
Surf Forecasts:
Diamond Beach surf forecast from 11 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 2PM (local time) - 1ft (0.3m), 14s period, SE swell with cross-offshore winds.
- Most powerful swell: Monday 17 Aug, 8AM (local time) - 4.5ft (1.4m), 6s period, S swell with 146 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 2PM (local time) - 1ft (0.3m), 14s period with SE 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 18) at 2PM. The primary swell is predicted to be 0.3m and 14s period with a secondary swell of 0.4m and 7s. Another secondary swell of 0.3m and 9s 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 1.4m 6s and forecast to arrive on Monday (Aug 17) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Saturday (Aug 15) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Tue 18th Aug) | 1ft (0.3m) 14s |
| Best Surf | 2PM (Tue 18th Aug) | 1ft (0.3m) 14s |
| Most Powerful | 8AM (Mon 17th Aug) | 4.5ft (1.4m) 6s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Alright, this is Rusty.
Honestly, mate, the outlook for Diamond Beach over the next 16 days is a tough one. We’re looking at a real flat spell, with a whole lot of nothing in the water for the first week and a half. The ocean is practically asleep. The water temp is sitting at a balmy 78°, which is a touch warmer than normal for this time of year, so at least it’ll be nice just to be in the water, even if you’re just floating.
We kick off on Tuesday the 11th with tiny, weak 1.0ft swell from the south, a short period of 6 seconds, and a cross-on breeze. The combined energy is a measly (10). It’s a write-off.
The next few days are more of the same. Wednesday the 12th brings the same tiny 1.0ft south swell, but the wind goes offshore and clean, so it’s clean but barely a ripple. The energy is even lower (9). Thursday the 13th drops to 0.3ft, and conditions are choppy. Friday the 14th is clean with offshore wind, but still only 1.0ft.
We drift through a long gap of tiny, weak surf. Saturday the 15th brings a little bump to 1ft from the ENE, but it’s short period. The energy picks up to (19) and (21), but it’s still barely surfable. Sunday the 16th is a mess, with a 2ft south swell but a fresh 22 mph cross-on making it lumpy.
It’s not until Monday the 17th of August that we see the best of a bad bunch. The swell finally bumps up to 3ft from the south, with a moderate 6-second period. The combined energy climbs to (83) – still weak, but it’s the first real pulse. The wind is a clean cross-offshore, which is a big plus. This is the closest we get to a standout, but it’s a very relative kind of standout. The afternoon cleans up with a fresh offshore from the WNW, dropping to 2ft and (47) energy.
After that, the swell fades again. Tuesday the 18th has a long-period 1.0ft SE swell at 15 seconds (59 energy), but it’s too small and too straight for a beach break like Diamond Beach. You’d need a point or a reef for that to work. The rest of the window is a mix of tiny swells, onshore winds, and choppy conditions.
The first real glimmer of something decent doesn’t show until Sunday the 23rd of August. The morning brings a 3ft south swell with a 6-second period, but the energy is only (72). The wind is offshore and clean. It’s described as “surfable waves but very ordinary conditions,” which is the most optimistic the whole forecast gets. That’s the one to keep an eye on, but don’t expect fireworks.
Overall, this is a long, flat run. The breaks are exposed to the south and southeast, but the swell just isn’t there. The combined energy stays well below 100 for nearly the entire 16 days, telling you the ocean is just weak. For a beginner, nothing gets over 5ft, so that’s the only saving grace, but there’s nothing to ride anyway. The setup looks more interesting for a kite than a paddle, honestly.
Keep your expectations low, and check back in a week. Forecasts can change.
Rusty.
