Surf Forecasts:
Big Rock surf forecast from 26 Aug 2026:
- Best quality surf: Friday 28 Aug, 8AM (local time) - 2.5ft (0.8m), 17s period, SW swell with glassy winds.
- Most powerful swell: Saturday 29 Aug, 2AM (local time) - 3.5ft (1.1m), 17s period, SW swell with 663 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 11PM (local time) - 3.5ft (1.1m), 11s period with S 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 Wednesday (Aug 26) at 11PM. The primary swell is predicted to be 1.1m and 11s period with a secondary swell of 0.6m and 15s. 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 29) at 2AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 26th Aug) | 3.5ft (1.1m) 11s |
| Best Surf | 8AM (Fri 28th Aug) | 2.5ft (0.8m) 17s |
| Most Powerful | 2AM (Sat 29th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Big Rock over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s going on.
Honestly, the next 16 days are a bit of a grind. We’ve got a whole lot of small, marginal surf, and the charts are teasing us with a couple of windows that might just fire. The water is sitting at a very warm 73°F, which is about 5°F warmer than usual for this time of year – that’s a notable anomaly, feels more like a tropical bath than a typical late-summer session.
The combined wave energy is moderate, topping out in the mid-700s to low-900s range (719 to 910), but the quality score is almost always a 1 or a 0. The first real standout doesn’t come until the start of September. The first ten days are mostly a write-off, with a few small, weak pulses and persistent onshore or cross-onshore winds. There’s a long gap of poor to marginal conditions from the 26th of August right through the 1st of September.
But hold on... The 2nd of September (Wednesday) is the one to mark on the calendar. Big Rock is the only break we’ve got data for, and it’s a solid reef setup for advanced surfers. That morning, we get a window of glassy, glassy conditions – a light air from the NW at 3 mph. It’s going to be clean. The swell is a modest 4 ft from the SSW, with a solid 12-second period. That’s not huge, but it’s a proper groundswell, and with the reef, it should shape up nicely. The combined energy sits at 559 (moderate). This is the best of the outlook, no question. After that, the 3rd of September (Thursday) sees a bump to 6 ft from the SW (910 energy), but the wind swings cross-on from the NNW, so it’ll be a bit lumpy. Still, that’s a solid, powerful swell for the experienced crew.
The following week from the 4th to the 10th of September fades back into mostly small, weak, and onshore conditions. Nothing really worth getting excited about, just small leftovers.
So, the short story: you’re waiting ten days for a single, clean morning on the 2nd of September at Big Rock. It’s a long-range call, but the glassy conditions and that reef make it the one to target. The 6 ft swell on the 3rd is worth a look if you don’t mind a bit of cross-breeze.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Fri morning, min 23°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Sat morning, min 21°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | |||||||||||||||
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) | SSW 12 | S 12 | S 10 | SSW 12 | SW 14 | SW 14 | SW 16 | SW 16 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | S 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 494 | 390 | 255 | 193 | 130 | 151 | 169 | 165 | 663 | 589 | 653 | 612 | 424 | 412 | 301 | 247 | 400 | 367 | 343 | 319 | 393 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross | cross-on | cross | glassy | on | on | on | on | on | on | on | on | glassy | on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 9:35AM1.31m | 8:46PM1.84m | 9:55AM1.38m | 9:19PM1.82m | 10:16AM1.46m | 9:52PM1.76m | 10:39AM1.53m | 10:28PM1.64m | 11:04AM1.60m | 11:08PM1.47m | 11:32AM1.65m | 11:54PM1.27m | 12:05PM1.67m | 00:55AM1.06m | |||||||
Low Tide | 2:40PM0.58m | 3:38AM-0.08m | 3:14PM0.49m | 4:01AM-0.05m | 3:49PM0.42m | 4:24AM0.02m | 4:27PM0.36m | 4:47AM0.13m | 5:10PM0.31m | 5:11AM0.27m | 5:59PM0.30m | 5:35AM0.43m | 6:59PM0.30m | ||||||||
 |  |  | | |  | | | | | | | | | | | | | | | | |
 | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — |
 | — | 7:21 | — | — | 7:20 | — | — | 7:19 | — | — | 7:17 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 24 | 24 | 24 | 25 | 24 | 26 | 26 | 25 | 25 | 24 | 23 | 23 | 23 | 22 | 22 | 22 | 21 | 24 | 23 | 22 |
Feels °C | 26 | 24 | 26 | 25 | 26 | 27 | 27 | 27 | 28 | 27 | 24 | 25 | 23 | 22 | 22 | 22 | 21 | 21 | 24 | 22 | 21 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | S 12 | S 10 | SSW 12 | S 9 | SSW 10 | WNW 8 | WNW 8 | SW 17 | SW 16 | SW 16 | W 8 | W 8 | W 8 | W 8 | S 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 12 |
| kJ | 494 | 390 | 255 | 193 | 110 | 120 | 90 | 83 | 663 | 589 | 653 | 168 | 186 | 115 | 115 | 247 | 400 | 367 | 343 | 319 | 393 |
Swell 2 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 15 | S 9 | SSW 11 | SW 14 | S 9 | S 8 | W 7 | W 8 | W 8 | SW 16 | SW 15 | SW 14 | SW 14 | WNW 7 | WNW 6 | W 6 | WNW 5 | WNW 5 | SW 18 |
| kJ | 203 | 193 | 171 | 110 | 95 | 151 | 78 | 51 | 34 | 115 | 115 | 612 | 424 | 412 | 301 | 79 | 43 | 15 | 8 | 5 | 109 |
Swell 3 Height (m) Direction Period (s) | W 6 | W 6 | WNW 7 | SW 14 | SW 14 | W 8 | SW 16 | SW 16 | S 8 | SSW 8 | SSW 8 | S 8 | S 13 | S 12 | S 14 | SW 14 | SW 19 | SW 13 | SW 18 | SW 18 | WNW 5 |
| kJ | 22 | 20 | 15 | 132 | 130 | 43 | 169 | 165 | 34 | 20 | 11 | 4 | 30 | 26 | 196 | 184 | 14 | 63 | 50 | 50 | 6 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 5 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 67 | 18 | 6 | 127 | 3 | 0 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 0 | 18 | 18 | 18 | 18 | 18 | 18 |
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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