you’re an expert. The swell picks up and keeps building. On Tuesday the 25th we see 6ft to 7ft from the NNE, period holds at 7 seconds, but that fresh breeze from the NNE (19-22 mph) is still howling onshore, making it messy (combined energy 373 to 438). It’s big but not clean. That sets the tone for the rest of the forecast.

For a standout day, you have to look at Sunday the 30th of August. That morning, the swell hits 8ft from the NNE, with an 8-second period. But here's the thing – it’s big, and for a reef break like San Juan (Puerto Rico), that is pure expert territory. The winds finally ease off, turning into a gentle breeze from the NNE at 9 mph and blowing directly offshore. That’s glassy, clean conditions. The combined energy is 1429 (strong), and the file notes that wind and tide are favorable. But it also warns the swell might be too big for this break. If you're a seasoned charger, this is your window – but only if you’ve got the skills to handle serious, powerful reef waves. Expect crowds to be possible here.

After that, the pump continues into the first week of September with solid 7ft to 7ft NNE groundswell (9-second period), but those onshore winds crank back up to 25 mph, putting a cap on the quality. The combined energy stays very strong (693-787), but with that strong breeze blowing onshore, it’s going to be a battle to get out and a grind once you’re in.

In summary: the first week is a write-off. The second week has size, but only the 30th of August morning stands out as a potential clean, big-wave session for experts. The rest is big, raw, and windy. No easy rides on offer here.

Rusty.

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