Surf Forecasts:
Diamond Beach surf forecast from 30 Jul 2026:
- Most powerful swell: Sunday 2 Aug, 5AM (local time) - 2ft (0.6m), 8s period, SSE swell with 57 kJ wave energy.
Best Forecast Surf Conditions for Diamond Beach this week:
The most powerful waves expected at Diamond Beach in the next 16 days are 0.6m 8s and forecast to arrive on Sunday (Aug 02) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Thursday (Jul 30) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Sun 2nd Aug) | 2ft (0.6m) 8s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Alright, Rusty here, checking the outlook for Diamond Beach. Honestly, it’s a grim couple of weeks to start. This spot is exposed to the southeast, and it’s inconsistent, so it takes a perfect setup to work. For the first week and a half, the swell is tiny, the wind is mostly onshore or side-shore, and the wave energy is weak, sitting between 11 and 49. You’re looking at knee-high slop at best. It’s a long dry spell until we hit the second week.
The first real chance comes on Saturday, the 8th of August, in the morning. There’s a 0.8m swell from the southeast with an 11-second period, giving a combined energy of 178 (moderate). The wind is cross-offshore from the west-southwest, so it’s clean. It’s rideable, but the conditions are still called “very ordinary,” so don’t get too excited.
The highlight is Sunday, the 9th of August, in the morning. That’s the one. The swell picks up to 1.1m from the southeast, with a 12-second period, pushing the combined energy to 330 (moderate). The wind is offshore from the northwest, and it’s light, so the surface will be glassy. That’s the best combo of size, period, and wind we’ve got. The longer period means the waves will have some push, but at a beach break like Diamond Beach, a 12-second swell can sometimes straighten out. Still, with that offshore wind, it should be the best session of the entire forecast. Expect the place to be crowded.
After that, the swell holds at 1.0m to 1.2m through the next week, but the wind swings onshore from the east-northeast to east, making it choppy and messy. The combined energy stays moderate (242 to 409), but it’s all blown out. For beginners, anything over 1.5m is too big, but that’s not the problem here – the onshore wind is the real buzzkill.
The water temperature is about what you’d expect for this time of year, nothing special.
So, here’s the call: hold out for the morning of Sunday, the 9th of August. That’s your only real window. The rest is mostly a washout.
Rusty
Short Range ForecastLight rain (total 2mm), mostly falling on Fri morning. Warm (max 25°C on Wed night, min 21°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 14mm), heaviest on Mon afternoon. Warm (max 25°C on Sun afternoon, min 22°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | ||||||||||||||
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 7 | SE 8 | SSE 8 | SSE 8 | SSE 8 | SE 8 | SSE 9 | SSE 7 | SSE 7 | SE 9 | SE 9 | SE 7 | SE 8 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 36 | 33 | 23 | 23 | 26 | 15 | 30 | 10 | 18 | 12 | 12 | 8 | 16 | 48 | 46 | 48 | 29 | 18 | 11 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | on | on | on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-off | cross-off | cross-on | on | cross-on |
High Tide | 9:12PM1.58m | 9:39AM1.31m | 9:47PM1.57m | 10:15AM1.34m | 10:22PM1.54m | 10:52AM1.37m | 10:58PM1.49m | 11:30AM1.40m | 11:39PM1.44m | 12:12PM1.43m | 00:25AM1.38m | 12:58PM1.47m | 1:17AM1.31m | ||||||
Low Tide | 3:22AM0.02m | 3:23PM0.14m | 3:58AM-0.00m | 4:03PM0.14m | 4:33AM-0.01m | 4:42PM0.15m | 5:05AM-0.00m | 5:20PM0.17m | 5:38AM0.02m | 6:03PM0.20m | 6:13AM0.05m | 6:53PM0.23m | |||||||
 |  | |  |  | |  | | | | |  |  | | | | | | | |
 | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — |
 | 8:14 | — | 8:13 | — | — | 8:12 | — | — | 8:10 | — | — | 8:09 | — | — | 8:08 | — | — | 8:07 | — |
mm | — | — | — | — | 1 | 1 | — | — | — | — | — | — | 4 | 5 | 5 | — | — | — | — |
Temp °C | 25 | 23 | 24 | 23 | 22 | 24 | 24 | 24 | 25 | 24 | 24 | 25 | 24 | 23 | 24 | 23 | 22 | 24 | 24 |
Feels °C | 23 | 20 | 25 | 24 | 24 | 24 | 24 | 25 | 24 | 23 | 24 | 24 | 25 | 23 | 26 | 25 | 21 | 23 | 25 |
Swell 1 Height (m) Direction Period (s) | SSE 7 | SE 8 | SSE 8 | SSE 8 | SSE 8 | SE 8 | SSE 9 | SSE 7 | SE 9 | SE 9 | SE 9 | SE 7 | SE 8 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SE 7 |
| kJ | 36 | 33 | 23 | 23 | 26 | 15 | 30 | 10 | 3 | 12 | 12 | 8 | 16 | 48 | 46 | 48 | 29 | 18 | 11 |
Swell 2 Height (m) Direction Period (s) | E 6 | ENE 8 | WNW 3 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | SSE 4 | E 6 | SE 6 | E 6 | SSE 7 | SE 9 | E 6 | — | — | — | NE 4 | — |
| kJ | 1 | 6 | 1 | 11 | 6 | 7 | 3 | 1 | 1 | 2 | 1 | 5 | 3 | 1 | — | — | — | 1 | — |
Swell 3 Height (m) Direction Period (s) | E 8 | E 8 | ENE 7 | — | — | — | — | E 6 | ENE 6 | E 6 | E 6 | SE 9 | E 5 | — | — | — | — | — | — |
| kJ | 1 | 1 | 5 | — | — | — | — | 1 | 3 | 1 | 1 | 3 | 1 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WNW 4 | WNW 4 | — | — | — | — | S 3 | — | SSE 7 | S 3 | S 3 | SSE 4 | S 3 | W 3 | WNW 2 | — | NNE 3 | — | SSW 3 |
| kJ | 11 | 11 | — | — | — | — | 3 | — | 18 | 6 | 8 | 4 | 6 | 1 | 1 | — | 1 | — | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 32 | 10 | 29 | 85 | 98 | 346 | 85 | 372 | 1135 | 553 | 383 | 372 | 252 | 29 | 2 | 2 | 98 | 942 | 347 |
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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