Surf Forecasts:
Blacks Beach surf forecast from 31 Aug 2026:
- Best quality surf: Thursday 3 Sep, 2AM (local time) - 2.5ft (0.7m), 17s period, SW swell with glassy winds.
- Most powerful swell: Friday 4 Sep, 11PM (local time) - 4.5ft (1.3m), 16s period, SSW swell with 798 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 2AM (local time) - 2.5ft (0.7m), 17s period with SW swell.
Best Forecast Surf Conditions for Blacks Beach this week:
The surf forecast for Blacks Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 03) at 2AM. The primary swell is predicted to be 0.7m and 17s period with a secondary swell of 0.8m and 6s. Another secondary swell of 0.8m and 12s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Blacks Beach in the next 16 days are 1.3m 16s and forecast to arrive on Friday (Sep 04) at 11PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 14s period and expected on Monday (Sep 07) at 5AM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Thu 3rd Sep) | 2.5ft (0.7m) 17s |
| Best Surf | 2AM (Thu 3rd Sep) | 2.5ft (0.7m) 17s |
| Most Powerful | 11PM (Fri 4th Sep) | 4.5ft (1.3m) 16s |
Table - best surf conditions forecast for Blacks Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's look at what Blacks Beach is cooking up for the next couple of weeks. I'll level with you, it's a bit of a waiting game.
Right now, at the end of August and heading into September, it's quiet. We've got small, weak swell – the energy is only around 313 to start, and it tails off. The water is 76° – that's about 8° warmer than normal, very unusual. Feels like a warm bath. But most of this first week looks like poor conditions. The swell is from the SSW, but the wind is onshore out of the west, and the wave comments keep saying "poor surf conditions" with scores of 0 out of 10. Nothing to get excited about.
We get a hint on Thursday, September 3rd afternoon. The swell bumps to 3ft from the SSW, with a solid 18-second period – long-period groundswell starting to push. Energy hits 730. But the wind is still onshore. It's only "marginal".
Friday, September 4th gets a little better. Swell builds to 4ft from the SSW, period at 16 seconds, energy up at 764. Still onshore, so it's not clean.
Then comes Monday morning, September 7th. This is the standout. Swell is only about 3ft from the SSW, but the wind goes glassy from the SSW at just 3 mph. The comment says "expect good surf conditions", "glassy". For an exposed spot like Blacks, a glassy day is gold. The water will still be warm, and those long-period lines will be clean and rideable. Not big, but the best quality of the whole forecast.
That afternoon on the 7th, the wind swings onshore again, and we get a 5ft, 6-second windswell – short, choppy, not worth it. After that, it's back to small, onshore, poor conditions through mid-September. The energy stays moderate, but the quality is gone.
So, save your energy for that Monday the 7th. Get out for a dawn patrol in the glassy, small but clean lines. That's your one real shot.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Mon morning, min 20°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Sat afternoon, min 20°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SW 16 | SSW 13 | SW 17 | SW 16 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 257 | 161 | 156 | 116 | 114 | 92 | 132 | 242 | 302 | 196 | 547 | 651 | 587 | 717 | 674 | 512 | 512 | 367 | 344 | 339 | 283 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | on | cross-on | cross-on | on | on | glassy | on | on | cross | cross-on | on | glassy | cross-on | on | cross | cross | cross | cross-on |
High Tide | 11:32AM1.65m | 11:54PM1.27m | 12:05PM1.67m | 00:55AM1.06m | 12:47PM1.67m | 2:36AM0.89m | 1:44PM1.64m | 3:09PM1.63m | 7:22AM1.02m | 4:44PM1.68m | 7:45AM1.14m | 6:01PM1.78m | |||||||||
Low Tide | 5:59PM0.30m | 5:35AM0.43m | 6:59PM0.30m | 5:59AM0.60m | 8:20PM0.30m | 6:22AM0.75m | 10:05PM0.25m | 11:38PM0.12m | 9:52AM0.98m | 00:42AM-0.03m | 11:47AM0.90m | 1:30AM-0.14m | |||||||||
 | |  | | | | | | | | | | | | | |  |  |  |  |  | |
 | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — |
 | — | 7:15 | — | — | 7:14 | — | — | 7:13 | — | — | 7:10 | — | — | 7:09 | — | — | 7:08 | — | — | 7:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 44 | 22 |
Temp °C | 23 | 23 | 22 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 22 | 22 | 21 | 23 | 24 | 24 | 24 | 22 | 23 |
Feels °C | 23 | 22 | 22 | 23 | 21 | 21 | 21 | 20 | 21 | 22 | 20 | 22 | 21 | 20 | 22 | 23 | 23 | 24 | 26 | 21 | 23 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 12 | S 11 | S 11 | S 10 | W 5 | W 6 | SSW 13 | W 6 | W 7 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | S 13 | S 14 | S 14 | S 15 | S 15 | S 14 |
| kJ | 255 | 228 | 151 | 114 | 106 | 37 | 35 | 242 | 47 | 92 | 547 | 651 | 587 | 717 | 674 | 440 | 694 | 1191 | 1546 | 1589 | 1691 |
Swell 2 Height (m) Direction Period (s) | W 7 | SSW 14 | SSW 13 | W 6 | SSW 13 | SSW 13 | SSW 11 | SW 16 | SSW 12 | SSW 11 | W 6 | W 6 | W 7 | W 6 | S 14 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 15 |
| kJ | 56 | 161 | 156 | 33 | 114 | 92 | 73 | 129 | 156 | 148 | 60 | 47 | 72 | 47 | 405 | 512 | 512 | 367 | 344 | 339 | 283 |
Swell 3 Height (m) Direction Period (s) | SSW 14 | SW 19 | W 6 | SSW 13 | SW 18 | S 9 | SW 16 | SSW 20 | SW 17 | SW 16 | SSW 10 | SSW 10 | SW 10 | SSE 15 | W 6 | W 6 | W 6 | SW 10 | WNW 6 | W 12 | WNW 5 |
| kJ | 257 | 56 | 30 | 116 | 80 | 41 | 132 | 41 | 302 | 196 | 55 | 36 | 54 | 179 | 22 | 28 | 29 | 15 | 14 | 3 | 17 |
Wind waves Height (m) Direction Period (s) | — | W 6 | — | — | W 6 | — | — | W 6 | — | — | WNW 6 | — | — | — | — | — | — | W 6 | — | NW 3 | — |
| kJ | — | 36 | — | — | 32 | — | — | 34 | — | — | 68 | — | — | — | — | — | — | 17 | — | 8 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 27 | 26 | 17 | 26 | 27 | 26 | 26 | 27 | 0 | 27 | 186 | 5 | 145 | 27 | 0 | 26 | 26 | 11 | 26 | 58 | 74 |
Best forecast wave conditions in San Diego County | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Blacks Beach Surf forecast
The above surf forecast table for Blacks Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Blacks Beach can be found by selecting the local surf guide option on the grey menu. Our Blacks Beach 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 (Blacks Beach) 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 Blacks Beach 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.
Blacks Beach is 13 km (8 miles) from the city of 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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