Short Range ForecastHeavy rain (total 20mm), heaviest during Tue night. Warm (max 28°C on Tue afternoon, min 22°C on Tue night). Winds decreasing (fresh winds from the W on Tue night, calm by Fri morning). | Days 5-7 Weather SummaryHeavy rain (total 21mm), heaviest during Sun night. Warm (max 25°C on Fri afternoon, min 19°C on Sat morning). Winds increasing (calm on Fri afternoon, strong winds from the SSW by Sun night). | |||||||||||||||||||
Tue 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | ||||||||||||||
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) | S 6 | SSW 4 | S 5 | SSE 6 | SSW 3 | S 4 | S 3 | S 4 | SSE 5 | SSE 5 | SSE 6 | SSE 6 | SSE 7 | SSE 7 | SSE 7 | S 3 | S 6 | S 6 | SSE 7 | SSE 7 |
Wave Graph | ||||||||||||||||||||
5 | 4 | 4 | 6 | 9 | 3 | 3 | 3 | 4 | 4 | 7 | 8 | 9 | 9 | 4 | 7 | 138 | 83 | 47 | 18 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross-off | off | off | cross-off | cross-off | cross | cross | cross | cross-on | cross | cross-off | off | cross-off |
High Tide | 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 | 12:41PM1.53m | 00:53AM1.34m | |||||||
Low Tide | 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 | 5:55AM0.02m | 6:24PM0.16m | ||||||||
— | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | |
7:59 | — | — | 7:58 | — | — | 7:57 | — | — | 7:55 | — | — | 7:53 | — | — | 7:52 | — | — | 7:52 | — | |
mm | — | 8 | 7 | — | — | — | 2 | 1 | 2 | 5 | 1 | — | — | — | — | — | 12 | 3 | — | — |
Temp °C | 28 | 27 | 23 | 28 | 28 | 27 | 27 | 28 | 26 | 25 | 24 | 21 | 23 | 23 | 23 | 24 | 23 | 25 | 28 | 26 |
Feels °C | 29 | 28 | 25 | 28 | 28 | 30 | 28 | 30 | 29 | 27 | 22 | 19 | 24 | 22 | 23 | 21 | 19 | 27 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SSW 4 | S 5 | ENE 4 | SE 8 | S 4 | SE 8 | S 4 | SSE 5 | SSE 5 | SSE 6 | ENE 4 | ENE 5 | SSE 7 | SSE 7 | — | E 6 | S 6 | SSE 7 | SSE 7 |
3 | 4 | 4 | 1 | 3 | 2 | 3 | 1 | 4 | 2 | 7 | 8 | 9 | 9 | 4 | — | 1 | 83 | 47 | 18 | |
Swell 2 Height (m) Direction Period (s) | E 8 | SSE 5 | SE 8 | SE 8 | ENE 4 | SE 8 | E 11 | SE 8 | SE 9 | SE 6 | SE 9 | SSE 6 | SSE 7 | ENE 5 | ENE 5 | NE 5 | — | — | — | SE 9 |
1 | 3 | 3 | 3 | 1 | 3 | 2 | 3 | 3 | 1 | 3 | 8 | 9 | 3 | 2 | 1 | — | — | — | 3 | |
Swell 3 Height (m) Direction Period (s) | E 8 | SE 9 | E 8 | E 8 | — | E 11 | — | — | SE 6 | SE 10 | — | SE 9 | SE 9 | SE 9 | SE 9 | E 6 | — | — | — | SE 16 |
1 | 3 | 1 | 1 | — | 2 | — | — | 2 | 4 | — | 3 | 3 | 3 | 3 | 1 | — | — | — | 10 | |
Wind waves Height (m) Direction Period (s) | S 6 | — | NE 3 | SSE 6 | SSW 3 | WSW 3 | S 3 | — | — | — | NNE 3 | N 3 | — | — | — | S 3 | S 6 | — | — | NW 3 |
5 | — | 1 | 6 | 9 | 2 | 2 | — | — | — | 3 | 1 | — | — | — | 7 | 138 | — | — | 5 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 2331 | 502 | 502 | 2404 | 558 | 323 | 2404 | 323 | 1011 | 2405 | 513 | 509 | 528 | 323 | 289 | 1381 | 893 | 19 | 30 | 32 |
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.











