
Surf Forecasts:
Diamond Beach surf forecast from 12 Sep 2026:
- Most powerful swell: Tuesday 15 Sep, 8PM (local time) - 3.5ft (1.0m), 8s period, E swell with 110 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 1.0m 8s and forecast to arrive on Tuesday (Sep 15) 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 0.5m 3s period and expected on Sunday (Sep 13) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Tue 15th Sep) | 3.5ft (1.0m) 8s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Alright, Rusty here. Let's get into it, folks. This is a grim outlook for Diamond Beach. We're lookin' at a long stretch of flat or junk surf to start, with only a faint glimmer of something bigger way down the line.
For the next week and a half, there's basically nothing. The waves are tiny – we're talking 1 ft to 3 ft at best, with disappointing period from 4 to 8 seconds. The wind is mostly cross-onshore or onshore, making it choppy and messy. The only bright spot is that some of those mornings have clean conditions, but with ankle-to-knee-high swell, it's not worth paddling out. The combined swell energy is barely registering, often in the low double-digits like 13 to 31, or even triple-digits only a couple of times, but the quality is just terrible. The water temp on the first day is 77°F which is much warmer than normal for this time of year – a proper anomaly of 6°F – but it's not helping the surf.
From Saturday the 21st, things start to look a bit more interesting for the numbers, but not for us. We see swell building to 6 ft on Monday afternoon, then 6 ft on Tuesday, with the combined energy jumping up to 245, then 476, then 512. But here's the kicker – the wind is howling onshore at 15-19 mph from the SE, right into our face. The wave comment says "poor surf conditions," and I'm telling you, it's going to be a washing machine out there. That much size (6-6 ft) is getting into the "too big for beginners" territory anyway, and with that wind, even the experienced guys will be struggling.
Then, around Wednesday the 23rd, we finally get a shift. The wind turns cross-offshore from the west, and we're looking at a clean 7 ft swell on Wednesday morning, building to 7 ft by the afternoon. The period stretches to 9 seconds, and the energy hits 580 and then 809. This is the first real chance of the run. But it's big – over 7 ft – so solidly in the intermediate-to-expert range. Thursday the 24th holds similar size at 7 ft, with a better 10-second period, and the energy is pumping up to 1046 in the afternoon. Wind is cross-offshore again, so it'll be clean. This is promising, but it's also almost two weeks away, so don't pin all your hopes on it just yet. The wave comment is "marginal surf forecast or questionable tide conditions," so there's a catch.
By Friday the 25th, the swell drops a touch to 6 ft in the morning, with an 11-second period, which is a nice long-period groundswell, but the wind swings cross-shore from the NE at 15 mph, which will make it lumpy. The energy is huge, hitting 698 in the morning and a massive 1619 in the afternoon. That afternoon, the swell is back up to 7 ft with a 10-second period, but the wind is a fresh 19 mph cross-shore, and it'll be a lumpy, cross-chop mess. This setup might actually be more interesting for kite surfing than paddle surfing.
After that, the swell fades quickly over the weekend of the 27th, back to 2-3 ft with weak energy in the 60s and 80s, and the window slams shut.
So, what's the call? If you're an expert who absolutely needs to get wet, the standout is Thursday the 24th morning or Wednesday the 23rd afternoon. On Thursday the 24th morning, the swell is 7 ft from the east, with a 10-second period, the energy is 996, and the wind is cross-off from the NNW at 25 mph – strong wind but clean. That'll be solid, hollow, and powerful. But it's big and only for the experienced. Remember, it's two weeks out, so treat this as a hope, not a plan. Tuesday the 22nd is a write-off with onshore wind. Everything before the 23rd is a hard pass.
Stay patient, or start checking flights somewhere else. This is a tough one.
