Surf Forecasts:
Diamond Beach surf forecast from 20 Aug 2026:
- Most powerful swell: Saturday 22 Aug, 8PM (local time) - 3ft (0.9m), 5s period, ENE swell with 33 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 0.9m 5s and forecast to arrive on Saturday (Aug 22) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Friday (Aug 21) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Sat 22nd Aug) | 3ft (0.9m) 5s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
G'day, Rusty here, and I gotta be straight with ya – the surf outlook for the next couple of weeks is a proper struggle. We're looking at a long, dry spell with barely a ripple to get excited about, so don't be in a rush to wax up just yet.
For the next fortnight, the only game in town is Diamond Beach (Diamond-Beach-1). The water temp is sitting at 76°, which is pretty much spot on for this time of year, so that's one small blessing.
The whole first week, from Thursday the 20th of August right through to the end of the month, is a write-off. We're seeing tiny swell, mostly under 2 ft, with weak wave energy in the teens and twenties. The winds are a messy mix of cross and cross-onshore, making for lumpy, poor conditions. There's a brief moment of glass on Saturday afternoon the 22nd, but it's only 2 ft of weak, short-period (4 seconds) junk. Not worth paddling out for.
We get a bit of a tease on Sunday the 23rd and Monday the 24th, with a clean, light offshore wind, but the swell is still pathetic – 0.7 ft to 2 ft. Even with a long-period (12 seconds) groundswell sneaking in on Monday, there's just no energy (combined energy of all swells directed here: 27) to push it. It's a classic case of "clean but empty."
The real action, if you can call it that, doesn't fire up until the very end of the run. On Thursday the 3rd of September, the swell starts to build. That afternoon we see 5 ft from the east with a period of 6 seconds, and the combined energy climbs to 150. It's still a bit messy with cross-onshore winds, but it's the first sign of life.
The standout, and really the only window to consider, is Friday the 4th of September. The morning kicks off with a 7 ft east swell (8-second period) and a solid combined energy of 533. The wind is a light cross-shore from the northeast, keeping it relatively clean. It's a decent size, but at 7 ft, it's pushing into the "experts only" territory, especially for a beach break. The afternoon holds similar size at 6 ft, but the wind swings cross-onshore, so the morning is the pick. The only downside is that Diamond Beach is an inconsistent spot, so don't expect a carnival. It's a bit of a long-range hope, so keep your fingers crossed the forecasts hold.
Honestly, with the persistent small swell and messy wind, this setup looks more interesting for kite surfing than paddle surfing for most of the period. But for the hardcore crew, that Friday the 4th of September morning might just offer a few fun ones.
Rusty.
Short Range ForecastHeavy rain (total 57mm), heaviest during Thu night. Warm (max 27°C on Thu afternoon, min 20°C on Thu night). Winds decreasing (fresh winds from the S on Thu afternoon, light winds from the E by Fri night). | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Sun afternoon. Warm (max 25°C on Sun afternoon, min 20°C on Mon morning). Wind will be generally light. | |||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||
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) | SE 8 | SSE 5 | NE 5 | ENE 5 | ENE 5 | E 3 | ENE 5 | ENE 5 | SSE 6 | SSE 6 | SSE 6 | ESE 12 | ESE 12 | ESE 11 | SE 11 | SE 11 | ESE 11 | ESE 11 | SSE 7 | ESE 9 |
Wave Graph | ||||||||||||||||||||
18 | 19 | 31 | 28 | 9 | 11 | 17 | 17 | 18 | 13 | 14 | 14 | 13 | 12 | 18 | 18 | 11 | 11 | 26 | 8 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | cross-on | cross-on | cross-on | cross-on | cross-off | off | cross-off | off | off | cross-off | cross | cross | cross | cross-off | cross-off | cross-on | cross-on |
High Tide | 3:04PM1.37m | 3:25AM1.09m | 3:56PM1.35m | 4:23AM1.07m | 4:53PM1.35m | 5:24AM1.09m | 5:49PM1.39m | 6:21AM1.14m | 6:42PM1.45m | 7:11AM1.22m | 7:27PM1.51m | 7:54AM1.30m | 8:07PM1.56m | |||||||
Low Tide | 9:17PM0.36m | 9:14AM0.37m | 10:19PM0.35m | 10:15AM0.37m | 11:13PM0.31m | 11:10AM0.33m | 00:01AM0.25m | 12:00PM0.28m | 00:46AM0.18m | 12:47PM0.22m | 1:29AM0.11m | 1:33PM0.16m | 2:09AM0.04m | |||||||
— | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | |
7:47 | — | — | 7:45 | — | — | 7:45 | — | — | 7:43 | — | — | 7:42 | — | — | 7:39 | — | — | 7:38 | — | |
mm | 1 | 27 | — | — | 2 | 10 | 12 | 5 | — | 4 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 21 | 22 | 23 | 22 | 23 | 24 | 23 | 25 | 24 | 21 | 25 | 24 | 23 | 24 | 23 | 22 | 23 | 24 |
Feels °C | 26 | 27 | 21 | 22 | 24 | 22 | 24 | 26 | 25 | 24 | 24 | 17 | 22 | 24 | 22 | 23 | 23 | 21 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SSE 5 | SSE 5 | SSE 5 | ESE 9 | — | SE 4 | ENE 5 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | ESE 11 | SE 11 | SE 11 | SSE 5 | SSE 5 | SSE 7 | SSE 6 |
18 | 19 | 5 | 2 | 7 | — | 2 | 17 | 18 | 13 | 10 | 7 | 7 | 12 | 18 | 18 | 2 | 11 | 26 | 7 | |
Swell 2 Height (m) Direction Period (s) | — | ESE 8 | ESE 9 | ESE 9 | SSE 4 | — | ESE 8 | SSE 4 | ENE 5 | ENE 4 | ESE 12 | ESE 12 | ESE 12 | SSE 6 | SSE 5 | S 4 | ESE 11 | ESE 11 | — | ESE 9 |
— | 7 | 7 | 8 | 2 | — | 6 | 3 | 2 | 2 | 14 | 14 | 13 | 3 | 3 | 1 | 11 | 11 | — | 8 | |
Swell 3 Height (m) Direction Period (s) | — | E 6 | E 15 | E 15 | SE 14 | — | SE 13 | ESE 8 | SE 12 | SE 12 | E 7 | E 7 | E 7 | E 7 | E 6 | SSE 5 | S 4 | — | SE 9 | ESE 6 |
— | 1 | 4 | 4 | 8 | — | 7 | 6 | 6 | 6 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | — | 3 | 3 | |
Wind waves Height (m) Direction Period (s) | SSE 3 | NNE 2 | NE 5 | ENE 5 | ENE 5 | E 3 | ENE 5 | — | — | — | WNW 3 | WNW 3 | WNW 3 | — | — | — | — | — | — | — |
9 | 1 | 31 | 28 | 9 | 11 | 17 | — | — | — | 3 | 4 | 2 | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 548 | 548 | 1001 | 2613 | 502 | 325 | 30 | 91 | 86 | 98 | 102 | 85 | 85 | 98 | 289 | 548 | 98 | 323 | 347 | 102 |
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.











