Surf Forecasts:
Diamond Beach surf forecast from 5 Sep 2026:
- Most powerful swell: Wednesday 9 Sep, 11PM (local time) - 4.5ft (1.4m), 5s period, S 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 1.4m 5s and forecast to arrive on Wednesday (Sep 09) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Tuesday (Sep 08) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Wed 9th Sep) | 4.5ft (1.4m) 5s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Alright, Rusty here, giving you the lowdown on the next 16 days in imperial.
First things first: the first 12 days are a total bust. From Saturday the 5th to Tuesday the 15th, we’re looking at tiny, gutless waves – most of the time under 3 feet – and the wind is all over the shop. It’s cross-shore, cross-onshore, choppy, lumpy. Not worth paddling out for. There are a couple of mornings with a light offshore wind, like Monday the 14th, but the swell is barely 1 feet, so it’s just flat and clean. Save your energy.
The one and only real standout is Thursday the 17th of September. Diamond Beach is going to wake up. The Thursday morning session is the one. We’re getting a solid 7 feet of east swell, with a period of 8 seconds. That’s a decent amount of energy (639), and the wind is a light breeze from the WSW, which is a clean cross-offshore wind. That’s going to clean things up beautifully. The water is a warm 78°, which is way warmer than usual for this time of year – about 5° above average. That’s a rare treat. This is the pick of the entire forecast. It’s a bit big for beginners, but for anyone with a bit of experience, it’s going to be firing. Crowds are "sometimes" at Diamond Beach, so you might see a few other folks, but it’s not a packed house.
The afternoon of the 17th gets wrecked by a NE wind, so get on it early. Friday the 18th and Saturday the 19th still have size (7 feet and 5 feet), but the wind turns onshore and roughs it up. After that, it’s back to small stuff. So, mark your calendar for Thursday the 17th. That’s your window.
Rusty.
Short Range ForecastSome drizzle, heaviest during Sun night. Warm (max 26°C on Sat afternoon, min 20°C on Mon morning). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Thu night. Warm (max 30°C on Thu afternoon, min 21°C on Thu night). Winds decreasing (fresh winds from the SSW on Wed night, light winds from the ESE by Thu night). | |||||||||||||||||||
Sat 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | ||||||||||||||
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 8 | E 6 | E 7 | ENE 5 | E 6 | E 7 | E 10 | E 10 | E 10 | E 9 | SSW 4 | SSW 4 | S 5 | SSW 5 | SSW 4 | S 6 | S 6 | S 7 | SSE 6 | NE 4 |
Wave Graph  | ||||||||||||||||||||
 kJ | 6 | 3 | 4 | 42 | 26 | 14 | 17 | 17 | 7 | 7 | 11 | 18 | 42 | 106 | 40 | 27 | 31 | 24 | 7 | 9 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross | cross-on | cross-on | cross | cross-on | cross-off | off | cross-off | cross | cross | cross-on | cross | cross-off | cross-on | off | off | off | cross-off |
High Tide | 3:36PM1.52m | 4:21AM1.23m | 4:46PM1.54m | 5:31AM1.29m | 5:54PM1.58m | 6:35AM1.40m | 6:54PM1.65m | 7:30AM1.51m | 7:47PM1.69m | 8:19AM1.60m | 8:34PM1.70m | 9:05AM1.66m | 9:19PM1.66m | |||||||
Low Tide | 10:17PM0.20m | 10:14AM0.20m | 11:20PM0.12m | 11:20AM0.13m | 00:15AM0.03m | 12:19PM0.05m | 1:06AM-0.05m | 1:14PM-0.01m | 1:54AM-0.11m | 2:06PM-0.06m | 2:39AM-0.14m | 2:56PM-0.07m | 3:22AM-0.13m | |||||||
 |  |  | |  | | | | | |  | | | | | |  | | | | |
 | — | — | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — | 6:33 | — | — | 6:35 | — | — | 6:35 | — | — |
 | 7:23 | — | — | 7:22 | — | — | 7:21 | — | — | 7:19 | — | — | 7:16 | — | — | 7:15 | — | — | 7:14 | — |
mm | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — |
Temp °C | 26 | 25 | 23 | 22 | 22 | 22 | 23 | 23 | 22 | 25 | 24 | 24 | 25 | 24 | 26 | 30 | 24 | 23 | 26 | 23 |
Feels °C | 26 | 25 | 22 | 20 | 21 | 19 | 22 | 21 | 22 | 24 | 23 | 22 | 22 | 20 | 24 | 29 | 27 | 22 | 23 | 20 |
Swell 1 Height (m) Direction Period (s) | ENE 7 | E 6 | E 7 | SE 9 | E 6 | E 7 | E 4 | E 10 | E 10 | E 9 | E 9 | E 8 | SE 10 | SE 9 | SE 9 | S 6 | S 6 | S 7 | SSE 6 | SSE 6 |
| kJ | 4 | 3 | 4 | 3 | 26 | 14 | 3 | 17 | 7 | 7 | 6 | 1 | 4 | 3 | 3 | 27 | 31 | 24 | 7 | 4 |
Swell 2 Height (m) Direction Period (s) | ESE 8 | S 6 | SE 9 | S 5 | SE 9 | E 10 | E 10 | SE 8 | SE 8 | SE 9 | SE 9 | SE 8 | E 9 | E 9 | E 9 | ESE 9 | SE 8 | ENE 4 | SE 10 | S 6 |
| kJ | 6 | 2 | 3 | 1 | 3 | 8 | 17 | 3 | 3 | 3 | 3 | 3 | 1 | 2 | 2 | 8 | 3 | 1 | 4 | 3 |
Swell 3 Height (m) Direction Period (s) | S 6 | SE 8 | S 6 | — | E 11 | SE 9 | SE 8 | S 5 | SE 4 | — | — | SE 10 | — | — | — | E 8 | E 8 | SE 10 | — | SE 9 |
| kJ | 2 | 2 | 1 | — | 3 | 3 | 3 | 1 | 1 | — | — | 4 | — | — | — | 1 | 1 | 4 | — | 3 |
Wind waves Height (m) Direction Period (s) | — | NNW 3 | — | ENE 5 | — | — | — | WSW 3 | WNW 3 | — | SSW 4 | SSW 4 | S 5 | SSW 5 | SSW 4 | W 3 | NW 3 | NNW 2 | NNW 2 | NE 4 |
| kJ | — | 1 | — | 42 | — | — | — | 7 | 2 | — | 11 | 18 | 42 | 106 | 40 | 5 | 4 | 1 | 1 | 9 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 2393 | 497 | 223 | 289 | 91 | 32 | 158 | 65 | 85 | 3081 | 252 | 325 | 734 | 1132 | 29 | 119 | 42 | 32 | 98 | 388 |
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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