Surf Forecasts:
Diamond Beach surf forecast from 17 Aug 2026:
- Most powerful swell: Monday 17 Aug, 5AM (local time) - 4.5ft (1.3m), 6s period, S swell with 108 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 1.3m 6s and forecast to arrive on Monday (Aug 17) at 5AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Monday (Aug 17) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Mon 17th Aug) | 4.5ft (1.3m) 6s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Alright, this is Rusty, and I’m staring down the surf forecast for Diamond Beach. I gotta be straight with you – we’ve got a long, slow grind ahead before anything really gets going. The first decent chance of a wave doesn’t show up until Friday the 28th of August, and even then, it’s a bit of a struggle.
Let’s run through it. From now until the end of the month, it’s mostly tiny, weak energy. The swell is barely a ripple, with combined energy mostly in the teens and twenties (51 down to 9), and periods are short. The wind is a mixed bag – some clean moments, but the swell just isn't there. You’ll see a few glassy mornings on the 20th and 22nd, but those waves are only 0.7 ft to 1.0 ft. It’s a flat spell.
The real standout is Saturday the 29th of August. That morning, we finally get a pulse of proper energy. The swell comes in at 3 ft from the SE, with a period of 12 seconds. That’s a decent groundswell, and combined energy jumps to 295 (moderate). The wind is offshore from the NW, so it’ll be clean. That’s your best chance for a wave that actually has some shape and push. The wave comment says “expect good surf conditions,” which is high praise after this drought. It’s a little on the small side, but it’s clean, and for a spot that’s inconsistent, that’s a moment to be on the water.
The day before, Friday the 28th, is a warm-up. Swell builds to 4 ft to 4 ft from the E, but it’s short period (5–6 seconds) and the combined energy is moderate (111 to 153). The wind is offshore, so it’s clean, but the surf is described as “very ordinary.” It’s a possible session, but not the one to set your watch by.
After the 29th, it drops off again. The 30th and 31st have some small, weak swell, and the wind turns onshore, so it’s back to the struggle.
Overall, the water is about average for the time of year. Diamond Beach is exposed to the SE, and the optimum swell is from the SE, so when it does come, it’s in the right direction. The crowds are “sometimes” here, so you might have a few others with the same idea on the 29th, but it won’t be a circus.
Honestly, the only true standout is the morning of the 29th. Everything else is a long wait.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Sun night. Warm (max 29°C on Mon afternoon, min 23°C on Sun night). Winds decreasing (fresh winds from the S on Sun night, calm by Tue night). | Days 5-7 Weather SummaryHeavy rain (total 27mm), heaviest during Thu afternoon. Warm (max 27°C on Wed night, min 23°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | ||||||||||||||
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) | S 5 | SSE 6 | SSE 6 | SSE 6 | SE 7 | SSE 7 | SE 11 | SE 10 | SE 9 | SE 9 | ESE 8 | ESE 8 | ESE 9 | ENE 5 | E 4 | ESE 8 | ESE 8 | ESE 8 | ESE 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 114 | 51 | 17 | 17 | 22 | 17 | 56 | 34 | 22 | 12 | 7 | 7 | 8 | 27 | 10 | 14 | 13 | 6 | 7 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | cross-on | cross | glassy | cross-on | cross-off | cross-on | cross-on | cross | cross | glassy | cross |
High Tide | 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 | 4:53PM1.35m | |||||||
Low Tide | 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 | 10:15AM0.37m | 11:13PM0.31m | |||||||
 |  |  |  |  | |  | | | | |  | | |  | | | | | |
 | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — |
 | 7:52 | — | 7:52 | — | — | 7:50 | — | — | 7:49 | — | — | 7:47 | — | — | 7:45 | — | — | 7:45 | — |
mm | 4 | 1 | — | 2 | — | — | — | — | — | — | 5 | 6 | 4 | 1 | 7 | 3 | 1 | — | 5 |
Temp °C | 25 | 26 | 29 | 29 | 26 | 29 | 28 | 26 | 28 | 27 | 24 | 26 | 27 | 25 | 24 | 25 | 23 | 26 | 26 |
Feels °C | 22 | 28 | 30 | 32 | 28 | 29 | 27 | 27 | 29 | 27 | 26 | 29 | 30 | 26 | 26 | 28 | 27 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | — | SSE 6 | SSE 6 | SSE 6 | SE 7 | SSE 7 | SE 11 | SE 10 | — | S 4 | S 4 | ESE 8 | ESE 9 | ESE 8 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | E 5 |
| kJ | — | 51 | 17 | 17 | 22 | 17 | 56 | 34 | — | 7 | 2 | 7 | 8 | 7 | 7 | 14 | 13 | 6 | 4 |
Swell 2 Height (m) Direction Period (s) | — | — | SE 7 | SE 9 | — | SE 9 | — | NE 4 | NE 4 | SE 9 | SE 5 | SSE 5 | SSE 5 | SE 5 | — | — | SE 13 | ESE 4 | ESE 8 |
| kJ | — | — | 7 | 3 | — | 3 | — | 1 | 1 | 12 | 4 | 2 | 3 | 1 | — | — | 7 | 1 | 6 |
Swell 3 Height (m) Direction Period (s) | — | — | SE 9 | — | SE 13 | SE 12 | — | NE 4 | — | SSE 6 | ESE 8 | E 6 | E 8 | E 15 | E 15 | SE 14 | SE 9 | ENE 5 | SE 13 |
| kJ | — | — | 3 | — | 7 | 5 | — | 1 | — | 3 | 7 | 3 | 1 | 4 | 4 | 8 | 3 | 2 | 7 |
Wind waves Height (m) Direction Period (s) | S 5 | WSW 3 | — | — | — | — | WNW 2 | — | SE 9 | S 4 | — | — | — | ENE 5 | E 4 | E 4 | ENE 3 | — | — |
| kJ | 114 | 3 | — | — | — | — | 1 | — | 22 | 7 | — | — | — | 27 | 10 | 5 | 4 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1393 | 2 | 30 | 98 | 98 | 229 | 2 | 91 | 502 | 119 | 1135 | 1519 | 556 | 376 | 1135 | 158 | 98 | 611 | 289 |
Best forecast wave conditions in New Jersey | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
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.
Nearest