Surf Forecasts:
Big Rock surf forecast from 30 Jul 2026:
- Best quality surf: Thursday 30 Jul, 11PM (local time) - 4.5ft (1.3m), 14s period, SSW swell with glassy winds.
- Most powerful swell: Thursday 30 Jul, 2PM (local time) - 4.5ft (1.3m), 14s period, SSW swell with 697 kJ wave energy.
- Next surfable swell (1★+): Thursday 30 Jul, 11PM (local time) - 4.5ft (1.3m), 14s 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 (Jul 30) at 11PM. The primary swell is predicted to be 1.3m and 14s period with a secondary swell of 0.5m and 9s. 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 1.3m 14s and forecast to arrive on Thursday (Jul 30) at 2PM. 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 (Thu 30th Jul) | 4.5ft (1.3m) 14s |
| Best Surf | 11PM (Thu 30th Jul) | 4.5ft (1.3m) 14s |
| Most Powerful | 2PM (Thu 30th Jul) | 4.5ft (1.3m) 14s |
Table - best surf conditions forecast for Big Rock over the next 16 days.
The Lowdown
Rusty here again, giving you the same outlook for Big Rock, but in feet and Fahrenheit.
So, for the next 16 days at Big Rock, I’m sorry to say, there’s not a whole lot to get out of bed for. It’s a quiet spell with small waves and tricky conditions, and no day really stands out.
Kicking off on Thursday, July 30th, we’ve got a small 4ft SSW swell rolling in at 15 seconds – that’s proper long period groundswell, which works well on the reef. The energy is moderate (718), and the wind is light offshore out of the WNW, keeping things glassy. The water is 75°, which is way warmer than what you’d expect at this time of year by about 7°. Even with clean conditions, the forecast says it’s only marginal. Friday the 31st is a repeat – 4ft swell in the morning with that nice light offshore wind, clean but still just okay. By Friday afternoon it fades to 3ft, and it’s all downhill from there.
From Saturday, August 1st, all the way through to Friday the 14th, we’re looking at waves that barely hit 3ft. The combined energy drops into the low hundreds – weak stuff. The wind is mostly light and either cross-onshore or light offshore, but it doesn’t matter because there’s just no power. Midway through the second week, the period jumps to 19 seconds on Friday the 7th – a very long groundswell – but with only 2ft of height on tap, it’s a tease.
So, to be honest: the first two mornings are your best, but still marginal, bet with clean conditions and a bit of waist-chest high groundswell. After that, it’s a whole lot of nothing for two solid weeks. Not a beginner hazard because it’s small, and not an expert draw because it’s flat. A blank stretch like this is pretty normal for a spot like Big Rock when the swells don’t line up.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Sat morning, min 19°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Sun afternoon, min 21°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | |||||||||||||||
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 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SW 14 | SW 12 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 16 | SW 15 | WSW 15 | SW 14 | WSW 14 | SW 14 | SW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 523 | 697 | 631 | 561 | 232 | 153 | 149 | 116 | 142 | 111 | 108 | 132 | 100 | 102 | 72 | 113 | 86 | 167 | 134 | 97 | 158 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | glassy | on | on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | cross-on | cross-on | cross | cross-on | on | cross-on |
High Tide | 11:08AM1.25m | 10:08PM1.82m | 11:34AM1.30m | 10:41PM1.73m | 12:01PM1.36m | 11:17PM1.58m | 12:30PM1.41m | 11:57PM1.40m | 1:02PM1.47m | 00:49AM1.18m | 1:42PM1.53m | 2:06AM0.96m | 2:32PM1.58m | 4:22AM0.83m | |||||||
Low Tide | 4:01PM0.63m | 5:08AM-0.10m | 4:39PM0.61m | 5:34AM-0.02m | 5:22PM0.59m | 5:59AM0.09m | 6:13PM0.58m | 6:25AM0.24m | 7:15PM0.55m | 6:51AM0.40m | 8:36PM0.51m | 7:21AM0.57m | 10:17PM0.39m | ||||||||
 | |  | | | | | | | | | | | | | | | |  | | | |
 | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — |
 | — | 7:49 | — | — | 7:47 | — | — | 7:46 | — | — | 7:46 | — | — | 7:45 | — | — | 7:45 | — | — | 7:44 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 20 | 22 | 23 | 22 | 24 | 23 | 22 | 22 | 23 | 22 | 23 | 22 | 21 | 22 | 22 | 22 | 22 | 22 | 21 |
Feels °C | 22 | 22 | 21 | 22 | 23 | 23 | 25 | 23 | 23 | 23 | 23 | 23 | 24 | 22 | 22 | 22 | 21 | 23 | 24 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 10 | W 7 | W 8 | SSW 10 | W 8 | W 8 | W 9 | W 8 | W 8 | W 9 | W 6 | W 6 | SW 14 | WSW 14 | SW 14 | SW 14 |
| kJ | 523 | 697 | 631 | 561 | 232 | 104 | 54 | 57 | 86 | 74 | 80 | 96 | 78 | 68 | 55 | 29 | 20 | 167 | 134 | 97 | 158 |
Swell 2 Height (m) Direction Period (s) | S 13 | W 6 | W 9 | W 8 | SSW 11 | SW 14 | SW 12 | SSW 11 | W 7 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 15 | WSW 15 | W 6 | W 6 | SW 11 | W 6 |
| kJ | 162 | 21 | 41 | 29 | 153 | 153 | 149 | 103 | 52 | 111 | 108 | 132 | 100 | 98 | 72 | 113 | 86 | 22 | 13 | 20 | 12 |
Swell 3 Height (m) Direction Period (s) | W 7 | WNW 7 | — | W 8 | W 8 | W 8 | S 9 | SW 14 | SW 13 | SSW 9 | SSW 8 | SW 18 | SW 16 | WSW 16 | SW 16 | SW 12 | SW 12 | S 9 | SSW 12 | S 9 | S 9 |
| kJ | 33 | 35 | — | 32 | 29 | 31 | 41 | 116 | 142 | 32 | 28 | 79 | 68 | 102 | 66 | 53 | 50 | 7 | 15 | 6 | 6 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 6 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 14 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 18 | 18 | 0 | 18 | 18 | 13 | 18 | 18 | 4 | 66 | 18 | 66 | 127 | 211 | 0 | 150 | 150 | 6 | 150 | 18 | 10 |
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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