Big Rock Surf Break

Lat Long: 32.82° N 117.28° W

Big Rock Surf Forecast and Surf Report

Issued: 10 am 15 Sep 2026 (local time)

Forecast update in  hr  min

Today's Big Rock sea temperature is
22.8°C
2.9° 

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


Big Rock surf forecast from 15 Sep 2026:

  • Best quality surf: Monday 21 Sep, 11PM (local time) - 3ft (0.9m), 16s period, SW swell with glassy winds.
  • Most powerful swell: Monday 21 Sep, 5AM (local time) - 3ft (0.9m), 17s period, SW swell with 487 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 15 Sep, 11PM (local time) - 1.5ft (0.5m), 16s period with SW swell.

Best Forecast Surf Conditions for Big Rock this week:

The surf forecast for Big Rock over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 15) at 11PM. The primary swell is predicted to be 0.5m and 16s period with a secondary swell of 0.6m and 9s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Big Rock in the next 16 days are 0.9m 17s and forecast to arrive on Monday (Sep 21) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+)11PM (Tue 15th Sep)1.5ft (0.5m) 16s
Best Surf11PM (Mon 21st Sep)3ft (0.9m) 16s
Most Powerful 5AM (Mon 21st Sep)3ft (0.9m) 17s

Table - best surf conditions forecast for Big Rock over the next 16 days.


The Lowdown

Alright, let’s get this out there. It’s a bit of a quiet stretch ahead for the 16-day run. I’ve been staring at the charts and honestly, there’s nothing that’s going to have you calling in sick for work. We’re looking at a long patch of small, weak surf with a lot of on or cross-onshore wind messing things up. It’s not a total write-off, but you’re going to have to be patient and pick your moments.

The first few days are looking pretty poor. Tuesday the 15th and Wednesday the 16th, we’ve got tiny waves, around 1ft to 3ft, and the wind is cross-onshore, so it’s going to be lumpy and messy. The energy is weak, with readings around 260 to 392 (moderate wave energy). It’s the kind of stuff you paddle out for a look, maybe get a few grovelly ones, but you won’t be sprinting for your board.

Things pick up a touch from the 17th through the 20th. Swell heights hover around 2ft to 3ft, but the period is still short, under 18 seconds, so it lacks any real push. The wind is mostly onshore, which will keep things bumpy. The combined energy is marginal, between 425 and 558 (moderate wave energy). The comments say it’s all “poor” or “marginal,” which is about right. It’s not going to be clean, and the tide will be a factor. Spotting a window here will take some local knowledge.

Now, there is a slight lift in the second week. From the 21st to the 23rd, the swell stays small at 3ft but the period stretches out to 17 seconds. That’s a longer period groundswell, which gives the waves a bit more shape and push. The energy also climbs, hitting around 603 (moderate wave energy) on the 21st. The problem remains the wind—it’s still cross-onshore in the morning, but it’s light, which might just clean it up enough. The afternoon looks a little better with a lighter breeze. This is the most promising window of the whole run, but it’s still not high quality. Think of it as a knee-high session with a few slightly better ones if you can find the right bank.

After the 24th, it fades again. The swell drops back to around 3ft and the period shortens, down to 12-14 seconds by the 27th. The energy remains moderate, but the quality is lacking. The wind is more from the northwest and cross-onshore, which doesn’t help. The last few days, from the 29th into the 30th, the swell really fades, dropping to 2ft to 2ft. It’s back to the dribble zone.

So to sum it up: the standout period, if you can call it that, is the morning of Monday the 21st. That’s when we see the biggest energy reading of 603 (moderate wave energy) and a slightly longer period. It’s a just surfable small day on a light cross-onshore wind. The other potential window is the morning of the 22nd, but it’s much the same.

The water is a warm 73°, which is 5° warmer than average. That’s a big deal, so don’t grab the 5/4, you’ll be cooking in a spring suit.

This is a stretch where you have to bring your shortboard and your patience. There are no real standouts, just a couple of windows of marginal, small surf. It’s not a time to be picky.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 20°C on Tue morning, min 19°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 21°C on Fri afternoon, min 19°C on Fri morning). Wind will be generally light.

Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
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
2
0
0
1
0
0
1
1
0
1
1
0
1
1
1
1
1
1
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
SW
16
0.4
SSW
20
0.5
SW
16
0.8
SW
17
0.7
SW
16
0.9
SW
16
0.8
SW
15
0.8
SW
15
0.8
SSW
14
0.6
SW
19
0.6
SW
19
0.5
SW
19
0.8
SW
18
0.8
SW
18
0.8
SW
18
0.8
SW
18
0.9
SW
18
0.8
SW
17
0.9
SW
17
0.9
SW
17
0.9
SW
16
Wave Graph
Metric surfscale
Energy kJ
161
149
121
358
254
371
284
255
268
303
303
183
379
370
375
370
449
354
470
465
437
Wind (km/h)
15
SSW
10
SW
5
SW
10
WSW
10
W
5
WNW
10
WNW
15
WNW
10
NW
10
W
15
WNW
10
NW
10
W
15
WNW
5
WNW
10
WSW
15
W
5
W
15
SW
10
WSW
5
SW
Wind State
cross-on
cross-on
glassy
cross-on
on
cross-on
on
cross-on
cross-on
on
cross-on
cross-on
on
on
cross-on
cross-on
on
on
cross-on
cross-on
glassy
High Tide
11:51AM1.60m
1:23AM0.98m
12:23PM1.51m
1:09PM1.41m
2:38PM1.34m
8:04AM1.10m
4:32PM1.35m
7:53AM1.16m
5:45PM1.44m
8:01AM1.21m
6:34PM1.54m
Low Tide
7:05PM0.30m
5:36AM0.78m
8:21PM0.37m
10:08PM0.39m
11:39PM0.32m
10:40AM1.07m
00:33AM0.23m
12:03PM0.97m
1:10AM0.14m
12:45PM0.84m
1:39AM0.08m
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:31
6:33
6:33
6:33
6:35
6:35
6:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:54
6:53
6:52
6:51
6:50
6:49
6:46
 mm
Temp °C
20
20
20
20
20
20
20
20
19
20
21
20
21
21
21
21
21
20
20
20
20
Feels °C
20
19
21
20
19
20
20
19
18
20
20
19
21
20
22
22
20
21
19
19
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 Big Rock Surf forecast

The above surf forecast table for Big Rock provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Big Rock can be found by selecting the local surf guide option on the grey menu. Our Big Rock 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 (Big Rock) 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 Big Rock 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.

Big Rock is 11 km (7 miles) from San Diego. If you plan a vacation in San Diego County, look for hotels and other accommodation in San Diego. San Diego has rooms for a wide range of budgets as well as car hire and transport links.

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