Surf Forecasts:
San Juan surf forecast from 28 Jul 2026:
- Most powerful swell: Friday 31 Jul, 4AM (local time) - 6ft (1.9m), 7s period, NNE swell with 336 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 1.9m 7s and forecast to arrive on Friday (Jul 31) at 4AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (Fri 31st Jul) | 6ft (1.9m) 7s |
Table - best surf conditions forecast for San Juan over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let me be straight with you – this 16-day window for San Juan is a tough one to swallow. I’ve looked through the data, and there’s not a single good day in the whole run. It’s a blank run, plain and simple. Every single entry, from the 28th of July all the way through to the 12th of August, is flagged as poor surf conditions. That’s a solid two-week stretch with nothing to recommend.
The core problem is the wind. We’ve got a relentless blast from the north and north-northeast, blowing onshore for the vast majority of the period. From Tuesday morning, July 28th, it’s a moderate breeze at 15 mph, ramping up to a fresh breeze of 19 mph by the next day. This pattern just locks in. The swell is there, but it’s a short-period, wind-driven mess, mostly around 4 ft to 6 ft with periods of only 6 to 8 seconds. The combined energy is moderate, in the 200s and 300s (like 189 on the 28th, 315 on the 30th), but it’s all blown out.
Later in the run, around the 10th and 11th of August, the swell does get bigger – 7 ft to 8 ft – and the energy jumps significantly, hitting 914 on the 11th. But, and it’s a big but, that comes with a stiff 19-22 mph onshore wind. That’s just raw, choppy, unsurfable conditions. For a spot like San Juan, a reef break that’s consistently exposed to this northerly wind, it’s a total washout. Honestly, a setup like this, with significant swell and strong onshore wind on a beach-and-reef combo, it looks more interesting for kite surfing than paddle surfing. There’s no light wind, no offshore flow, nothing to give us a window. It’s a rare, poor run for the area, but it happens. We just have to wait for the forecasts to change.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Thu afternoon, min 19°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Sat morning, min 20°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | |||||||||||||||
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 7 | N 7 | NNE 6 | NNE 6 | NNE 6 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | N 7 | N 7 | N 7 | NNE 6 | NNE 6 | NNE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 163 | 155 | 117 | 145 | 177 | 207 | 273 | 295 | 303 | 297 | 240 | 233 | 166 | 139 | 118 | 107 | 89 | 89 | 131 | 153 | 214 |
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 | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on |
High Tide | 2:00PM2.20m | 2:20AM2.06m | 2:33PM2.31m | 2:52AM2.13m | 3:06PM2.38m | 3:24AM2.17m | 3:37PM2.42m | 3:56AM2.19m | 4:09PM2.41m | 4:29AM2.18m | 4:42PM2.36m | 5:04AM2.14m | 5:18PM2.28m | ||||||||
Low Tide | 7:42AM0.46m | 8:13PM0.36m | 8:16AM0.37m | 8:46PM0.28m | 8:48AM0.30m | 9:18PM0.23m | 9:20AM0.26m | 9:49PM0.21m | 9:52AM0.26m | 10:21PM0.21m | 10:25AM0.29m | 10:54PM0.25m | 11:01AM0.36m | 11:30PM0.32m | |||||||
 | |  | | | |  | |  | | | | | | | | | | | | | |
 | 7:11 | — | — | 7:11 | — | — | 7:13 | — | — | 7:13 | — | — | 7:13 | — | — | 7:15 | — | — | 7:15 | — | — |
 | — | 8:49 | — | — | 8:47 | — | — | 8:46 | — | — | 8:46 | — | — | 8:45 | — | — | 8:45 | — | — | 8:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 21 | 20 | 21 | 21 | 20 | 21 | 22 | 21 | 22 | 23 | 22 | 25 | 24 | 22 | 24 | 25 | 22 | 23 | 23 | 22 |
Feels °C | 19 | 19 | 19 | 19 | 19 | 18 | 19 | 19 | 19 | 21 | 22 | 23 | 27 | 26 | 23 | 25 | 24 | 22 | 22 | 20 | 20 |
Swell 1 Height (m) Direction Period (s) | N 12 | NNW 11 | NNW 11 | NNW 10 | NNW 10 | NW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | N 10 | NW 11 | WNW 10 | NNE 7 | NNE 7 | WNW 9 | WNW 8 | WNW 10 | WNW 9 | WNW 9 | WNW 9 |
| kJ | 12 | 25 | 23 | 18 | 22 | 28 | 19 | 9 | 9 | 8 | 16 | 29 | 64 | 139 | 118 | 30 | 41 | 55 | 47 | 31 | 33 |
Swell 2 Height (m) Direction Period (s) | WNW 8 | NW 8 | WNW 12 | WNW 11 | WNW 11 | N 10 | N 12 | N 12 | N 11 | N 11 | WNW 9 | N 10 | NW 10 | WNW 9 | WNW 9 | WNW 11 | N 10 | N 10 | N 9 | N 9 | NW 12 |
| kJ | 7 | 3 | 14 | 12 | 12 | 8 | 3 | 11 | 10 | 9 | 8 | 7 | 4 | 59 | 55 | 22 | 17 | 30 | 15 | 14 | 6 |
Swell 3 Height (m) Direction Period (s) | NW 13 | NW 12 | NW 8 | N 11 | NW 8 | — | — | — | — | NW 12 | WNW 11 | WNW 8 | — | N 12 | N 12 | N 11 | NW 8 | — | W 9 | WNW 11 | — |
| kJ | 7 | 6 | 3 | 10 | 3 | — | — | — | — | 6 | 12 | 7 | — | 3 | 3 | 9 | 3 | — | 2 | 12 | — |
Wind waves Height (m) Direction Period (s) | N 8 | N 7 | N 7 | NNE 6 | NNE 6 | NNE 6 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | — | — | N 7 | N 7 | N 7 | NNE 6 | NNE 6 | NNE 7 |
| kJ | 163 | 155 | 117 | 145 | 177 | 207 | 273 | 295 | 303 | 297 | 240 | 233 | 166 | — | — | 107 | 89 | 89 | 131 | 153 | 214 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 38 | 38 | 38 | 368 | 1587 | 392 | 38 | 335 | 38 | 38 | 38 | 16 | 14 | 10 | 38 | 14 | 326 | 33 | 276 | 231 | 38 |
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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