Surf Forecasts:
Diamond Beach surf forecast from 26 Aug 2026:
- Best quality surf: Friday 28 Aug, 5AM (local time) - 2.5ft (0.8m), 9s period, SE swell with glassy winds.
- Most powerful swell: Friday 28 Aug, 5AM (local time) - 2.5ft (0.8m), 9s period, SE swell with 88 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 5AM (local time) - 2.5ft (0.8m), 9s 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 Friday (Aug 28) at 5AM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.1m and 11s. Another secondary swell of 0.6m and 6s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Diamond Beach in the next 16 days are 0.8m 9s and forecast to arrive on Friday (Aug 28) at 5AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Friday (Aug 28) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Fri 28th Aug) | 2.5ft (0.8m) 9s |
| Best Surf | 5AM (Fri 28th Aug) | 2.5ft (0.8m) 9s |
| Most Powerful | 5AM (Fri 28th Aug) | 2.5ft (0.8m) 9s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Alright folks, it’s a bit of a quiet stretch ahead for us here at Diamond Beach. We’re looking at a long run of small, weak swell with average to poor conditions, so don’t expect too much.
For the first few days, we’re dealing with tiny waves. On Tuesday the 25th, there’s a long-period 1ft SE groundswell (11 seconds) with a light cross-offshore wind, and the water is sitting at 76°, which is a touch warmer than usual for this time of year. But honestly, it’s just too small to get excited about. The combined energy is weak (24). Wednesday the 26th morning is even smaller, with a light cross-on breeze and only 1ft of weak, short-period swell. The wind stays onshore and chop picks up through the week.
We do see a slight bump in swell energy on Thursday the 28th and Friday the 29th of August, with the swell height getting up to 2ft and the combined energy climbing to moderate levels (101) on Thursday afternoon. But the wind is cross-onshore and the conditions are described as poor surf, so it’s not going to be any fun. By Friday morning the 28th, there’s a brief window of cleaner conditions with a light cross-offshore wind and 2ft of short-period swell (6 seconds), but the quality is still described as very ordinary. It’s not a goer.
The theme continues through the weekend and into the start of September. Swell stays tiny, mostly under 2ft, with weak energy (values in the teens and twenties). The wind occasionally turns offshore or cross-offshore, like on Monday morning the 31st of August or Tuesday the 1st of September, but the swell is simply too small to ride. The water temperature anomaly is not mentioned again, so it’s about average.
We do see a modest increase in swell around Thursday the 3rd of September, with the swell height climbing to 3ft to 3ft from the ESE and combined energy hitting moderate levels (213 and 200). But it’s accompanied by a moderate cross-onshore wind, making for choppy, poor surf. The following few days have similar issues: small swell, onshore or cross-shore wind, and poor surf quality. None of these windows are worth paddling out for.
There is a slight glimmer on the 9th of September: a 2ft E swell with a moderate offshore wind and clean conditions. The wave energy is still weak (74), but it’s the best we’ll see. Still, 2ft is tiny.
So, the honest truth is: there are no standout sessions in the entire 16-day window. This is a long stretch of flat to near-flat conditions with poor to average wind. For a spot like Diamond Beach, this kind of blank run is pretty normal.
Rusty
Short Range ForecastLight rain (total 9mm), mostly falling on Thu night. Warm (max 26°C on Thu morning, min 22°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Fri night. Warm (max 33°C on Mon afternoon, min 22°C on Sat morning). Wind will be generally light. | ||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | ||||||||||||||
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) | SE 11 | SE 9 | SE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 9 | ESE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | S 4 | SE 8 | SE 7 | S 4 |
Wave Graph | |||||||||||||||||||
18 | 14 | 19 | 31 | 28 | 70 | 31 | 27 | 18 | 21 | 17 | 16 | 10 | 18 | 18 | 14 | 9 | 8 | 14 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | glassy | off | cross | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross | cross-off |
High Tide | 7:54AM1.30m | 8:07PM1.56m | 8:32AM1.37m | 8:44PM1.59m | 9:08AM1.44m | 9:20PM1.58m | 9:43AM1.49m | 9:56PM1.56m | 10:18AM1.53m | 10:34PM1.51m | 10:57AM1.56m | 11:17PM1.44m | |||||||
Low Tide | 1:29AM0.11m | 1:33PM0.16m | 2:09AM0.04m | 2:17PM0.12m | 2:48AM-0.01m | 3:00PM0.08m | 3:25AM-0.03m | 3:42PM0.06m | 4:00AM-0.04m | 4:22PM0.06m | 4:34AM-0.03m | 5:04PM0.08m | |||||||
— | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — | 6:26 | — | — | |
7:39 | — | 7:38 | — | — | 7:37 | — | — | 7:36 | — | — | 7:35 | — | — | 7:32 | — | — | 7:31 | — | |
mm | — | — | — | 1 | 2 | 1 | 5 | — | — | 3 | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 23 | 24 | 25 | 26 | 26 | 26 | 24 | 25 | 25 | 23 | 23 | 23 | 24 | 24 | 24 | 27 | 33 | 33 |
Feels °C | 23 | 24 | 24 | 23 | 25 | 24 | 28 | 27 | 29 | 28 | 21 | 22 | 23 | 25 | 23 | 23 | 29 | 34 | 33 |
Swell 1 Height (m) Direction Period (s) | SE 11 | SE 9 | SE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 9 | SSE 6 | SSE 6 | SSE 7 | SSE 6 | SSE 5 | SSE 5 | SE 8 | SE 8 | SE 8 | SSE 4 | SE 7 | S 4 |
18 | 14 | 19 | 31 | 28 | 70 | 31 | 19 | 12 | 21 | 14 | 5 | 9 | 18 | 18 | 10 | 5 | 8 | 14 | |
Swell 2 Height (m) Direction Period (s) | E 6 | SSE 6 | E 5 | E 13 | E 12 | E 12 | SE 6 | ESE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | S 5 | E 9 | E 9 | SE 8 | — | SE 7 |
1 | 3 | 1 | 4 | 3 | 3 | 2 | 27 | 18 | 17 | 17 | 16 | 10 | 2 | 2 | 2 | 9 | — | 7 | |
Swell 3 Height (m) Direction Period (s) | S 5 | E 6 | E 14 | E 6 | E 6 | — | — | — | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | — | — | — | — | SE 16 |
1 | 1 | 4 | 1 | 1 | — | — | — | 2 | 2 | 2 | 2 | 2 | 2 | — | — | — | — | 10 | |
Wind waves Height (m) Direction Period (s) | — | — | S 6 | S 4 | S 4 | SSE 4 | SSE 4 | — | — | — | — | — | — | — | S 2 | S 4 | — | SSE 3 | — |
— | — | 6 | 19 | 22 | 43 | 11 | — | — | — | — | — | — | — | 2 | 14 | — | 3 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 323 | 289 | 1174 | 158 | 325 | 1166 | 28 | 2 | 28 | 2 | 162 | 182 | 158 | 422 | 376 | 376 | 1145 | 289 | 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.











