San Juan Surf Break

Lat Long: 29.12° N 13.57° W

San Juan Surf Forecast and Surf Report

Issued: 6 am 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's San Juan sea temperature is
23.4° C
1.3° 

San Juan surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


San Juan surf forecast from 17 Aug 2026:

  • Best quality surf: Tuesday 18 Aug, 4PM (local time) - 3.5ft (1.0m), 8s period, N swell with glassy winds.
  • Most powerful swell: Monday 24 Aug, 1AM (local time) - 4.5ft (1.3m), 10s period, NNE swell with 328 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 18 Aug, 4PM (local time) - 3.5ft (1.0m), 8s period with N swell.

Best Forecast Surf Conditions for San Juan this week:

The surf forecast for San Juan over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 4PM. The primary swell is predicted to be 1.0m and 8s period with a secondary swell of 0.2m and 8s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at San Juan in the next 16 days are 1.3m 10s 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 Wednesday (Aug 19) at 7AM.

Wave TypeTime (WEST) & Date Wave Height & Period
Next good surf (1 star+) 4PM (Tue 18th Aug)3.5ft (1.0m) 8s
Best Surf 4PM (Tue 18th Aug)3.5ft (1.0m) 8s
Most Powerful 1AM (Mon 24th Aug)4.5ft (1.3m) 10s

Table - best surf conditions forecast for San Juan over the next 16 days.


The Lowdown

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.

Short Range Forecast

Mostly dry. Warm (max 24°C on Mon morning, min 21°C on Mon night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 23°C on Thu morning, min 21°C on Sat night). Mainly fresh winds.

Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
N
8
1.2
N
9
1.1
N
9
1
N
8
1
N
8
1
N
8
1
N
8
1
N
8
1
N
8
0.9
N
8
1
N
8
1.3
N
8
1.5
N
7
1.7
N
7
1.8
N
7
1.6
N
7
1.5
N
7
1.4
NNE
7
1.3
N
9
1.3
N
9
1.3
NNE
10
Wave Graph
Metric surfscale
Energy kJ
177
220
184
132
132
135
132
130
136
111
130
208
230
262
295
243
218
191
269
269
328
Wind (km/h)
20
N
15
N
10
N
10
NNE
25
N
15
NNE
15
N
20
N
15
N
25
N
30
N
30
N
35
N
35
N
35
NNE
30
NNE
25
NNE
30
NNE
30
NNE
30
N
25
N
Wind State
on
on
on
on
on
on
on
cross-on
cross-on
cross-on
on
on
on
on
on
on
on
on
on
on
on
High Tide
5:27PM2.23m
5:49AM2.04m
6:07PM1.99m
6:30AM1.88m
6:53PM1.77m
7:22AM1.73m
7:58PM1.59m
8:40AM1.62m
9:36PM1.51m
10:19AM1.63m
11:09PM1.57m
11:34AM1.76m
00:07AM1.70m
Low Tide
11:09AM0.33m
11:35PM0.40m
11:49AM0.50m
00:11AM0.59m
12:34PM0.68m
00:55AM0.77m
1:34PM0.84m
2:00AM0.91m
3:08PM0.93m
3:41AM0.96m
4:53PM0.89m
5:11AM0.88m
5:59PM0.75m
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:22
7:24
7:24
7:24
7:24
7:26
7:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:31
8:30
8:30
8:29
8:28
8:27
8:25
 mm
Temp °C
24
23
22
23
24
22
23
24
23
23
23
22
23
23
22
22
23
22
23
23
22
Feels °C
23
22
23
24
27
23
24
25
25
22
22
20
22
20
19
19
20
20
21
21
21
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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