Surf Forecasts:
Diamond Street surf forecast from 8 Aug 2026:
- Best quality surf: Monday 10 Aug, 5AM (local time) - 2.5ft (0.7m), 14s period, SW swell with glassy winds.
- Most powerful swell: Saturday 8 Aug, 11PM (local time) - 3ft (0.9m), 16s period, SW swell with 371 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 5AM (local time) - 2.5ft (0.7m), 14s period with SW swell.
Best Forecast Surf Conditions for Diamond Street this week:
The surf forecast for Diamond Street over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 10) at 5AM. The primary swell is predicted to be 0.7m and 14s period with a secondary swell of 0.4m and 11s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Diamond Street in the next 16 days are 0.9m 16s and forecast to arrive on Saturday (Aug 08) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 10th Aug) | 2.5ft (0.7m) 14s |
| Best Surf | 5AM (Mon 10th Aug) | 2.5ft (0.7m) 14s |
| Most Powerful | 11PM (Sat 8th Aug) | 3ft (0.9m) 16s |
Table - best surf conditions forecast for Diamond Street over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it. We’ve got a pretty quiet stretch ahead for Diamond Street. The whole 16-day window is basically flat and messy, so I’ll walk you through the few flickers of hope.
Overall, the pattern is dominated by small, weak south-west swells that never really get their act together. The wind is mostly cross-onshore, which is a real shame because the swell is tiny. There’s a big gap of nothing good from the start all the way through to the middle of the month. The first real standout is a brief window on Tuesday afternoon, 11th August.
For that Tuesday afternoon, the wind drops to glassy, which is a huge positive. The swell is only 2ft from the SW, but it’s got a long period of 18 seconds, so there’ll be some real push and shape to the few waves that come through. The combined energy is moderate (374). It’s a beginner break, so that tiny size is perfect for learning, but the long period means it might break a little too straight for the beach setup. Still, with glassy conditions, it’s the best you’ll see.
The only other time the water gets a mention is on the Friday morning, 7th August. The water temperature is a very unusual 75°, which is 8° warmer than normal for this time of year. That’s a real anomaly, but unfortunately, the surf is poor.
After that Tuesday, it’s back to small cross-onshore dribble right through to the end of the forecast. The combined energy does bump up to strong levels on the 15th and 22nd (613 and 560), but with cross-onshore winds and poor surf conditions flagged, it’s just not going to line up for a paddle. The setup is a beach, and with moderate wind and small, weak swell, this might be more interesting for a kite surfer than someone on a surfboard.
So, to be straight with you: if you’re desperate for a paddle, the glassy Tuesday afternoon, 11th August, is your only real shot. The rest of the 16 days is a write-off. Don’t hold your breath – the forecasts can change, but right now, it’s looking bleak.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Sat morning, min 21°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Mon morning, min 21°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | |||||||||||||||
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 19 | SW 19 | SW 17 | SW 17 | SW 16 | SW 16 | SSW 15 | SW 15 | SW 14 | SW 13 | SW 20 | SW 13 | SW 14 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 248 | 173 | 309 | 230 | 261 | 367 | 275 | 217 | 211 | 183 | 134 | 142 | 164 | 197 | 249 | 179 | 254 | 251 | 245 | 242 | 224 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | cross-on | on | glassy | cross-on | glassy | glassy | cross-on | on | glassy | cross-on | on | glassy |
High Tide | 4:59PM1.77m | 7:51AM1.04m | 6:08PM1.90m | 8:31AM1.16m | 7:08PM2.03m | 9:05AM1.27m | 8:01PM2.13m | 9:38AM1.38m | 8:49PM2.17m | 10:11AM1.47m | 9:34PM2.13m | 10:44AM1.54m | 10:18PM2.01m | ||||||||
Low Tide | 10:07AM0.84m | 1:13AM-0.00m | 11:52AM0.85m | 2:06AM-0.19m | 1:08PM0.77m | 2:50AM-0.33m | 2:06PM0.65m | 3:31AM-0.40m | 2:57PM0.52m | 4:08AM-0.40m | 3:44PM0.42m | 4:44AM-0.33m | 4:30PM0.35m | ||||||||
 |  |  | | | | | | | | | | | |  | | | | | | | |
 | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 7:42 | — | — | 7:40 | — | — | 7:39 | — | — | 7:38 | — | — | 7:37 | — | — | 7:37 | — | — | 7:36 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 21 | 23 | 23 | 22 | 23 | 23 | 23 | 23 | 23 | 22 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 21 |
Feels °C | 23 | 22 | 21 | 23 | 22 | 22 | 23 | 23 | 24 | 23 | 23 | 23 | 23 | 22 | 23 | 24 | 21 | 23 | 22 | 21 | 22 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 17 | SW 17 | SW 16 | SW 16 | SSW 15 | SW 15 | SW 14 | SW 13 | SSW 13 | SW 13 | SW 14 | SW 18 | SW 18 | SW 13 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 |
| kJ | 136 | 103 | 309 | 230 | 261 | 367 | 275 | 217 | 211 | 183 | 118 | 142 | 164 | 197 | 249 | 138 | 254 | 251 | 245 | 242 | 224 |
Swell 2 Height (m) Direction Period (s) | SSW 19 | SW 19 | SW 12 | SW 12 | SW 12 | W 5 | WNW 5 | SW 11 | W 4 | SW 20 | SW 20 | SW 19 | SW 18 | WSW 14 | SSW 12 | SW 17 | WSW 13 | SSW 10 | S 11 | SSW 10 | SW 20 |
| kJ | 248 | 173 | 92 | 69 | 90 | 11 | 8 | 61 | 3 | 63 | 134 | 133 | 118 | 120 | 48 | 179 | 68 | 37 | 59 | 37 | 97 |
Swell 3 Height (m) Direction Period (s) | WNW 4 | S 9 | WNW 4 | S 9 | SW 23 | SW 12 | SW 11 | SW 21 | SW 11 | W 4 | SW 16 | WNW 8 | W 7 | SSW 12 | SW 13 | W 7 | SSW 10 | WNW 9 | SW 12 | SW 12 | S 11 |
| kJ | 4 | 6 | 5 | 6 | 20 | 69 | 31 | 72 | 19 | 1 | 40 | 11 | 4 | 57 | 45 | 4 | 33 | 16 | 39 | 38 | 37 |
Wind waves Height (m) Direction Period (s) | — | WNW 4 | — | WNW 4 | W 4 | — | — | WNW 5 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 4 | — | 3 | 7 | — | — | 9 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 15 | 14 | 14 | 14 | 15 | 14 | 15 | 14 | 7 | 62 | 291 | 0 | 62 | 0 | 0 | 154 | 15 | 0 | 62 | 15 | 0 |
Best forecast wave conditions in San Diego County | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Diamond Street Surf forecast
The above surf forecast table for Diamond Street provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Diamond Street can be found by selecting the local surf guide option on the grey menu. Our Diamond Street 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 (Diamond Street) 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 Diamond Street 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.
Diamond Street is 9 km (6 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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