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Cape Northumberland Surf Forecast
/ SA – East Coast (28 breaks) / South Australia (91 breaks) /
Surf Forecasts:
Cape Northumberland surfForecast / SA – East Coast / Australia
12 Day Weather and Surf, issued 2 pm Thursday 02 Oct 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 Friday (Oct 03) at 3AM. The primary swell is predicted to be 5.5m and 17s period with a secondary swell of 5.0m and 18s. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at Cape Northumberland in the next 12 days are 8.0m 16s and forecast to arrive on Thursday (Oct 09) at 4PM. Winds are predicted to be 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 Saturday (Oct 04) at 9PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 3rd Oct) | 18ft (5.5m) 17s |
| Best Surf | 3AM (Fri 3rd Oct) | 18ft (5.5m) 17s |
| Most Powerful | 4PM (Thu 9th Oct) | 26ft (8.0m) 16s |
Table - best surf conditions forecast for Cape Northumberland over the next 12 days.
Short Range Forecast Mostly dry. Warm (max 23°C on Sat afternoon, min 11°C on Fri night). Winds decreasing (strong winds from the W on Thu afternoon, light winds from the NNW by Fri night). | Days 3-6 Weather Summary Heavy rain (total 23mm), heaviest during Sun afternoon. Very mild (max 16°C on Sun afternoon, min 11°C on Sun night). Winds increasing (moderate winds from the W on Mon afternoon, strong winds from the NW by Tue night). | ||||||||||||||||||||||
Thu 02 | Friday 03 | Saturday 04 | Sunday 05 | Monday 06 | Tuesday 07 | Wednesday 08 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 12 | 18 | 17 | 16 | 16 | 16 | 16 | 15 | 14 | 14 | 14 | 11 | 13 | 13 | 13 | 12 | 13 | 13 | 13 | 14 | 16 | ||
Wave (?)Graph  | |||||||||||||||||||||||
 kJ (?) | 6919 | 6293 | 10993 | 7710 | 8157 | 6797 | 4738 | 2516 | 2643 | 1572 | 3037 | 4447 | 5410 | 4125 | 4048 | 4961 | 9543 | 7277 | 7953 | 18040 | 26416 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross- on | cross- on | cross | cross- off | cross- off | cross- off | cross | cross- on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | ||
High Tide / height (m) | 2:33AM 0.59 | 11:18AM 0.96 | 12:24AM 0.62 | 11:37AM 0.99 | 11:58PM 0.71 | 11:57AM 0.97 | 12:03AM 0.82 | 12:15PM 0.92 | 12:18AM 0.93 | 12:29PM 0.85 | 12:39AM 1.02 | 12:38PM 0.77 | 1:04AM 1.08 | ||||||||||
Low Tide / height (m) | 7:27PM 3:10AM 0.36 0.59 | 6:55PM 0.40 | 4:44AM 0.50 | 6:32PM 0.41 | 5:25AM 0.40 | 6:22PM 0.40 | 6:01AM 0.34 | 6:19PM 0.37 | 6:33AM 0.30 | 6:20PM 0.31 | 7:04AM 0.30 | 6:25PM 0.24 | 7:33AM 0.34 | ||||||||||
Thu 02 | Friday 03 | Saturday 04 | Sunday 05 | Monday 06 | Tuesday 07 | Wednesday 08 | |||||||||||||||||
| Sunrise | - | - | 5:41 | - | - | 5:39 | - | - | 5:37 | - | - | 5:35 | - | - | 5:35 | - | - | 5:33 | - | - | 5:31 | ||
| Sunset | 6:10 | - | - | 6:12 | - | - | 6:13 | - | - | 6:14 | - | - | 6:15 | - | - | 6:15 | - | - | 6:16 | - | - | ||
 |  | |  |  |  | |  | |  |  | | | | | | |  |  | | | |||
Rain (mm) | - | - | - | - | - | - | - | - | - | 10 | 7 | - | - | - | - | - | 4 | 2 | 3 | 4 | 2 | ||
| Temp. °C | 12 | 14 | 14 | 14 | 12 | 21 | 23 | 22 | 21 | 16 | 13 | 12 | 12 | 12 | 13 | 13 | 14 | 12 | 11 | 10 | 11 | ||
| Feels °C (?) | 3 | 8 | 9 | 10 | 10 | 17 | 19 | 15 | 13 | 11 | 5 | 5 | 6 | 5 | 4 | 4 | 5 | 5 | 0 | -1 | -1 | ||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for SA - East Coast
Offshore wind reported 15 km from Bullies (light winds from the W at HindmarshIslandAws 15 km from Bullies). 3.0m 12s groundswell from the SW with a 2.4m 19s long period groundswell from the SSW and a 1.1m 19s long period groundswell, also from the SSW. 3 swells combining so expect closeout sets.
36 km away, 52 min ago
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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