Surf Forecasts:
Diamond Beach surf forecast from 10 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 2AM (local time) - 3ft (0.9m), 5s period, S swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 11PM (local time) - 5ft (1.6m), 6s period, S swell with 175 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 2AM (local time) - 3ft (0.9m), 5s period with S swell.
Best Forecast Surf Conditions for Diamond Beach this week:
The surf forecast for Diamond Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 11) at 2AM. The primary swell is predicted to be 0.9m and 5s period with a secondary swell of 0.7m and 4s. Another secondary swell of 0.1m and 10s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Diamond Beach in the next 16 days are 1.6m 6s and forecast to arrive on Sunday (Aug 16) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Monday (Aug 17) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 11th Aug) | 3ft (0.9m) 5s |
| Best Surf | 2AM (Tue 11th Aug) | 3ft (0.9m) 5s |
| Most Powerful | 11PM (Sun 16th Aug) | 5ft (1.6m) 6s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here with a look at Diamond Beach for the next couple weeks.
Honestly, it’s a bleak picture for most of this run. We’re talking about a long, flat spell. For the first week and a half, from August 10th through the 20th, the swell is tiny – between 0.3ft and 2ft – mostly from the SSE or S, with short windswell periods of 4 to 6 seconds. The combined energy is barely a whisper, mostly between 5 and 42. The wind is often cross or cross-off, but with waves that small, you’re just floating, not surfing. There’s a glassy morning on the 15th, but the swell is still only 1ft – good for a paddle, not a ride.
We get a pulse around the 19th when the swell shifts to the SE and the period stretches out to 12 seconds—that’s a real groundswell. Energy climbs to 96 on the morning of the 19th, but the wind goes straight onshore and fresh, turning it into a lumpy mess. It’s not until the afternoon of August 20th that we see anything surfable, and even then, it’s ordinary. The swell is still only 1ft from the SE, but the period is 10 seconds, and the wind goes offshore from the WNW at 12 mph. The combined energy hits 92. It’s clean, it’s weak, but it’s something.
The one and only standout is that morning of August 20th. Thursday morning at Diamond Beach, with a clean offshore breeze from the WNW. The swell is small at 1ft from the SE, but that offshore wind will clean it up and put a little face on it. It’s not a classic, but if you’re jonesing with a longboard, that’s your best shot. Don’t plan a trip around it.
After that, it fades back to small, messy junk with onshore winds and a little more east swell around the 22nd, but the wind ruins it. The rest of the month is more of the same: weak swell, poor wind, and no real punch. This is a normal quiet spell for Diamond Beach—it’s inconsistent here, and this forecast shows exactly why.
Bottom line: if you’re going to paddle out, make it the morning of August 20th. Otherwise, wait for a better run.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Tue night. Warm (max 31°C on Mon night, min 22°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Fri afternoon. Warm (max 28°C on Thu night, min 20°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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) | SSE 6 | S 6 | S 5 | SSE 5 | SSE 5 | S 4 | SSE 6 | S 5 | S 3 | S 5 | SSE 5 | SSE 5 | SSE 7 | SSE 6 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | S 3 | S 5 | S 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 4 | 19 | 37 | 9 | 6 | 8 | 11 | 5 | 11 | 17 | 7 | 5 | 15 | 14 | 19 | 20 | 17 | 9 | 4 | 83 | 146 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-off | cross-off | cross-off | off | cross | cross | cross-on | glassy | cross | cross-off | cross-off | cross-off | cross | on | cross-on | cross-on | cross-on | cross-off |
