Surf Forecasts:
Diamond Street surf forecast from 16 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 5AM (local time) - 2.5ft (0.8m), 15s period, SW swell with glassy winds.
- Most powerful swell: Sunday 16 Aug, 5PM (local time) - 3ft (0.9m), 14s period, SW swell with 350 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 5AM (local time) - 2.5ft (0.8m), 15s 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 Wednesday (Aug 19) at 5AM. The primary swell is predicted to be 0.8m and 15s period with a secondary swell of 0.8m and 7s. 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 14s and forecast to arrive on Sunday (Aug 16) at 5PM. 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 (Wed 19th Aug) | 2.5ft (0.8m) 15s |
| Best Surf | 5AM (Wed 19th Aug) | 2.5ft (0.8m) 15s |
| Most Powerful | 5PM (Sun 16th Aug) | 3ft (0.9m) 14s |
Table - best surf conditions forecast for Diamond Street over the next 16 days.
The Lowdown
Alright, Rusty here again, translating this into feet and Fahrenheit for those who think that way.
Let’s keep it real – this stretch is a dud. From Sunday 16 August through Thursday 20 August, it’s a total flat spell with nothing worth talking about. The first chance of anything surfable comes around Friday 21 August, and even then it’s just marginal. The water is running much warmer than normal for August, sitting at about 73°F, but that’s the only bright spot.
Diamond Street is a beginner-friendly break that breaks fairly consistently, but the wind is the enemy here. Almost every day it’s cross-onshore – light to moderate – keeping things choppy. The swell comes from the SW, but the break works best with W swell, so it never really lines up. Swell heights hang between 1 ft and 3 ft, with some long-period pulses over 15 seconds. The best of a bad bunch is the afternoon of Saturday 29 August – a 3 ft SW swell, 16-second period, light NW wind, and moderate combined energy (534). Still, it’s cross-onshore, so expect bumpy faces. Sunday 30 August morning is similar, 3 ft SW, 15 seconds, but again not clean.
For surfers, it’s pretty grim. If you’ve got a kite, those steady breezes and small waves might be a laugh. For a paddle session, this is a 16-day desert.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Mon morning, min 19°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°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) | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 16 | SW 17 | SW 15 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 | SSW 13 | SW 13 | SW 14 | SW 15 | SSW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 444 | 350 | 350 | 297 | 245 | 231 | 211 | 135 | 258 | 291 | 291 | 217 | 211 | 211 | 153 | 140 | 116 | 84 | 52 | 217 | 191 |
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 | cross-on | cross-on | cross-on | cross-on | on | glassy | on | cross-on | cross-on | on | on | on | on | on | cross |
High Tide | 12:25PM1.62m | 00:32AM1.32m | 1:00PM1.58m | 1:30AM1.08m | 1:42PM1.53m | 3:05AM0.90m | 2:35PM1.47m | 3:52PM1.44m | 8:21AM1.03m | 5:13PM1.48m | 8:29AM1.11m | 6:17PM1.56m | |||||||||
Low Tide | 6:59PM0.38m | 6:46AM0.39m | 8:01PM0.43m | 7:11AM0.60m | 9:23PM0.46m | 7:28AM0.78m | 11:09PM0.42m | 00:38AM0.31m | 10:47AM1.01m | 1:32AM0.20m | 12:26PM0.96m | 2:09AM0.09m | |||||||||
 | |  | | | | | | | | | | | | | | |  |  | |  | |
 | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — |
 | — | 7:32 | — | — | 7:31 | — | — | 7:30 | — | — | 7:30 | — | — | 7:28 | — | — | 7:27 | — | — | 7:25 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 20 | 20 | 20 | 22 | 22 | 21 | 22 | 22 | 21 | 22 | 23 | 22 | 23 | 22 | 22 | 23 | 23 | 23 | 24 | 24 | 23 |
Feels °C | 20 | 19 | 20 | 22 | 21 | 21 | 22 | 21 | 22 | 23 | 24 | 24 | 24 | 22 | 24 | 24 | 23 | 25 | 25 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | W 6 | WNW 7 | W 7 | W 6 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 | SSW 13 | SW 13 | SW 12 | SW 15 | SSW 15 |
| kJ | 444 | 350 | 350 | 297 | 245 | 62 | 77 | 59 | 52 | 291 | 291 | 217 | 211 | 211 | 153 | 140 | 116 | 84 | 51 | 217 | 191 |
Swell 2 Height (m) Direction Period (s) | S 10 | S 10 | W 5 | W 6 | W 10 | SW 14 | SW 16 | SW 13 | SW 15 | W 7 | W 7 | W 6 | W 6 | W 6 | W 6 | WNW 6 | WNW 6 | WNW 6 | WNW 6 | WNW 6 | W 10 |
| kJ | 8 | 8 | 28 | 33 | 8 | 231 | 211 | 109 | 258 | 66 | 43 | 24 | 17 | 19 | 16 | 12 | 13 | 11 | 13 | 13 | 49 |
Swell 3 Height (m) Direction Period (s) | W 10 | W 11 | S 10 | W 10 | S 10 | S 9 | SW 13 | SW 17 | SW 19 | SW 20 | S 8 | W 14 | SW 19 | W 13 | WNW 12 | SW 18 | SW 17 | SSW 16 | SW 14 | WNW 10 | SW 19 |
| kJ | 8 | 9 | 7 | 8 | 8 | 2 | 83 | 135 | 15 | 16 | 1 | 15 | 57 | 13 | 27 | 50 | 73 | 50 | 52 | 22 | 94 |
Wind waves Height (m) Direction Period (s) | W 5 | W 5 | — | — | W 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 11 | 19 | — | — | 47 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 15 | 15 | 14 | 14 | 15 | 7 | 14 | 195 | 5 | 15 | 15 | 0 | 15 | 215 | 14 | 15 | 62 | 15 | 130 | 15 | 14 |
Best forecast wave conditions in San Diego County | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Diamond Street surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest