Surf Forecasts:
Diamond Beach surf forecast from 15 Sep 2026:
- Best quality surf: Sunday 20 Sep, 11PM (local time) - 3ft (0.9m), 5s period, S swell with offshore winds.
- Most powerful swell: Tuesday 22 Sep, 2AM (local time) - 5ft (1.6m), 7s period, E swell with 269 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 11PM (local time) - 3ft (0.9m), 5s 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 Sunday (Sep 20) at 11PM. The primary swell is predicted to be 0.9m and 5s period with a secondary swell of 0.3m and 6s. Another secondary swell of 0.8m and 5s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Diamond Beach in the next 16 days are 1.6m 7s and forecast to arrive on Tuesday (Sep 22) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Monday (Sep 21) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sun 20th Sep) | 3ft (0.9m) 5s |
| Best Surf | 11PM (Sun 20th Sep) | 3ft (0.9m) 5s |
| Most Powerful | 2AM (Tue 22nd Sep) | 5ft (1.6m) 7s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s take a close look at what’s on offer for Diamond Beach over the next couple of weeks. I gotta be straight with you – the first nine days are a write-off. There’s nothing worth paddling out for.
The trouble starts right away. We’ve got a tiny, short-period swell with weak energy (39) coming in from the ENE on Tuesday the 15th, and it’s not even clean. That cross-onshore wind is making a mess of things. This poor pattern sticks around, with tiny waves and dirty wind for the next week. The swell stays small, under 2.3ft, and the period is mostly poor – short and weak. The only day with an offshore breeze is Friday the 18th morning, but the swell is just 1ft and the energy is a measly (18). You’d be bobbing around waiting for nothing. Even when the swell picks up a bit around the 24th and 25th, the wind is still not great, and the quality is only marginal.
Now, if you’re patient, there is a light at the end of the tunnel. The standout day is Thursday the 24th and Friday the 25th. On Thursday afternoon, you’ll see the swell build to 6.6ft from the ESE with a clean cross-offshore breeze. The energy jumps to (567) and the period stretches to 8 seconds. It’s still big enough to be a bit much for beginners, but for the rest of us, the shape will be much better. Then, Friday morning (the 25th) is where it gets interesting. The swell pushes to 7.9ft from the E, with a solid 10-second period and a low energy reading of (1673). It’s still a cross-off breeze, and the waves will be clean. However, that size is firmly in the expert zone – over 8.2ft, so only the big dogs should be out there. The timing on this one is a bit of a gamble this far out, but it’s the only window with any real punch.
For the rest of the run into the end of the month, it’s back to small, messy, and blown-out. A few mornings late in the month (27th-29th) have clean wind, but the swell drops away to barely a ripple with energy under (100).
So there you have it. A long, flat start, one solid push for the experienced crew around the 24th-25th, then back to nothing. Keep an eye on the wind forecasts for that Friday – it could clean up into something special, but as of now, it’s a one-day show.
Short Range ForecastMostly dry. Warm (max 23°C on Mon night, min 19°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 30°C on Sun afternoon, min 22°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | ||||||||||||||
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) | NE 4 | ENE 5 | E 6 | E 6 | ESE 8 | E 6 | ESE 8 | E 8 | ESE 8 | SSW 4 | ESE 7 | ESE 6 | ESE 12 | SE 12 | SE 12 | ESE 6 | ESE 6 | S 5 | SE 11 |
Wave Graph  | |||||||||||||||||||
 kJ | 20 | 23 | 38 | 16 | 11 | 10 | 12 | 31 | 20 | 15 | 9 | 8 | 14 | 21 | 34 | 32 | 32 | 44 | 20 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | on | on | cross-on | cross | cross-on | cross-on | cross | off | cross-on | cross-on | cross-on | on | cross-on | cross | cross | cross-off |
High Tide | 11:30PM1.39m | 11:59AM1.53m | 00:18AM1.28m | 12:45PM1.46m | 1:07AM1.19m | 1:33PM1.39m | 1:59AM1.12m | 2:23PM1.34m | 2:53AM1.08m | 3:16PM1.31m | 3:49AM1.07m | 4:13PM1.31m | 4:49AM1.10m | ||||||
Low Tide | 5:16AM0.09m | 5:51PM0.16m | 5:52AM0.20m | 6:36PM0.25m | 6:31AM0.30m | 7:28PM0.34m | 7:19AM0.38m | 8:33PM0.38m | 8:27AM0.43m | 9:39PM0.38m | 9:39AM0.43m | 10:36PM0.33m | |||||||
 |  | | | | | | | | |  | | | |  |  | | |  | |
 | — | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — |
 | 7:09 | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:02 | — | — | 7:00 | — | — | 7:00 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 |
Temp °C | 23 | 20 | 20 | 19 | 19 | 20 | 21 | 21 | 23 | 23 | 23 | 24 | 23 | 22 | 23 | 23 | 26 | 30 | 25 |
Feels °C | 19 | 17 | 18 | 17 | 20 | 20 | 20 | 20 | 20 | 20 | 24 | 25 | 23 | 20 | 21 | 22 | 27 | 31 | 25 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 9 | E 6 | E 6 | E 5 | E 6 | ESE 6 | E 8 | ESE 8 | E 7 | SSW 4 | ESE 6 | ESE 12 | SE 12 | SE 12 | ESE 6 | ESE 6 | ESE 7 | S 5 |
| kJ | 12 | 12 | 38 | 16 | 9 | 10 | 6 | 31 | 20 | 9 | 3 | 8 | 14 | 21 | 34 | 31 | 32 | 26 | 20 |
Swell 2 Height (m) Direction Period (s) | S 6 | E 15 | — | SE 9 | ESE 8 | SE 8 | ESE 8 | SE 13 | SE 12 | SE 12 | ESE 7 | SSW 4 | SE 9 | — | E 8 | ESE 11 | SE 11 | ESE 11 | ESE 6 |
| kJ | 1 | 4 | — | 3 | 11 | 3 | 12 | 7 | 6 | 6 | 9 | 1 | 3 | — | 1 | 12 | 5 | 11 | 8 |
Swell 3 Height (m) Direction Period (s) | E 15 | — | — | E 14 | SE 14 | SE 13 | SE 13 | — | — | SE 9 | SE 12 | SE 12 | — | NE 6 | — | — | — | — | SE 11 |
| kJ | 4 | — | — | 4 | 7 | 7 | 7 | — | — | 3 | 6 | 6 | — | 1 | — | — | — | — | 18 |
Wind waves Height (m) Direction Period (s) | NE 4 | ENE 5 | — | — | — | — | SSW 3 | — | S 3 | SSW 4 | WNW 3 | — | E 6 | E 4 | ESE 5 | SSE 4 | SSW 4 | S 5 | NNE 3 |
| kJ | 20 | 23 | — | — | — | — | 1 | — | 5 | 15 | 1 | — | 13 | 6 | 23 | 32 | 26 | 44 | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 32 | 1142 | 734 | 635 | 502 | 50 | 119 | 50 | 502 | 252 | 323 | 1011 | 348 | 1173 | 1173 | 1174 | 50 | 7 | 2 |
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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