Surf Forecasts:
Big Rock surf forecast from 8 Sep 2026:
- Best quality surf: Thursday 10 Sep, 5AM (local time) - 2.5ft (0.8m), 17s period, SW swell with glassy winds.
- Most powerful swell: Thursday 10 Sep, 8AM (local time) - 3ft (0.9m), 16s period, SW swell with 448 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 5AM (local time) - 2.5ft (0.8m), 17s 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 Thursday (Sep 10) at 5AM. The primary swell is predicted to be 0.8m and 17s period with a secondary swell of 0.4m and 12s. 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 16s and forecast to arrive on Thursday (Sep 10) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Thu 10th Sep) | 2.5ft (0.8m) 17s |
| Best Surf | 5AM (Thu 10th Sep) | 2.5ft (0.8m) 17s |
| Most Powerful | 8AM (Thu 10th Sep) | 3ft (0.9m) 16s |
Table - best surf conditions forecast for Big Rock over the next 16 days.
The Lowdown
Alright, this is Rusty here, and I’ve been staring at the charts for the next couple of weeks. I gotta be straight with you – it’s a tough run for Big Rock. There’s nothing that gets me really fired up, but there are a few moments where a patient surfer might scratch an itch.
The overall pattern is one of persistent, moderate energy from the SW, but it’s fighting against a constant cross-onshore wind. The combined energy of all swells directed here is moderate, sitting in the 100-999 range, clocking in at 510 early on Tuesday the 8th. For the most part, the wind is just gonna mess up the surface, keeping things choppy and uninviting. We’re looking at a long stretch of nothing special from the 8th through to the 19th, with only a few sessions that are even worth a second look.
The only real glimmer of hope comes right at the end of the run. On Sunday the 20th, the swell energy jumps up to a strong level (900), and the wind swings light and cross-onshore from the SSW. The swell is coming from the SW at 3ft, with a long period of 19 seconds. That’s a proper groundswell. It’s not massive, but that long period will give the waves some weight and shape, even if the wind isn't perfectly offshore. The best bet is the morning session on the 20th, but it’s still just a marginal call. The morning of Monday the 21st also looks okay, with a 3ft SW swell and clean onshore wind from the W (energy at 829), but again, it’s not a standout.
If you’re an advanced surfer who is happy to deal with a bit of chop for some long-period energy, the Sunday the 20th morning is the best on offer. The swell is 3ft from the SW, with a period of 19 seconds. That kind of period will make the waves at Big Rock (a reef) stand up nicely, but it’s a long way out, so treat it as promising but not guaranteed.
This is a quiet period, folks. The forecasts change, so don’t lose hope, but for now, don’t plan your week around it.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Wed afternoon. Warm (max 28°C on Tue morning, min 22°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 22°C on Thu night, min 19°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | ||||||||||||||
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) | SSW 11 | SSW 10 | SSW 10 | SSW 9 | SW 16 | SW 16 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | W 8 | W 8 | W 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 573 | 212 | 208 | 151 | 214 | 267 | 342 | 437 | 416 | 406 | 395 | 365 | 301 | 248 | 200 | 158 | 115 | 173 | 127 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | on | on |
High Tide | 8:37AM1.37m | 7:53PM1.94m | 9:05AM1.48m | 8:38PM1.92m | 9:32AM1.58m | 9:21PM1.84m | 10:00AM1.66m | 10:03PM1.71m | 10:28AM1.70m | 10:44PM1.53m | 10:55AM1.70m | 11:28PM1.34m | |||||||
Low Tide | 2:10AM-0.20m | 1:46PM0.55m | 2:45AM-0.20m | 2:32PM0.40m | 3:17AM-0.14m | 3:15PM0.27m | 3:47AM-0.04m | 3:58PM0.20m | 4:15AM0.11m | 4:40PM0.16m | 4:41AM0.28m | 5:24PM0.18m | |||||||
 |  |  |  | |  |  | | | | | | | | | | | | | |
 | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — |
 | — | — | 7:05 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — |
mm | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 28 | 26 | 25 | 26 | 25 | 23 | 23 | 23 | 22 | 21 | 22 | 21 | 20 | 20 | 20 | 21 | 21 | 21 |
Feels °C | 25 | 28 | 26 | 24 | 26 | 25 | 25 | 24 | 22 | 23 | 21 | 21 | 21 | 20 | 19 | 21 | 21 | 21 | 22 |
Swell 1 Height (m) Direction Period (s) | SSW 11 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SW 16 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | W 6 | W 6 | W 7 | W 8 | W 8 | W 9 |
| kJ | 573 | 212 | 208 | 151 | 68 | 267 | 342 | 437 | 416 | 406 | 395 | 365 | 301 | 68 | 51 | 71 | 115 | 173 | 122 |
Swell 2 Height (m) Direction Period (s) | SW 18 | SW 13 | SSW 13 | SSW 13 | SW 16 | SSW 8 | SSW 12 | SSW 12 | W 6 | W 6 | W 6 | W 6 | W 6 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 |
| kJ | 50 | 180 | 118 | 114 | 214 | 45 | 56 | 56 | 16 | 17 | 40 | 51 | 49 | 248 | 200 | 158 | 113 | 109 | 109 |
Swell 3 Height (m) Direction Period (s) | SW 18 | SW 18 | SW 18 | SW 16 | SW 13 | SSW 12 | SW 8 | WNW 5 | SSW 12 | SSW 11 | SSW 10 | SW 6 | S 9 | WSW 14 | S 9 | WSW 13 | WSW 19 | SW 16 | SW 19 |
| kJ | 50 | 112 | 111 | 130 | 83 | 85 | 30 | 9 | 53 | 22 | 19 | 6 | 15 | 41 | 14 | 33 | 37 | 67 | 127 |
Wind waves Height (m) Direction Period (s) | WNW 4 | WNW 4 | WNW 4 | W 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 11 | 6 | 5 | 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1 | 18 | 18 | 18 | 18 | 18 | 3 | 3 | 3 | 3 | 66 | 150 | 3 | 67 | 18 | 18 | 3 | 18 | 10 |
Best forecast wave conditions in San Diego County | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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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