
Surf Forecasts:
San Juan surf forecast from 20 Jul 2026:
- Most powerful swell: Saturday 25 Jul, 7PM (local time) - 10ft (3.0m), 8s period, NNE swell with 1,282 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 3.0m 8s and forecast to arrive on Saturday (Jul 25) at 7PM. 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 | 7PM (Sat 25th Jul) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for San Juan over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cookin’ for the San Juan area over the next couple of weeks.
Straight up, I gotta be honest with you – this is a tough stretch. We’ve got a solid 16-day window here, but it’s a real bumma. The whole forecast is riddled with “poor surf conditions” flags, and it’s all because of the wind. For the first week and a half, we’re lookin’ at a relentless onshore breeze – mostly from the NNE to N, blowing at 18 to 28 mph. That’s gonna trash any chance of clean waves. The swell is there, but it’s a short-period, wind-driven mess at 7 to 8 seconds, and it’s comin’ from the same direction as the wind. That’s just a recipe for choppy, blown-out, lumpy lines.
We do have some size, with the swell pushing 8 ft to 10 ft at times, especially around the 25th of July and again into the 2nd of August. But with that wind, it’s just gonna be a washing machine. The combined energy gets up there – moderate to strong in the 1000s (1176 on the 25th morning, 1282 on the 25th afternoon) – but it’s all for nothin’ with the conditions. Because of the size and the wind, this setup actually looks more interesting for kite surfing than paddle surfing. It’s too big for beginners when it’s over 5 ft, and once it’s over 8 ft, it’s really only for experts, but even they’d be lookin’ at a battle.
The only break on the cards is San Juan, a reef setup that’s consistent and exposed, but it needs a clean window. The optimum swell direction is NNW, but we’re gettin’ hammered from NNE and N, so it’s not even the right angle. The water temp is sittin’ at 73°F, which is a touch warmer than normal for this time of year.
The closest thing to a window might be the very end of the forecast. On July 31st, the wind drops a bit, and we get a slight shift to a NE direction in the morning at 12 mph, with a period stretchin’ to 9 seconds. That’s a bit more promising. But come August 1st and 2nd, the swell jumps back up to 8 ft to 10 ft, and the wind goes cross-onshore, so it’s back to messy.
The one standout? I’d have to say the morning of July 31st (Friday). The wind is onshore but only a moderate 12 mph from the NE, the swell is a manageable 5 ft from the N with a period of 9 seconds, and the combined energy is moderate (343). It’s not perfect, but it’s the least bad option in the whole run. Still, you’d be paddlin’ out into onshore wind, so keep the expectations low.
Pretty much the whole 16 days is a write-off for clean surf. The first week, from the 20th of July right through to the 29th, is a solid block of poor conditions. After that, things get a little less intense but still not good. We don’t get a single day with clean, offshore wind. It’s a tough one.
Stay tuned, forecasts can change. But for now, I’d be findin’ somethin’ else to do.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Mon morning, min 20°C on Mon morning). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Thu morning, min 20°C on Thu morning). Mainly strong winds. | ||||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 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) | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | N 8 |
Wave Graph | |||||||||||||||||||||
714 | 560 | 487 | 487 | 400 | 366 | 330 | 310 | 326 | 426 | 469 | 526 | 672 | 690 | 843 | 1176 | 1282 | 1174 | 1027 | 763 | 675 | |
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 | 6:56PM2.06m | 7:29AM1.85m | 7:50PM1.86m | 8:28AM1.75m | 8:56PM1.71m | 9:38AM1.71m | 10:14PM1.64m | 10:51AM1.74m | 11:27PM1.67m | 11:53AM1.82m | 00:23AM1.76m | 12:42PM1.94m | 1:07AM1.86m | ||||||||
Low Tide | 12:34PM0.55m | 1:11AM0.57m | 1:28PM0.70m | 2:03AM0.72m | 2:34PM0.81m | 3:08AM0.81m | 3:56PM0.85m | 4:23AM0.84m | 5:13PM0.80m | 5:31AM0.79m | 6:13PM0.70m | 6:23AM0.69m | 6:59PM0.58m | ||||||||
7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:09 | — | — | 7:09 | — | — | 7:09 | — | — | 7:11 | — | — | |
— | 8:52 | — | — | 8:52 | — | — | 8:52 | — | — | 8:51 | — | — | 8:51 | — | — | 8:50 | — | — | 8:50 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 21 | 20 | 21 | 21 | 20 | 21 | 21 | 20 | 21 | 21 | 20 | 21 | 21 | 20 | 21 | 21 | 20 | 21 | 21 | 21 |
Feels °C | 16 | 17 | 16 | 18 | 17 | 17 | 18 | 18 | 17 | 18 | 18 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 18 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | WNW 8 | WNW 8 | WNW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | WNW 9 | WNW 8 | WNW 8 | WNW 8 | — | — | — | WNW 10 | WNW 9 | WNW 10 |
13 | 6 | 6 | 13 | 30 | 29 | 25 | 24 | 23 | 21 | 21 | 15 | 7 | 7 | 7 | — | — | — | 10 | 9 | 9 | |
Swell 2 Height (m) Direction Period (s) | — | W 13 | NNW 9 | NNW 9 | — | WNW 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | 3 | 8 | 8 | — | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | NW 12 | W 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | 6 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | N 8 |
714 | 560 | 487 | 487 | 400 | 366 | 330 | 310 | 326 | 426 | 469 | 526 | 672 | 690 | 843 | 1176 | 1282 | 1174 | 1027 | 763 | 675 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 256 | 330 | 256 | 256 | 330 | 326 | 330 | 330 | 330 | 330 | 330 | 331 | 330 | 331 | 330 | 330 | 331 | 394 | 330 | 331 | 331 |
Best forecast wave conditions in Lanzarote | |||||||||||||||||||||
Best forecast wave conditions in Spain (Africa) | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.










