Surf Forecasts:
Cape Northumberland surf forecast from 30 Sep 2026:
- Best quality surf: Monday 5 Oct, 4AM (local time) - 10ft (3.0m), 16s period, SW swell with offshore winds.
- Most powerful swell: Wednesday 7 Oct, 7AM (local time) - 15ft (4.5m), 15s period, SW swell with 9,375 kJ wave energy.
- Next surfable swell (1★+): Thursday 1 Oct, 6PM (local time) - 7.5ft (2.3m), 14s period with SW swell.
Best Forecast Surf Conditions for Cape Northumberland this week:
The surf forecast for Cape Northumberland over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Oct 01) at 6PM. The primary swell is predicted to be 2.3m and 14s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Cape Northumberland in the next 16 days are 4.5m 15s and forecast to arrive on Wednesday (Oct 07) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Saturday (Oct 03) at 6AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Thu 1st Oct) | 7.5ft (2.3m) 14s |
| Best Surf | 4AM (Mon 5th Oct) | 10ft (3.0m) 16s |
| Most Powerful | 7AM (Wed 7th Oct) | 15ft (4.5m) 15s |
Table - best surf conditions forecast for Cape Northumberland over the next 16 days.
Short Range ForecastLight rain (total 6mm), mostly falling on Fri morning. Very mild (max 18°C on Wed morning, min 10°C on Fri night). Winds increasing (light winds from the W on Wed morning, fresh winds from the SSE by Fri afternoon). | Days 4-6 Weather SummaryMostly dry. Very mild (max 15°C on Mon morning, min 9°C on Sun night). Winds decreasing (fresh winds from the SE on Sat afternoon, light winds from the N by Mon morning). | ||||||||||||||||||||
Wednesday 30 | Thursday 1 | Friday 2 | Saturday 3 | Sunday 4 | Monday 5 | Tuesday 6 | |||||||||||||||
AM | 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) | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 15 | SW 14 | SSW 14 | SW 14 | SSW 14 | SW 15 | SW 16 | SW 15 | SW 16 | SW 15 | SW 16 | SW 16 | SW 15 | SW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2349 | 2545 | 2704 | 2111 | 1983 | 2035 | 2803 | 2777 | 3110 | 3456 | 2667 | 2651 | 3671 | 3650 | 2278 | 3955 | 3633 | 3396 | 2421 | 1669 | 6120 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross | on | cross-on | cross |
High Tide | 1:00PM0.71m | 2:11AM1.07m | 12:53PM0.69m | 2:41AM1.04m | 12:38PM0.72m | 3:14AM0.96m | 12:17PM0.77m | 3:50AM0.87m | 4:50AM0.76m | 11:45AM0.90m | 1:37AM0.55m | ||||||||||
Low Tide | 7:07PM0.11m | 8:27AM0.48m | 7:21PM0.06m | 8:44AM0.59m | 7:36PM0.05m | 8:49AM0.69m | 7:52PM0.08m | 8:18AM0.76m | 8:06PM0.15m | 6:08AM0.76m | 8:08PM0.26m | 7:42PM0.37m | |||||||||
 |  |  |  |  |  | | | | |  |  | | | | | | | | | | |
 | 5:45 | — | — | 5:43 | — | — | 5:41 | — | — | 5:41 | — | — | 6:39 | — | — | 5:37 | — | — | 5:35 | — | — |
 | — | 6:09 | — | — | 6:09 | — | — | 6:10 | — | — | 6:12 | — | — | 7:13 | — | — | 6:14 | — | — | 6:15 | — |
mm | 1 | 1 | — | — | — | 1 | 3 | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — |
Temp °C | 18 | 16 | 14 | 16 | 15 | 14 | 12 | 12 | 11 | 13 | 12 | 12 | 11 | 11 | 11 | 15 | 15 | 14 | 12 | 12 | 11 |
Feels °C | 18 | 14 | 13 | 14 | 12 | 11 | 7 | 5 | 4 | 7 | 5 | 6 | 6 | 5 | 6 | 12 | 12 | 11 | 5 | 5 | 5 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 15 | SW 14 | SSW 14 | SW 14 | SSW 14 | SW 15 | SW 16 | SW 15 | SW 16 | SW 15 | SW 16 | SW 16 | SW 15 | SW 14 |
| kJ | 2349 | 2545 | 2704 | 2111 | 1983 | 2035 | 2803 | 2777 | 3110 | 3456 | 2667 | 2651 | 3671 | 3650 | 2278 | 3955 | 3633 | 3396 | 2421 | 1669 | 6120 |
Swell 2 Height (m) Direction Period (s) | WNW 6 | — | — | — | — | — | — | — | — | — | — | — | — | SSW 20 | SSW 18 | — | — | — | — | — | — |
| kJ | 6 | — | — | — | — | — | — | — | — | — | — | — | — | 603 | 1579 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | SSE 4 | SSE 4 | SSE 6 | SE 6 | SSE 5 | SE 5 | ESE 5 | SE 5 | SE 5 | — | — | — | WSW 6 | SW 9 | — |
| kJ | — | — | — | — | — | — | 13 | 36 | 113 | 143 | 86 | 80 | 83 | 56 | 16 | — | — | — | 146 | 1089 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 7 | 20 | 7 | 7 | 92 | 0 | 127 | 412 | 412 | 412 | 464 | 127 | 393 | 310 | 9 | 0 | 71 | 20 | 273 | 310 | 412 |
Best forecast wave conditions in South Australia - East Coast | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 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 16 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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