Surf Forecasts:
Diamond Beach surf forecast from 16 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 2AM (local time) - 1.5ft (0.4m), 11s period, SE swell with cross-offshore winds.
- Most powerful swell: Monday 17 Aug, 8AM (local time) - 4.5ft (1.3m), 6s period, S swell with 111 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 2AM (local time) - 1.5ft (0.4m), 11s period with SE 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 Wednesday (Aug 19) at 2AM. The primary swell is predicted to be 0.4m and 11s period with a secondary swell of 0.2m and 6s. 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 1.3m 6s and forecast to arrive on Monday (Aug 17) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Tuesday (Aug 18) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Wed 19th Aug) | 1.5ft (0.4m) 11s |
| Best Surf | 2AM (Wed 19th Aug) | 1.5ft (0.4m) 11s |
| Most Powerful | 8AM (Mon 17th Aug) | 4.5ft (1.3m) 6s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
What’s up, it’s Rusty. Let’s just get this out of the way: the next two weeks at Diamond Beach are going to be a grind. It’s a whole lot of flat, small, and weak surf for the first week, with a couple of clean windows that just don’t have any push behind them.
The water is a touch warmer than average, sitting around 77°, but that’s about it. From the 15th through the 19th, we’re looking at waves under 3ft with almost no energy. There are some clean mornings with offshore winds, but the swell is just not there. You’d be better off doing anything else.
The 21st is the first faint sign of life, with a 3ft bump showing up in the afternoon and a moderate offshore wind. The energy jumps to 120, but the period is a weak 6 seconds, so it’ll be soft and crumbly. It’s surfable, but that’s a low bar.
After that, it’s back to the desert for a few days. Then, starting the 26th, the swell period jumps up to 15-16 seconds. That’s our first real hint of a proper groundswell. The heights are still small, but the energy is building. The problem is the wind is onshore, so it’ll be messy.
The standout in the whole forecast is the 30th and 31st. We’re looking at 4-4ft waves with an 8-second period. The energy peaks at 161, which is the strongest we see all period. The wind goes cross-offshore, and it’s going to be clean. This is the day to keep clear. It’s not a big swell, but it’s the best quality we’ve seen.
Diamond Beach is inconsistent and exposed, so this long run of poor surf isn’t out of the ordinary. But with that long-period energy showing up late, it feels like things are about to change. Don’t write the whole window off, just be ready to wait for that last burst.
Rusty out.
Short Range ForecastModerate rain (total 10mm), heaviest on Sun night. Warm (max 29°C on Mon afternoon, min 22°C on Sun afternoon). Winds decreasing (fresh winds from the S on Sun night, light winds from the N by Tue morning). | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Thu morning. Warm (max 28°C on Tue afternoon, min 22°C on Thu morning). Wind will be generally light. | |||||||||||||||||||
Sat 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||
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 | SSE 6 | SE 9 | S 3 | S 5 | SSE 6 | SSE 6 | SE 7 | SSE 7 | SE 7 | SE 11 | SE 10 | SE 9 | SE 9 | SE 8 | S 4 | ENE 5 | ENE 6 | ENE 6 | E 6 |
Wave Graph  | ||||||||||||||||||||
 kJ | 3 | 3 | 3 | 6 | 42 | 37 | 35 | 49 | 32 | 23 | 41 | 34 | 13 | 20 | 11 | 7 | 45 | 61 | 70 | 17 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | on | cross | cross-off | cross-off | off | cross-off | cross | cross-off | cross-off | cross-on | cross | off | cross-off | cross-on | on | off | cross-off |
High Tide | 11:16PM1.58m | 11:53AM1.57m | 00:04AM1.46m | 12:41PM1.53m | 00:53AM1.34m | 1:28PM1.47m | 1:42AM1.23m | 2:16PM1.42m | 2:32AM1.15m | 3:04PM1.37m | 3:25AM1.09m | 3:56PM1.35m | 4:23AM1.07m | |||||||
Low Tide | 4:51PM-0.02m | 5:15AM-0.09m | 5:37PM0.06m | 5:55AM0.02m | 6:24PM0.16m | 6:35AM0.13m | 7:14PM0.26m | 7:19AM0.23m | 8:13PM0.33m | 8:12AM0.32m | 9:17PM0.36m | 9:14AM0.37m | 10:19PM0.35m | |||||||
 |  |  |  |  |  | |  | | | | | | |  | |  | |  | | |
 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | 7:53 | — | — | 7:52 | — | — | 7:52 | — | — | 7:50 | — | — | 7:49 | — | — | 7:47 | — | — | 7:45 | — |
mm | — | — | — | 2 | 7 | — | — | 1 | — | — | — | — | — | — | 3 | — | — | 1 | 10 | 6 |
Temp °C | 25 | 24 | 24 | 24 | 25 | 25 | 29 | 28 | 25 | 28 | 28 | 25 | 27 | 26 | 23 | 28 | 27 | 25 | 26 | 22 |
Feels °C | 26 | 25 | 24 | 23 | 21 | 28 | 32 | 30 | 27 | 29 | 29 | 25 | 28 | 25 | 26 | 30 | 30 | 26 | 30 | 22 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SSE 6 | SE 9 | — | SE 8 | SSE 6 | SSE 6 | SE 7 | SSE 7 | SE 7 | SE 11 | SE 10 | SE 7 | SE 9 | S 4 | S 4 | SSE 5 | SSE 5 | ENE 6 | E 6 |
| kJ | 3 | 3 | 3 | — | 3 | 37 | 35 | 49 | 32 | 23 | 41 | 34 | 7 | 20 | 3 | 3 | 5 | 6 | 37 | 17 |
Swell 2 Height (m) Direction Period (s) | S 5 | — | SE 4 | — | S 9 | — | — | — | SE 13 | SE 12 | S 6 | SE 6 | SE 9 | ESE 7 | SE 8 | ESE 8 | ESE 8 | ESE 9 | SSE 5 | SSE 5 |
| kJ | 1 | — | 1 | — | 2 | — | — | — | 7 | 6 | 3 | 10 | 13 | 5 | 11 | 7 | 7 | 7 | 5 | 3 |
Swell 3 Height (m) Direction Period (s) | — | SE 9 | NE 4 | NE 4 | — | — | — | — | — | — | SE 11 | S 6 | — | — | E 6 | — | E 16 | E 15 | ESE 9 | ESE 9 |
| kJ | — | 3 | 1 | 1 | — | — | — | — | — | — | 29 | 6 | — | — | 3 | — | 5 | 4 | 8 | 8 |
Wind waves Height (m) Direction Period (s) | E 3 | SSE 2 | S 2 | S 3 | S 5 | — | — | NW 2 | NW 2 | — | — | WNW 3 | — | S 4 | — | S 4 | ENE 5 | ENE 6 | ENE 6 | — |
| kJ | 1 | 1 | 1 | 6 | 42 | — | — | 1 | 1 | — | — | 1 | — | 6 | — | 7 | 45 | 61 | 70 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 3151 | 1381 | 1176 | 1183 | 558 | 30 | 32 | 2 | 32 | 346 | 0 | 2 | 1174 | 153 | 169 | 318 | 56 | 50 | 0 | 260 |
Best forecast wave conditions in New Jersey | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Diamond Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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