Surf Forecasts:
Blacks Beach surf forecast from 17 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 2AM (local time) - 3ft (0.9m), 14s period, SSW swell with glassy winds.
- Most powerful swell: Sunday 16 Aug, 8PM (local time) - 3.5ft (1.0m), 14s period, SSW swell with 437 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 2AM (local time) - 3ft (0.9m), 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 Tuesday (Aug 18) at 2AM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 0.9m 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 1.0m 14s and forecast to arrive on Sunday (Aug 16) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 10s period and expected on Sunday (Aug 16) at 8PM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 18th Aug) | 3ft (0.9m) 14s |
| Best Surf | 2AM (Tue 18th Aug) | 3ft (0.9m) 14s |
| Most Powerful | 8PM (Sun 16th Aug) | 3.5ft (1.0m) 14s |
Table - best surf conditions forecast for Blacks Beach over the next 16 days.
The Lowdown
Alright, listen up. Rusty here with the full picture for the next couple of weeks. It’s not looking like a classic stretch, so let’s break it down.
The first chance you’ll get is this Sunday morning, August 16th. Blacks Beach has a small, clean pulse coming in. Swell is around 3ft from the SSW with a long 15-second period, so there's some proper energy behind it even if the height is down. The energy reading is at 519, so it's not nothing. The wind is a light offshore from the WNW, so it should be glassy early. Water temp is a very unusual 73°F, which is way warmer than it should be, so you can probably get away with a thinner suit. That’s the highlight of this first part. But by the afternoon, it gets cross-on and choppy, so get your waves early. The rest of the week is pretty flat and messy, with weak swells and not much to get excited about.
For several days after that, it's a grind. The swell drops off to less than 3ft, the period shortens, and the wind keeps messing with the surface. Plenty of poor and marginal calls in there. The energy stays in the weak to moderate range, and the waves just aren’t coming together. You’re not missing much.
But, hold on. Looking deeper into the forecast, there’s a bit of a glimmer on Saturday, August 29th. The swell builds back to around 3ft from the SSW, with a solid 15-16 second period. The energy jumps up into the strong range, hitting 612 and then 655. This is the most promising window in the whole forecast. It’s still not big, but the combo of longer period and light offshore winds could make for some real clean, lined-up waves. That could be the pick of the fortnight, but it’s a long way out, so treat it as promising, not a sure thing.
So, you’ve got two possible windows: Sunday morning the 16th, and then that Saturday the 29th. In between, the ocean is going to be pretty quiet and uninviting. It's a good time to work on your pop-up or just enjoy the sun.
Keep it salty.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Mon afternoon, min 19°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Wed afternoon, min 21°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 16 | SSW 17 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SW 18 | SSW 14 | SSW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 493 | 443 | 367 | 367 | 264 | 316 | 232 | 243 | 339 | 382 | 387 | 242 | 236 | 236 | 170 | 156 | 137 | 98 | 92 | 239 | 222 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | on | cross-on | glassy | on | on | glassy | on | on | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | cross |
High Tide | 12:24PM1.56m | 00:31AM1.27m | 1:01PM1.54m | 1:34AM1.04m | 1:42PM1.49m | 3:28AM0.88m | 2:37PM1.45m | 3:54PM1.43m | 8:26AM1.03m | 5:14PM1.47m | 8:32AM1.09m | 6:16PM1.55m | |||||||||
Low Tide | 6:41PM0.41m | 6:27AM0.42m | 7:47PM0.45m | 6:50AM0.62m | 9:15PM0.47m | 7:07AM0.79m | 11:03PM0.41m | 00:25AM0.30m | 10:32AM1.01m | 1:16AM0.18m | 12:09PM0.97m | 1:53AM0.09m | |||||||||
 | |  | | | | | | | |  | | | | | | |  | |  |  | |
 | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — |
 | — | 7:32 | — | — | 7:31 | — | — | 7:30 | — | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:25 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 20 | 21 | 21 | 22 | 23 | 22 | 23 | 23 | 21 | 23 | 24 | 22 | 24 | 23 | 22 | 23 | 24 | 23 | 25 | 24 | 23 |
Feels °C | 20 | 20 | 21 | 22 | 22 | 23 | 24 | 22 | 22 | 23 | 25 | 24 | 25 | 23 | 24 | 24 | 24 | 25 | 26 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | W 6 | W 7 | W 7 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 14 | SSW 15 |
| kJ | 493 | 443 | 367 | 367 | 264 | 62 | 74 | 57 | 339 | 382 | 387 | 242 | 236 | 236 | 170 | 156 | 137 | 98 | 92 | 239 | 222 |
Swell 2 Height (m) Direction Period (s) | W 5 | S 10 | W 5 | W 6 | SSW 18 | SSW 14 | SSW 16 | SSW 17 | W 6 | W 7 | W 6 | W 5 | W 6 | W 6 | W 5 | W 6 | WNW 6 | W 6 | WNW 6 | WNW 6 | W 10 |
| kJ | 12 | 18 | 28 | 34 | 32 | 316 | 232 | 243 | 51 | 61 | 39 | 21 | 18 | 18 | 13 | 19 | 12 | 6 | 13 | 13 | 50 |
Swell 3 Height (m) Direction Period (s) | S 11 | W 11 | S 10 | S 10 | S 10 | S 10 | SSW 13 | SSW 13 | SW 19 | SW 20 | W 14 | SW 18 | SW 19 | WNW 13 | WNW 12 | SW 18 | SSW 16 | SW 17 | SW 18 | SW 19 | SW 19 |
| kJ | 20 | 9 | 8 | 8 | 8 | 7 | 114 | 98 | 15 | 16 | 4 | 50 | 56 | 16 | 27 | 81 | 51 | 47 | 82 | 57 | 58 |
Wind waves Height (m) Direction Period (s) | WNW 5 | W 5 | — | — | W 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 14 | 20 | — | — | 47 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 27 | 27 | 26 | 26 | 27 | 0 | 26 | 186 | 0 | 27 | 27 | 0 | 27 | 206 | 2 | 27 | 74 | 18 | 125 | 27 | 8 |
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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