Surf Forecasts:
Big Rock surf forecast from 10 Sep 2026:
- Best quality surf: Thursday 10 Sep, 8AM (local time) - 3ft (0.9m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 10 Sep, 2PM (local time) - 3.5ft (1.0m), 16s period, SW swell with 498 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 8AM (local time) - 3ft (0.9m), 16s 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 8AM. The primary swell is predicted to be 0.9m and 16s period with a secondary swell of 0.4m and 12s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Big Rock in the next 16 days are 1.0m 16s and forecast to arrive on Thursday (Sep 10) at 2PM. 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 (Thu 10th Sep) | 3ft (0.9m) 16s |
| Best Surf | 8AM (Thu 10th Sep) | 3ft (0.9m) 16s |
| Most Powerful | 2PM (Thu 10th Sep) | 3.5ft (1.0m) 16s |
Table - best surf conditions forecast for Big Rock over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s get into it. To be straight with you, Big Rock is the only spot on the cards for this whole 16-day window, and honestly, it’s a tough stretch. We are looking at very marginal, poor surf with no standout sessions. Conditions are likely to be pretty average for this time of year.
For the first half of this outlook, we’ve got a long dry spell. From now through the rest of the week and into next week, it’s grumpy. The swell is small, hovering between 1.3 ft and 3.9 ft. The wind is mostly cross or cross-onshore, creating chop. There’s one morning on the 10th of September (Thursday morning) where the swell has moderate energy (507), and the wind is cross-shore, but the forecast still says the surf is marginal. The swell direction is mainly SW, right off the optimum for Big Rock, with a very long period of 16 seconds which is good for this reef setup, but it’s just not enough size to get excited about.
There is a real gap in quality. From the 10th of September right through the end of the first week, the scores are bottomed out. It’s a run of poor surf and questionable tides. The water is about average for the time of year.
Moving into the second week, things don't improve much. Again, all the surf remains below the 3.3 ft mark through the 24th and 25th of September. There is a slight uptick in combined energy towards the 20th and 21st, hitting up to 576 and 648 (moderate energy), but the wind stays stubbornly cross-onshore or onshore. The swell period does get very long again, between 17 and 18 seconds on the 18th through the 20th, which is groundswell, but it’s small and the wind just ruins it.
Honestly, the whole 16-day run looks better for other things. If the wind holds like this and the swell stays this weak, the setup is more interesting for kite surfing than paddle surfing. There are no hidden gems here. It’s a blank run for quality surf, but that’s not unusual for this area when the conditions line up like this.
That’s the story. Keep checking back. Forecasts can change.
Short Range ForecastLight rain (total 2mm), mostly falling on Wed night. Warm (max 25°C on Wed night, min 21°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 21°C on Sun morning, min 20°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 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 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 | W 8 | W 9 | W 8 | W 10 | SW 17 | SW 16 | SSW 20 | SW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 342 | 443 | 416 | 411 | 395 | 365 | 301 | 248 | 200 | 158 | 134 | 138 | 235 | 195 | 220 | 147 | 161 | 149 | 121 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross | cross | cross-on | cross-on | on | on | on | cross-on | cross-on | cross | cross | cross-on | cross | cross-on | cross-on | glassy |
High Tide | 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 | 11:22AM1.67m | 00:17AM1.15m | 11:51AM1.60m | 1:23AM0.98m | ||||||
Low Tide | 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 | 5:04AM0.45m | 6:10PM0.23m | 5:24AM0.62m | 7:05PM0.30m | |||||||
 |  | |  | | | | | | | | | | | | | | | | |
 | — | 6:28 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:31 | — | — |
 | — | — | 7:01 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:54 | — |
mm | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 24 | 23 | 22 | 23 | 22 | 21 | 21 | 20 | 21 | 21 | 20 | 21 | 21 | 20 | 21 | 21 | 20 |
Feels °C | 27 | 26 | 24 | 24 | 22 | 23 | 24 | 23 | 20 | 21 | 21 | 20 | 21 | 20 | 19 | 20 | 21 | 20 | 21 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | W 6 | W 6 | SW 14 | W 6 | W 7 | W 8 | W 9 | W 8 | W 10 | W 9 | W 9 | W 9 | W 8 |
| kJ | 342 | 443 | 416 | 411 | 395 | 365 | 59 | 49 | 200 | 81 | 134 | 138 | 235 | 195 | 220 | 97 | 104 | 101 | 49 |
Swell 2 Height (m) Direction Period (s) | SSW 12 | SSW 12 | W 6 | W 6 | W 7 | W 7 | SW 15 | SW 14 | S 9 | SW 14 | SW 13 | SW 13 | SW 13 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 |
| kJ | 56 | 56 | 17 | 24 | 57 | 56 | 301 | 248 | 27 | 158 | 113 | 109 | 61 | 150 | 150 | 147 | 161 | 121 | 121 |
Swell 3 Height (m) Direction Period (s) | SW 8 | WNW 5 | SSW 12 | SSW 11 | SSW 10 | W 13 | SSW 9 | S 9 | W 13 | S 9 | S 8 | SW 16 | WSW 19 | SW 13 | SW 12 | SW 12 | SW 12 | SSW 20 | SW 18 |
| kJ | 30 | 8 | 54 | 22 | 20 | 14 | 17 | 16 | 32 | 13 | 13 | 67 | 142 | 60 | 55 | 38 | 37 | 149 | 83 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | W 6 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 47 | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 3 | 3 | 3 | 4 | 66 | 3 | 18 | 18 | 18 | 18 | 3 | 67 | 3 | 150 | 3 | 3 | 3 | 18 | 0 |
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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