Surf Forecasts:
Big Rock surf forecast from 12 Aug 2026:
- Most powerful swell: Saturday 15 Aug, 2AM (local time) - 3.5ft (1.1m), 17s period, SW swell with 742 kJ wave energy.
Best Forecast Surf Conditions for Big Rock this week:
The most powerful waves expected at Big Rock in the next 16 days are 1.1m 17s and forecast to arrive on Saturday (Aug 15) at 2AM. 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+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Sat 15th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Big Rock over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s coming up for Big Rock over the next couple of weeks. Straight off the bat, I gotta say, it’s a tough stretch. This spot is a reef break for the advanced crew, and it’s usually pretty consistent, but the forecast is showing a big gap of poor conditions before anything rideable shows up.
The water at Big Rock is sitting at 75°, which is a massive 7° warmer than normal for this time of year. That’s very unusual, almost like stepping into a bath compared to what you’d expect.
We’ve got absolutely nothing worth paddling out for from Wednesday the 12th of August right through to the morning of Wednesday the 26th. That’s a solid two-week stretch of what the models are calling poor surf conditions. The swell is small, mostly around 2 ft to 4 ft, and the periods are short – think 13 to 18 seconds. The wind is mostly blowing onshore from the west or northwest, and the combined wave energy barely cracks the moderate range for most of it, staying under 500. It’s just not happening.
The first real glimmer of hope shows up on Thursday the 27th of August. Thursday morning we’ve got a 4 ft swell coming from the south, with a period of 14 seconds. The combined energy jumps way up to 902, which is a strong signal. The wind is light cross-onshore from the WSW at 6 mph, so it’ll be a little bumpy but surfable for the experienced.
Then, Thursday afternoon looks like the standout of the entire forecast. The wind swings around to the NNE at a mere 3 mph, going glassy. The swell holds at 4 ft from the south, with a period of 13 seconds, and the energy is still high at 810. The note on the forecast is that we should expect very good surf conditions. The only caveat is that this swell direction is coming from the south, while Big Rock prefers a west swell, so it might not be as lined up as it could be. Still, with glassy conditions on a reef, that’s the one to circle on your calendar. Keep in mind it’s for the advanced crew only at that size.
Rusty
Short Range ForecastMostly dry. Warm (max 22°C on Wed morning, min 19°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Mon afternoon, min 20°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
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) | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 179 | 310 | 251 | 245 | 344 | 273 | 263 | 255 | 742 | 432 | 560 | 546 | 438 | 404 | 350 | 350 | 289 | 231 | 211 | 171 | 258 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | cross-on | on | on | cross-on | on | on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on |
High Tide | 10:12AM1.39m | 9:31PM2.07m | 10:44AM1.46m | 10:14PM1.94m | 11:17AM1.52m | 10:58PM1.76m | 11:51AM1.56m | 11:43PM1.52m | 12:24PM1.56m | 00:31AM1.27m | 1:01PM1.54m | 1:34AM1.04m | 1:42PM1.49m | 3:28AM0.88m | |||||||
Low Tide | 3:19PM0.47m | 4:25AM-0.28m | 4:07PM0.40m | 4:58AM-0.16m | 4:55PM0.37m | 5:30AM0.02m | 5:45PM0.38m | 5:59AM0.22m | 6:41PM0.41m | 6:27AM0.42m | 7:47PM0.45m | 6:50AM0.62m | 9:15PM0.47m | ||||||||
 | |  |  | | |  | |  | | | | | | | | | | | | | |
 | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — |
 | — | 7:37 | — | — | 7:36 | — | — | 7:35 | — | — | 7:34 | — | — | 7:32 | — | — | 7:31 | — | — | 7:30 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 21 | 21 | 21 | 20 | 21 | 21 | 20 | 21 | 20 | 20 | 21 | 21 | 21 | 22 | 23 | 22 | 23 | 23 | 22 |
Feels °C | 22 | 22 | 22 | 22 | 21 | 20 | 21 | 20 | 20 | 21 | 19 | 20 | 21 | 19 | 20 | 22 | 22 | 21 | 22 | 22 | 23 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | WNW 6 | WNW 6 | W 6 | W 6 |
| kJ | 179 | 310 | 251 | 245 | 344 | 273 | 206 | 206 | 742 | 432 | 560 | 546 | 438 | 404 | 350 | 350 | 289 | 60 | 53 | 49 | 47 |
Swell 2 Height (m) Direction Period (s) | SSW 12 | SW 13 | SSW 11 | SSW 11 | SSW 11 | SW 20 | SW 18 | SW 18 | SSW 9 | SW 13 | S 11 | W 5 | S 10 | S 10 | S 10 | W 6 | W 10 | SW 14 | SW 16 | SW 16 | SW 15 |
| kJ | 46 | 44 | 43 | 43 | 40 | 134 | 263 | 255 | 25 | 109 | 21 | 19 | 9 | 8 | 7 | 31 | 8 | 231 | 211 | 171 | 258 |
Swell 3 Height (m) Direction Period (s) | SW 13 | S 12 | W 9 | SW 12 | SSW 21 | SSW 10 | SSW 9 | SSW 9 | W 11 | WNW 5 | W 11 | S 11 | W 10 | W 11 | W 10 | W 10 | S 9 | W 10 | SW 13 | SW 13 | SW 19 |
| kJ | 44 | 12 | 15 | 39 | 44 | 18 | 29 | 28 | 2 | 7 | 10 | 20 | 8 | 9 | 8 | 8 | 2 | 8 | 83 | 84 | 15 |
Wind waves Height (m) Direction Period (s) | W 4 | W 4 | — | WNW 9 | W 8 | — | — | WNW 7 | WNW 4 | — | W 5 | — | W 6 | W 5 | W 5 | WNW 6 | WNW 6 | — | — | — | — |
| kJ | 3 | 3 | — | 16 | 12 | — | — | 18 | 5 | — | 13 | — | 16 | 21 | 27 | 36 | 31 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 18 | 18 | 4 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 1 | 18 | 18 | 1 | 18 | 18 | 18 | 211 | 18 | 10 |
Best forecast wave conditions in San Diego County | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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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