- Rusty
Short Range ForecastHeavy rain (total 20mm), heaviest during Sun morning. Warm (max 27°C on Sun afternoon, min 20°C on Mon morning). Winds increasing (light winds from the WSW on Sun afternoon, fresh winds from the N by Mon morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Thu afternoon, min 18°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||
AM | 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 9 | SE 4 | SSE 5 | SE 10 | SE 10 | SE 9 | SE 9 | SE 9 | NE 4 | ENE 6 | E 7 | E 7 | E 8 | E 8 | E 8 | E 7 | E 7 | ESE 7 | ESE 7 | ESE 7 | ESE 12 |
Wave Graph | |||||||||||||||||||||
29 | 13 | 37 | 15 | 14 | 22 | 29 | 13 | 29 | 56 | 107 | 70 | 74 | 57 | 42 | 39 | 27 | 16 | 16 | 9 | 14 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross | cross-off | cross-off | cross-off |
High Tide | 9:48AM1.68m | 10:02PM1.59m | 10:31AM1.66m | 10:45PM1.49m | 11:15AM1.60m | 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 | |||||||
Low Tide | 3:42PM-0.05m | 4:02AM-0.08m | 4:26PM-0.01m | 4:39AM-0.01m | 5:08PM0.07m | 5:16AM0.09m | 5:51PM0.16m | 5:52AM0.20m | 6:36PM0.25m | 6:31AM0.30m | 7:28PM0.34m | 7:19AM0.38m | 8:33PM0.38m | ||||||||
6:37 | — | — | 6:37 | — | — | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — | 6:43 | — | — | |
— | 7:13 | — | — | 7:10 | — | — | 7:09 | — | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:02 | — | |
mm | — | — | 9 | 8 | 1 | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 23 | 25 | 23 | 27 | 26 | 21 | 24 | 23 | 21 | 20 | 19 | 19 | 19 | 20 | 21 | 23 | 23 | 25 | 27 | 21 |
Feels °C | 21 | 21 | 26 | 24 | 29 | 28 | 19 | 20 | 20 | 18 | 17 | 17 | 18 | 18 | 22 | 22 | 24 | 24 | 25 | 27 | 19 |
Swell 1 Height (m) Direction Period (s) | SE 9 | — | E 8 | SE 5 | SE 4 | SE 9 | SE 9 | SE 9 | SE 9 | S 6 | — | E 7 | E 8 | E 8 | E 8 | E 7 | E 7 | ESE 7 | ESE 7 | ESE 7 | E 6 |
29 | — | 1 | 10 | 10 | 22 | 29 | 13 | 12 | 1 | — | 70 | 74 | 57 | 42 | 39 | 27 | 16 | 16 | 9 | 3 | |
Swell 2 Height (m) Direction Period (s) | S 5 | — | — | SE 10 | SE 10 | ESE 5 | ESE 5 | ENE 5 | S 6 | E 15 | — | SE 14 | SE 14 | SE 13 | SE 13 | SE 13 | SE 12 | SE 12 | SE 12 | SE 12 | ESE 12 |
2 | — | — | 15 | 14 | 2 | 3 | 2 | 3 | 4 | — | 8 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 14 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | ESE 5 | — | ESE 5 | S 6 | — | — | — | — | — | — | — | ESE 9 | ESE 9 | SE 9 | SE 9 | SE 9 | SE 9 |
— | — | — | — | 4 | — | 3 | 2 | — | — | — | — | — | — | — | 9 | 8 | 3 | 3 | 3 | 3 | |
Wind waves Height (m) Direction Period (s) | — | SE 4 | SSE 5 | W 3 | W 3 | S 3 | N 3 | NNW 3 | NE 4 | ENE 6 | E 7 | — | — | — | — | — | — | SSW 3 | WSW 3 | S 2 | NE 3 |
— | 13 | 37 | 2 | 1 | 4 | 5 | 1 | 29 | 56 | 107 | — | — | — | — | — | — | 3 | 2 | 1 | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1144 | 1172 | 28 | 32 | 59 | 65 | 422 | 32 | 597 | 734 | 734 | 5 | 8 | 8 | 29 | 499 | 1038 | 50 | 98 | 289 | 325 |
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.










