Surf Forecasts:
Diamond Beach surf forecast from 15 Sep 2026:
- Most powerful swell: Saturday 19 Sep, 5PM (local time) - 1.5ft (0.5m), 12s period, ESE swell with 77 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 0.5m 12s and forecast to arrive on Saturday (Sep 19) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 3s period and expected on Friday (Sep 18) at 11AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5PM (Sat 19th Sep) | 1.5ft (0.5m) 12s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Alright, listen up. Rusty here. Let's be honest, the next couple of weeks are a write-off for most of us. It's flat, weak, and messy. The swell is small, the period is short, and the wind is mostly onshore or cross. We're looking at a lot of days where you're fighting chop for a knee-high burger.
The water is a warm 76°F, which is a couple degrees warmer than normal for this time of year, so at least you'll be comfortable while you're getting skunked. The first ten days or so are particularly rough. Swell stays under 3 feet, and the energy is weak – we're talking numbers stuck in the 20s and 70s, just no power behind them. Right now, there's nothing here to even bother with.
But, as usual, things can change. The first glimmer of hope comes on the 26th. That Saturday, a fresh offshore wind cleans things up, and we finally see a jump in the energy to 125, with surf pushing to a metre plus. It’s not huge, still in the 3-foot range, but it's clean, and that makes it feel twice as good. The 27th has a little more size, but the wind swings back against us, so the quality just isn't there.
The biggest swell of the entire forecast shows up on the 30th. The surf will be a touch under 3 feet, but with a period of only 4 seconds, that's effectively a windswell – weak and crumbly. But, and it's a big but, the wind will be offshore, and it should be super clean. The energy reading gets to 52, which isn't anything special, but in comparison to everything else, it's a mansion on the prairie.
So, if you want to get wet, your only real windows are the 26th and the 30th. The 26th is the better bet for a clean, offshore day. The 30th has the biggest waves but the swell direction is straight east, which is poor for Diamond Beach. Both days are still small and clean enough for a log, but if you're a beginner looking to progress, this isn't the time. This spot is inconsistent, and with this forecast, a lot of this run is a total blank. Come on down for the show, not the surf.
Catch you out there.
- Rusty
Short Range ForecastMostly dry. Warm (max 23°C on Thu afternoon, min 19°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Sun morning. Warm (max 26°C on Sun afternoon, min 20°C on Sun night). Winds increasing (light winds from the ENE on Fri afternoon, fresh winds from the SSE by Sat night). | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
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) | E 5 | E 6 | E 5 | E 5 | ESE 5 | ESE 5 | ESE 6 | E 8 | SSW 4 | ESE 7 | ESE 7 | ESE 12 | SE 12 | ESE 12 | SE 11 | E 7 | E 7 | SE 11 | E 5 | E 5 | E 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 20 | 28 | 14 | 8 | 9 | 7 | 7 | 10 | 17 | 9 | 9 | 14 | 21 | 77 | 19 | 32 | 23 | 18 | 60 | 49 | 47 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | cross-on | cross | cross-on | cross-on | cross | off | cross-on | cross-on | on | on | cross-on | cross-off | off | cross | cross-on | cross-on | cross-on |
High Tide | 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 | 5:10PM1.35m | ||||||||
Low Tide | 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 | 10:39AM0.38m | 11:25PM0.26m | ||||||||
 | |  | | | | | | | |  |  |  | | |  | | | | |  | |
 | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — | 6:45 | — | — |
 | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:02 | — | — | 7:00 | — | — | 7:00 | — | — | 6:58 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — |
Temp °C | 20 | 21 | 19 | 19 | 20 | 21 | 22 | 23 | 23 | 24 | 25 | 23 | 23 | 23 | 23 | 25 | 26 | 24 | 20 | 21 | 21 |
Feels °C | 18 | 19 | 18 | 21 | 20 | 20 | 21 | 22 | 20 | 25 | 27 | 23 | 22 | 21 | 21 | 25 | 27 | 26 | 18 | 20 | 19 |
Swell 1 Height (m) Direction Period (s) | SE 9 | E 6 | E 5 | E 5 | ESE 5 | ESE 5 | ESE 6 | E 8 | E 7 | SSW 4 | ESE 7 | ESE 6 | SE 12 | — | SE 11 | E 7 | E 7 | SE 11 | S 5 | S 5 | SSE 5 |
| kJ | 13 | 28 | 14 | 8 | 9 | 6 | 6 | 10 | 8 | 5 | 9 | 4 | 21 | — | 19 | 32 | 23 | 18 | 2 | 2 | 2 |
Swell 2 Height (m) Direction Period (s) | E 15 | ESE 9 | SE 9 | ESE 9 | ESE 9 | SE 9 | E 8 | SE 12 | SE 12 | ESE 7 | S 4 | ESE 12 | — | — | E 8 | S 4 | ESE 11 | S 4 | SE 11 | S 5 | SE 8 |
| kJ | 4 | 8 | 3 | 8 | 8 | 3 | 4 | 6 | 6 | 9 | 1 | 14 | — | — | 4 | 2 | 11 | 1 | 5 | 4 | 3 |
Swell 3 Height (m) Direction Period (s) | S 5 | — | SE 14 | SE 14 | SE 13 | SE 13 | SE 13 | SE 9 | SE 9 | SE 12 | SE 12 | S 4 | — | S 4 | ESE 8 | ESE 11 | — | E 9 | SE 9 | — | SE 10 |
| kJ | 1 | — | 8 | 7 | 7 | 7 | 7 | 3 | 3 | 6 | 6 | 1 | — | 1 | 11 | 11 | — | 2 | 12 | — | 4 |
Wind waves Height (m) Direction Period (s) | E 5 | — | — | — | — | SSW 3 | SSW 2 | S 3 | SSW 4 | W 3 | — | — | ESE 3 | ESE 12 | ESE 4 | — | S 4 | E 4 | E 5 | E 5 | E 6 |
| kJ | 20 | — | — | — | — | 3 | 1 | 8 | 17 | 1 | — | — | 3 | 77 | 11 | — | 5 | 17 | 60 | 49 | 47 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1142 | 1136 | 50 | 1135 | 1166 | 502 | 502 | 1166 | 247 | 323 | 323 | 325 | 1169 | 1176 | 618 | 29 | 20 | 260 | 325 | 364 | 383 |
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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