Surf Forecasts:
San Juan surf forecast from 20 Aug 2026:
- Most powerful swell: Monday 24 Aug, 1AM (local time) - 6ft (1.8m), 13s period, NNW swell with 1,009 kJ wave energy.
Best Forecast Surf Conditions for San Juan this week:
The most powerful waves expected at San Juan in the next 16 days are 1.8m 13s and forecast to arrive on Monday (Aug 24) at 1AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.1m 13s period and expected on Thursday (Aug 20) at 4PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Mon 24th Aug) | 6ft (1.8m) 13s |
Table - best surf conditions forecast for San Juan over the next 16 days.
The Lowdown
Alright, Rusty here, looking at the 16-day outlook for the region. Let’s be straight with you – it’s gonna be a long wait for anything decent. The whole stretch from now through the end of August is a write-off. Onshore winds and poor surf are the story day after day, with a solid week of that just to start. A real bummer.
The first sniff of anything worth paddling out for doesn’t show up until Tuesday, the 1st of September. Even then, it’s messy. Tuesday afternoon at San Juan sees a solid 7ft swell from the NNE, but the water’s a touch warmer than average at 75°F, which is a bit unusual for this time of year, but it’s not the main issue. The problem is that swell is predicted to be too big for this expert-level reef break, so it’s likely just going to close out.
Now, the standout moment. You wanna circle Wednesday morning, the 2nd of September. That’s the one. San Juan is expecting glassy conditions with the wind going totally still, which is a major positive for getting clean, workable waves. We’ve got a 6ft NE groundswell, pulling in some real energy – the combined energy of all swells directed here is showing a strong 778. That’s proper power. But here’s the thing: that 8-second period isn’t super long, so at a reef break like this, it could still offer up decent shape. This is your best bet, but it is a week and a half away, so treat it as a promising lead, not a guarantee. Comments suggest it could be very good, and since it’s a consistent spot, it’s worth the wait.
After that, things go back to poor conditions quickly. The 3rd of September has more size – 8ft to 8ft – but the wind switches back onshore, making it choppy and ugly. For a reef setup, anything over 8ft is expert territory, so the 4th of September is really only for the brave with a death wish, and not much fun for anyone else. The short period and strong wind would honestly make this setup more interesting for kite surfing than paddle surfing through the whole period, except for that one glassy morning.
To sum it up: you’ve got a big gap of no-good surf until early September, then one gorgeous-looking window on the 2nd. Lock it in if you can.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Thu morning, min 20°C on Sat night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Sun afternoon, min 21°C on Sun morning). Mainly fresh winds. | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | N 8 | N 8 | N 6 | N 7 | NNE 7 | N 6 | N 7 | N 7 | NNW 10 | N 9 | NNW 13 | NNW 13 | NNW 11 | NNW 11 | NNW 10 | NNW 9 | NNW 9 | N 8 | N 6 | N 6 | NNE 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 160 | 182 | 170 | 171 | 152 | 115 | 126 | 124 | 106 | 136 | 746 | 1009 | 604 | 582 | 338 | 193 | 140 | 273 | 146 | 127 | 140 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on |
High Tide | 7:58PM1.59m | 8:40AM1.62m | 9:36PM1.51m | 10:19AM1.63m | 11:09PM1.57m | 11:34AM1.76m | 00:07AM1.70m | 12:24PM1.92m | 00:49AM1.86m | 1:02PM2.10m | 1:23AM2.00m | 1:35PM2.26m | 1:55AM2.13m | ||||||||
Low Tide | 1:34PM0.84m | 2:00AM0.91m | 3:08PM0.93m | 3:41AM0.96m | 4:53PM0.89m | 5:11AM0.88m | 5:59PM0.75m | 6:07AM0.74m | 6:42PM0.60m | 6:46AM0.58m | 7:17PM0.44m | 7:20AM0.43m | 7:48PM0.30m | ||||||||
 | |  | | | | | | | | | | | | | | | | | | | |
 | 7:24 | — | — | 7:24 | — | — | 7:26 | — | — | 7:26 | — | — | 7:26 | — | — | 7:26 | — | — | 7:28 | — | — |
 | — | 8:29 | — | — | 8:28 | — | — | 8:27 | — | — | 8:25 | — | — | 8:24 | — | — | 8:23 | — | — | 8:22 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 23 | 22 | 23 | 23 | 22 | 22 | 22 | 21 | 22 | 23 | 21 | 23 | 23 | 22 | 23 | 23 | 22 | 22 | 22 | 22 |
Feels °C | 22 | 21 | 21 | 22 | 21 | 21 | 20 | 20 | 19 | 22 | 23 | 21 | 23 | 23 | 22 | 22 | 22 | 20 | 19 | 19 | 21 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 9 | WNW 9 | NW 8 | WNW 8 | WNW 8 | N 12 | N 11 | NNW 10 | N 9 | NNW 13 | NNW 13 | NNW 11 | NNW 11 | NNW 10 | NNW 9 | NNW 9 | NW 10 | NW 9 | NW 9 | NW 9 |
| kJ | 37 | 33 | 32 | 18 | 14 | 13 | 71 | 116 | 106 | 136 | 746 | 1009 | 604 | 582 | 338 | 193 | 140 | 4 | 3 | 3 | 3 |
Swell 2 Height (m) Direction Period (s) | S 13 | S 13 | S 13 | W 12 | NW 11 | NW 10 | WNW 9 | WNW 9 | WNW 9 | N 11 | WNW 9 | WNW 8 | WNW 8 | W 8 | W 8 | W 7 | W 7 | W 7 | — | — | — |
| kJ | 3 | 3 | 3 | 3 | 5 | 4 | 15 | 16 | 15 | 39 | 7 | 7 | 6 | 5 | 4 | 1 | 1 | 1 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | N 11 | N 14 | W 9 | S 13 | S 13 | NNW 15 | WNW 9 | — | N 10 | — | — | — | NW 10 | — | — | — | — |
| kJ | — | — | — | — | 2 | 4 | 2 | 3 | 3 | 87 | 7 | — | 2 | — | — | — | 4 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | N 8 | N 8 | N 6 | N 7 | NNE 7 | N 6 | N 7 | N 7 | N 7 | — | N 2 | — | NNE 4 | NNE 4 | NNE 4 | NNE 5 | NNE 5 | N 8 | N 6 | N 6 | NNE 6 |
| kJ | 160 | 182 | 170 | 171 | 152 | 115 | 126 | 124 | 83 | — | 1 | — | 9 | 7 | 17 | 52 | 54 | 273 | 146 | 127 | 140 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 251 | 231 | 38 | 251 | 231 | 38 | 38 | 326 | 38 | 9 | 17 | 9 | 38 | 38 | 38 | 231 | 38 | 330 | 259 | 519 | 392 |
Best forecast wave conditions in Lanzarote | |||||||||||||||||||||
Best forecast wave conditions in Spain (Africa) | |||||||||||||||||||||
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Information about the San Juan Surf forecast
The above surf forecast table for San Juan provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at San Juan can be found by selecting the local surf guide option on the grey menu. Our San Juan surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (San Juan) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for San Juan may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
San Juan is 8 km (5 miles) from Teguise. If you plan a holiday in Lanzarote, look for hotels and other accommodation in Teguise. Teguise has rooms for a wide range of budgets as well as car hire and transport links.
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