Surf Forecasts:
Big Rock surf forecast from 10 Aug 2026:
- Best quality surf: Monday 10 Aug, 8AM (local time) - 2.5ft (0.7m), 14s period, SW swell with glassy winds.
- Most powerful swell: Saturday 15 Aug, 2AM (local time) - 3.5ft (1.1m), 17s period, SW swell with 742 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 8AM (local time) - 2.5ft (0.7m), 14s 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 Monday (Aug 10) at 8AM. The primary swell is predicted to be 0.7m and 14s period with a secondary swell of 0.3m and 4s. 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 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+) | 8AM (Mon 10th Aug) | 2.5ft (0.7m) 14s |
| Best Surf | 8AM (Mon 10th Aug) | 2.5ft (0.7m) 14s |
| 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. Gotta be straight with you – looking at the next 16 days for Big Rock, it’s a tough run. The models are showing a real flat spell, and for an exposed reef that needs a solid W swell to line up, we’re looking at a whole lot of nothing. There’s a gap of several days right from the start with no real surf to speak of, so don’t be in a rush.
The first time we even see a glimmer of hope is on Wednesday, 12 August, with a small SW swell rolling in at 2ft and a period of 17 seconds. The energy is weak (269), and while the morning has light onshore wind, it’s still just marginal. That long period is a hint of something deeper, but there’s no power behind it. The water temp is about average for the time of year, nothing to write home about.
By Thursday, 13 August, it’s the same story – a 2ft SW swell with a 16-second period, but the energy is still weak (323) and the wind is onshore. It’s not doing anything for us.
The best the whole window has to offer, and I’m saying this with a heavy heart, is the weekend of 15-16 August. On Saturday morning, 15 August, we’ve got 3ft of SW swell at 16 seconds, with the energy finally climbing into the moderate range (591). The wind is light and onshore from the WNW, so it’s not clean, but it’s the most push we’ll see. The waves will be weak and soft, but it’s the only thing that even sniffs a rideable wave. By Sunday morning, 16 August, the swell is a bit bigger at 4ft, but the period drops to 15 seconds and the energy stays moderate (529). The wind remains onshore, so don’t expect any barrels.
After that, it’s back to the doldrums. The energy drops off a cliff, dipping below 100 by Saturday, 22 August, with tiny 2ft swell and short 12-second periods. The very end of the run, on Tuesday, 25 August, shows a 2ft SW swell with a 16-second period and a cross-shore wind, but the energy is still only moderate (499) and the forecast is marginal. For a reef that’s fairly consistent, this is a real blank run. It’s a tough call, but the surf just isn’t there. Keep the board in the car for the next system.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Mon night. Warm (max 23°C on Mon afternoon, min 21°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 22°C on Wed night, min 19°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
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 14 | SW 13 | SW 20 | SW 13 | SW 18 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 211 | 183 | 134 | 173 | 118 | 197 | 249 | 179 | 310 | 251 | 245 | 239 | 273 | 263 | 255 | 742 | 432 | 560 | 619 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | on | cross-on | on | on | on | on | on | on | on | on | on | cross-on | on | cross-on | cross-on |
High Tide | 9:08AM1.21m | 7:56PM2.09m | 9:39AM1.30m | 8:45PM2.12m | 10:12AM1.39m | 9:31PM2.07m | 10:44AM1.46m | 10:14PM1.94m | 11:17AM1.52m | 10:58PM1.76m | 11:51AM1.56m | 11:43PM1.52m | |||||||
Low Tide | 2:32AM-0.30m | 1:37PM0.69m | 3:12AM-0.36m | 2:30PM0.57m | 3:50AM-0.36m | 3:19PM0.47m | 4:25AM-0.28m | 4:07PM0.40m | 4:58AM-0.16m | 4:55PM0.37m | 5:30AM0.02m | 5:45PM0.38m | |||||||
 |  | |  |  | | | |  |  | | | | | | |  | | | |
 | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — |
 | — | — | 7:38 | — | — | 7:37 | — | — | 7:37 | — | — | 7:36 | — | — | 7:35 | — | — | 7:34 | — |
mm | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 23 | 22 | 23 | 23 | 22 | 22 | 22 | 22 | 21 | 21 | 20 | 21 | 21 | 20 | 21 | 22 | 21 |
Feels °C | 23 | 25 | 24 | 23 | 23 | 23 | 22 | 24 | 22 | 23 | 23 | 21 | 21 | 21 | 20 | 20 | 21 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 13 | SSW 13 | SW 13 | SSW 12 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 17 | SW 16 | SW 16 | SW 16 |
| kJ | 211 | 183 | 118 | 173 | 87 | 197 | 249 | 179 | 310 | 251 | 245 | 239 | 273 | 206 | 206 | 742 | 432 | 560 | 619 |
Swell 2 Height (m) Direction Period (s) | W 5 | SW 20 | SW 20 | SW 19 | SW 14 | WSW 14 | SSW 12 | SSW 12 | SW 13 | SSW 11 | SSW 11 | SSW 11 | SW 20 | SW 18 | SW 18 | S 10 | SW 13 | S 10 | W 5 |
| kJ | 7 | 63 | 134 | 133 | 54 | 120 | 48 | 46 | 44 | 40 | 40 | 38 | 134 | 263 | 255 | 16 | 140 | 16 | 25 |
Swell 3 Height (m) Direction Period (s) | SW 11 | W 12 | SW 16 | WNW 10 | SW 18 | SSW 12 | SW 13 | SW 13 | W 10 | W 12 | SW 12 | SW 12 | S 10 | S 11 | S 9 | SSW 9 | S 9 | SW 8 | S 11 |
| kJ | 30 | 11 | 40 | 20 | 118 | 57 | 45 | 44 | 8 | 3 | 38 | 23 | 16 | 36 | 26 | 7 | 13 | 2 | 20 |
Wind waves Height (m) Direction Period (s) | — | W 4 | — | — | — | WNW 12 | — | — | — | WNW 9 | — | W 8 | — | — | WNW 8 | W 4 | WNW 4 | W 5 | WNW 5 |
| kJ | — | 3 | — | — | — | 48 | — | — | — | 8 | — | 12 | — | — | 19 | 7 | 6 | 11 | 28 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 18 | 18 | 18 | 4 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 1 | 18 | 18 | 18 |
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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