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Cape Northumberland Surf Forecast
/ SA – East Coast (28 breaks) / South Australia (91 breaks) /
Cape Northumberland surfForecast / SA – East Coast / Australia
12 Day Weather and Surf, issued 8 pm Wednesday 16 Apr 2025 ACST
Best Forecast Surf Conditions for Cape Northumberland this week:
The surf forecast for Cape Northumberland over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Apr 17) at 6AM. The primary swell is predicted to be 2.1m and 16s period. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Cape Northumberland in the next 12 days are 3.5m 15s and forecast to arrive on Tuesday (Apr 22) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Saturday (Apr 19) at 12PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Thu 17th Apr) | 7ft (2.1m) 16s |
| Best Surf | 12AM (Fri 18th Apr) | 10ft (3.0m) 15s |
| Most Powerful | 12PM (Tue 22nd Apr) | 11ft (3.5m) 15s |
Table - best surf conditions forecast for Cape Northumberland over the next 12 days.
Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | Mon 28 | |||||||||||||||||||||||||
| Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 14 | 15 | 14 | 15 | 16 | 15 | 14 | 14 | 13 | 13 | 12 | 12 | 12 | 9 | 9 | 14 | 14 | 16 | 16 | 14 | 14 | 14 | 14 | 14 | 13 | 11 | 9 | 14 | 16 | 16 | 14 | 13 | 13 | 13 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 1581 | 2620 | 3009 | 3532 | 3697 | 2869 | 2004 | 1811 | 1474 | 1144 | 940 | 589 | 1186 | 1083 | 1282 | 2379 | 3702 | 4312 | 3552 | 2448 | 2141 | 1537 | 976 | 951 | 1228 | 3040 | 1430 | 3023 | 8157 | 6824 | 3702 | 2369 | 2460 | 2242 | 1547 | 1243 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- on | on | glass | cross- on | on | cross- off | cross- off | cross- on | cross | cross- off | cross | cross | cross- on | cross | cross | cross | cross | cross- off | cross | cross | glass | cross | on | cross- on | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross | cross- off |
High Tide / height (m) | 12:56AM 0.75 | 2:31PM 1.11 | 12:57AM 0.74 | 3:01PM 1.09 | 12:47AM 0.73 | 3:36PM 1.05 | 12:03AM 0.75 | 4:24PM 0.99 | 6:20PM 0.92 | 9:40PM 0.93 | 10:32PM 0.93 | 11:23AM 0.72 | 11:04PM 0.90 | 11:25AM 0.84 | 11:27PM 0.85 | 11:45AM 0.96 | 11:43PM 0.77 | 12:11PM 1.06 | 11:51PM 0.70 | 12:40PM 1.13 | ||||||||||||||||
Low Tide / height (m) | 7:14AM 0.20 | 8:52PM 0.60 | 7:29AM 0.20 | 9:25PM 0.67 | 7:45AM 0.23 | 10:14PM 0.74 | 8:00AM 0.28 | 8:08AM 0.35 | 7:53AM 0.44 | 6:56AM 0.51 | 5:58AM 0.55 | 4:33PM 0.57 | 5:31AM 0.53 | 5:30PM 0.50 | 5:24AM 0.49 | 6:15PM 0.47 | 5:25AM 0.42 | 6:55PM 0.46 | 5:33AM 0.33 | |||||||||||||||||
Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | Mon 28 | |||||||||||||||||||||||||
| Sunrise | - | 6:35 | - | - | 6:35 | - | - | 6:35 | - | - | 6:37 | - | - | 6:37 | - | - | 6:39 | - | - | 6:39 | - | - | 6:41 | - | - | 6:41 | - | - | 6:43 | - | - | 6:43 | - | - | 6:45 | - |
| Sunset | - | - | 5:37 | - | - | 5:37 | - | - | 5:35 | - | - | 5:34 | - | - | 5:32 | - | - | 5:30 | - | - | 5:30 | - | - | 5:29 | - | - | 5:27 | - | - | 5:25 | - | - | 5:24 | - | - | 5:23 |
 |  | | |  | | |  | |  | |  |  | | |  | | | | | | | | | |  | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | 1 | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 23 | 20 | 19 | 15 | 17 | 16 | 16 | 23 | 21 | 17 | 17 | 16 | 15 | 15 | 14 | 13 | 13 | 13 | 14 | 15 | 15 | 14 | 17 | 16 | 15 | 14 | 13 | 13 | 12 | 12 | 12 | 13 | 12 | 14 | 14 | 14 |
| Feels °C (?) | 21 | 20 | 18 | 14 | 14 | 14 | 15 | 21 | 17 | 13 | 10 | 10 | 11 | 9 | 9 | 8 | 9 | 9 | 11 | 14 | 13 | 13 | 16 | 14 | 14 | 6 | 4 | 4 | 4 | 4 | 6 | 9 | 7 | 12 | 10 | 7 |
Short Range Forecast: Mostly dry. Warm (max 23°C on Wed night, min 15°C on Thu night). Wind will be generally light. | Days 3-6 Weather Summary Light rain (total 2mm), mostly falling on Sun afternoon. Very mild (max 17°C on Sat night, min 13°C on Mon afternoon). Winds decreasing (strong winds from the NNW on Sun morning, light winds from the SSE by Tue morning). | Days 6-9 Weather Summary Some drizzle, heaviest during Fri morning. Very mild (max 17°C on Thu morning, min 13°C on Tue night). Winds increasing (calm on Wed night, strong winds from the SE by Fri afternoon). | Long Range Forecast: Mostly dry. Very mild (max 14°C on Sun night, min 12°C on Fri night). Winds decreasing (fresh winds from the SE on Fri night, light winds from the S by Sun night). | |||||||||||||||||||||||||||||||||
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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 Cape Northumberland 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 Cape Northumberland Surf forecast
The above surf forecast table for Cape Northumberland provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Cape Northumberland can be found by selecting the local surf guide option on the grey menu. Our Cape Northumberland 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 (Cape Northumberland) 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 Cape Northumberland 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.
Cape Northumberland is 6 km (4 miles) from Allendale East. If you plan a holiday in South Australia - East Coast, look for hotels and other accommodation in Allendale East. Allendale East has rooms for a wide range of budgets as well as car hire and transport links.
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