San Juan Surf Break

Lat Long: 16.66° N 120.32° E

San Juan Surf Forecast and Surf Report

Issued: 1 am 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's San Juan sea temperature is
28.9°C
0.1° 

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 30 Aug 2026:

  • Best quality surf: Thursday 3 Sep, 11PM (local time) - 5ft (1.6m), 8s period, W swell with cross-offshore winds.
  • Most powerful swell: Wednesday 2 Sep, 8PM (local time) - 11ft (3.5m), 11s period, W swell with 2,828 kJ wave energy.
  • Next surfable swell (1★+): Thursday 3 Sep, 11PM (local time) - 5ft (1.6m), 8s period with W 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 Thursday (Sep 03) at 11PM. The primary swell is predicted to be 1.6m and 8s period with a secondary swell of 0.6m and 8s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at San Juan in the next 16 days are 3.5m 11s and forecast to arrive on Wednesday (Sep 02) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 12s period and expected on Wednesday (Sep 02) at 11AM.

Wave TypeTime (PST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Thu 3rd Sep)5ft (1.6m) 8s
Best Surf11PM (Thu 3rd Sep)5ft (1.6m) 8s
Most Powerful 8PM (Wed 2nd Sep)11ft (3.5m) 11s

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


The Lowdown

Yo, what's up? Rusty here, and I gotta be straight with you – the outlook for the next couple of weeks is a real struggle. We're looking at a long stretch of pretty ordinary conditions with very few windows of opportunity. The water temp is sitting around average for the time of year, nothing unusual there.

The first real chance to even think about paddling out comes on Thursday, September 3rd, at San Juan (Luzon). It's a reef break, but it's inconsistent and only really for beginners. We're looking at a moderate 8ft swell from the West, with a short period of 9 seconds, giving a moderate wave energy (890). The wind is a cross-offshore from the SW at 16 mph, which will keep things relatively clean on the surface. The swell is a bit too big for true beginners, but it's the best we've got. Thursday afternoon sees the swell drop to 6ft with the same wind, still a cross-offshore but lighter at 9 mph. The hype is minimal, but it's the only slot on the board that's even close to surfable.

After that, we're staring down a massive gap. From Friday, September 4th, all the way through to Thursday, September 10th, the surf is just flat or blown out. It's a dead zone – poor conditions, tiny waves, or messy winds. It's a real bummer.

Then, on Friday, September 11th, we get a glimmer of hope. The morning session at San Juan could be worth a look. The swell is 5ft from the West, with a short period of 6 seconds, and the wave energy is moderate (202). The real standout is the wind – glassy, with a light SSE breeze at just 3 mph. That's pretty rare and will make for clean, smooth faces. The waves will be small and a bit weak, but it's the best the entire forecast has to offer. The afternoon gets messy again with a 7ft swell and a cross-onshore wind.

The rest of the second week, from Saturday, September 12th onwards, is back to the same old story – poor conditions, strong winds, and messy surf. The wind is mostly cross-shore or cross-onshore, and the swell is all over the place. There's a couple of spots with a bit more size, like 5ft to 6ft, but the wind is just too strong to make it any good. It looks more like a kite-surfing setup than a paddle-surfing one.

So, to sum it up: if you're desperate, you've got two small windows – Thursday the 3rd and Friday morning the 11th. The rest of the time, you're better off finding something else to do.

Stay salty,
Rusty

Short Range Forecast

Heavy rain (total 113mm), heaviest during Mon night. Warm (max 29°C on Wed morning, min 27°C on Mon morning). Mainly fresh winds.

Days 4-6 Weather Summary

Heavy rain (total 78mm), heaviest during Thu afternoon. Warm (max 29°C on Sat morning, min 26°C on Thu night). Mainly fresh winds.

Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
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
2
1
2
2
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)
2.2
WSW
9
0.5
WNW
9
0.7
WNW
10
2.4
WSW
10
0.6
WNW
10
3
WSW
11
3.5
WSW
12
0.9
WNW
11
3
W
11
2.5
W
9
2
W
9
1.4
W
8
0.9
W
7
0.7
WNW
7
0.6
WNW
7
0.5
WNW
7
0.4
WNW
6
0.3
WNW
6
0.3
NW
5
0.1
NW
5
0.1
NW
5
Wave Graph
Metric surfscale
Energy kJ
0
49
97
0
85
0
0
197
2152
1075
627
253
88
57
37
26
12
6
4
1
1
Wind (km/h)
30
S
30
SSW
30
SSW
30
SSW
30
S
30
S
40
SSW
35
SSW
30
SSW
25
SSW
20
SW
15
SSW
20
SSW
15
SSW
15
S
15
SSW
15
SSW
15
S
15
SSW
10
SSW
10
S
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
High Tide
10:39AM0.67m
11:14PM0.60m
11:32AM0.54m
11:45PM0.70m
1:03PM0.41m
00:26AM0.81m
1:17AM0.90m
2:18AM0.96m
3:27AM1.01m
4:38AM1.04m
Low Tide
5:16PM0.40m
5:38AM0.38m
4:46PM0.43m
7:50AM0.34m
3:30PM0.40m
10:28AM0.25m
12:20PM0.15m
1:28PM0.07m
2:24PM0.02m
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
thunderstorm
thunderstorm
clear
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:45
5:45
5:45
5:45
5:45
5:45
5:45
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:13
6:12
6:10
6:09
6:09
6:08
6:07
 mm
12
11
29
10
8
12
4
8
19
7
12
17
6
10
12
5
9
4
5
Temp °C
27
27
27
28
28
27
29
28
27
27
27
27
28
28
27
29
29
27
29
29
27
Feels °C
29
27
27
29
29
28
28
27
27
27
28
30
30
30
31
32
32
31
31
32
31
  • 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.

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