Surf Forecasts:
Big Rock surf forecast from 27 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 763 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 11PM (local time) - 3ft (0.9m), 10s period with SSW 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 (Aug 27) at 11PM. The primary swell is predicted to be 0.6m and 14s period with a secondary swell of 0.9m and 10s. 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 glassy at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Thu 27th Aug) | 3ft (0.9m) 10s |
| 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, let’s talk Big Rock. This is a reef break, advanced only, and the water is about 74°F, which is way warmer than usual for this time of year – feels like a bathtub.
The forecast is a long, slow grind. Most of the next two weeks is marginal to poor, with a lot of sideshore breeze and small, weak swell. The first real hope comes on Saturday, August 29th. The morning shows a 4ft SW swell with a 16-second period and offshore wind from the west. The combined energy is 695 (moderate), and that long period means it’s a proper groundswell – good for the reef. It’s clean, but even then, it’s just “marginal.”
The wind stays offshore through the weekend, with swell holding around 3 to 4ft and moderate energy in the 600s. These are the best couple of days, but crowds are often an issue here.
The standout window is Thursday, September 3rd. The morning brings a 5ft SW swell (combined energy 741 – moderate), offshore wind from the west, and a 12-second period. That’s a solid, pushy size for an advanced reef, and the offshore wind will keep it glassy. It’s the biggest swell of the whole period, and the conditions are good.
The next morning, Friday, September 4th, is also worth a look. The swell drops to 3ft but the period jumps to 17 seconds – very long groundswell. The wind is light offshore from the WSW, and combined energy is 811 (moderate). That long period will bring some powerful, wedgy lines, but it might be a bit too straight for the reef. Still, it’s clean.
After that, the second week turns into a mix of onshore wind and smaller, weaker swell. The combined energy drops into the 300-500 range, and the wind is mostly sideshore. Thursday, September 10th and Friday, September 11th have some offshore wind, but the swell is small and the period is moderate. Nothing to write home about.
So, the call is: Saturday, August 29th through Monday, August 31st for cleaner, mid-sized surf with offshore winds, and the biggest, most powerful session will be on the morning of Thursday, September 3rd. After that, it’s a waiting game.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Thu afternoon, min 22°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Tue night. Warm (max 24°C on Tue morning, min 18°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
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 | SW 14 | SW 18 | SW 16 | SW 16 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | S 13 | SSW 12 | SSW 12 | SSW 11 | SSW 10 | SSW 12 | SSW 11 | SSW 12 | SW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 193 | 130 | 192 | 169 | 165 | 763 | 589 | 653 | 612 | 424 | 412 | 301 | 255 | 400 | 220 | 156 | 136 | 187 | 285 | 353 | 668 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | cross-on | cross-on | glassy | on | on | cross-on | on | on | glassy | on | on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 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 | 12:47PM1.67m | 2:36AM0.89m | |||||||
Low Tide | 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 | 5:59AM0.60m | 8:20PM0.30m | ||||||||
 | |  |  | | | | | | | | | | |  | |  |  | | | | |
 | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — |
 | — | 7:20 | — | — | 7:19 | — | — | 7:17 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | — | 7:13 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 24 | 25 | 24 | 25 | 25 | 24 | 25 | 24 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 24 | 23 | 21 | 23 | 23 | 23 |
Feels °C | 26 | 27 | 26 | 28 | 26 | 26 | 26 | 24 | 24 | 22 | 22 | 22 | 22 | 21 | 22 | 24 | 21 | 20 | 22 | 20 | 21 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | S 9 | SSW 10 | S 9 | S 8 | SW 17 | SW 16 | SW 16 | SW 16 | W 8 | W 8 | W 8 | S 13 | SSW 12 | SSW 12 | SSW 11 | SSW 10 | SSW 12 | SSW 11 | SSW 12 | SW 13 |
| kJ | 193 | 110 | 120 | 78 | 51 | 763 | 589 | 653 | 612 | 190 | 118 | 142 | 255 | 400 | 220 | 156 | 136 | 187 | 285 | 353 | 668 |
Swell 2 Height (m) Direction Period (s) | S 9 | SSW 11 | SW 14 | SW 16 | WNW 8 | W 7 | WNW 7 | WNW 7 | W 8 | SW 15 | SW 14 | SW 14 | WNW 7 | SSW 15 | W 6 | W 5 | SW 13 | S 9 | SW 16 | SW 16 | W 10 |
| kJ | 110 | 95 | 151 | 169 | 49 | 37 | 86 | 89 | 138 | 424 | 412 | 301 | 79 | 21 | 22 | 14 | 85 | 58 | 169 | 165 | 2 |
Swell 3 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 18 | SW 13 | SW 16 | S 8 | SSW 8 | SSW 8 | S 8 | S 13 | S 12 | S 14 | SW 14 | WSW 19 | SW 13 | SW 13 | WNW 5 | SW 18 | WNW 5 | SSE 9 | S 15 |
| kJ | 132 | 130 | 192 | 144 | 165 | 34 | 20 | 19 | 4 | 29 | 45 | 194 | 184 | 36 | 113 | 87 | 9 | 109 | 4 | 17 | 17 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 6 | — | — | — | — | — | WNW 3 | WNW 4 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 56 | — | — | — | — | — | 2 | 5 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 127 | 18 | 0 | 127 | 211 | 0 | 150 | 18 | 18 | 18 | 18 | 0 | 18 | 18 | 4 | 18 | 18 | 1 | 18 | 18 | 1 |
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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