Surf Forecasts:
Blacks Beach surf forecast from 20 Aug 2026:
- Best quality surf: Monday 24 Aug, 8AM (local time) - 2ft (0.6m), 18s period, SW swell with glassy winds.
- Most powerful swell: Wednesday 26 Aug, 11PM (local time) - 5ft (1.6m), 14s period, SSW swell with 1,106 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 8PM (local time) - 2.5ft (0.8m), 14s period with SSW 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 (Aug 20) at 8PM. The primary swell is predicted to be 0.8m and 14s period with a secondary swell of 0.6m and 6s. 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 1.6m 14s and forecast to arrive on Wednesday (Aug 26) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 16s period and expected on Wednesday (Aug 26) at 2PM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Thu 20th Aug) | 2.5ft (0.8m) 14s |
| Best Surf | 8AM (Mon 24th Aug) | 2ft (0.6m) 18s |
| Most Powerful | 11PM (Wed 26th Aug) | 5ft (1.6m) 14s |
Table - best surf conditions forecast for Blacks Beach over the next 16 days.
The Lowdown
Alright, Rusty here.
We’ve got a waiting game on our hands at Blacks Beach. The next 16 days are looking pretty flat, so don’t hold your breath for anything decent just yet. The first few days are a total write-off with tiny swell and poor conditions, but we do have a few pulses of energy late in the run that could be worth keeping an eye on. For the first week or so, you’re basically looking at knee-high dribble with light offshore winds. It’s clean, but there’s just nothing to ride. The water temp is sitting at 21°, which is a touch warmer than usual for this time of year, so at least it’s not freezing while you’re sitting there waiting.
The first real sign of life appears around Wednesday the 26th of August. We get a jump in swell from the SSW, bumping up to 3 ft early, and then pushing to 5 ft by the afternoon. The combined energy is moderate to strong, hitting 619 and then 1052, but the period is short at 13 seconds and the wind is cross-onshore, so it’s not going to be pristine. The morning of the 27th looks cleaner with a cross-shore breeze and a 4 ft SSW swell, but the quality is still marginal.
The standout is shaping up to be the afternoon of Thursday the 27th of August and then into the weekend. On Thursday afternoon, we’ve got 5 ft of SSW swell with a 14-second period and light cross-onshore wind. Combined energy is strong at 1048. It’s the first real push of size and power, and while the wind isn’t perfect, it’s manageable. For experienced surfers, this is where it gets interesting. The water will be a bit jumbled, but there’s enough there to make it worthwhile.
Then, Saturday the 29th of August is the pick of the whole run. The morning has 4 ft from the SSW with a 17-second period, cross-shore breeze, and combined energy of 994. The afternoon bumps up to 4 ft, 16 seconds, and energy of 1109. That long period is a classic groundswell – it’ll wrap nicely into Blacks Beach, but be mindful that a long-period SSW swell at an exposed beach break like this can get a bit shifty and close out. Still, for the advanced crew, this is the best chance for a proper session. It’s a clean, offshore wind at 6 mph in the morning, so the conditions are about as good as we’re going to get.
After that, it drops off again. Monday the 31st sees a return to small, weak surf, and the rest of the run stays marginal. There’s a brief uptick on the morning of the 4th of September with 5 ft from the WNW, but the period is short at 9 seconds, so it’ll be fat and messy.
Overall, the first week is a bust. The end of August and very start of September offer a few clean, punchy days if you’re patient. The real highlight is Saturday the 29th – that’s the one to circle on the calendar. It won’t be epic, but it’s the best we’ve got.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Sat morning, min 21°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Sun morning, min 22°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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 14 | SSW 13 | SSW 13 | SW 17 | SW 18 | SSW 14 | SSW 15 | SW 19 | SW 18 | SSW 14 | SW 18 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SSW 16 | SSW 13 | SSW 14 |
Wave Graph | |||||||||||||||||||||
239 | 236 | 170 | 156 | 137 | 98 | 90 | 239 | 222 | 224 | 197 | 273 | 194 | 177 | 330 | 264 | 208 | 203 | 525 | 958 | 1106 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | on | on | glassy | on | on | glassy | on | on | cross-on | on | on | cross-on | on | on | cross-on | cross-on | cross-on | cross |
High Tide | 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 | 9:35AM1.31m | 8:46PM1.84m | ||||||||
Low Tide | 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 | 2:40PM0.58m | 3:38AM-0.08m | ||||||||
6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | |
— | 7:29 | — | — | 7:27 | — | — | 7:25 | — | — | 7:24 | — | — | 7:23 | — | — | 7:22 | — | — | 7:21 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 23 | 22 | 24 | 24 | 22 | 25 | 24 | 23 | 25 | 25 | 23 | 25 | 25 | 23 | 25 | 25 | 24 | 25 | 24 | 23 |
Feels °C | 24 | 24 | 24 | 25 | 24 | 24 | 26 | 24 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 24 | 26 | 25 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | W 7 | SSW 14 | SSW 15 | W 7 | W 6 | SSW 14 | W 6 | SW 17 | WNW 6 | WNW 6 | S 13 | W 7 | S 13 | SSW 13 | SSW 14 |
239 | 236 | 170 | 156 | 137 | 98 | 44 | 239 | 222 | 57 | 38 | 273 | 38 | 177 | 60 | 70 | 225 | 152 | 563 | 958 | 1106 | |
Swell 2 Height (m) Direction Period (s) | W 6 | W 6 | W 6 | W 6 | W 6 | W 6 | SSW 13 | W 6 | W 6 | SSW 13 | SSW 13 | W 6 | SW 18 | SSW 13 | SW 17 | SW 16 | SW 16 | S 13 | W 7 | W 7 | W 7 |
38 | 29 | 18 | 28 | 19 | 17 | 90 | 40 | 36 | 98 | 135 | 31 | 194 | 93 | 330 | 264 | 208 | 480 | 94 | 57 | 97 | |
Swell 3 Height (m) Direction Period (s) | SW 19 | WNW 13 | WNW 12 | SW 18 | SSW 16 | SW 17 | SW 18 | SW 19 | WNW 9 | SW 19 | SW 18 | SW 18 | SSW 12 | S 15 | S 13 | S 13 | W 18 | SW 16 | SSW 16 | W 14 | W 13 |
57 | 16 | 28 | 81 | 51 | 77 | 82 | 57 | 15 | 224 | 197 | 255 | 87 | 38 | 126 | 128 | 24 | 203 | 525 | 37 | 31 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 6 | — | — | WNW 6 | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | 51 | — | — | 100 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 27 | 27 | 5 | 27 | 27 | 0 | 26 | 26 | 0 | 26 | 26 | 19 | 27 | 26 | 9 | 27 | 27 | 11 | 5 | 199 | 5 |
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.











