Surf Forecasts:
Diamond Beach surf forecast from 11 Aug 2026:
- Best quality surf: Monday 17 Aug, 5PM (local time) - 4.5ft (1.3m), 6s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 17 Aug, 5PM (local time) - 4.5ft (1.3m), 6s period, S swell with 120 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 5PM (local time) - 4.5ft (1.3m), 6s 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 Monday (Aug 17) at 5PM. The primary swell is predicted to be 1.3m and 6s period with a secondary swell of 0.1m and 19s. 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 1.3m 6s and forecast to arrive on Monday (Aug 17) at 5PM. 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 Tuesday (Aug 11) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Mon 17th Aug) | 4.5ft (1.3m) 6s |
| Best Surf | 5PM (Mon 17th Aug) | 4.5ft (1.3m) 6s |
| Most Powerful | 5PM (Mon 17th Aug) | 4.5ft (1.3m) 6s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
G’day, Rusty here. Look, I’m gonna level with you – this forecast window is a tough one for Diamond Beach. We’ve got a long stretch of nothing worth paddling out for, then a couple of days that almost get interesting but don’t quite deliver. Let’s walk through it.
The water temp is sitting at 77°, which is a touch warmer than normal for this time of year. That’s nice, but it won’t make up for the lack of waves.
We start with a real gap. From Monday the 10th of August right through to Sunday the 16th, it’s poor surf conditions day after day. Tiny swell, mostly around 1ft to 1ft from the SSE, short period, and often choppy or cross-shore winds. No score worth talking about. Tuesday the 11th morning has clean conditions with a light westerly, but the swell is still a measly 1ft at 6 seconds. You could bob around on a foamie, but don’t expect a ride. Friday the 14th morning and afternoon see a clean offshore from the NW, but again, only 1ft. Frustrating.
Monday the 17th brings our first real chance. Afternoon sees a bump in swell to 4ft from the south, with a period of 6 seconds and combined energy of 127 (moderate). The wind goes light cross-off from the WNW, leaving it clean. It’s surfable but very ordinary – a score of 1 out of 10 tells the story. The south swell direction isn’t ideal for this exposed SE-facing beach anyway. Not a standout, just the best of a bad bunch.
Tuesday the 18th morning is interesting but tricky. A long-period groundswell from the SE at 15 seconds pushes in at only 1ft, with combined energy of 109 (moderate). That period is very long, which means it’ll be straight and fast at this beach break – better suited to a point or reef. The offshore NNW wind keeps it clean, but it’s tiny. For a beginner, it’s too weak and the period will make it unpredictable.
The rest of the window slides back into poor surf with onshore winds and choppy conditions. Thursday the 20th afternoon gets a fresh 19 mph southerly cross-on, making it lumpy. Nothing to recommend.
If I had to pick the best of it, it’s Monday 17th afternoon for a desperate paddle – 4ft from the south, clean, and the only time we see a moderate energy wave. But honestly, this setup looks more interesting for a kite surfer than a paddle surfer on that Monday. For a true surf, we’re dry.
Rusty
Short Range ForecastModerate rain (total 15mm), heaviest on Mon night. Warm (max 30°C on Mon afternoon, min 23°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Thu afternoon. Warm (max 29°C on Thu night, min 18°C on Sat morning). Wind will be generally light. | |||||||||||||||||||
Mon 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | ||||||||||||||
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 5 | SSE 6 | SSE 6 | S 5 | S 6 | S 6 | S 3 | S 4 | SSE 5 | SSE 4 | SSE 6 | SSE 6 | SSE 6 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | S 3 | S 5 |
Wave Graph  | ||||||||||||||||||||
 kJ | 12 | 20 | 10 | 10 | 9 | 3 | 5 | 5 | 9 | 7 | 4 | 7 | 8 | 7 | 10 | 10 | 9 | 4 | 6 | 62 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | cross | cross-off | cross-off | on | cross-on | cross-on | glassy | off | off | off | cross-off | cross-off | cross | cross-off | cross-off | cross-on | cross-on |
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 | 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 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — |
 | 8:00 | — | — | 7:59 | — | — | 7:58 | — | — | 7:57 | — | — | 7:55 | — | — | 7:53 | — | — | 7:52 | — |
mm | — | 12 | — | — | — | 1 | 1 | — | 1 | 2 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 30 | 26 | 25 | 29 | 29 | 25 | 27 | 26 | 27 | 28 | 29 | 25 | 28 | 28 | 21 | 24 | 23 | 22 | 24 | 23 |
Feels °C | 32 | 27 | 28 | 30 | 30 | 27 | 30 | 27 | 28 | 31 | 30 | 23 | 26 | 28 | 18 | 24 | 21 | 22 | 23 | 19 |
Swell 1 Height (m) Direction Period (s) | SE 10 | S 5 | SSE 6 | SSE 6 | S 5 | NE 3 | S 6 | SE 8 | S 4 | SSE 5 | SSE 4 | SSE 6 | SSE 6 | SSE 6 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | — | — |
| kJ | 4 | 20 | 10 | 10 | 9 | 2 | 5 | 3 | 9 | 7 | 4 | 7 | 8 | 7 | 10 | 10 | 9 | 4 | — | — |
Swell 2 Height (m) Direction Period (s) | E 8 | SE 10 | WNW 3 | SE 9 | SE 9 | S 6 | ENE 4 | — | SE 8 | SE 8 | SE 8 | SE 9 | SE 10 | SE 9 | NE 4 | NE 4 | ENE 5 | SE 9 | NE 4 | — |
| kJ | 1 | 4 | 1 | 3 | 3 | 2 | 1 | — | 3 | 3 | 3 | 3 | 4 | 3 | 2 | 1 | 2 | 3 | 1 | — |
Swell 3 Height (m) Direction Period (s) | E 8 | E 8 | SE 9 | E 8 | — | SE 8 | SE 8 | — | SE 11 | E 10 | E 10 | E 13 | — | — | SE 9 | SE 9 | SE 9 | — | — | — |
| kJ | 1 | 1 | 3 | 1 | — | 3 | 3 | — | 4 | 2 | 2 | 3 | — | — | 3 | 3 | 3 | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 6 | — | — | — | W 3 | NNE 3 | — | S 3 | WSW 3 | — | WNW 2 | NW 3 | NW 3 | NNE 3 | NNW 3 | — | — | — | S 3 | S 5 |
| kJ | 12 | — | — | — | 3 | 4 | — | 5 | 2 | — | 1 | 2 | 2 | 2 | 1 | — | — | — | 6 | 62 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 56 | 74 | 323 | 2664 | 376 | 502 | 3104 | 335 | 813 | 2404 | 273 | 422 | 3151 | 502 | 558 | 1001 | 273 | 502 | 734 | 592 |
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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