High Tide | 7:08PM1.71m | 7:45AM1.44m | 8:03PM1.76m | 8:38AM1.52m | 8:53PM1.78m | 9:27AM1.58m | 9:41PM1.75m | 10:16AM1.61m | 10:29PM1.68m | 11:04AM1.60m | 11:16PM1.58m | 11:53AM1.57m | 00:04AM1.46m | ||||||||
Low Tide | 12:28PM0.03m | 1:26AM-0.07m | 1:26PM-0.03m | 2:18AM-0.14m | 2:22PM-0.08m | 3:07AM-0.18m | 3:14PM-0.09m | 3:53AM-0.19m | 4:04PM-0.07m | 4:35AM-0.16m | 4:51PM-0.02m | 5:15AM-0.09m | 5:37PM0.06m | ||||||||
 | |  |  |  | |  | |  | | | |  | |  | | | | | | | |
 | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — |
 | — | 8:00 | — | — | 7:59 | — | — | 7:58 | — | — | 7:57 | — | — | 7:55 | — | — | 7:53 | — | — | 7:52 | — |
mm | — | — | 1 | 1 | — | 6 | 1 | 1 | — | — | — | — | — | 1 | — | — | — | — | — | — | 21 |
Temp °C | 27 | 30 | 31 | 24 | 28 | 28 | 23 | 25 | 25 | 26 | 27 | 28 | 26 | 26 | 26 | 22 | 23 | 23 | 24 | 25 | 24 |
Feels °C | 28 | 31 | 31 | 24 | 28 | 28 | 24 | 26 | 26 | 28 | 28 | 31 | 28 | 27 | 27 | 21 | 24 | 23 | 24 | 23 | 21 |
Swell 1 Height (m) Direction Period (s) | SSE 6 | SE 10 | S 4 | SSE 5 | SSE 5 | S 4 | ENE 4 | ENE 4 | SE 8 | S 5 | SSE 5 | SSE 5 | SSE 7 | SSE 6 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | NE 5 | — | S 12 |
| kJ | 4 | 4 | 18 | 9 | 6 | 8 | 11 | 3 | 3 | 17 | 7 | 5 | 15 | 14 | 19 | 20 | 17 | 9 | 1 | — | 3 |
Swell 2 Height (m) Direction Period (s) | SE 7 | E 8 | SE 10 | SE 9 | SE 9 | SE 9 | SSE 6 | S 5 | NE 4 | SE 8 | SE 8 | SE 8 | E 10 | ENE 4 | — | E 12 | ENE 5 | ENE 5 | SE 9 | NE 5 | — |
| kJ | 2 | 1 | 4 | 3 | 3 | 3 | 10 | 5 | 1 | 3 | 3 | 3 | 2 | 1 | — | 3 | 5 | 2 | 3 | 1 | — |
Swell 3 Height (m) Direction Period (s) | E 10 | E 9 | E 8 | E 8 | — | — | SE 8 | SE 8 | — | SE 10 | E 10 | E 10 | E 13 | SE 10 | — | — | SE 9 | SE 9 | — | — | — |
| kJ | 2 | 1 | 1 | 1 | — | — | 3 | 3 | — | 4 | 2 | 2 | 3 | 4 | — | — | 3 | 3 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | S 6 | S 5 | WNW 3 | W 3 | W 3 | NE 4 | — | S 3 | WSW 3 | W 3 | — | NNE 3 | — | NNE 3 | NNE 3 | — | — | S 3 | S 5 | S 6 |
| kJ | — | 19 | 37 | 2 | 5 | 2 | 14 | — | 11 | 3 | 1 | — | 3 | — | 8 | 4 | — | — | 4 | 83 | 146 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1132 | 28 | 0 | 323 | 2664 | 1135 | 1509 | 1009 | 1009 | 136 | 546 | 289 | 289 | 289 | 422 | 210 | 1001 | 1009 | 946 | 1165 | 23 |
Best forecast wave conditions in New Jersey | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Diamond Beach Surf forecast
The above surf forecast table for Diamond Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Diamond Beach can be found by selecting the local surf guide option on the grey menu. Our Diamond 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 (Diamond 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 Diamond 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.
Diamond Beach is 43 km (27 miles) from Ocean City. If you plan a vacation in New Jersey, look for hotels and other accommodation in Ocean City. Ocean City has rooms for a wide range of budgets as well as car hire and transport links.
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