Surf Forecasts:
Diamond Beach surf forecast from 16 Sep 2026:
- Best quality surf: Monday 21 Sep, 2AM (local time) - 3.5ft (1.0m), 5s period, SSW swell with cross-offshore winds.
- Most powerful swell: Tuesday 22 Sep, 11AM (local time) - 5.5ft (1.7m), 7s period, E swell with 262 kJ wave energy.
- Next surfable swell (1★+): Monday 21 Sep, 2AM (local time) - 3.5ft (1.0m), 5s period with SSW 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 Monday (Sep 21) at 2AM. The primary swell is predicted to be 1.0m and 5s period with a secondary swell of 0.8m and 5s. Another secondary swell of 0.3m and 7s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Diamond Beach in the next 16 days are 1.7m 7s and forecast to arrive on Tuesday (Sep 22) at 11AM. 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 Friday (Sep 18) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 21st Sep) | 3.5ft (1.0m) 5s |
| Best Surf | 2AM (Mon 21st Sep) | 3.5ft (1.0m) 5s |
| Most Powerful | 11AM (Tue 22nd Sep) | 5.5ft (1.7m) 7s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Alright, let me tell you how it is for Diamond Beach.
Honestly, it’s a pretty grim run for us here. For the first week and a half, there’s just nothing to get excited about. The swell is tiny, the wind’s all wrong, and the energy is weak. From Wednesday the 16th right through to Tuesday the 29th of September, it’s a real dud. There’s a few windows where it might be clean, like Friday the 18th morning with some clean conditions and a cross-off breeze, or Wednesday the 23rd morning when it goes glassy with a small 4ft swell from the ESE, but the combined energy is only moderate (155). The standout is Wednesday the 23rd afternoon. The swell picks up a touch to 5ft from the ESE, the wind goes offshore from the NNW at just 3 mph, and that combined energy is a solid 234. It’s still not big, but that offshore wind will make the waves clean.
Now, for the real stand out – and this is a long-range call so don’t hold me to it – look at Thursday, October 1st morning. The swell jumps to 7ft from the Southeast with a 11-second period, which is a long-period groundswell. The combined energy is a whopping 1048, which is strong wave energy. That’s a proper swell. The caveat is the wind is cross-shore from the NE at 16 mph, which will create a bit of a cross-chop. The water temperature is 75°, which is 5° warmer than normal for this time of year – that’s notably warm and feels a bit exotic.
For a beginner, anything over 5ft is getting a bit much, and that 7ft swell is only going to be for the experienced crew. Because it’s an exposed beach break with that long period, expect it to close out a bit. And remember, the crowds here are sometimes a factor, so you might have some company if it lives up to the billing.
But aside from that one morning, the rest of the outlook is a write-off. A lot of poor conditions, choppy water, and not enough push. It’s a painful stretch, but it won’t stay this way forever. Forecasts can change.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Fri afternoon, min 18°C on Wed morning). Winds increasing (calm on Wed morning, fresh winds from the S by Thu afternoon). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Mon night. Warm (max 24°C on Sun afternoon, min 20°C on Sat morning). Winds increasing (light winds from the W on Sun night, fresh winds from the ENE by Mon afternoon). | ||||||||||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | |||||||||||||||
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) | ESE 9 | ESE 9 | E 5 | E 8 | S 4 | SSW 4 | E 7 | E 7 | ESE 12 | E 5 | ESE 6 | E 7 | SE 11 | S 5 | SSW 5 | ENE 5 | E 6 | E 7 | E 7 | E 7 | ESE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 8 | 8 | 5 | 10 | 12 | 22 | 9 | 15 | 14 | 41 | 90 | 124 | 38 | 64 | 53 | 85 | 173 | 260 | 262 | 187 | 152 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-off | cross-on | cross | cross-on | cross-on | on | cross-on | cross-on | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross |
High Tide | 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 | 5:46AM1.17m | 6:04PM1.40m | ||||||||
Low Tide | 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 | 11:31AM0.30m | 00:09AM0.18m | ||||||||
 | |  | | | |  | | | | |  | | |  |  |  |  | |  | | |
 | 6:41 | — | — | 6:41 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — |
 | — | 7:06 | — | — | 7:05 | — | — | 7:02 | — | — | 7:00 | — | — | 7:00 | — | — | 6:58 | — | — | 6:57 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | 2 | 2 | 6 | 3 |
Temp °C | 19 | 20 | 22 | 22 | 23 | 23 | 23 | 26 | 24 | 21 | 21 | 22 | 23 | 24 | 24 | 21 | 20 | 20 | 21 | 22 | 24 |
Feels °C | 19 | 19 | 21 | 20 | 21 | 19 | 23 | 29 | 25 | 18 | 18 | 19 | 21 | 21 | 23 | 19 | 17 | 17 | 18 | 21 | 26 |
Swell 1 Height (m) Direction Period (s) | E 5 | E 5 | E 5 | E 8 | E 8 | E 7 | S 4 | S 4 | ESE 7 | — | ESE 12 | E 7 | E 7 | ESE 7 | SSW 5 | SSE 5 | — | — | — | — | E 14 |
| kJ | 4 | 4 | 5 | 10 | 12 | 10 | 6 | 3 | 4 | — | 13 | 124 | 38 | 10 | 31 | 5 | — | — | — | — | 4 |
Swell 2 Height (m) Direction Period (s) | ESE 9 | ESE 9 | SE 9 | SE 13 | SE 12 | SE 12 | E 7 | SE 12 | ESE 12 | SE 8 | — | ESE 11 | ESE 11 | SE 11 | ESE 7 | SE 9 | — | — | — | — | — |
| kJ | 8 | 8 | 3 | 7 | 6 | 6 | 9 | 6 | 14 | 2 | — | 12 | 11 | 29 | 9 | 12 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SE 14 | SE 13 | E 7 | SE 9 | SE 9 | SE 9 | SE 12 | SE 9 | SE 9 | — | — | — | SE 11 | ENE 7 | ESE 9 | SE 8 | — | — | — | — | — |
| kJ | 7 | 7 | 1 | 3 | 3 | 3 | 6 | 3 | 3 | — | — | — | 29 | 5 | 7 | 2 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | SSW 3 | SSW 3 | S 4 | SSW 4 | W 3 | E 7 | NE 3 | E 5 | ESE 6 | SE 7 | S 4 | S 5 | SSW 5 | ENE 5 | E 6 | E 7 | E 7 | E 7 | ESE 7 |
| kJ | — | — | 2 | 3 | 12 | 22 | 1 | 15 | 5 | 41 | 90 | 119 | 20 | 64 | 53 | 85 | 173 | 260 | 262 | 187 | 152 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1135 | 1166 | 323 | 325 | 530 | 260 | 98 | 289 | 325 | 502 | 1172 | 502 | 405 | 546 | 0 | 247 | 497 | 247 | 247 | 123 | 7 |
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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