Surf Forecasts:
Big Rock surf forecast from 19 Aug 2026:
- Best quality surf: Thursday 20 Aug, 2AM (local time) - 2.5ft (0.7m), 15s period, SW swell with glassy winds.
- Most powerful swell: Wednesday 19 Aug, 11AM (local time) - 2.5ft (0.8m), 16s period, SW swell with 291 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 2AM (local time) - 2.5ft (0.7m), 15s 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 (Aug 20) at 2AM. The primary swell is predicted to be 0.7m and 15s period with a secondary swell of 0.7m and 6s. 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 0.8m 16s and forecast to arrive on Wednesday (Aug 19) at 11AM. 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+) | 2AM (Thu 20th Aug) | 2.5ft (0.7m) 15s |
| Best Surf | 2AM (Thu 20th Aug) | 2.5ft (0.7m) 15s |
| Most Powerful | 11AM (Wed 19th Aug) | 2.5ft (0.8m) 16s |
Table - best surf conditions forecast for Big Rock over the next 16 days.
The Lowdown
Alright, let's talk about Big Rock. Straight up, it's a tough outlook. The swell is small and the wind is mostly on it, so don't expect any magic.
For the whole stretch, we're looking at tiny waves, mostly 0.4m to 1.0m, out of the southwest. The wind is almost always onshore or cross-onshore, which is going to chop up the surface. The combined energy of all swells is mostly in the low to mid hundreds, so it's weak to moderate, but it's not making good waves.
From Wednesday the 19th through the end of August, it's a grind. The swell is there, but the wind is wrong. The periods are long, 13 to 19 seconds, which is groundswell, but with the wind, it's just lumpy. The best you can hope for is a marginal window on Thursday the 20th and Friday the 21st, with 0.6m to 0.7m swell and cross or cross-on wind. It's barely worth it.
There's a little bump on Saturday the 29th and Sunday the 30th of August. The swell hits 1.0m, still from the southwest, and the combined energy gets over 500. Sunday morning (30th August) has a light cross-onshore breeze, which is the best wind we'll see. It's still small, but it's the most likely to have a few rideable ones.
Then, on the first of September, the swell shifts to the west, but the period drops to 8 seconds. That's short-period windswell, and with onshore wind, it's going to be a mess. The energy is moderate, but the quality is poor.
This is a reef break for advanced surfers, and it's not delivering. The water temp is about normal for this time of year. The onshore wind is the main problem. Honestly, the consistent onshore wind might make this spot more interesting for kite surfing than paddle surfing.
The best on offer is the morning of Sunday the 30th of August, with 1.0m southwest swell and a light cross-onshore breeze. It's not great, but it's the best of a bad bunch. The rest of the 16 days is mostly a bust.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Fri morning, min 21°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Sat morning, min 21°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 | SSW 13 | SW 13 | SW 18 | SSW 15 | SW 15 | SW 19 | SSW 13 | SSW 14 | SW 18 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 |
Wave Graph | |||||||||||||||||||||
291 | 291 | 217 | 211 | 211 | 153 | 142 | 114 | 84 | 109 | 142 | 220 | 173 | 154 | 233 | 252 | 137 | 222 | 216 | 206 | 203 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | cross-on | cross-on | cross-on | cross-on | on | glassy | on | on | on | on | on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 2:37PM1.45m | 3:54PM1.43m | 8:26AM1.03m | 5:14PM1.47m | 8:32AM1.09m | 6:16PM1.55m | 8:46AM1.14m | 7:02PM1.65m | 9:01AM1.19m | 7:40PM1.74m | 9:17AM1.24m | 8:14PM1.81m | |||||||||
Low Tide | 11:03PM0.41m | 00:25AM0.30m | 10:32AM1.01m | 1:16AM0.18m | 12:09PM0.97m | 1:53AM0.09m | 12:58PM0.88m | 2:23AM0.01m | 1:35PM0.78m | 2:50AM-0.04m | 2:08PM0.68m | 3:14AM-0.07m | |||||||||
6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | |
— | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:25 | — | — | 7:24 | — | — | 7:23 | — | — | 7:22 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 22 | 22 | 22 | 21 | 23 | 23 | 22 | 24 | 23 | 23 | 24 | 23 | 22 | 24 | 23 | 22 | 24 | 23 | 22 |
Feels °C | 23 | 22 | 24 | 23 | 22 | 23 | 24 | 23 | 24 | 24 | 23 | 24 | 24 | 23 | 23 | 24 | 23 | 22 | 24 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | W 7 | W 7 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 | SSW 13 | SW 13 | SW 12 | SSW 15 | SW 15 | SSW 13 | SSW 13 | SSW 14 | SW 18 | SSW 14 | W 6 | WNW 6 | SW 16 | WNW 6 |
77 | 61 | 217 | 211 | 211 | 153 | 142 | 114 | 84 | 51 | 142 | 220 | 114 | 154 | 233 | 252 | 131 | 43 | 39 | 206 | 58 | |
Swell 2 Height (m) Direction Period (s) | SW 16 | SW 16 | W 6 | W 6 | W 6 | WNW 7 | WNW 6 | WNW 6 | WNW 6 | WNW 6 | WNW 6 | WNW 6 | W 6 | W 6 | SW 18 | W 6 | SW 17 | SW 17 | SW 16 | SSW 13 | SW 16 |
291 | 291 | 38 | 28 | 19 | 15 | 13 | 13 | 7 | 14 | 13 | 12 | 19 | 18 | 155 | 22 | 137 | 222 | 216 | 96 | 203 | |
Swell 3 Height (m) Direction Period (s) | SW 20 | S 8 | W 14 | SW 19 | W 13 | WNW 12 | SW 18 | SW 17 | SSW 16 | SW 18 | SW 12 | SW 19 | SW 19 | SW 18 | WNW 10 | SSW 14 | S 9 | SSW 13 | SSW 13 | W 18 | SSW 13 |
16 | 1 | 14 | 57 | 13 | 27 | 82 | 73 | 50 | 109 | 37 | 58 | 173 | 152 | 9 | 120 | 6 | 118 | 135 | 24 | 90 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 5 | — | W 6 | — | — | WNW 6 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 20 | — | 23 | — | — | 43 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 18 | 18 | 0 | 66 | 211 | 30 | 150 | 18 | 0 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 66 | 18 | 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.











